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4.
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Measuring the Geometry of the Universe from Weak Gravitational Lensing behind Galaxy Groups in the HST COSMOS survey
/ Taylor, James E ; Massey, Richard J ; Leauthaud, Alexie ; George, Matthew R ; Rhodes, Jason ; Kitching, Thomas D ; Capak, Peter ; Ellis, Richard ; Finoguenov, Alexis ; Ilbert, Olivier et al.
Gravitational lensing can provide pure geometric tests of the structure of space-time, for instance by determining empirically the angular diameter distance-redshift relation. [...]
arXiv:1111.3370.
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2011.
Preprint
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5.
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Neutrino fluxes from nonuniversal Higgs mass LSP annihilations in the Sun
/ Ellis, J (CERN ; King's Coll. London) ; Olive, K A (Minnesota U. ; Stanford U., Phys. Dept. ; SLAC) ; Spanos, V C (Democritos Nucl. Res. Ctr.) ; Savage, C (Stockholm U., OKC)
We extend our previous studies of the neutrino fluxes expected from neutralino LSP annihilations inside the Sun to include variants of the minimal supersymmetric extension of the Standard Model (MSSM) with squark, slepton and gaugino masses constrained to be universal at the GUT scale, but allowing one or two nonuniversal supersymmetry breaking parameters contributing to the Higgs masses (NUHM1,2). As in the constrained MSSM (CMSSM) with universal Higgs masses, there are large regions of the NUHM parameter space where the LSP density inside the Sun is not in equilibrium, so that the annihilation rate may be far below the capture rate, and there are also large regions where the capture rate is not dominated by spin-dependent LSP-proton scattering. [...]
2011
- Published in : Phys. Rev. D 83 (2011) 085023
APS Published version, local copy: PDF;
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6.
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Phenomenology and Cosmology of an Electroweak Pseudo-Dilaton and Electroweak Baryons
/ Campbell, Bruce A. (Carleton U. ; CERN) ; Ellis, John (King's Coll. London ; CERN) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
In many strongly-interacting models of electroweak symmetry breaking the lowest-lying observable particle is a pseudo-Goldstone boson of approximate scale symmetry, the pseudo-dilaton. Its interactions with Standard Model particles can be described using a low-energy effective nonlinear chiral Lagrangian supplemented by terms that restore approximate scale symmetry, yielding couplings of the pseudo-dilaton that differ from those of a Standard Model Higgs boson by fixed factors. [...]
KCL-PH-TH-2011-38; LCTS-2011-20; CERN-PH-TH-2011-283; FTPI-MINN-11-27; arXiv:1111.4495; UMN-TH-3019-11; KCL-PH-TH-2011-38; LCTS-2011-20; CERN-PH-TH-2011-283; UMN-TH-3019-11; FTPI-MINN-11-27.-
2012 - 34 p.
- Published in : JHEP 03 (2012) 026
Preprint: PDF; Springer Open Access article: PDF; External link: Preprint
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8.
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A complex multi-notch astronomical filter to suppress the bright infrared sky
/ Bland-Hawthorn, J ; Ellis, S C ; Leon-Saval, S G ; Haynes, R ; Roth, M M ; Löhmannsröben, H -G ; Horton, A J ; Cuby, J -G ; Birks, T A ; Lawrence, J S et al.
A long-standing and profound problem in astronomy is the difficulty in obtaining deep near-infrared observations due to the extreme brightness and variability of the night sky at these wavelengths. [...]
arXiv:1112.1694.
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2011.
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12.
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The Sydney-AAO Multi-object Integral field spectrograph (SAMI)
/ Croom, Scott M (University of Sydney ; ARC Centre of Excellence for All-sky Astrophysics) ; Lawrence, Jon S (Australian Astronomical Observatory ; Macquarie University) ; Bland-Hawthorn, Joss (University of Sydney) ; Bryant, Julia J (University of Sydney) ; Fogarty, Lisa (University of Sydney) ; Richards, Samuel (University of Sydney) ; Goodwin, Michael (Australian Astronomical Observatory) ; Farrell, Tony (Australian Astronomical Observatory) ; Miziarski, Stan (Australian Astronomical Observatory) ; Heald, Ron (Australian Astronomical Observatory) et al.
We demonstrate a novel technology that combines the power of the multi-object spectrograph with the spatial multiplex advantage of an integral field spectrograph (IFS). [...]
arXiv:1112.3367.
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2011.
Preprint
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17.
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Jet Substructure at the Tevatron and LHC: New results, new tools, new benchmarks
/ Altheimer, A. (Columbia U.) ; Arora, S. (Rutgers U., Piscataway) ; Asquith, L. (Argonne) ; Brooijmans, G. (Columbia U.) ; Butterworth, J. (University Coll. London) ; Campanelli, M. (University Coll. London) ; Chapleau, B. (McGill U.) ; Cholakian, A.E. (Columbia U. ; Harvard U., Phys. Dept.) ; Chou, J.P. (Brown U.) ; Dasgupta, M. (Manchester U.) et al.
In this report we review recent theoretical progress and the latest experimental results in jet substructure from the Tevatron and the LHC. We review the status of and outlook for calculation and simulation tools for studying jet substructure. [...]
arXiv:1201.0008; SLAC-R-990; FERMILAB-PUB-12-897-T.-
2012 - 53 p.
Fulltext: arXiv:1201.0008 - PDF; fermilab-pub-12-897-t - PDF; External links: SLAC Document Server; Fermilab Library Server (fulltext available)
In : Boost 2011, Princeton, United States Of America, 22 - 26 May 2011, pp.063001
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18.
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Electrically driven photonic crystal nanocavity devices
/ Shambat, Gary ; Ellis, Bryan ; Petykiewicz, Jan ; Mayer, Marie A ; Majumdar, Arka ; Sarmiento, Tomas ; Harris, James ; Haller, Eugene E ; Vuckovic, Jelena
Interest in photonic crystal nanocavities is fueled by advances in device performance, particularly in the development of low-threshold laser sources. [...]
arXiv:1201.0964.
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2012.
Preprint
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27.
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A Historical Profile of the Higgs Boson
/ Ellis, John (King's Coll. London ; CERN) ; Gaillard, Mary K. (UC, Berkeley ; LBL, Berkeley) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy)
The Higgs boson was postulated in 1964, and phenomenological studies of its possible production and decays started in the early 1970s, followed by studies of its possible production in e+ e-, pbar p and pp collisions, in particular. [...]
arXiv:1201.6045 ; KCL-PH-TH-2012-04 ; LCTS-2012-01 ; CERN-PH-TH-2012-009 ; LBNL ; UCB-PTH-12-01 ; ACT-1-12 ; MIFPA-12-01 ; KCL-PH-TH-2012-04 ; LCTS-2012-01 ; CERN-PH-TH-2012-009 ; UCB-PTH-12-01 ; ACT-1-12 ; MIFPA-12-01.
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2012. - 22 p, 22 p.
Preprint - Full text
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28.
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Limits on the Stochastic Gravitational Wave Background from the North American Nanohertz Observatory for Gravitational Waves
/ Demorest, P B ; Ferdman, R D ; Gonzalez, M E ; Nice, D ; Ransom, S ; Stairs, I H ; Arzoumanian, Z ; Brazier, A ; Burke-Spolaor, S ; Chamberlin, S J et al.
We present an analysis of high-precision pulsar timing data taken as part of the North American Nanohertz Observatory for Gravitational waves (NANOGrav) project. [...]
arXiv:1201.6641.
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2012.
Preprint
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29.
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Prospective Constraints on Neutrino Masses from a Core-Collapse Supernova
/ Ellis, John (King's Coll. London ; CERN) ; Janka, Hans-Thomas (Garching, Max Planck Inst.) ; Mavromatos, Nikolaos E. (King's Coll. London ; CERN) ; Sakharov, Alexander S. (CERN ; Wayne State U.) ; Sarkisyan, Edward K.G. (CERN ; Texas U., Arlington)
We discuss the prospects for improved upper limits on neutrino masses that may be provided by a core-collapse supernova explosion in our galaxy, if it exhibits time variations in the neutrino emissions on the scale of a few milliseconds as suggested by recent two-dimensional simulations. Analyzing simulations of such neutrino emissions using the wavelet technique adopted in [1], we find that an upper limit m_nu ~ 0.14 eV could be established at the 95% confidence level if the time variations in emissions were to be preserved during neutrino propagation to the Earth..
arXiv:1202.0248; KCL-PH-TH-2012-05; LCTS-2012-02; CERN-PH-TH-2012-010; KCL-PH-TH-2012-05; LCTS-2012-02; CERN-PH-TH-2012-010.-
2012 - 10 p.
- Published in : Phys. Rev. D 85 (2012) 105028
APS published version, local copy: PDF; Fulltext: PDF; External link: Preprint
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36.
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Revisiting the Higgs Mass and Dark Matter in the CMSSM
/ Ellis, John (King's Coll. London ; CERN) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
Taking into account the available accelerator and astrophysical constraints, the mass of the lightest neutral Higgs boson h in the minimal supersymmetric extension of the Standard Model with universal soft supersymmetry-breaking masses (CMSSM) has been estimated to lie between 114 and ~ 130 GeV. Recent data from ATLAS and CMS hint that m_h ~ 125 GeV, though m_h ~ 119 GeV may still be a possibility. [...]
KCL-PH-TH-2012-08; LCTS-2012-04; CERN-PH-TH-2012-045; UMN-TH-3034-12; FTPI-MINN-12-07; arXiv:1202.3262; UMN--TH--3034-12; FTPI--MINN--12-07; KCL-PH-TH-2012-08; LCTS-2012-04; CERN-PH-TH-2012-045; UMN-TH-3034-12; FTPI-MINN-12-07.-
2012-05-22 - 24 p.
- Published in : Eur. Phys. J. C 72 (2012) 2005
Preprint: PDF; External link: Preprint
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39.
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NLO Higgs boson production plus one and two jets using the POWHEG BOX, MadGraph4 and MCFM
/ Campbell, John M. (Fermilab) ; Ellis, R.Keith (Fermilab) ; Frederix, Rikkert (Zurich U.) ; Nason, Paolo (INFN, Milan Bicocca) ; Oleari, Carlo (INFN, Milan Bicocca ; Milan Bicocca U.) ; Williams, Ciaran (Fermilab)
We present a next-to-leading order calculation of Higgs boson production plus one and two jets via gluon fusion interfaced to shower Monte Carlo programs, implemented according to the POWHEG method. For this implementation we have used a new interface of the POWHEG BOX with MadGraph4, that generates the codes for generic Born and real processes automatically. [...]
FERMILAB-PUB-12-040-T; CERN-PH-TH-2012-048; arXiv:1202.5475; CERN-PH-TH-2012-048.-
2012 - 27 p.
- Published in : JHEP 12 (2012) 092
Preprint: PDF; External link: Fulltext
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41.
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Does the `Higgs' have Spin Zero?
/ Ellis, John (King's Coll. London ; CERN) ; Hwang, Dae Sung (Sejong U.)
The Higgs boson is predicted to have spin zero. The ATLAS and CMS experiments have recently reported of an excess of events with mass ~ 125 GeV that has some of the characteristics expected for a Higgs boson. [...]
arXiv:1202.6660; KCL-PH-TH-2012-11; LCTS-2012-06; CERN-PH-TH-2012-058.-
2012 - 22 p.
- Published in : JHEP 09 (2012) 071
Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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42.
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Les Houches 2011: Physics at TeV Colliders New Physics Working Group Report
/ Brooijmans, G. (Columbia U.) ; Gripaios, B. (Cambridge U.) ; Moortgat, F. (Zurich, ETH) ; Santiago, J. (CAFPE, Granada ; Granada U., Theor. Phys. Astrophys.) ; Skands, P. (CERN) ; Albornoz Vásquez, D. (Paris, Inst. Astrophys.) ; Allanach, B.C. (Cambridge U., DAMTP) ; Alloul, A. (Strasbourg, IPHC ; Strasbourg, IReS) ; Arbey, A. (CERN ; Lyon, IPN ; Lyon Observ.) ; Azatov, A. (INFN, Rome ; Rome U.) et al.
We present the activities of the 'New Physics' working group for the 'Physics at TeV Colliders' workshop (Les Houches, France, 30 May-17 June, 2011). Our report includes new agreements on formats for interfaces between computational tools, new tool developments, important signatures for searches at the LHC, recommendations for presentation of LHC search results, as well as additional phenomenological studies..
arXiv:1203.1488; FERMILAB-CONF-12-924-T.-
2012 - 243 p.
- Published in : , pp. 221-463
Fermilab Library: PDF; Fulltext: PDF; External link: Fermilab Library
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56.
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Bypassing the bandwidth theorem with PT symmetry
/ Ramezani, Hamidreza (Department of Physics, Wesleyan University, Middletown, CT, USA) ; Schindler, J (Department of Physics, Wesleyan University, Middletown, CT, USA) ; Ellis, F M (Department of Physics, Wesleyan University, Middletown, CT, USA) ; Guenther, Uwe (Helmholtz Center Dresden-Rossendorf, Dresden, Germany) ; Kottos, Tsampikos (Department of Physics, Wesleyan University, Middletown, CT, USA)
The beat time {\tau}_{fpt} associated with the energy transfer between two coupled oscillators is dictated by the bandwidth theorem which sets a lower bound {\tau}_{fpt}\sim 1/{\delta}{\omega}. [...]
arXiv:1205.1847.
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2012.
Preprint
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57.
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Monitoring of computing resource utilization of the ATLAS experiment
/ Rousseau, D (LAL, Univ. Paris-Sud and CNRS/IN2P3, Orsay, France) ; Dimitrov, G (CERN) ; Vukotic, I (University of Chicago, 5620 S Ellis Ave, Chicago IL 60637, USA) ; Aidel, O (Domaine scientifique de la Doua, Centre de Calcul CNRS/IN2P3, Villeurbanne, France) ; Schaffer, RD (LAL, Univ. Paris-Sud and CNRS/IN2P3, Orsay, France) ; Albrand, S (Laboratoire de Physique Subatomique et de Cosmologie, Grenoble, France)
Due to the good performance of the LHC accelerator, the ATLAS experiment has seen higher than anticipated levels for both the event rate and the average number of interactions per bunch crossing. In order to respond to these changing requirements, the current and future usage of CPU, memory and disk resources has to be monitored, understood and acted upon. [...]
ATL-SOFT-SLIDE-2012-198.-
Geneva : CERN, 2012 - 1 p.
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012
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60.
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Space-quality data from balloon-borne telescopes: the High Altitude Lensing Observatory (HALO)
/ Rhodes, Jason ; Dobke, Benjamin ; Booth, Jeffrey ; Massey, Richard ; Liewer, Kurt ; Smith, Roger ; Amara, Adam ; Aldrich, Jack ; Berge, Joel ; Bezawada, Naidu et al.
We present a method for attaining sub-arcsecond pointing stability during sub- orbital balloon flights, as designed for in the High Altitude Lensing Observatory (HALO) concept. [...]
arXiv:1205.2957.
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2012.
Preprint
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61.
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Monitoring of computing resource utilization of the ATLAS experiment
/ Rousseau, D (Orsay, LAL) ; Dimitrov, G (CERN) ; Vukotic, I (Chicago U., CISES) ; Aidel, O (Lyon, IPN) ; Schaffer, RD (Orsay, LAL) ; Albrand, S (LPSC, Grenoble)
Due to the good performance of the LHC accelerator, the ATLAS experiment has seen higher than anticipated levels for both the event rate and the average number of interactions per bunch crossing. [...]
ATL-SOFT-PROC-2012-034.
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2012. - 7 p.
Original Communication (restricted to ATLAS) - Full text
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64.
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Einstein's Real "Biggest Blunder"
/ Ellis, Homer G
Albert Einstein's real "biggest blunder" was not the 1917 introduction into his gravitational field equations of a cosmological constant term \Lambda, rather was his failure in 1916 to distinguish between the entirely different concepts of active gravitational mass and passive gravitational mass. [...]
arXiv:1205.5552.
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2012.
Preprint
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66.
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Hubble Space Telescope studies of low-redshift Type Ia supernovae: Evolution with redshift and ultraviolet spectral trends
/ Maguire, K ; Sullivan, M ; Ellis, R S ; Nugent, P E ; Howell, D A ; Gal-Yam, A ; Cooke, J ; Mazzali, P ; Pan, Y-C ; Dilday, B et al.
We present an analysis of the maximum light, near ultraviolet (NUV; 2900-5500 A) spectra of 32 low redshift (0.001<z<0.08) Type Ia supernovae (SNe Ia), obtained with the Hubble Space Telescope (HST). [...]
arXiv:1205.7040.
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2012.
Preprint
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69.
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Extragalactic Science and Cosmology with the Subaru Prime Focus Spectrograph (PFS)
/ Ellis, Richard ; Takada, Masahiro ; Aihara, Hiroaki ; Arimoto, Nobuo ; Bundy, Kevin ; Chiba, Masashi ; Cohen, Judith ; Dore, Olivier ; Greene, Jenny E ; Gunn, James et al.
The Subaru Prime Focus Spectrograph (PFS) is a massively-multiplexed fiber-fed optical and near-infrared spectrograph (N=2400, 380<lambda<1300nm), offering unique opportunities in survey astronomy [...]
arXiv:1206.0737.
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2012.
Preprint
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71.
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Topological and Central Trigger Processor for 2014 LHC luminosities
/ Simioni, E (Institut fur Physik, Universitaet Mainz) ; Anders, G ; Bauss, B ; Berge, D ; B\"{u}scher, V ; Childers, T ; Degele, R ; Dobson, E ; Ebling, A ; Ellis, N et al.
The ATLAS experiment is located at the European Center for Nu- clear Research (CERN) in Switzerland. It is designed to observe phe- nomena that involve highly massive particles produced in the collisions at the Large Hadron Collider (LHC): the world’s largest and highest-energy particle accelerator. [...]
ATL-DAQ-SLIDE-2012-372.-
Geneva : CERN, 2012 - 15.
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : 18th IEEE Real-Time Conference 2012, Berkeley, California, 11 - 15 Jun 2012
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73.
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Newborn spheroids at high redshift: when and how did the dominant, old stars in today's massive galaxies form?
/ Kaviraj, S ; Cohen, S ; Ellis, R S ; Peirani, S ; Windhorst, R A ; O'Connell, R W ; Silk, J ; Whitmore, B C ; Hathi, N P ; Ryan, R E et al.
We study ~330 massive (M* > 10^9.5 MSun), newborn spheroidal galaxies (SGs) around the epoch of peak star formation (1<z<3), to explore the high-redshift origin of SGs and gain insight into when and how the old stellar populations that dominate today's Universe formed. [...]
arXiv:1206.2360.
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2012.
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74.
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The Intense Starburst HDF850.1 in a Galaxy Overdensity at z=5.2 in the Hubble Deep Field
/ Walter, Fabian ; Decarli, R ; Carilli, C ; Bertoldi, F ; Cox, P ; Da Cunha, E ; Daddi, E ; Dickinson, M ; Downes, D ; Elbaz, D et al.
The Hubble Deep Field (HDF) is a region in the sky that provides one of the deepest multi-wavelength views of the distant universe and has led to the detection of thousands of galaxies seen throughout cosmic time. [...]
arXiv:1206.2641.
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2012.
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75.
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An Upgraded ATLAS Central Trigger for 2014 Luminosities
/ Anders, G ; Berge, D ; Bertelsen, H ; Childers, T ; Dam, M ; Dobson, E ; Ellis, N ; Farthouat, P ; Gabaldon, C ; Gorini, B et al.
During 2011, the LHC reached instantaneous luminosities of 4*10^33 cm-2*s-1 and produced events with up to 24 interactions per colliding proton bunch. This places stringent operational and physical requirements on the ATLAS Trigger in order to reduce the 40MHz collision rate to a manageable event storage rate of ~400Hz and, at the same time, selecting those events considered interesting. [...]
ATL-DAQ-SLIDE-2012-402.-
Geneva : CERN, 2012 - 1 p.
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
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76.
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Outstanding questions: physics beyond the Standard Model
/ Ellis, John (CERN ; King's Coll. London)
The Standard Model of particle physics agrees very well with experiment, but many important questions remain unanswered, among them are the following. What is the origin of particle masses and are they due to a Higgs boson? How does one understand the number of species of matter particles and how do they mix? What is the origin of the difference between matter and antimatter, and is it related to the origin of the matter in the Universe? What is the nature of the astrophysical dark matter? How does one unify the fundamental interactions? How does one quantize gravity? In this article, I introduce these questions and discuss how they may be addressed by experiments at the Large Hadron Collider, with particular attention to the search for the Higgs boson and supersymmetry..
2012
- Published in : Phil. Trans. R. Soc. A 370 (2012) 818-830
In : Physics at the high-energy frontier - the Large Hadron Collider project, London, United Kingdom, 16 - 17 May 2011, pp.818-830
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79.
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Suppression of the near-infrared OH night sky lines with fibre Bragg gratings - first results
/ Ellis, S C ; Bland-Hawthorn, J ; Lawrence, J ; Horton, A J ; Trinh, C ; Leon-Saval, S G ; Shortridge, K ; Bryant, J ; Case, S ; Colless, M et al.
The background noise between 1 and 1.8 microns in ground-based instruments is dominated by atmospheric emission from hydroxyl molecules. [...]
arXiv:1206.6551.
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2012.
Preprint
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81.
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Topological and Central Trigger Processor for 2014 LHC luminosities
/ Simioni, E (Mainz U., Inst. Phys.) ; Anders, G (Kirchhoff Inst. Phys.) ; Bauss, B (Mainz U., Inst. Phys.) ; Berge, D (CERN) ; Buscher, V (Mainz U., Inst. Phys.) ; Childers, T (CERN) ; Degele, R (Mainz U., Inst. Phys.) ; Dobson, E (CERN) ; Ebling, A (Mainz U., Inst. Phys.) ; Ellis, N (CERN) et al.
The ATLAS experiment is located at the European Center for Nuclear Research (CERN) in Switzerland. [...]
ATL-DAQ-PROC-2012-041.
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2012. - 5 p.
Original Communication (restricted to ATLAS) - Full text
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84.
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Global Analysis of the Higgs Candidate with Mass ~ 125 GeV
/ Ellis, John (King's Coll. London ; CERN) ; You, Tevong (CERN ; Imperial Coll., London)
We analyze the properties of the Higgs candidate with mass ~ 125 GeV discovered by the CMS and ATLAS Collaborations, constraining the possible deviations of its couplings from those of a Standard Model Higgs boson. The CMS, ATLAS and Tevatron data are compatible with Standard Model couplings to massive gauge bosons and fermions, and disfavour several types of composite Higgs models unless their couplings resemble those in the Standard Model. [...]
arXiv:1207.1693; KCL-PH-TH-2012-28; LCTS-2012-14; CERN-PH-TH-2012-192.-
2012 - 22 p.
- Published in : JHEP 09 (2012) 123
Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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89.
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The ages, masses and star-formation rates of spectroscopically confirmed z~6 galaxies in CANDELS
/ Curtis-Lake, E ; McLure, R J ; Dunlop, J S ; Schenker, M ; Rogers, A B ; Targett, T ; Cirasuolo, M ; Almaini, O ; Ashby, M L N ; Bradshaw, E J et al.
We report the results of a study exploring the stellar populations of 13 luminous (L>L*), spectroscopically confirmed, galaxies in the redshift interval 5.5<z<6.5, all with WFC3/IR and IRAC imaging from the HST/CANDELS and Spitzer/SEDS surveys. [...]
arXiv:1207.2727.
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2012.
Preprint
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92.
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No app for that? Make it yourself!
Pas d'appli pour ça ? Créez-la !
/ CERN Bulletin
Are you passionate about science? Do you like communicating that passion to the general public? Then come along to the very first CERN Summer Student Webfest kicking off on Friday 3 August! The Webfest is a grassroots initiative by the summer students, seeking to spark new ideas that could innovate the future of web-based education about CERN, the LHC and particle physics. The CERN Summer Student Webfest is a weekend of online web-based creativity modelled on the gatherings (sometimes called hackfests or hackathons) that energize many open source communities. [...]
BUL-NA-2012-239.-
2012
- Published in : CERN Bulletin 30/2012 31/2012
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98.
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The CMSSM and NUHM1 in Light of 7 TeV LHC, $B_s \to \mu^+\mu^-$ and XENON100 Data
/ Buchmueller, O. (Imperial Coll., London) ; Cavanaugh, R. (Chicago U. ; Fermilab) ; Citron, M. (Imperial Coll., London) ; De Roeck, A. (Antwerp U. ; CERN) ; Dolan, M.J. (Durham U., IPPP) ; Ellis, J.R. (CERN ; King's Coll. London) ; Flacher, H. (Bristol U.) ; Heinemeyer, S. (Cantabria Inst. of Phys.) ; Isidori, G. (CERN ; INFN, Italy) ; Marrouche, J. (Imperial Coll., London) et al.
We make a frequentist analysis of the parameter space of the CMSSM and NUHM1, using a Markov Chain Monte Carlo (MCMC) with 95 (221) million points to sample the CMSSM (NUHM1) parameter spaces. Our analysis includes the ATLAS search for supersymmetric jets + MET signals using ~ 5/fb of LHC data at 7 TeV, which we apply using PYTHIA and a Delphes implementation that we validate in the relevant parameter regions of the CMSSM and NUHM1. [...]
KCL-PH-TH-2012-26; LCTS-2012-13; CERN-PH-TH-2012-164; DCPT-12-82; DESY-12-115; IPPP-12-41; FTPI-MINN-12-20; UMN-TH-3106-12; FERMILAB-PUB-12-868-T; arXiv:1207.7315; KCL-PH-TH-2012-26; LCTS-2012-13; CERN-PH-TH-2012-164; DCPT-12-82; DESY 12-115; IPPP-12-41; FTPI-MINN-12-20; UMN-TH-3106-12.-
2012-11-30 - 27 p.
- Published in : Eur. Phys. J. C 72 (2012) 2243
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99.
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LEP3: A High Luminosity $e^+e^-$ Collider to Study the Higgs Boson
/ Blondel, A. (Geneva U.) ; Koratzinos, M. ; Assmann, R.W. (CERN) ; Butterworth, A. (CERN) ; Janot, P. (CERN) ; Jimenez, J.M. (CERN) ; Grojean, C. (CERN) ; Milanese, A. (CERN) ; Modena, M. (CERN) ; Osborne, J.A. (CERN) et al.
A strong candidate for the Standard Model Scalar boson, H(126), has been discovered by the Large Hadron Collider (LHC) experiments. [...]
CERN-ATS-NOTE-2012-062-TECH ; CERN-PH-TH-2012-281 ; FERMILAB-TM-2544-APC ; arXiv:1208.0504 ; CERN-ATS-NOTE-2012-062-TECH ; CERN-PH-TH-2012-281.
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2012. - 18 p.
FERMILABTM - SLAC - Preprint
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102.
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Integral field spectroscopy of a sample of nearby galaxies: II. Properties of the H ii regions
/ Sanchez, S F ; Rosales-Ortega, F F ; Marino, R A ; Iglesias-Paramo, J ; Vilchez, J M ; Kennicutt, R C ; Diaz, A I ; Mast, D ; Monreal-Ibero, A ; Garcia-Benito, R et al.
In this work we analyze the spectroscopic properties of a large number of H ii regions, \sim2600, located in 38 galaxies. [...]
arXiv:1208.1117.
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2012.
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104.
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The UV/optical spectra of the type Ia supernova SN 2010jn: A bright supernova with outer layers rich in iron-group elements
/ Hachinger, S ; Mazzali, P A ; Sullivan, M ; Ellis, R ; Maguire, K ; Gal-Yam, A ; Howell, D A ; Nugent, P E ; Baron, E ; Arcavi, I et al.
Radiative transfer studies of Type Ia supernovae (SNe Ia) hold the promise of constraining both the time-dependent density profile of the SN ejecta and its stratification by element abundance which, in turn, may discriminate between different explosion mechanisms and progenitor classes. [...]
arXiv:1208.1267.
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2012.
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117.
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A Fast Track towards the `Higgs' Spin and Parity
/ Ellis, John (King's Coll. London ; CERN) ; Hwang, Dae Sung (Sejong U.) ; Sanz, Veronica (CERN ; York U., Canada) ; You, Tevong (King's Coll. London ; CERN)
The LHC experiments ATLAS and CMS have discovered a new boson that resembles the long-sought Higgs boson: it cannot have spin one, and has couplings to other particles that increase with their masses, but the spin and parity remain to be determined. We show here that the `Higgs' + gauge boson invariant-mass distribution in `Higgs'-strahlung events at the Tevatron or the LHC would be very different under the J^P = 0+, 0- and 2+ hypotheses, and could provide a fast-track indicator of the `Higgs' spin and parity. [...]
arXiv:1208.6002; KCL-PH-TH-2012-38; LCTS-2012-22; CERN-PH-TH-2012-226.-
2012 - 18 p.
- Published in : JHEP 11 (2012) 134
Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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122.
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PT-Symmetric Electronics
/ Schindler, J (Department of Physics, Wesleyan University, USA) ; Lin, Z (Department of Physics, Wesleyan University, USA) ; Lee, J M (Department of Physics, Wesleyan University, USA) ; Ramezani, Hamidreza (Department of Physics, Wesleyan University, USA) ; Ellis, F M (Department of Physics, Wesleyan University, USA) ; Kottos, Tsampikos (Department of Physics, Wesleyan University, USA)
We show both theoretically and experimentally that a pair of inductively coupled active LRC circuits (dimer), one with amplification and another with an equivalent amount of attenuation, display all the features which characterize a wide class of non-Hermitian systems which commute with the joint parity-time PT operator: typical normal modes, temporal evolution, and scattering processes. [...]
arXiv:1209.2347.
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2012.
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125.
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The Upgrade of the ATLAS Level-1 Central Trigger Processor
/ ANDERS, G (Ruprecht-Karls-Universitaet Heidelberg (DE)) ; BERGE, D (CERN) ; BERTELSEN, H (University of Copenhagen (DK)) ; DAM, M (University of Copenhagen (DK)) ; DOBSON, E (CERN) ; ELLIS, N (CERN) ; FARTHOUAT, P (CERN) ; GABALDON RUIZ, C (CERN) ; GHIBAUDI, M (CERN) ; GORINI, B (CERN) et al.
The ATLAS Level-1 Central Trigger Processor (CTP) combines information from calorimeter and muon trigger processors as well as other sources and makes the final Level-1 Accept (L1A) decision. Due to the increasing luminosity of the LHC and the growing demands of physics and monitoring placed on the ATLAS Level-1 trigger system, the current CTP has reached its design limits. [...]
ATL-DAQ-SLIDE-2012-530.-
Geneva : CERN, 2012 - 16 p.
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : Topical Workshop on Electronics for Particle Physics, Oxford, UK, 17 - 21 Sep 2012
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126.
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Hubble Space Telescope H-alpha imaging of star-forming galaxies at z = 1-1.5: evolution in the size and luminosity of giant HII regions
/ Livermore, R C (- ICC, Durham University) ; Jones, T (- Caltech) ; Richard, J (- ICC, Durham University ; - CRAL Observatoire de Lyon) ; Bower, R G (- ICC, Durham University) ; Ellis, R S (- Caltech) ; Swinbank, A M (- ICC, Durham University) ; Rigby, J R (- NASA Goddard Space Flight Center) ; Smail, Ian (- ICC, Durham University) ; Ebeling, H (- IfA, University of Hawaii) ; Crain, R A (- Leiden Observatory)
We present HST/WFC3 narrowband imaging of the H-alpha emission in a sample of eight gravitationally-lensed galaxies at z = 1 - 1.5. [...]
arXiv:1209.5741.
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2012.
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127.
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An upgraded ATLAS Central Trigger for post-2014 LHC luminosities
/ Anders, G (CERN ; Heidelberg U.) ; Berge, D (CERN) ; Bertelsen, H (Bohr Inst.) ; Childers, T (CERN) ; Dam, M (Bohr Inst.) ; Dobson, E (CERN) ; Ellis, N (CERN) ; Farthouat, P (CERN) ; Gabaldon, C (CERN) ; Gorini, B (CERN) et al.
During 2011, the LHC reached instantaneous luminosities of 6.7 · 10^33 cm−2s−1 and produced events with up to 40 interactions per colliding proton bunch. [...]
ATL-DAQ-PROC-2012-049.
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2012.
Original Communication (restricted to ATLAS) - Full text
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129.
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La Silla-QUEST Variability Survey in the Southern Hemisphere
/ Hadjiyska, Ellie ; Rabinowitz, David ; Baltay, Charles ; Ellman, Nancy ; Nugent, Peter ; Zinn, Robert ; Horowitz, Benjamin ; McKinnon, Ryan ; Miller, Lissa R
We describe the La Silla-QUEST (LSQ) Variability Survey. LSQ is a dedicated wide-field synoptic survey in the Southern Hemisphere, focussing on the discovery and study of transients ranging from low redshift (z < 0.1) SN Ia, Tidal Disruption events, RR Lyr{\ae} variables, CVs, Quasars, TNOs and others. [...]
arXiv:1210.1584.-
2012
- Published in : New Horizons in Time-Domain Astronomy, Proceedings of the International Astronomical Union, IAU Symposium, Volume 285, 2011, p. 324-326
External link: Preprint
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132.
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Prime Focus Spectrograph - Subaru's future -
/ Sugai, Hajime ; Karoji, Hiroshi ; Takato, Naruhisa ; Tamura, Naoyuki ; Shimono, Atsushi ; Ohyama, Youichi ; Ueda, Akitoshi ; Ling, Hung-Hsu ; de Arruda, Marcio Vital ; Barkhouser, Robert H et al.
The Prime Focus Spectrograph (PFS) of the Subaru Measurement of Images and Redshifts (SuMIRe) project has been endorsed by Japanese community as one of the main future instruments of the Subaru 8.2-meter telescope at Mauna Kea, Hawaii. [...]
arXiv:1210.2719.
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2012.
Preprint
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133.
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2013 CERN - Latin-American School of High-Energy Physics : Arequipa, Peru 6 - 19 Mar 2013
7th CERN - Latin-American School of High-Energy Physics - CLASHEP 2013 CLASHEP2013
6 - 19 Mar 2013
- Arequipa, Peru
/ Mulders, M. (ed.) (CERN); Perez, G. (ed.) (CERN)
The CERN–Latin-American School of High-Energy Physics is intended to give young physicists an introduction to the theoretical aspects of recent advances in elementary particle physics. These proceedings contain lecture notes on the Standard Model of electroweak interactions, quantum chromodynamics, flavour physics, quantum chromodynamics under extreme conditions, cosmic-ray physics, cosmology, recent highlights of LHC results, practical statistics for particle physicists and a short introduction to the principles of particle physics instrumentation..
Geneva : CERN, 2015 - 372 p.
arXiv:1605.00784 .- CERN-2015-001 .- CERN-2015-001
- Published in : 10.5170/CERN-2015-001
e-proceedings
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137.
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Distinguishing 'Higgs' spin hypotheses using $\gamma \gamma$ and $W W^*$ decays
/ Ellis, John (King's Coll. London ; CERN) ; Fok, Ricky (York U., Canada) ; Hwang, Dae Sung (Sejong U.) ; Sanz, Veronica (CERN ; York U., Canada) ; You, Tevong (King's Coll. London)
The new particle X recently discovered by the ATLAS and CMS Collaborations in searches for the Higgs boson has been observed to decay into gamma gamma, ZZ* and WW*, but its spin and parity, J^P, remain a mystery, with J^P = 0^+ and 2^+ being open possibilities. We use PYTHIA and Delphes to simulate an analysis of the angular distribution of gg to X to gamma gamma decays in a full 2012 data set, including realistic background levels. [...]
arXiv:1210.5229; KCL-PH-TH-2012-44; LCTS-2012-29; CERN-PH-TH-2012-268.-
2013 - 27 p.
- Published in : Eur. Phys. J. C 73 (2013) 2488
Fulltext: PDF; External link: Preprint
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145.
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First Science with SAMI: A Serendipitously Discovered Galactic Wind in ESO 185-G031
/ Fogarty, Lisa M R ; Bland-Hawthorn, Joss ; Croom, Scott M ; Green, Andrew W ; Bryant, Julia J ; Lawrence, Jon S ; Richards, Samuel ; Allen, James T ; Bauer, Amanda E ; Birchall, Michael N et al.
We present the first scientific results from the Sydney-AAO Multi-Object IFS (SAMI) at the Anglo-Australian Telescope. [...]
arXiv:1211.0352.
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2012.
Preprint
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149.
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The Higgs Symposium
9 - 11 Jan 2013
- Edinburgh, UK
.-
The Higgs Symposium, organized by the Higgs Centre, and co-sponsored by the IPPP, will take place at the University of Edinburgh, 9-11 January 2013. The Symposium will consist of 12 plenary lectures, focused on the discovery of the Higgs boson and its impact on physics. [...]
2013
Conference home page
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152.
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The Abundance of Star-Forming Galaxies in the Redshift Range 8.5 to 12: New Results from the 2012 Hubble Ultra Deep Field Campaign
/ Ellis, Richard S ; McLure, Ross J ; Dunlop, James S ; Robertson, Brant E ; Ono, Yoshiaki ; Schenker, Matthew A ; Koekemoer, Anton ; Bowler, Rebecca A A ; Ouchi, Masami ; Rogers, Alexander B et al.
We present the results of the deepest search to date for star-forming galaxies beyond a redshift z~8.5 utilizing a new sequence of near-infrared Wide Field Camera 3 images of the Hubble Ultra Deep Field. [...]
arXiv:1211.6804.
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2012.
Preprint
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156.
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The UV continua and inferred stellar populations of galaxies at z ~ 7 - 9 revealed by the Hubble Ultra Deep Field 2012 campaign
/ Dunlop, J S ; Rogers, A B ; McLure, R J ; Ellis, R S ; Robertson, B E ; Koekemoer, A ; Dayal, P ; Curtis-Lake, E ; Wild, V ; Charlot, S et al.
We use the new ultra-deep, near-infrared imaging of the Hubble Ultra-Deep Field (HUDF) provided by our UDF12 HST WFC3/IR campaign to explore the rest-frame UV properties of galaxies at redshifts z > 6.5. [...]
arXiv:1212.0860.
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2012.
Preprint
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158.
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GNOSIS: the first instrument to use fibre Bragg gratings for OH suppression
/ Trinh, Christopher Q ; Ellis, Simon C ; Bland-Hawthorn, Joss ; Lawrence, Jon S ; Horton, Anthony J ; Leon-Saval, Sergio G ; Shortridge, Keith ; Bryant, Julia ; Case, Scott ; Colless, Matthew et al.
GNOSIS is a prototype astrophotonic instrument that utilizes OH suppression fibres consisting of fibre Bragg gratings and photonic lanterns to suppress the 103 brightest atmospheric emission doublets between 1.47-1.7 microns. [...]
arXiv:1212.1201.
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2012.
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159.
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The 2012 Hubble Ultra Deep Field (UDF12): Observational Overview
/ Koekemoer, Anton M ; Ellis, Richard S ; McLure, Ross J ; Dunlop, James S ; Robertson, Brant E ; Ono, Yoshiaki ; Schenker, Matthew A ; Ouchi, Masami ; Bowler, Rebecca A A ; Rogers, Alexander B et al.
We present the 2012 Hubble Ultra Deep Field campaign (UDF12), a large 128-orbit Cycle 19 \HST\ program aimed at extending previous WFC3/IR observations of the UDF by quadrupling the exposure time in the F105W filter, imaging in an additional F140W filter, and extending the F160W exposure time by 50%. [...]
arXiv:1212.1448.
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2012.
Preprint
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161.
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The Physics Prospects for CLIC
/ ELLIS, J.
/CERN Linear Collider Detector collaboration
Following a brief outline of the CLIC project, this talk summarizes some of the principal motivations for an e+e− collider with ECM = 3 TeV. It is shown by several examples that CLIC would represent a significant step beyond the LHC and ILC in its capabilities for precision measurements at high energies. [...]
LCD-Note-2008-002.-
Geneva : CERN, 2008
Fulltext: PDF;
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162.
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End of the CMSSM coannihilation strip is nigh
/ Citron, M. (Imperial Coll., London) ; Ellis, J. (King's Coll. London ; CERN) ; Luo, F. (King's Coll. London) ; Marrouche, J. (Imperial Coll., London) ; Olive, K.A. (Minnesota U. ; Minnesota U., Theor. Phys. Inst.) ; de Vries, K.J. (Imperial Coll., London)
A recent global fit to the CMSSM incorporating current constraints on supersymmetry, including missing transverse energy searches at the LHC, BR(B_s to mu+ mu-) and the direct XENON100 search for dark matter, favours points towards the end of the stau-neutralino (stau_1- chi) coannihilation strip with relatively large m_1/2 and 10 < tan beta < 40 and points in the H/A rapid-annihilation funnel with tan beta ~ 50. The coannihilation points typically have m_stau_1-m_chi < 5 GeV, and a significant fraction, including the most-favoured point, has m_stau_1-m_chi < m_tau. [...]
arXiv:1212.2886; KCL-PH-TH-2012-46; LCTS-2012-32; CERN-PH-TH-2012-331; UMN-TH-3127-12; FTPI-MINN-12-38; UMN--TH--3127-12; FTPI--MINN--12-38; KCL-PH-TH-2012-46; LCTS-2012-32; CERN-PH-TH-2012-331; UMN--TH--3127-12; FTPI--MINN--12-38.-
2013-02-22 - 18 p.
- Published in : Phys. Rev. D 87 (2013) 036012
APS Published version, local copy: PDF; Fulltext: PDF; External link: Preprint
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163.
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EDUCATION AND OUTREACH
/ D. Barney
An estimated audience of a billion people! An incredible statement that summarises the extent to which the discovery of the Higgs-like boson announced on 4 July reached the world. From regional newspapers to worldwide journals and television/radio programmes, news spread fast and wide: this was probably the biggest scientific news item in history. [...]
CMSBUL-ARTICLE-2012-057.-
2012
- Published in : , no. 3/2012, pp. 19
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164.
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Evolution of the Sizes of Galaxies over 7
/ Ono, Yoshiaki ; Ouchi, Masami ; Curtis-Lake, Emma ; Schenker, Matthew A ; Ellis, Richard S ; McLure, Ross J ; Dunlop, James S ; Robertson, Brant E ; Koekemoer, Anton M ; Bowler, Rebecca A A et al.
We analyze the redshift- and luminosity-dependent sizes of dropout galaxy candidates in the redshift range z~7-12 using deep images from the UDF12 campaign, data which offers two distinct advantages over that used in earlier work [...]
arXiv:1212.3869.
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2012.
Preprint
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165.
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The Higgs Mass beyond the CMSSM
/ Ellis, John (King's Coll. London ; CERN) ; Luo, Feng (King's Coll. London) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Sandick, Pearl (Utah U.)
The apparent discovery of a Higgs boson with mass ~125 GeV has had a significant impact on the constrained minimal supersymmetric extension of the Standard Model in which the scalar masses, gaugino masses and tri-linear A-terms are assumed to be universal at the GUT scale (the CMSSM). Much of the low-mass parameter space in the CMSSM has been excluded by supersymmetric particle searches at the LHC as well as by the Higgs mass measurement and the emergent signal for B_s to mu^+ mu^-. [...]
KCL-PH-TH-2012-47; LCTS-2012-33; CERN-PH-TH-2012-343; FTPI-MINN-12-39; arXiv:1212.4476; UMN-TH-3128-12; KCL-PH-TH-2012-47; LCTS-2012-33; CERN-PH-TH-2012-343; UMN-TH-3128-12; FTPI-MINN-12-39.-
2013-04-23 - 28 p.
- Published in : Eur. Phys. J. C 73 (2013) 2403
Preprint: PDF; External link: Preprint
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167.
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New Constraints on Cosmic Reionization from the 2012 Hubble Ultra Deep Field Campaign
/ Robertson, Brant E (Arizona) ; Furlanetto, Steven R ; Schneider, Evan ; Charlot, Stephane ; Ellis, Richard S ; Stark, Daniel P ; McLure, Ross J ; Dunlop, James S ; Koekemoer, Anton ; Schenker, Matthew A et al.
Understanding cosmic reionization requires the identification and characterization of early sources of hydrogen-ionizing photons. [...]
arXiv:1301.1228.
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2013.
Preprint
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171.
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Measurement of hard double-parton interactions in $W(\to l\nu)$+ 2 jet events at $\sqrt{s}$=7 TeV with the ATLAS detector
/ ATLAS Collaboration
The production of W bosons in association with two jets in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}$=7 TeV has been analysed for the presence of double-parton interactions using data corresponding to an integrated luminosity of 36/pb, collected with the ATLAS detector at the LHC. The fraction of events arising from double-parton interactions, $f_{DP}^{(D)}$ has been measured through the momentum balance between the two jets and amounts to $f_{DP}^{(D)} = 0.08 \pm 0.01 (stat.) \pm 0.02 (sys.)$ for jets with transverse momentum PT > 20 GeV and rapidity |y|<2.8. [...]
arXiv:1301.6872; CERN-PH-EP-2012-355; CERN-PH-EP-2012-355.-
Geneva : CERN, 2013-03-25 - 23 p.
- Published in : New J. Phys. 15 (2013) 033038
Fulltext: njp13_3_033038 - PDF; arXiv:1301.6872 - PDF; IOP Open Access article: PDF; External link: Rivet analyses reference
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173.
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Galaxy And Mass Assembly (GAMA): Spectroscopic analysis
/ Hopkins, A M (Australian Astronomical Observatory) ; Driver, S P (International Centre for Radio Astronomy Research Australia ; University of St Andrews) ; Brough, S (Australian Astronomical Observatory) ; Owers, M S (Australian Astronomical Observatory) ; Bauer, A E (Australian Astronomical Observatory) ; Gunawardhana, M L P (Australian Astronomical Observatory ; University of Sydney) ; Cluver, M E (Australian Astronomical Observatory) ; Colless, M (Australian Astronomical Observatory) ; Foster, C (European Southern Observatory) ; Lara-Lopez, M A (Australian Astronomical Observatory) et al.
The Galaxy And Mass Assembly (GAMA) survey is a multiwavelength photometric and spectroscopic survey, using the AAOmega spectrograph on the Anglo-Australian Telescope to obtain spectra for up to ~300000 galaxies over 280 square degrees, to a limiting magnitude of r_pet < 19.8 mag. [...]
arXiv:1301.7127.
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2013.
Preprint
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174.
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Observation of Asymmetric Transport in Structures with Active Nonlinearities
/ Bender, N (Department of Physics, Wesleyan University) ; Factor, S (Department of Physics, Wesleyan University) ; Bodyfelt, J D (Department of Physics, Wesleyan University) ; Ramezani, H (Department of Physics, Wesleyan University) ; Ellis, F M (Department of Physics, Wesleyan University) ; Kottos, T (Department of Physics, Wesleyan University)
A mechanism for asymmetric transport based on the interplay between the fundamental symmetries of parity (P) and time (T) with nonlinearity is presented. [...]
arXiv:1301.7337.
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2013.
Preprint
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176.
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The CASSOWARY spectroscopy survey: A new sample of gravitationally lensed galaxies in SDSS
/ Stark, Daniel P ; Auger, Matthew ; Belokurov, Vasily ; Jones, Tucker ; Robertson, Brant E ; Ellis, Richard S ; Sand, David J ; Moiseev, Alexei ; Eagle, Will ; Myers, Thomas
Bright gravitationally lensed galaxies provide our most detailed view of galaxies at high redshift. [...]
arXiv:1302.2663.
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2013.
Preprint
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181.
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LHC Missing-Transverse-Energy Constraints on Models with Universal Extra Dimensions
/ Cacciapaglia, Giacomo (Lyon U. ; King's Coll. London) ; Deandrea, Aldo (Lyon U.) ; Ellis, John (CERN ; King's Coll. London) ; Marrouche, Jad (Imperial Coll., London) ; Panizzi, Luca (Southampton U.)
We consider the performance of the ATLAS and CMS searches for events with missing transverse energy, which were originally motivated by supersymmetry, in constraining extensions of the Standard Model based on extra dimensions, in which the mass differences between recurrences at the same level are generically smaller than the mass hierarchies in typical supersymmetric models. We consider first a toy model with pair-production of a single vector-like quark U1 decaying into a spin-zero stable particle A1 and jet, exploring the sensitivity of the CMS alphaT and ATLAS meff analysis to U1 mass and the U1-A1 mass difference. [...]
arXiv:1302.4750; KCL-PH-TH-2013-05; LCTS-2013-02; CERN-PH-TH-2013-015; SHEP-13-06; KCL-PH-TH-2013-05; LCTS-2013-02; CERN-PH-TH-2013-015.-
2013-04-05 - 18 p.
- Published in : Phys. Rev. D 87 (2013) 075006
APS published version, local copy: PDF; Fulltext: PDF; External link: Preprint
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185.
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Associated Production Evidence against Higgs Impostors and Anomalous Couplings
/ Ellis, John (King's Coll. London ; CERN) ; Sanz, Veronica (York U., Canada ; Sussex U.) ; You, Tevong (King's Coll. London)
There is still no proof that the new particle $X$ recently discovered by the ATLAS and CMS Collaborations indeed has spin zero and positive parity, as confidently expected. We show here that the energy dependence of associated $W/Z + X$ production would be much less for a $J^P = 0^+$ boson with minimal couplings, such as the Higgs boson of the Standard Model, than for a spin-two particle with graviton-like couplings or a spin-zero boson with non-minimal couplings. [...]
arXiv:1303.0208; KCL-PH-TH-2013-06; LCTS-2013-03; CERN-PH-TH-2013-017.-
2013 - 15 p.
- Published in : Eur. Phys. J. C 73 (2013) 2507
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190.
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Updated Global Analysis of Higgs Couplings
/ Ellis, John (King's Coll. London ; CERN) ; You, Tevong (King's Coll. London)
There are many indirect and direct experimental indications that the new particle H discovered by the ATLAS and CMS Collaborations has spin zero and (mostly) positive parity, and that its couplings to other particles are correlated with their masses. Beyond any reasonable doubt, it is a Higgs boson, and here we examine the extent to which its couplings resemble those of the single Higgs boson of the Standard Model. [...]
arXiv:1303.3879; KCL-PH-TH-2013-10; LCTS-2013-05; CERN-PH-TH-2013-050; KCL-PH-TH-2013-10; LCTS-2013-05; CERN-PH-TH-2013-050.-
2013 - 20 p.
- Published in : JHEP 06 (2013) 103
Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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194.
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Wess-Zumino Inflation in Light of Planck
/ Croon, Djuna (King's Coll. London) ; Ellis, John (King's Coll. London ; CERN) ; Mavromatos, Nick E. (King's Coll. London ; CERN)
We discuss cosmological inflation in the minimal Wess-Zumino model with a single massive chiral supermultiplet. With suitable parameters and assuming a plausible initial condition at the start of the inflationary epoch, the model can yield scalar perturbations in the Cosmic Microwave Background (CMB) of the correct strength with a spectral index n_s ~ 0.96 and a tensor-to-scalar perturbation ratio r < 0.1, consistent with the Planck CMB data. [...]
arXiv:1303.6253; KCL-PH-TH-2013-11; LCTS-2013-06; CERN-PH-TH-2013-057; KCL-PH-TH-2013-11; LCTS-2013-06; CERN-PH-TH-2013-057.-
2013-07-09 - 5 p.
- Published in : Phys. Lett. B 72 (2013) 165
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196.
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Aperture corrections for disk galaxy properties derived from the CALIFA survey. Balmer emission lines in spiral galaxies
/ Iglesias-Páramo, J ; Vílchez, J M ; Galbany, L ; Sánchez, S F ; Rosales-Ortega, F F ; Mast, D ; García-Benito, R ; Husemann, B ; Aguerri, J A L ; Alves, J et al.
This work investigates the effect of the aperture size on derived galaxy properties for which we have spatially-resolved optical spectra. [...]
arXiv:1304.1644.
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2013.
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202.
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Hubble Space Telescope spectra of the type Ia supernova SN 2011fe: A low-energy delayed detonation of a white dwarf with Z
/ Mazzali, Paolo ; Sullivan, Mark ; Hachinger, Stephan ; Ellis, Richard ; Nugent, Peter E ; Howell, D Andrew ; Gal-Yam, Avishay ; Maguire, Kate ; Cooke, Jeff ; Thomas, Rollin
Hubble Space Telescope spectroscopic observations of the nearby type Ia supernova (SN Ia) SN 2011fe, taken on 10 epochs from -13.5 to +41 days relative to B-band maximum light, and spanning the far-ultraviolet (UV) to the near-infrared (IR) are presented. [...]
arXiv:1305.2356.
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2013.
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209.
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Gravitational lensing shear by an exotic lens object with negative convergence or negative mass
/ Izumi, Koji ; Hagiwara, Chisaki ; Nakajima, Koki ; Kitamura, Takao ; Asada, Hideki
Gravitational lens models with negative convergence (surface mass density projected onto the lens plane) inspired by modified gravity theories, exotic matter and energy have been recently discussed in such a way that a static and spherically-symmetric modified spacetime metric depends on the inverse distance to the power of positive $n$ (n=1 for Schwarzschild metric, n=2 for Ellis wormhole) in the weak-field approximation [Kitamura, Nakajima and Asada, PRD 87, 027501 (2013)], and it has been shown that demagnification of images could occur for $n>1$ lens models associated with exotic matter (and energy), though they cause the gravitational pull on light rays. [...]
arXiv:1305.5037.
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2013. - 14 p.
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211.
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TLEP: A High-Performance Circular $e^+ e^-$ Collider to Study the Higgs Boson
/ Koratzinos, M (Geneva U.) ; Blondel, A P (Geneva U.) ; Aleksan, R (Saclay) ; Brunner, O (CERN) ; Butterworth, A ; Janot, P (CERN) ; Jensen, E (CERN) ; Osborne, J (CERN) ; Zimmermann, F (CERN) ; Ellis, J R (King's Coll. London) et al.
The recent discovery of a light Higgs boson has opened up considerable interest in circular $e^+e^-$ Higgs factories around the world. [...]
arXiv:1305.6498.
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2013. - 3 p.
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212.
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The ATLAS Trigger/DAQ Authorlist
/ Abreu, R (CERN) ; Achenbach, R ; Aielli, G ; Aleksandrov, I N ; Alexandrov, E ; Allbrooke, B ; Aloisio, A ; Alonso, F ; Alvarez Gonzalez, B ; Alviggi, M G et al.
This is the ATLAS Trigger/DAQ Authorlist, version 13.05 (May 30, 2013)..
ATL-DAQ-PUB-2013-001.
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2013. - 4 p.
Original Communication (restricted to ATLAS) - Full text
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214.
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Characterisation of the muon beams for the Muon Ionisation Cooling Experiment
/ MICE Collaboration
A novel single-particle technique to measure emittance has been developed and used to characterise seventeen different muon beams for the Muon Ionisation Cooling Experiment (MICE). The muon beams, whose mean momenta vary from 171 to 281 MeV/c, have emittances of approximately 1.5--2.3 \pi mm-rad horizontally and 0.6--1.0 \pi mm-rad vertically, a horizontal dispersion of 90--190 mm and momentum spreads of about 25 MeV/c. [...]
arXiv:1306.1509.-
2013 - 20 p.
- Published in : Eur. Phys. J. C 73 (2013) 2582
External link: Preprint
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215.
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TLEP: A High-Performance Circular e+e- Collider to Study the Higgs Boson
/ Koratzinos, M (U Geneva) ; Blondel, A P (U Geneva) ; Aleksan, R (CEA/Saclay France) ; Brunner, O (CERN) ; Butterworth, A (CERN) ; Janot, P (CERN) ; Jensen, E (CERN) ; Osborne, J (CERN) ; Zimmermann, F (CERN) ; Ellis, J R (King's College London and CERN) et al.
WP: 4: AccNet: Accelerator Science Networks
Task: 4.2: EuroLumi
The recent discovery of a light Higgs boson has opened up considerable interest in circular e+e- Higgs factories around the world [...]
EuCARD-CON-2013-013.
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2013.
Access to fulltext document
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217.
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The Trace-Free Einstein Equations and inflation
/ Ellis, George F R
The trace-free version of the Einstein Gravitational equations, essentially equivalent to unimodular gravity, can solve the troubling issue of the huge discrepancy between quantum field theory estimates of the vacuum energy density and the astronomically observed value of the cosmological constant. [...]
arXiv:1306.3021.
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2013. - 10 p.
Preprint
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220.
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TLEP, first step in a long-term vision for HEP
/ Koratzinos, M. (Geneva U.) ; Blondel, A.P. (Geneva U.) ; Aleksan, R. (Saclay) ; Janot, P. (CERN) ; Zimmermann, F. (CERN) ; Ellis, J.R. (King's Coll. London) ; Zanetti, M. (MIT)
The discovery of H(126) has renewed interest in circular e+e- colliders that can operate as Higgs factories, which benefit from three unique characteristics: i) high luminosity and reliability, ii) the availability of several interaction points, iii) superior beam energy accuracy. [...]
arXiv:1306.5981.
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2013. - 6 p.
Preprint - Preprint
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222.
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The ATLAS Level-1 Calorimeter Trigger: PreProcessor implementation and performance
/ Asman, B (Stockholm U.) ; Achenbach, R (Kirchhoff Inst. Phys.) ; Allbrooke, B M M (Birmingham U.) ; Anders, G (Kirchhoff Inst. Phys.) ; Andrei, V (Kirchhoff Inst. Phys.) ; Buscher, V (Mainz U., Inst. Phys.) ; Bansil, H S (Birmingham U.) ; Barnett, B M (Rutherford) ; Bauss, B (Mainz U., Inst. Phys.) ; Bendtz, K (Stockholm U.) et al.
The PreProcessor system of the ATLAS Level-1 Calorimeter Trigger (L1Calo) receives about 7200 analogue signals from the electromagnetic and hadronic components of the calorimetric detector system. Lateral division results in cells which are pre-summed to so-called Trigger Towers of size 0.1 × 0.1 along azimuth (phi) and pseudorapidity (η). [...]
2012
- Published in : JINST 7 (2012) P12008
IOP Open Access article: PDF;
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224.
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Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC
/ ATLAS Collaboration
Measurements are presented of production properties and couplings of the recently discovered Higgs boson using the decays into boson pairs, $H \to \gamma\gamma, H \to ZZ* \to 4l$ and $H \to WW* \to l\nu l\nu$. The results are based on the complete pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at centre-of-mass energies of $\sqrt{s}$=7 and $\sqrt{s}$=8 TeV, corresponding to an integrated luminosity of about 25 fb$^{-1}$. [...]
arXiv:1307.1427; CERN-PH-EP-2013-103; CERN-PH-EP-2013-103.-
Geneva : CERN, 2013-10-07 - 32 p.
Article from SCOAP3: PDF; Corrigendum: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; External links: Preprint; Previous draft version
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225.
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Evidence for the spin-0 nature of the Higgs boson using ATLAS data
/ ATLAS Collaboration
Studies of the spin and parity quantum numbers of the Higgs boson are presented, based on proton-proton collision data collected by the ATLAS experiment at the LHC. The Standard Model spin-parity $J^P = 0^+$ hypothesis is compared with alternative hypotheses using the Higgs boson decays $H \to \gamma\gamma, H \to ZZ^* \to 4$ leptons and $H \to WW^* \to l\nu l\nu$, as well as the combination of these channels. [...]
arXiv:1307.1432; CERN-PH-EP-2013-102; CERN-PH-EP-2013-102.-
Geneva : CERN, 2013-10-07 - 25 p.
- Published in : Phys. Lett. B 726 (2013) 120-144
Elsevier Open Access article: PDF; Fulltext: PDF; External links: Preprint; Previous draft version
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226.
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Starobinsky-like Inflationary Models as Avatars of No-Scale Supergravity
/ Ellis, John (King's Coll. London ; CERN) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
Models of cosmological inflation resembling the Starobinsky R + R^2 model emerge naturally among the effective potentials derived from no-scale SU(N,1)/SU(N) x U(1) supergravity when N > 1. We display several examples in the SU(2,1)/SU(2) x U(1) case, in which the inflaton may be identified with either a modulus field or a matter field. [...]
KCL-PH-TH-2013-13; LCTS-2013-22; CERN-PH-TH-2013-156; ACT-6-13; UMN-TH-3213-13; FTPI-MINN-13-23; arXiv:1307.3537; MIFPA-13-22; KCL-PH-TH-2013-13; LCTS-2013-22; CERN-PH-TH-2013-156; ACT-6-13; MIFPA-13-22; UMN-TH-3213-13; FTPI-MINN-13-23.-
2013 - 23 p.
- Published in : JCAP 10 (2013) 009
Preprint: PDF; External link: Preprint
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228.
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Hangout with CERN: All about SUSY (S03E09)
Produced by: Kahle, Kate
Director: Rao, Achintya
00:35:29.700 / 20 June 2013 / © 2013-2020 CERN
Keywords: askCERN, Hangout, Hangoutsonair, HangoutWithCERN, LHC, Particle physics, Physics, Science, Scienceeveryday
Reference: CERN-MOVIE-2013-098-001
Language: English
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230.
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CERN Webfest: A weekend for science on the web
Webfest du CERN : un weekend consacré à la science sur le web
/ CERN Bulletin
Are you passionate about science? Do you like communicating that passion to the general public? Then come along to the CERN Summer Student Webfest on the weekend of 3-4 August! It is a grassroots initiative by the summer students, open to all staff and users, and aims to spark new ideas that could innovate the future of web-based education about CERN, the LHC and particle physics. The CERN Summer Student Webfest is a weekend of online web-based creativity modelled on the gatherings (sometimes called hackfests or hackathons) that energize many open-source communities. [...]
BUL-EV-2013-050.-
2013
- Published in : CERN Bulletin 31/2013 32/2013
Fulltext: JPG;
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233.
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Microlensed image centroid motions by an exotic lens object with negative convergence or negative mass
/ Kitamura, Takao ; Izumi, Koji ; Nakajima, Koki ; Hagiwara, Chisaki ; Asada, Hideki
Gravitational lens models with negative convergence (surface mass density projected onto the lens plane) inspired by modified gravity theories, exotic matter and energy have been recently examined to discuss possible demagnification of images and gravitational lensing shear, in such a way that a static and spherically symmetric modified spacetime metric depends on the inverse distance to the power of positive $n$ ($n=1$ for Schwarzschild metric, $n=2$ for Ellis wormhole) in the weak-field approximation [Kitamura, Nakajima and Asada, PRD 87, 027501 (2013), Izumi et al. [...]
arXiv:1307.6637.
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2013. - 21 p.
Preprint
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234.
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Contextualizing the global relevance of local land change observations
/ Magliocca, N R (Department of Geography and Environmental Systems, University of Maryland, Baltimore County, Baltimore, Maryland, USA) ; Ellis, E C (Department of Geography and Environmental Systems, University of Maryland, Baltimore County, Baltimore, Maryland, USA) ; Oates, T (Department of Computer Science and Electrical Engineering, University of Maryland, Baltimore County, Baltimore, Maryland, USA) ; Schmill, M (Department of Computer Science and Electrical Engineering, University of Maryland, Baltimore County, Baltimore, Maryland, USA)
To understand global changes in the Earth system, scientists must generalize globally from observations made locally and regionally. [...]
arXiv:1307.6889.
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2013. - 5 p.
Preprint
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241.
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TLEP: A high-Performance Circular $e^{+}e^{-}$ Collider to Study the Higgs Boson
/ Koratzinos, M (Geneva U.) ; Blondel, A P (Geneva U.) ; Aleksan, R (Saclay) ; Brunner, O (CERN) ; Butterworth, A (CERN) ; Janot, P (CERN) ; Jensen, E (CERN) ; Osborne, J (CERN) ; Zimmermann, F (CERN) ; Ellis, J R (King's Coll. London) et al.
The recent discovery of a light Higgs boson has opened up considerable interest in circular $e^+e^-$ Higgs factories around the world. We report on the progress of the TLEP concept since last year. [...]
CERN-ACC-2013-0152; arXiv:1305.6498.-
Geneva : CERN, 2013 - 3 p.
Fulltext: PDF; External link: Preprint
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.1658
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242.
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First Look at the Physics Case of TLEP
/ TLEP Design Study Working Group Collaboration
The discovery by the ATLAS and CMS experiments of a new boson with mass around 125 GeV and with measured properties compatible with those of a Standard-Model Higgs boson, coupled with the absence of discoveries of phenomena beyond the Standard Model at the TeV scale, has triggered interest in ideas for future Higgs factories. A new circular e+e- collider hosted in a 80 to 100 km tunnel, TLEP, is among the most attractive solutions proposed so far. [...]
arXiv:1308.6176.-
Geneva : CERN, 2014-01-29 - 49 p.
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: arXiv:1308.6176 - PDF; CERN-ACC-2016-006 - PDF; Springer Open Access article: PDF; External links: PDF on ECONF; Proceedings write-up on ECONF
In : Community Summer Study 2013 : Snowmass on the Mississippi, Minneapolis, MN, USA, 29 Jul - 6 Aug 2013, pp.164
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243.
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TLEP: A high performance circular e+e- collider to study the Higgs boson
/ Koratzinos, M (U. Geneva) ; Blondel, A (U. Geneva) ; Aleksan, R (CEA) ; Brunner, O (CERN) ; Butterworth, A (CERN) ; Janot, P (CERN) ; Jensen, E (CERN) ; Osborne, J (CERN) ; Zimmermann, F (CERN) ; Ellis, J (King’s College London, CERN) et al.
The recent discovery of a light Higgs boson has opened up considerable interest in circular e+e- Higgs factories around the world. [...]
CERN-ACC-2013-0223.
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2013. - 4 p.
Full text
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249.
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Summary of the Nobel Symposium on LHC Results
/ Ellis, John (King's Coll. London ; CERN)
This is a personal summary of points made during, and arising from the symposium, drawing largely from the talks presented there. The Standard Model is doing fine, including QCD, the electroweak sector and flavour physics. [...]
arXiv:1309.3549; KCL-PH-TH-2013-30; LCTS-2013-21; CERN-PH-TH-2013-218.-
2013 - 18 p.
- Published in : Phys. Scr. T158 (2013) 014020
Royal Swedish Academy of Sciences published version, local copy: PDF; External link: Preprint
In : Nobel Symposium 154: The Higgs Boson Discovery and Other Recent LHC Results, Krusenberg, Uppsala, Sweden, 13 - 17 May 2013, pp.014020
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251.
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Hardware, firmware and software developments for the upgrade of the ATLAS Level-1 Central Trigger Processor
/ Ghibaudi, M (Scuola Superiore Sant'Anna di Studi Universitari e di Perfezionamento Pisa (IT)) ; Haas, S (CERN) ; Spiwoks, R (CERN) ; Anders, G (Ruprecht-Karls-Universitaet Heidelberg (DE)) ; Bertelsen, H (University of Copenhagen (DK)) ; Boisen, A (University of Copenhagen (DK)) ; Childers, T (CERN) ; Dam, M (University of Copenhagen (DK)) ; Ellis, N (CERN) ; Farthouat, P (CERN) et al.
The Central Trigger Processor (CTP) is the final stage of the ATLAS first level trigger system which reduces the collision rate of 40 MHz to a Level-1 event rate of 100 kHz. An upgrade of the CTP is currently underway to significantly increase the number of trigger inputs and trigger combinations, allowing additional flexibility for the trigger menu.\nWe present the hardware and FPGA firmware of the newly designed core module (CTPCORE+) module of the CTP, as well as results from a system used for early firmware and software prototyping based on commercial FPGA evaluation boards. [...]
ATL-DAQ-SLIDE-2013-675.-
Geneva : CERN, 2013 - 20 p.
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
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252.
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Tiled Array of Pixelated CZT Imaging Detectors for ProtoEXIST2 and MIRAX-HXI
/ Hong, Jaesub ; Allen, Branden ; Grindlay, Jonathan ; Rodrigues, Barbara ; Ellis, Jon Robert ; Baker, Robert ; Barthelmy, Scott ; Mao, Peter ; Miyasaka, Hiromasa ; Apple, Jeff
We have assembled a tiled array (220 cm2) of fine pixel (0.6 mm) imaging CZT detectors for a balloon borne wide-field hard X-ray telescope, ProtoEXIST2. [...]
arXiv:1309.6949.
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2013. - 9 p.
Preprint
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271.
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Snowmass 2013 Top quark working group report
/ Agashe, K ; Erbacher, R ; Gerber, C E ; Melnikov, K ; Schwienhorst, R ; Mitov, A ; Vos, M ; Wimpenny, S ; Adelman, J ; Baumgart, M et al.
This report summarizes the work of the Energy Frontier Top Quark working group of the 2013 Community Summer Study (Snowmass)..
arXiv:1311.2028.
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2013.
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283.
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Implications of Improved Higgs Mass Calculations for Supersymmetric Models
/ Buchmueller, O. (Imperial Coll., London) ; Dolan, M.J. (SLAC) ; Ellis, J. (King's Coll. London ; CERN) ; Hahn, T. (Munich, Max Planck Inst.) ; Heinemeyer, S. (Cantabria Inst. of Phys.) ; Hollik, W. (Munich, Max Planck Inst.) ; Marrouche, J. (Imperial Coll., London) ; Olive, K.A. (Minnesota U., Theor. Phys. Inst.) ; Rzehak, H. (Freiburg U.) ; de Vries, K.J. (Imperial Coll., London) et al.
We discuss the allowed parameter spaces of supersymmetric scenarios in light of improved Higgs mass predictions provided by FeynHiggs 2.10.0. The Higgs mass predictions combine Feynman-diagrammatic results with a resummation of leading and subleading logarithmic corrections from the stop/top sector, which yield a significant improvement in the region of large stop masses. [...]
arXiv:1312.5233; KCL-PH-TH-2013-41; LCTS-2013-28; CERN-PH-TH-2013-294; MPP-2013-313; DESY-13-249; FR-PHENO-2013-019; UMN-TH-3315-13; FTPI-MINN-13-42; DESY~13-249; SLAC-PUB-15855; KCL-PH-TH-2013-41; LCTS-2013-28; CERN-PH-TH-2013-294; MPP-2013-313; DESY-13-249; FR-PHENO-2013-019; UMN-TH-3315-13; FTPI-MINN-13-42; SLAC-PUB-15855.-
2014-03-18 - 14 p.
- Published in : Eur. Phys. J. C 74 (2014) 2809
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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284.
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Disentangling Higgs-Top Couplings in Associated Production
/ Ellis, John (CERN ; King's Coll. London) ; Hwang, Dae Sung (Sejong U.) ; Sakurai, Kazuki (King's Coll. London) ; Takeuchi, Michihisa (King's Coll. London)
In the presence of CP violation, the Higgs-top coupling may have both scalar and pseudoscalar components, $\kappa_t$ and ${\tilde \kappa_t}$, which are bounded indirectly but only weakly by the present experimental constraints on the Higgs-gluon-gluon and Higgs-$\gamma$-$\gamma$ couplings, whereas upper limits on electric dipole moments provide strong additional indirect constraints on ${\tilde \kappa_t}$, if the Higgs-electron coupling is similar to that in the Standard Model and there are no cancellations with other contributions. We discuss methods to measure directly the scalar and pseudoscalar Higgs-top couplings by measurements of Higgs production in association with ${\bar t} t$, single $t$ and single ${\bar t}$ at the LHC. [...]
arXiv:1312.5736; KCL-PH-TH-2013-47; LCTS-2013-35; CERN-PH-TH-2013-312; KCL-PH-TH-2013-47; LCTS-2013-35; CERN-PH-TH-2013-312.-
2014 - 19 p.
- Published in : JHEP 04 (2014) 004
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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285.
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A molecular line scan in the Hubble Deep Field North
/ Decarli, R ; Walter, F ; Carilli, C ; Riechers, D ; Cox, P ; Neri, R ; Aravena, M ; Bell, E ; Bertoldi, F ; Colombo, D et al.
We present a molecular line scan in the Hubble Deep Field North (HDF-N) that covers the entire 3mm window (79-115 GHz) using the IRAM Plateau de Bure Interferometer. [...]
arXiv:1312.6364.
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2013.
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290.
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Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
/ Betoule, M ; Kessler, R ; Guy, J ; Mosher, J ; Hardin, D ; Biswas, R ; Astier, P ; El-Hage, P ; Konig, M ; Kuhlmann, S et al.
We present cosmological constraints from a joint analysis of type Ia supernova (SN Ia) observations obtained by the SDSS-II and SNLS collaborations. [...]
arXiv:1401.4064.
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2014. - 30 p.
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299.
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Probing the structure and dynamics of molecular clusters using rotational wavepackets
/ Galinis, Gediminas ; Cacho, Cephise ; Chapman, Richard T ; Ellis, Andrew M ; Lewerenz, Marius ; Luna, Luis G Mendoza ; Minns, Russell S ; Mladenovic, Mirjana ; Rouzée, Arnaud ; Springate, Emma et al.
The chemical and physical properties of molecular clusters can heavily depend on their size, which makes them very attractive for the design of new materials with tailored properties. [...]
arXiv:1402.5401.
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2014. - 5 p.
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309.
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Resurrecting Quadratic Inflation in No-Scale Supergravity in Light of BICEP2
/ Ellis, John (CERN ; King's Coll. London) ; García, Marcos A.G. (Minnesota U.) ; Nanopoulos, Dimitri V. (Athens Academy ; HARC, Woodlands ; Texas A-M) ; Olive, Keith A. (Minnesota U.)
The magnitude of primordial tensor perturbations reported by the BICEP2 experiment is consistent with simple models of chaotic inflation driven by a single scalar field with a power-law potential \propto \phi^n: n \simeq 2, in contrast to the WMAP and Planck results, which favored models resembling the Starobinsky R + R^2 model if running of the scalar spectral index could be neglected. While models of inflation with a quadratic potential may be constructed in simple N=1 supergravity, these constructions are more challenging in no-scale supergravity. [...]
arXiv:1403.7518; KCL-PH-TH-2014-11; LCTS-2014-11; CERN-PH-TH-2014-049; ACT-3-14; FTPI-MINN-14-10; UMN-TH-3332-14; KCL-PH-TH-2014-11; LCTS-2014-11; CERN-PH-TH-2014-049; ACT-3-14; UMN-TH-3332-14; FTPI-MINN-14-10.-
2014 - 27 p.
- Published in : JCAP 05 (2014) 037
Article from SCOAP3: PDF; Fulltext: PDF; IOP Open Access article: PDF; External link: Preprint
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311.
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Sub-diffraction, Volume-confined Polaritons in the Natural Hyperbolic Material, Hexagonal Boron Nitride
/ Caldwell, Joshua D ; Kretinin, Andrey ; Chen, Yiguo ; Giannini, Vincenzo ; Fogler, Michael M ; Francescato, Yan ; Ellis, Chase T ; Tischler, Joseph G ; Woods, Colin R ; Giles, Alexander J et al.
Hyeperbolicity, an ability to simultaneously support metallic and dielectric optical response along orthogonal optical axes, was thought to occur only in metamaterials. [...]
arXiv:1404.0494.
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2014.
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314.
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NANOGrav Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries in Circular Orbits
/ Arzoumanian, Z ; Brazier, A ; Burke-Spolaor, S ; Chamberlin, S J ; Chatterjee, S ; Cordes, J M ; Demorest, P B ; Deng, X ; Dolch, T ; Ellis, J A et al.
The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) project currently observes 43 pulsars using the Green Bank and Arecibo radio telescopes. [...]
arXiv:1404.1267.
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2014. - 21 p.
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317.
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Complete Higgs Sector Constraints on Dimension-6 Operators
/ Ellis, John (King's Coll. London ; CERN) ; Sanz, Veronica (Sussex U.) ; You, Tevong (King's Coll. London ; CERN)
Constraints on the full set of Standard Model dimension-6 operators have previously used triple-gauge couplings to complement the constraints obtainable from Higgs signal strengths. Here we extend previous analyses of the Higgs sector constraints by including information from the associated production of Higgs and massive vector bosons (H+V production), which excludes a direction of limited sensitivity allowed by partial cancellations in the triple-gauge sector measured at LEP. [...]
arXiv:1404.3667; KCL-PH-TH-2014-15; LCTS-2014-14; CERN-PH-TH-2014-061; KCL-PH-TH-2014-15; LCTS-2014-14; CERN-PH-TH-2014-061.-
2014 - 23 p.
- Published in : JHEP 07 (2014) 036
Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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323.
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Closing in on the Tip of the CMSSM Stau Coannihilation Strip
/ Desai, Nishita (U. Heidelberg, ITP) ; Ellis, John (King's Coll. London ; CERN) ; Luo, Feng (King's Coll. London) ; Marrouche, Jad (CERN)
Near the tip of the stau coannihilation strip in the CMSSM with a neutralino LSP, the astrophysical cold dark matter density constraint forces the stau-neutralino mass difference to be small. If this mass difference is smaller than the tau mass, the stau may decay either in the outer part of an LHC detector - the `disappearing track' signature - or be sufficiently long-lived to leave the detector before decaying - the long-lived massive charged-particle signature. [...]
arXiv:1404.5061; KCL-PH-TH-2014-13; LCTS-2014-13; CERN-PH-TH-2014-060; KCL-PH-TH-2014-13; LCTS-2014-13; CERN-PH-TH-2014-060.-
2014 - 18 p.
- Published in : Phys. Rev. D 90 (2014) 055031
Fulltext: PDF; External link: Preprint
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328.
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Astrophysical Shrapnel: Discriminating Among Near-Earth Stellar Explosion Sources of Live Radioactive Isotopes
/ Fry, Brian J. (Illinois U., Urbana, Astron. Dept.) ; Fields, Brian D. (Illinois U., Urbana, Astron. Dept.) ; Ellis, John R. (King's Coll. London ; CERN)
We consider the production and deposition on Earth of isotopes with half-lives in the range 10$^{5}$ to 10$^{8}$ years that might provide signatures of nearby stellar explosions, extending previous analyses of Core-Collapse Supernovae (CCSNe) to include Electron-Capture Supernovae (ECSNe), Super-Asymptotic Giant Branch (SAGBs) stars, Thermonuclear/Type Ia Supernovae (TNSNe), and Kilonovae/Neutron Star Mergers (KNe). We revisit previous estimates of the $^{60}$Fe and $^{26}$Al signatures, and extend these estimates to include $^{244}$Pu and $^{53}$Mn. [...]
arXiv:1405.4310; KCL-PH-TH-2014-16; LCTS-2014-15; CERN-PH-TH-2014-062; KCL-PH-TH-2014-16; LCTS-2014-15; CERN-PH-TH-2014-062.-
2015-02-10 - 38 p.
- Published in : Astrophys. J. 800 (2015) 71
Fulltext: PDF; External link: Preprint
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330.
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The Physics Programme Of The MoEDAL Experiment At The LHC
/ Acharya, B. (King's Coll. London ; ICTP, Trieste) ; Alexandre, J. (King's Coll. London) ; Bernabeu, J. (Valencia U., IFIC) ; Campbell, M. (CERN) ; Cecchini, S. (INFN, Bologna) ; Chwastowski, J. (Cracow, INP) ; De Montigny, M. (Alberta U.) ; Derendarz, D. (Cracow, INP) ; De Roeck, A. (CERN) ; Ellis, J.R. (King's Coll. London ; CERN) et al.
The MoEDAL experiment at Point 8 of the LHC ring is the seventh and newest LHC experiment. It is dedicated to the search for highly ionizing particle avatars of physics beyond the Standard Model, extending significantly the discovery horizon of the LHC. [...]
arXiv:1405.7662; KCL-PH-TH-2014-02; LCTS-2014-02; CERN-PH-TH-2014-021; IFIC-14-16; IMPERIAL-TP-2014-AR-1; KCL-PH-TH/2014-02; LCTS/2014-02; CERN-PH-TH/2014-021; IFIC/14-16,
Imperial/TP/2014/AR/1; KCL-PH-TH-2014-02; LCTS-2014-02; CERN-PH-TH-2014-021; IFIC-14-16; IMPERIAL-TP-2014-AR-1.-
2014 - 92 p.
- Published in : Int. J. Mod. Phys. A 29 (2014) 1430050
Fulltext: arXiv:1405.7662 - PDF; 1405.7662 - PDF; External link: Preprint
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332.
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Arecibo Pulsar Survey Using ALFA. III. Precursor Survey and Population Synthesis
/ Swiggum, J K ; Lorimer, D R ; McLaughlin, M A ; Bates, S D ; Champion, D J ; Ransom, S M ; Lazarus, P ; Brazier, A ; Hessels, J W T ; Nice, D J et al.
The Pulsar Arecibo L-band Feed Array (PALFA) Survey uses the ALFA 7-beam receiver to search both inner and outer Galactic sectors visible from Arecibo ($32^{\circ}\lesssim \ell \lesssim 77^{\circ}$ and $168^{\circ}\lesssim \ell \lesssim 214^{\circ}$) close to the Galactic plane ($|b|\lesssim5^{\circ}$) for pulsars. In this paper we detail a precursor survey of this region with PALFA, which observed a subset of the full region (slightly more restrictive in $\ell$ and $|b|\lesssim1^{\circ}$) and detected 45 pulsars. [...]
arXiv:1405.7953.-
2014 - 10 p.
- Published in : The Astrophysical Journal, 787:137 (10pp), 2014 June 1
External link: Preprint
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339.
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PRAXIS: low thermal emission high efficiency OH suppressed fibre spectrograph
/ Content, Robert ; Bland-Hawthorn, Joss ; Ellis, Simon ; Gers, Luke ; Haynes, Roger ; Horton, Anthony ; Lawrence, Jon ; Leon-Saval, Sergio ; Lindley, Emma ; Min, Seong-Sik et al.
PRAXIS is a second generation instrument that follows on from GNOSIS, which was the first instrument using fibre Bragg gratings for OH background suppression. [...]
arXiv:1407.6438.
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2014.
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341.
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The SAMI Galaxy Survey: instrument specification and target selection
/ Bryant, J J ; Owers, M S ; Robotham, A S G ; Croom, S M ; Driver, S P ; Drinkwater, M J ; Lorente, N P F ; Cortese, L ; Scott, N ; Colless, M et al.
The SAMI Galaxy Survey will observe 3400 galaxies with the Sydney-AAO Multi-object Integral-field spectrograph (SAMI) on the Anglo-Australian Telescope (AAT) in a 3-year survey which began in 2013. [...]
arXiv:1407.7335.
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2014. - 25 p.
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346.
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Progress with the Prime Focus Spectrograph for the Subaru Telescope: a massively multiplexed optical and near-infrared fiber spectrograph
/ Sugai, Hajime ; Tamura, Naoyuki ; Karoji, Hiroshi ; Shimono, Atsushi ; Takato, Naruhisa ; Kimura, Masahiko ; Ohyama, Youichi ; Ueda, Akitoshi ; Aghazarian, Hrand ; de Arruda, Marcio Vital et al.
The Prime Focus Spectrograph (PFS) is an optical/near-infrared multi-fiber spectrograph with 2394 science fibers, which are distributed in 1.3 degree diameter field of view at Subaru 8.2-meter telescope. [...]
arXiv:1408.2825.
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2014. - 14 p.
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347.
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Spectroscopic detections of CIII]1909 at z~6-7: A new probe of early star forming galaxies and cosmic reionisation
/ Stark, Daniel P ; Richard, Johan ; Charlot, Stephane ; Clement, Benjamin ; Ellis, Richard ; Siana, Brian ; Robertson, Brant ; Schenker, Matthew ; Gutkin, Julia ; Wofford, Aida
Deep spectroscopic observations of z~6.5 galaxies have revealed a marked decline with increasing redshift in the detectability of Lyman-alpha emission. [...]
arXiv:1408.3649.
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2014. - 10 p.
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348.
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The NUHM2 after LHC Run 1
/ Buchmueller, O. (Imperial Coll., London) ; Cavanaugh, R. (Fermilab ; Illinois U., Chicago) ; Citron, M. (Imperial Coll., London) ; De Roeck, A. (Antwerp U. ; CERN) ; Dolan, M.J. (SLAC) ; Ellis, J.R. (King's Coll. London ; CERN) ; Flaecher, H. (Bristol U.) ; Heinemeyer, S. (Cantabria U., Santander) ; Malik, S. (Rockefeller U.) ; Marrouche, J. (Imperial Coll., London) et al.
We make a frequentist analysis of the parameter space of the NUHM2, in which the soft supersymmetry (SUSY)-breaking contributions to the masses of the two Higgs multiplets, $m^2_{H_{u,d}}$, vary independently from the universal soft SUSY-breaking contributions $m^2_0$ to the masses of squarks and sleptons. Our analysis uses the MultiNest sampling algorithm with over $4 \times 10^8$ points to sample the NUHM2 parameter space. [...]
arXiv:1408.4060; KCL-PH-TH-2014-33; LCTS-2014-29; CERN-PH-TH-2014-145; DESY-14-144; FERMILAB-PUB-14-605-CMS; FTPI-MINN-14-39; UMN-TH-3344-14; SLAC-PUB-16051; KCL-PH-TH-2014-33; LCTS-2014-29; CERN-PH-TH-2014-145; DESY 14-144; FTPI-MINN-14-39; UMN-TH-3344-14; SLAC-PUB-16051.-
2014-12-17 - 20 p.
- Published in : Eur. Phys. J. C 74 (2014) 3212
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: fermilab-pub-14-605-cms - PDF; arXiv:1408.4060 - PDF; Springer Open Access article: PDF; External link: Fermilab Library Server (fulltext available)
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352.
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Theory Summary and Prospects
/ Ellis, John (CERN ; King's Coll. London)
This talk reviews some of the theoretical progress and outstanding issues in QCD, flavour physics, Higgs and electroweak physics and the search for physics beyond the Standard Model at the Tevatron and the LHC, and previews some physics possibilities for future runs of the LHC and proposed future hadron colliders..
arXiv:1408.5866 ; KCL-PH-TH-2014-35 ; LCTS-2014-34 ; CERN-PH-TH-2014-161.
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2014. - 14 p.
Preprint - Full text
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355.
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Discrete Newtonian Cosmology: Perturbations
/ Ellis, George F R ; Gibbons, Gary W
In a previous paper [arXiv:1308.1852] we showed how a finite system of discrete particles interacting with each other via Newtonian gravitational attraction would lead to precisely the same dynamical equations for homothetic motion as in the case of the pressure-free Friedmann-Lema\^{i}tre-Robertson-Walker cosmological models of General Relativity Theory, provided the distribution of particles obeys the central configuration equation. [...]
arXiv:1409.0395.
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2014. - 24 p.
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360.
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No evidence for evolution in the typical rest-frame UV sizes or morphologies of L_* galaxies at 4<z<8
/ Curtis-Lake, E ; McLure, R J ; Dunlop, J S ; Rogers, A B ; Targett, T ; Dekel, A ; Ellis, R S ; Faber, S M ; Ferguson, H C ; Grogin, N A et al.
We present the results of a study investigating the sizes and morphologies of redshift 4<z<8 galaxies in the CANDELS GOODS-S, HUDF and HUDF parallel fields. Based on non-parametric measurements and incorporating a careful treatment of measurement biases, we quantify the typical size of galaxies at each redshift as the peak of the log-normal size distribution, rather than the arithmetic mean size [...]
arXiv:1409.1832.-
2016 - 19 p.
- Published in : Mon. Not. R. Astron. Soc. 457 (2016) 440-464
External link: Preprint
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365.
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The ATLAS Muon Topological Trigger Information for Run 2 of the LHC
/ Silva Oliveira, M ; Artz, S ; Bauss, B ; Boterenbrood, H ; Buescher, V ; Degele, R ; Dhaliwal, S ; Ellis, N ; Farthouat, P ; Galster, G et al.
For run 2 of the LHC, the ATLAS Level-1 trigger system will include topological information on trigger objects in order to cope with the increased trigger rates. The existing Muon-to-Central-Trigger- Processor interface (MUCTPI) has been modified in order to provide coarse-grained topological information on muon candidates. [...]
ATL-DAQ-SLIDE-2014-657.-
Geneva : CERN, 2014 - 1 p.
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : Topical Workshop on Electronics for Particle Physics 2014, Aix En Provence, France, 22 - 26 Sep 2014
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368.
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LEP1: the Ascent of the Standard Model
/ ELLIS, Jonathan R. (speaker) (CERN)
Abstract
When LEP was conceived, the Standard Model was not a phrase that appeared in the titles of particle physics papers. By the end of LEP1, the Standard Model had been established as the theory describing the visible matter in the Universe [...]
2014 - Streaming video.
Public Events; LEP I era (1984-1994) with a celebration of H. Schopper's 90th birthday
External links: Talk details; Event details
In : LEP I era (1984-1994) with a celebration of H. Schopper's 90th birthday
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369.
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The Spirit counts - People at and around CERN
/ SCHOPPER, Herwig (speaker) (CERN)
Abstract
After a few biographical remarks I shall concentrate on human aspects which are not covered by official documents, but which are as important to the success of CERN as scientific and technical competence. The approval of LEP, general problems of the project management and the approval of the LEP experiments under conditions never encountered before at CERN will be covered [...]
2014 - Streaming video.
Public Events; LEP I era (1984-1994) with a celebration of H. Schopper's 90th birthday
External links: Talk details; Event details
In : LEP I era (1984-1994) with a celebration of H. Schopper's 90th birthday
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374.
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CALIFA, the Calar Alto Legacy Integral Field Area survey. III. Second public data release
/ García-Benito, R ; Zibetti, S ; Sánchez, S F ; Husemann, B ; de Amorim, A L ; Castillo-Morales, A ; Fernandes, R Cid ; Ellis, S C ; Falcón-Barroso, J ; Galbany, L et al.
This paper describes the Second Public Data Release (DR2) of the Calar Alto Legacy Integral Field Area (CALIFA) survey. [...]
arXiv:1409.8302.
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2014. - 33 p.
Preprint
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379.
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Search for the $X_b$ and other hidden-beauty states in the $\pi^+ \pi^- \Upsilon(1 \rm S)$ channel at ATLAS
/ ATLAS Collaboration
This Letter presents a search for a hidden-beauty counterpart of the $X(3872)$ in the mass ranges 10.05--10.31 GeV and 10.40--11.00 GeV, in the channel $X_b \to \pi^{+} \pi^{-} \Upsilon(1 \rm S)(\rightarrow\mu^+\mu^-)$, using 16.2 fb$^{-1}$ of $\sqrt{s}=8$ TeV $pp$ collision data collected by the ATLAS detector at the LHC. No evidence for new narrow states is found, and upper limits are set on the product of the $X_b$ cross section and branching fraction, relative to those of the $\Upsilon(2 \rm S)$, at the 95% confidence level using the CL$_S$ approach. [...]
arXiv:1410.4409; CERN-PH-EP-2014-230.-
Geneva : CERN, 2015-01-05 - 19 p.
- Published in : Phys. Lett. B 74 (2015) 199-217
Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF;
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385.
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The ATLAS Level-1 Muon Topological Trigger Information for Run 2 of the LHC
/ Silva Oliveira, Marcos Vinicius (Juiz de Fora U.) ; Artz, Sebastian (Mainz U.) ; Bauss, Bruno (Mainz U.) ; Boterenbrood, Hendrik (NIKHEF, Amsterdam) ; Buescher, Volker (Mainz U.) ; Cerqueira, Augusto Santiago (Juiz de Fora U.) ; Degele, Reinold (Mainz U.) ; Dhaliwal, Saminder (NIKHEF, Amsterdam) ; Ellis, Nicolas (CERN) ; Farthouat, Philippe (CERN) et al.
For the next run of the LHC, the ATLAS Level-1 trigger system will include topological information on trigger objects from the calorimeters and muon detectors. [...]
ATL-DAQ-PROC-2014-041.
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2015. - 9 p.
Original Communication (restricted to ATLAS) - Full text
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386.
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Upgrade of the ATLAS Central Trigger for LHC Run-2
/ Artz, Sebastian (Mainz U.) ; Bauss, Bruno (Mainz U.) ; Boterenbrood, Hendrik (NIKHEF, Amsterdam) ; Buescher, Volker (Mainz U.) ; Degele, Reinold (Mainz U.) ; Dhaliwal, Saminder (NIKHEF, Amsterdam) ; Ellis, Nicolas (CERN) ; Farthouat, Philippe (CERN) ; Galster, Gorm Aske Gram (Copenhagen U.) ; Ghibaudi, Marco (CERN) et al.
The increased energy and luminosity of the LHC in the run-2 data taking period requires a more selective trigger menu in order to satisfy the physics goals of ATLAS. [...]
ATL-DAQ-PROC-2014-042.
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2015. - 6 p.
Original Communication (restricted to ATLAS) - Full text
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390.
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Flipped GUT Inflation
/ Ellis, John (King's Coll. London ; CERN) ; Gonzalo, Tomas E. (University Coll. London) ; Harz, Julia (University Coll. London) ; Huang, Wei-Chih (University Coll. London)
We analyse the prospects for constructing hybrid models of inflation that provide a dynamical realisation of the apparent closeness between the supersymmetric GUT scale and the possible scale of cosmological inflation. In the first place, we consider models based on the flipped SU(5)$\times$U(1) gauge group, which has no magnetic monopoles. [...]
arXiv:1412.1460; KCL-PH-TH-2014-49; LCTS-2014-50; CERN-PH-TH-2014-241; KCL-PH-TH-2014-49; LCTS-2014-50; CERN-PH-TH-2014-241.-
2015 - 21 p.
- Published in : JCAP 03 (2015) 039
Article from SCOAP3: PDF; Fulltext: PDF; IOP Open Access article: PDF; External link: Preprint
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399.
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The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
/ Alam, Shadab (Bruce and Astrid McWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, 5000 Forbes Ave, Pittsburgh, PA 15213, USA) ; Albareti, Franco D (Instituto de Física Teórica) ; Prieto, Carlos Allende (Instituto de Astrofísica de Canarias ; Departamento de Astrofísica, Universidad de La Laguna, E-38206, La Laguna, Tenerife, Spain) ; Anders, F (Leibniz-Institut für Astrophysik Potsdam) ; Anderson, Scott F (Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195, USA) ; Andrews, Brett H (Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA ; PITT PACC, Department of Physics and Astronomy, University of Pittsburgh, 3941 O'Hara Street, Pittsburgh, PA 15260, USA) ; Armengaud, Eric (CEA, Centre de Saclay, Irfu/SPP, F-91191 Gif-sur-Yvette, France) ; Aubourg, Éric (APC, University of Paris Diderot, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, Sorbonne Paris Cité, F-75205 Paris, France) ; Bailey, Stephen (Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA) ; Bautista, Julian E (APC, University of Paris Diderot, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, Sorbonne Paris Cité, F-75205 Paris, France) et al.
The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using the original SDSS wide-field imager, the original and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution spectrograph, and a novel optical interferometer. [...]
arXiv:1501.00963.
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2015. - 30 p.
Preprint
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403.
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Future Supply of Medical Radioisotopes for the UK Report 2014
/ Neilly, Brian ; Allen, Sarah ; Ballinger, Jim ; Buscombe, John ; Clarke, Rob ; Ellis, Beverley ; Flux, Glenn ; Fraser, Louise ; Hall, Adrian ; Owen, Hywel et al.
The UK has no research nuclear reactors and relies on the importation of 99Mo and other medical radioisotopes (e.g. [...]
arXiv:1501.03071.
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2015. - 121 p.
Preprint
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406.
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Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector
/ ATLAS Collaboration
Results of a search for $H \to \tau \tau$ decays are presented, based on the full set of proton--proton collision data recorded by the ATLAS experiment at the LHC during 2011 and 2012. The data correspond to integrated luminosities of 4.5 $\rm{fb}^{-1}$ and 20.3 $\rm{fb}^{-1}$ at centre-of-mass energies of $\sqrt{s}$ = 7 TeV and $\sqrt{s}$ = 8 TeV respectively. [...]
arXiv:1501.04943; CERN-PH-EP-2014-262; CERN-PH-EP-2014-262.-
Geneva : CERN, 2015-04-21 - 84 p.
- Published in : JHEP 04 (2015) 117
Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF;
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407.
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NANOGrav Constraints on Gravitational Wave Bursts with Memory
/ Arzoumanian, Z ; Brazier, A ; Burke-Spolaor, S ; Chamberlin, S J ; Chatterjee, S ; Christy, B ; Cordes, J M ; Cornish, N J ; Demorest, P B ; Deng, X et al.
Among efforts to detect gravitational radiation, pulsar timing arrays are uniquely poised to detect "memory" signatures, permanent perturbations in spacetime from highly energetic astrophysical events such as mergers of supermassive black hole binaries. [...]
arXiv:1501.05343.
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2015. - 12 p.
Preprint
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411.
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Library data
/ Orcutt, Darby
Numerical evidence is everywhere and how best to handle and leverage it is a growing concern in the academic world in general and the academic library world in particular [...]
Santa Barbara, CA : ABC-CLIO, 2009. - 313 p.
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ebook
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416.
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ALMA detection of [CII] 158 micron emission from a strongly lensed z=2 star-forming galaxy
/ Schaerer, D ; Boone, F ; Jones, T ; Dessauges-Zavadsky, M ; Sklias, P ; Zamojski, M ; Cava, A ; Richard, J ; Ellis, R ; Rawle, T D et al.
Our objectives are to determine the properties of the interstellar medium (ISM) and of star-formation in typical star-forming galaxies at high redshift. [...]
arXiv:1502.03842.
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2015. - 5 p.
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418.
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Detection and localization of single-source gravitational waves with pulsar timing arrays
/ Zhu, Xing-Jiang ; Wen, Linqing ; Hobbs, George ; Zhang, Yilin ; Wang, Yan ; Madison, Dustin R ; Manchester, Richard N ; Kerr, Matthew ; Rosado, Pablo A ; Wang, Jingbo
Pulsar timing arrays (PTAs) can be used to search for very low frequency ($10^{-9}$--$10^{-7}$ Hz) gravitational waves (GWs). [...]
arXiv:1502.06001.
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2015. - 17 p.
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419.
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A search for high-mass resonances decaying to $\tau^{+}\tau^{-}$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
/ ATLAS Collaboration
A search for high-mass resonances decaying into $\tau^{+}\tau^{-}$ final states using proton-proton collisions at $\sqrt{s}= 8$ TeV produced by the Large Hadron Collider is presented. The data were recorded with the ATLAS detector and correspond to an integrated luminosity of 19.5-20.3 fb$^{-1}$. No statistically significant excess above the Standard Model expectation is observed; 95% credibility upper limits are set on the cross section times branching fraction of $Z^{\prime}$ resonances decaying into $\tau^+\tau^-$ pairs as a function of the resonance mass. As a result, $Z^{\prime}$ bosons of the Sequential Standard Model with masses less than 2.02 TeV are excluded at 95% credibility. [...]
arXiv:1502.07177; CERN-PH-EP-2015-018; CERN-PH-EP-2015-018.-
Geneva : CERN, 2015-07-29 - 49 p.
- Published in : JHEP 07 (2015) 157
Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF;
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434.
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Search for low-scale gravity signatures in multi-jet final states with the ATLAS detector at $\sqrt{s}$ = 8 TeV
/ ATLAS Collaboration
We search for evidence of physics beyond the Standard Model in the production of final states with multiple high transverse momentum jets, using 20.3 $fb^{-1}$ of proton-proton collision data recorded by the ATLAS detector at $\sqrt{s}$ = 8 TeV. No excess of events beyond Standard Model expectations is observed, and upper limits on the visible cross-section for non-Standard Model production of multi-jet final states are set. [...]
arXiv:1503.08988; CERN-PH-EP-2015-066; CERN-PH-EP-2015-066.-
Geneva : CERN, 2015-07-07 - 23 p.
- Published in : JHEP 07 (2015) 032
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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435.
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Resolved spectroscopy of gravitationally lensed galaxies: global dynamics and star-forming clumps on ~100pc scales
/ Livermore, R C ; Jones, T A ; Richard, J ; Bower, R G ; Swinbank, A M ; Yuan, T -T ; Edge, A C ; Ellis, R S ; Kewley, L J ; Smail, Ian et al.
We present adaptive optics-assisted integral field spectroscopy around the Ha or Hb lines of 12 gravitationally lensed galaxies obtained with VLT/SINFONI, Keck/OSIRIS and Gemini/NIFS. [...]
arXiv:1503.07873.
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2015. - 26 p.
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436.
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Phenomenological Aspects of No-Scale Inflation Models
/ Ellis, John (King's Coll. London ; CERN) ; Garcia, Marcos A. G. (Minnesota U., Theor. Phys. Inst.) ; Nanopoulos, Dimitri V. (Texas A-M) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
We discuss phenomenological aspects of no-scale supergravity inflationary models motivated by compactified string models, in which the inflaton may be identified either as a K\"ahler modulus or an untwisted matter field, focusing on models that make predictions for the scalar spectral index $n_s$ and the tensor-to-scalar ratio $r$ that are similar to the Starobinsky model. We discuss possible patterns of soft supersymmetry breaking, exhibiting examples of the pure no-scale type $m_0 = B_0 = A_0 = 0$, of the CMSSM type with universal $A_0$ and $m_0 \ne 0$ at a high scale, and of the mSUGRA type with $A_0 = B_0 + m_0$ boundary conditions at the high input scale. [...]
arXiv:1503.08867; KCL-PH-TH-2015-14; LCTS-2015-06; CERN-PH-TH-2015-064; ACT-03-15; FTPI-MINN-15-12; UMN-TH-3426-15; KCL-PH-TH-2015-14; LCTS-2015-06; CERN-PH-TH-2015-064; ACT-03-15; UMN-TH-3426-15; FTPI-MINN-15-12.-
Geneva : CERN, 2015-10-01 - 41 p.
- Published in : JCAP 10 (2015) 003
Article from SCOAP3: PDF; Fulltext: PDF; IOP Open Access article: PDF; External link: Preprint
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438.
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Testing Theories of Gravitation Using 21-Year Timing of Pulsar Binary J1713+0747
/ Zhu, W W ; Stairs, I H ; Demorest, P B ; Nice, D J ; Ellis, J A ; Ransom, S M ; Arzoumanian, Z ; Crowter, K ; Dolch, T ; Ferdman, R D et al.
We report 21-yr timing of one of the most precise pulsars: PSR J1713+0747. [...]
arXiv:1504.00662.
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2015. - 14 p.
Preprint
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439.
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Towards an Understanding of the Correlations in Jet Substructure
/ Adams, D. (Brookhaven) ; Arce, A. (Duke U.) ; Asquith, L. (U. Sussex (main)) ; Backovic, M. (Louvain U.) ; Barillari, T. (Munich, Max Planck Inst.) ; Berta, P. (Charles U.) ; Bertolini, D. (UC, Berkeley) ; Buckley, A. (Glasgow U.) ; Butterworth, J. (University Coll. London) ; Camacho Toro, R.C. (Geneva U.) et al.
Over the past decade, a large number of jet substructure observables have been proposed in the literature, and explored at the LHC experiments. Such observables attempt to utilize the internal structure of jets in order to distinguish those initiated by quarks, gluons, or by boosted heavy objects, such as top quarks and W bosons. [...]
arXiv:1504.00679; FERMILAB-PUB-15-670-CMS; SLAC-PUB-16703.-
2015-09-09 - 53 p.
- Published in : Eur. Phys. J. C 75 (2015) 409
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: fermilab-pub-15-670-cms - PDF; arXiv:1504.00679 - PDF; Fulltext from Publisher: PDF; Springer Open Access article: PDF; External link: Fermilab Library Server (fulltext available)
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442.
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Physics at the e+ e- Linear Collider
/ Moortgat-Pick, G. (ed.) (Hamburg U. ; DESY) ; Baer, H. (ed.) (Oklahoma U.) ; Battaglia, M. (ed.) (UC, Santa Cruz) ; Belanger, G. (ed.) (Annecy, LAPTH) ; Fujii, K. (ed.) (KEK, Tsukuba) ; Kalinowski, J. (ed.) (Warsaw U.) ; Heinemeyer, S. (ed.) (Cantabria U., Santander) ; Kiyo, Y. (ed.) (Juntendo U.) ; Olive, K. (ed.) (Minnesota U.) ; Simon, F. (ed.) (Munich, Max Planck Inst.) et al.
A comprehensive review of physics at an e+e- Linear Collider in the energy range of sqrt{s}=92 GeV--3 TeV is presented in view of recent and expected LHC results, experiments from low energy as well as astroparticle physics.The report focuses in particular on Higgs boson, Top quark and electroweak precision physics, but also discusses several models of beyond the Standard Model physics such as Supersymmetry, little Higgs models and extra gauge bosons. The connection to cosmology has been analyzed as well..
arXiv:1504.01726; DESY-14-241; CERN-PH-TH-2015-042; FERMILAB-PUB-15-132-T; DESY 14-241; CERN-PH-TH-2015-042.-
Geneva : CERN, 2015-08-14 - 180 p.
- Published in : Eur. Phys. J. C 75 (2015) 371
Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Fermilab Library Server (fulltext available)
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443.
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The Swift Gamma-Ray Burst Host Galaxy Legacy Survey - I. Sample Selection and Redshift Distribution
/ Perley, D A ; Krühler, T ; Schulze, S ; Postigo, A de Ugarte ; Hjorth, J ; Berger, E ; Cenko, S B ; Chary, R ; Cucchiara, A ; Ellis, R et al.
We introduce the Swift Gamma-Ray Burst Host Galaxy Legacy Survey ("SHOALS"), a multi-observatory high-redshift galaxy survey targeting the largest unbiased sample of long-duration gamma-ray burst hosts yet assembled (119 in total). We describe the motivations of the survey and the development of our selection criteria, including an assessment of the impact of various observability metrics on the success rate of afterglow-based redshift measurement. [...]
arXiv:1504.02482.-
2016
- Published in : Astrophys. J. 81 (2016) 7
External link: Preprint
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454.
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A Historical Profile of the Higgs Boson
/ Ellis, John (King's Coll. London ; CERN) ; Gaillard, Mary K. (LBL, Berkeley ; UC, Berkeley) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy)
The Higgs boson was postulated in 1964, and phenomenological studies of its possible production and decays started in the early 1970s, followed by studies of its possible production in e+ e−, and pp collisions, in particular. Until recently, the most sensitive searches for the Higgs boson were at LEP between 1989 and 2000, which were complemented by searches at the Fermilab Tevatron. [...]
KCL-PH-TH-2015-20; LCTS-2015-10; CERN-PH-TH-2015-098; arXiv:1504.07217; KCL-PH-TH-2015-20; LCTS-2015-10; CERN-PH-TH-2015-098.-
Geneva : CERN, 2016 - 20 p.
- Published in : 10.1142/9789814733519_0014
Fulltext: PDF; Preprint: PDF; External link: Fulltext
In : The standard theory of particle physics, pp.255-274
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459.
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Light Curves of Core-Collapse Supernovae with Substantial Mass Loss using the New Open-Source SuperNova Explosion Code (SNEC)
/ Morozova, V (TAPIR, Caltech) ; Piro, A L (Carnegie) ; Renzo, M (Pisa ; TAPIR, Caltech) ; Ott, C D (TAPIR, Caltech) ; Clausen, D (TAPIR, Caltech) ; Couch, S M (TAPIR, Caltech) ; Ellis, J (TAPIR, Caltech) ; Roberts, L F (TAPIR, Caltech)
We present the SuperNova Explosion Code SNEC, an open-source Lagrangian code for the hydrodynamics and equilibrium-diffusion radiation transport in the expanding envelopes of supernovae. [...]
arXiv:1505.06746.
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2015. - 17 p.
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460.
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Calculations of Inflaton Decays and Reheating: with Applications to No-Scale Inflation Models
/ Ellis, John (King's Coll. London ; CERN) ; Garcia, Marcos A. G. (Minnesota U., Theor. Phys. Inst.) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
We discuss inflaton decays and reheating in no-scale Starobinsky-like models of inflation, calculating the effective equation-of-state parameter, $w$, during the epoch of inflaton decay, the reheating temperature, $T_{\rm reh}$, and the number of inflationary e-folds, $N_*$, comparing analytical approximations with numerical calculations. We then illustrate these results with applications to models based on no-scale supergravity and motivated by generic string compactifications, including scenarios where the inflaton is identified as an untwisted-sector matter field with direct Yukawa couplings to MSSM fields, and where the inflaton decays via gravitational-strength interactions. [...]
KCL-PH-TH-2015-23; LCTS-2015-13; CERN-PH-TH-2015-122; ACT-04-15; UMN-TH-3438-15; FTPI-MINN-15-26; arXiv:1505.06986; MI-TH-1513; KCL-PH-TH-2015-23; LCTS-2015-13; CERN-PH-TH-2015-122; ACT-04-15; MI-TH-1513; UMN-TH-3438-15; FTPI-MINN-15-26.-
Geneva : CERN, 2015-07-30 - 33 p.
- Published in : JCAP 07 (2015) 050
Article from SCOAP3: PDF; IOP Open Access article: PDF; Preprint: PDF; External link: Preprint
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462.
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French slanguage
/ Ellis, Michael
With this fun visual guide, simply follow the illustrated prompts and read the English words out loud: soon you'll be speaking French! Ask how someone is doing: "Comet Haley View" or say thank you very much: "Mare See Bow Cool." The simple icons are easy to follow and this pocket-sized guide i [...]
Newburyport, MA : Gibbs Smith, 2012. - 148 p.
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463.
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The NANOGrav Nine-year Data Set: Observations, Arrival Time Measurements, and Analysis of 37 Millisecond Pulsars
/ Arzoumanian, Z ; Brazier, A ; Burke-Spolaor, S ; Chamberlin, S ; Chatterjee, S ; Christy, B ; Cordes, J M ; Cornish, N ; Crowter, K ; Demorest, P B et al.
We present high-precision timing observations spanning up to nine years for 37 millisecond pulsars monitored with the Green Bank and Arecibo radio telescopes as part of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) project. [...]
arXiv:1505.07540.
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2015. - 36 p.
Preprint
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471.
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Simplified Models for Dark Matter Searches at the LHC
/ Abdallah, Jalal (Taiwan, Inst. Phys.) ; Araujo, Henrique (Imperial Coll., London) ; Arbey, Alexandre (Lyon U. ; Lyon, Ecole Normale Superieure ; CERN) ; Ashkenazi, Adi (Tel Aviv U.) ; Belyaev, Alexander (Southampton U.) ; Berger, Joshua (SLAC) ; Boehm, Celine (Durham U., IPPP) ; Boveia, Antonio (CERN) ; Brennan, Amelia (Melbourne U.) ; Brooke, Jim (Bristol U.) et al.
This document outlines a set of simplified models for dark matter and its interactions with Standard Model particles. It is intended to summarize the main characteristics that these simplified models have when applied to dark matter searches at the LHC, and to provide a number of useful expressions for reference. [...]
arXiv:1506.03116; FERMILAB-PUB-15-283-CD; CERN-PH-TH-2015-139; CERN-PH-TH-2015-139.-
Geneva : CERN, 2016-05-12 - 16 p.
- Published in : Phys. Dark Universe 9-10 (2015) 8-23
Elsevier Open Access article: PDF; Fulltext: PDF; External link: Fermilab Accepted Manuscript
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473.
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Study of $(W/Z)H$ production and Higgs boson couplings using $H \rightarrow WW^{\ast}$ decays with the ATLAS detector
/ ATLAS Collaboration
A search for Higgs boson production in association with a $W$ or $Z$ boson, in the $H \rightarrow WW^{\ast}$ decay channel, is performed with a data sample collected with the ATLAS detector at the LHC in proton-proton collisions at centre-of-mass energies $\sqrt{s}=7$ TeV and 8 TeV, corresponding to integrated luminosities of 4.5 ${\rm fb}^{-1}$ and 20.3 ${\rm fb}^{-1}$, respectively. The $WH$ production mode is studied in two-lepton and three-lepton final states, while two-lepton and four-lepton final states are used to search for the $ZH$ production mode. [...]
arXiv:1506.06641; CERN-PH-EP-2015-104; CERN-PH-EP-2015-104.-
Geneva : CERN, 2015-08-27 - 48 p.
- Published in : JHEP 08 (2015) 137
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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478.
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ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider
/ ATLAS Collaboration
This paper reviews and extends searches for the direct pair production of the scalar supersymmetric partners of the top and bottom quarks in proton--proton collisions collected by the ATLAS collaboration during the LHC Run 1. Most of the analyses use 20 fb$^{-1}$ of collisions at a centre-of-mass energy of $\sqrt{s} = 8$ TeV, although in some case an additional 4.7 fb$^{-1}$ of collision data at $\sqrt{s}= 7$ TeV are used. [...]
arXiv:1506.08616; CERN-PH-EP-2015-138.-
Geneva : CERN, 2015-10-29 - 54 p.
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Erratum: PDF; Fulltext: PDF; Springer Open Access article: PDF;
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479.
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Galaxy And Mass Assembly (GAMA): end of survey report and data release 2
/ Liske, J (ESO) ; Baldry, I K ; Driver, S P ; Tuffs, R J ; Alpaslan, M ; Andrae, E ; Brough, S ; Cluver, M E ; Grootes, M W ; Gunawardhana, M L P et al.
The Galaxy And Mass Assembly (GAMA) survey is one of the largest contemporary spectroscopic surveys of low-redshift galaxies. [...]
arXiv:1506.08222.
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2015. - 40 p.
Preprint
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480.
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Quantum photonics hybrid integration platform
/ Murray, Eoin ; Ellis, David P ; Meany, Thomas ; Flother, Frederick F ; Lee, James P ; Griffiths, Jonathan P ; Jones, Geb A C ; Farrer, Ian ; Ritchie, David A ; Bennet, Anthony J et al.
Fundamental to integrated photonic quantum computing is an on-chip method for routing and modulating quantum light emission. [...]
arXiv:1507.00256.
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2015. - 4 p.
Preprint
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482.
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Prime Focus Spectrograph for the Subaru telescope: massively multiplexed optical and near-infrared fiber spectrograph
/ Sugai, Hajime ; Tamura, Naoyuki ; Karoji, Hiroshi ; Shimono, Atsushi ; Takato, Naruhisa ; Kimura, Masahiko ; Ohyama, Youichi ; Ueda, Akitoshi ; Aghazarian, Hrand ; de Arruda, Marcio Vital et al.
The Prime Focus Spectrograph (PFS) is an optical/near-infrared multifiber spectrograph with 2394 science fibers distributed across a 1.3-deg diameter field of view at the Subaru 8.2-m telescope. The wide wavelength coverage from 0.38 {\mu}m to 1.26 {\mu}m, with a resolving power of 3000, simultaneously strengthens its ability to target three main survey programs: cosmology, galactic archaeology and galaxy/AGN evolution. [...]
arXiv:1507.00725.-
2015 - 19 p.
- Published in : Journal of Astronomical Telescopes, Instruments, and Systems, 1(3), 035001 (2015)
External link: Preprint
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487.
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Measurements of the Higgs boson production and decay rates and coupling strengths using $pp$ collision data at $\sqrt{s}=7$ and $8$ TeV in the ATLAS experiment
/ ATLAS Collaboration
Combined analyses of the Higgs boson production and decay rates as well as its coupling strengths to vector bosons and fermions are presented. The combinations include the results of the analyses of the $H\to\gamma\gamma,\, ZZ^*,\, WW^*,\, Z\gamma,\, b\bar{b},\, \tau\tau$ and $\mu\mu$ decay modes, and the constraints on the associated production with a pair of top quarks and on the off-shell coupling strengths of the Higgs boson. [...]
arXiv:1507.04548; CERN-PH-EP-2015-125; CERN-PH-EP-2015-125.-
Geneva : CERN, 2016-01-05 - 64 p.
- Published in : Eur. Phys. J. C 76 (2016) 6
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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488.
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Summary of the searches for squarks and gluinos using $\sqrt{s}$ = 8 TeV $pp$ collisions with the ATLAS experiment at the LHC
/ ATLAS Collaboration
A summary is presented of ATLAS searches for gluinos and first- and second-generation squarks in final states containing jets and missing transverse momentum, with or without leptons or $b$-jets, in the $\sqrt{s}$ = 8 TeV data set collected at the Large Hadron Collider in 2012. This paper reports the results of new interpretations and statistical combinations of previously published analyses, as well as a new analysis. Since no significant excess of events over the Standard Model expectation is observed, the data are used to set limits in a variety of models. [...]
arXiv:1507.05525; CERN-PH-EP-2015-162; CERN-PH-EP-2015-162.-
Geneva : CERN, 2015-10-08 - 91 p.
- Published in : JHEP 10 (2015) 054
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External links: Previous draft version; Preprint
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493.
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Determination of the ratio of $b$-quark fragmentation fractions $f_s/f_d$ in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
/ ATLAS Collaboration
With an integrated luminosity of 2.47 fb$^{-1}$ recorded by the ATLAS experiment at the LHC, the exclusive decays $B_{s}^{0}\rightarrow J/\psi\phi$ and $B_{d}^{0}\rightarrow J/\psi K^{*0}$ of $B$ mesons produced in $pp$ collisions at $\sqrt{s}=7$ TeV are used to determine the ratio of fragmentation fractions $f_s/f_d$. From the observed yields of 6640 $\pm$ 100(stat) $\pm$ 220(sys) $B_{s}^{0} \rightarrow J/\psi\phi$ events and 36290 $\pm$ 320(stat) $\pm$ 650(sys) $B_{d}^{0}\rightarrow J/\psi K^{*0}$ events, the quantity $\frac{f_s}{f_d}\frac{\mathcal{B}(B_{s}^{0} \rightarrow J/\psi \phi)}{\mathcal{B}(B_{d}^{0} \rightarrow J/\psi K^{*0})}$ is estimated to be 0.199 $\pm$ 0.004(stat) $\pm$ 0.010(sys)..
arXiv:1507.08925; CERN-PH-EP-2015-165; CERN-PH-EP-2015-165.-
Geneva : CERN, 2015-12-30 - 18 p.
- Published in : Phys. Rev. Lett. 115 (2015) 262001
APS Open Access article: PDF; Fulltext: arXiv:1507.08925 - PDF; 10.1103_PhysRevLett.115.262001 - PDF; External links: Previous draft version; Preprint
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496.
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The Subaru FMOS Galaxy Redshift Survey (FastSound). III. The mass-metallicity relation and the fundamental metallicity relation at $z\sim1.4$
/ Yabe, Kiyoto ; Ohta, Kouji ; Akiyama, Masayuki ; Bunker, Andrew ; Dalton, Gavin ; Ellis, Richard ; Glazebrook, Karl ; Goto, Tomotsugu ; Imanishi, Masatoshi ; Iwamuro, Fumihide et al.
We present the results from a large near-infrared spectroscopic survey with Subaru/FMOS (\textit{FastSound}) consisting of $\sim$ 4,000 galaxies at $z\sim1.4$ with significant H$\alpha$ detection. [...]
arXiv:1508.01512.
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2015. - 14 p.
Preprint
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497.
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The NANOGrav Nine-year Data Set: Limits on the Isotropic Stochastic Gravitational Wave Background
/ Arzoumanian, Zaven ; Brazier, Adam ; Burke-Spolaor, Sarah ; Chamberlin, Sydney ; Chatterjee, Shami ; Christy, Brian ; Cordes, Jim ; Cornish, Neil ; Demorest, Paul ; Deng, Xihao et al.
We compute upper limits on the nanohertz-frequency isotropic stochastic gravitational wave background (GWB) using the 9-year data release from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) collaboration. [...]
arXiv:1508.03024.
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2015. - 21 p.
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499.
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Spectral Models for Early Time SN 2011fe Observations
/ Baron, E ; Friesen, P Hoeflich Brian ; Sullivan, M ; Hsiao, E ; Ellis, R S ; Gal-Yam, A ; Howell, D A ; Nugent, P E ; Dominguez, I ; Krisciunas, K et al.
We use observed UV through near IR spectra to examine whether SN 2011fe can be understood in the framework of Branch-normal SNe Ia and to examine its individual peculiarities. [...]
arXiv:1508.04774.
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2015. - 9 p.
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515.
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Gammapy - A Python package for {\gamma}-ray astronomy
/ Donath, Axel ; Deil, Christoph ; Arribas, Manuel P ; King, Johannes ; Owen, Ellis ; Terrier, Régis ; Reichardt, Ignasi ; Harris, Jon ; Bühler, Rolf ; Klepser, Stefan
In the past decade imaging atmospheric Cherenkov telescope arrays such as H.E.S.S., MAGIC, VERITAS, as well as the Fermi-LAT space telescope have provided us with detailed images and spectra of the {\gamma}-ray universe for the first time [...]
arXiv:1509.07408.
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2015.
Preprint
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518.
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Outer-disk reddening and gas-phase metallicities: The CALIFA connection
/ Marino, R A ; de Paz, A Gil ; Sánchez, S F ; Sánchez-Blazquez, P ; Cardiel, N ; Castillo-Morales, A ; Pascual, S ; Vílchez, J ; Kehrig, C ; Mollá, M et al.
/CALIFA Team
We study, for the first time in a statistically significant and well-defined sample, the relation between the outer-disk ionized-gas metallicity gradients and the presence of breaks in the surface brightness profiles of disk galaxies. SDSS g'- and r'-band surface brightness, (g'- r') color, and ionized-gas oxygen abundance profiles for 324 galaxies within the CALIFA survey are used for this purpose. [...]
arXiv:1509.07878.-
2016 - 10 p.
- Published in : Astron. Astrophys. 585 (2016) A47
External link: Preprint
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519.
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Beyond the CMSSM without an Accelerator: Proton Decay and Direct Dark Matter Detection
/ Ellis, John (King's Coll. London ; CERN) ; Evans, Jason L. (Minnesota U., Theor. Phys. Inst.) ; Luo, Feng (CERN) ; Nagata, Natsumi (Minnesota U., Theor. Phys. Inst. ; Tokyo U., IPMU) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Sandick, Pearl (Utah U.)
We consider two potential non-accelerator signatures of generalizations of the well-studied constrained minimal supersymmetric standard model (CMSSM). In one generalization, the universality constraints on soft supersymmetry-breaking parameters are applied at some input scale $M_{in}$ below the grand unification (GUT) scale $M_{GUT}$, a scenario referred to as `sub-GUT'. [...]
arXiv:1509.08838; KCL-PH-TH-2015-42; LCTS-2015-29; CERN-PH-TH-2015-229; UMN-TH-3502-15; FTPI--MINN--15-41; IPMU15--0174; CETUP2015-021; UMN--TH--3502-15; KCL-PH-TH-2015-42; LCTS-2015-29; CERN-PH-TH-2015-229; UMN-TH-3502-15; FTPI-MINN-15-41; IPMU15-0174; CETUP-2015-021.-
Geneva Geneva : CERN, CERN, 2016-01-05 - 42 p.
- Published in : Eur. Phys. J. C 76 (2016) 8
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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520.
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The NANOGrav Nine-year Data Set: Astrometric Measurements of 37 Millisecond Pulsars
/ Matthews, Allison M ; Nice, David J ; Fonseca, Emmanuel ; Arzoumanian, Zaven ; Crowter, Kathryn ; Demorest, Paul B ; Dolch, Timothy ; Ellis, Justin A ; Ferdman, Robert D ; Gonzalez, Marjorie E et al.
Using the nine-year radio-pulsar timing data set from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav), collected at Arecibo Observatory and the Green Bank Telescope, we have measured the positions, proper motions, and parallaxes for 37 millisecond pulsars. [...]
arXiv:1509.08982.
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2015.
Preprint
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527.
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Prospects for Supersymmetry at the LHC & Beyond
/ Ellis, John (CERN ; King's Coll. London)
Run 1 of the LHC has provided three new motivations for supersymmetry: the need to stabilize the electroweak vacuum, the mass of the Higgs boson, and the fact that its couplings are Standard Model-like (so far). The prospects for discovering (and measuring) supersymmetry during future runs of the LHC are discussed in the frameworks of the constrained MSSM (CMSSM), models with non-universal soft supersymmetry-breaking contributions to Higgs masses (NUHM1,2) and the phenomenological MSSM with 10 arbitrary soft supersymmetry-breaking parameters (pMSSM10). [...]
arXiv:1510.06204; KCL-PH-TH-2015-48; LCTS-2015-36; CERN-PH-TH-2015-250; KCL-PH-TH-2015-48; LCTS-2015-36; CERN-PH-TH-2015-250.-
Geneva Geneva : SISSA, 2015-11-14 - 17 p.
- Published in : PoS: PLANCK2015 (2015) , pp. 041
Fulltext: PoS(PLANCK 2015)041 - PDF; arXiv:1510.06204 - PDF; Published version from PoS: PDF; External link: Preprint
In : PLANCK2015 18th International Conference From the Planck Scale to the Electroweak Scale, Ioannina, Greece, 25 - 29 May 2015, pp.041
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529.
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HKUST Jockey Club Institute for Advanced Study - HKUST 2015 HKUST2015
05 - 30 Jan 2015
- Hong Kong, China
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After the discovery of the Higgs boson, the main objectives of the future high-energy physics are the precise measurement of Higgs properties and searches for new physics. These objectives strongly motivate the construction of an e+e- Higgs factory and a new pp collider with energy significantly higher than the LHC. [...]
2015
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530.
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9th FCC-ee (TLEP) Physics Workshop - TLEP9 TLEP 9
03 - 05 Feb 2015
- Pisa, Italy
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This is the 9th in the series of FCCee/TLEP-related workshops. It follows on from the sucessful 8th TLEP workshop that took place in Paris on 27-29 October 2014, and the FCC kick-off meeting held on 12-15 February 2014 at University of Geneva [...]
2015
Conference home page
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533.
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A search for prompt lepton-jets in pp collisions at $\sqrt{s}=$ 8 TeV with the ATLAS detector
/ ATLAS Collaboration
A search is presented for a new, light boson with a mass of about 1 GeV and decaying promptly to jets of collimated electrons and/or muons (lepton-jets). The analysis is performed with 20.3 fb $^{-1}$, of data collected by the ATLAS detector at the Large Hadron Collider in proton--proton collisions at a centre-of-mass energy of 8 TeV. [...]
arXiv:1511.05542; CERN-PH-EP-2015-242; CERN-PH-EP-2015-242.-
Geneva : CERN, 2016-02-09 - 51 p.
- Published in : JHEP 02 (2016) 062
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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538.
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CP Violation in Heavy MSSM Higgs Scenarios
/ Carena, M. (Chicago U., EFI ; Chicago U., KICP ; Fermilab) ; Ellis, J. (CERN ; King's Coll. London) ; Lee, J.S. (Chonnam Natl. U.) ; Pilaftsis, A. (CERN ; Manchester U.) ; Wagner, C.E.M. (Argonne ; Chicago U., EFI ; Chicago U., KICP)
We introduce and explore new heavy Higgs scenarios in the Minimal Supersymmetric Standard Model (MSSM) with explicit CP violation, which have important phenomenological implications that may be testable at the LHC. For soft supersymmetry-breaking scales M_S above a few TeV and a charged Higgs boson mass M_H+ above a few hundred GeV, new physics effects including those from explicit CP violation decouple from the light Higgs boson sector. [...]
arXiv:1512.00437; CNU-HEP-15-07; FERMILAB-PUB-15-508-T; EFI-15-36; MAN-HEP-2015-19; LCTS-2015-37; CERN-PH-TH-2015-252; KCL-PH-TH-2015-49; CNU-HEP-15-07; FERMILAB-PUB-15-508-T; EFI-15-36; MAN-HEP-2015-19; KCL-PH-TH-2015-49; LCTS-2015-37; CERN-PH-TH-2015-252.-
Geneva : CERN, 2016-02-18 - 39 p.
- Published in : JHEP 02 (2016) 123
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: fermilab-pub-15-508-t - PDF; arXiv:1512.00437 - PDF; Springer Open Access article: PDF; External link: Fermilab Library Server (fulltext available)
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539.
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Performance of $b$-Jet Identification in the ATLAS Experiment
/ ATLAS Collaboration
The identification of jets containing $b$ hadrons is important for the physics programme of the ATLAS experiment at the Large Hadron Collider. Several algorithms to identify jets containing $b$ hadrons are described, ranging from those based on the reconstruction of an inclusive secondary vertex or the presence of tracks with large impact parameters to combined tagging algorithms making use of multi-variate discriminants. [...]
arXiv:1512.01094; CERN-PH-EP-2015-216.-
Geneva : CERN, 2016-04-04 - 127 p.
- Published in : JINST 11 (2016) P04008
Fulltext: arXiv:1512.01094 - PDF; 10.1088_1748-0221_11_04_P04008 - PDF; pdf - PDF; External links: Previous draft version; Preprint
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545.
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The Universal One-Loop Effective Action
/ Drozd, Aleksandra (King's Coll. London) ; Ellis, John (King's Coll. London ; CERN) ; Quevillon, Jérémie (King's Coll. London) ; You, Tevong (Cambridge U. ; Cambridge U., DAMTP ; King's Coll. London)
We present the universal one-loop effective action for all operators of dimension up to six obtained by integrating out massive, non-degenerate multiplets. Our general expression may be applied to loops of heavy fermions or bosons, and has been checked against partial results available in the literature. [...]
arXiv:1512.03003; KCL-PH-TH-2015-54; LCTS-2015-42; CERN-PH-TH-2015-284; DAMTP-2015-88; CAVENDISH-HEP-15-12; KCL-PH-TH-2015-54; LCTS-2015-42; CERN-PH-TH-2015-284; CAVENDISH-HEP-15-12; DAMTP-2015-88.-
Geneva : CERN, 2016-03-25 - 30 p.
- Published in : JHEP 03 (2016) 180
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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548.
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Search for strong gravity in multijet final states produced in pp collisions at $\sqrt{s}=$ 13 TeV using the ATLAS detector at the LHC
/ ATLAS Collaboration
A search is conducted for new physics in multijet final states using 3.6 inverse femtobarns of data from proton-proton collisions at $\sqrt{s}=13$ TeV taken at the CERN Large Hadron Collider with the ATLAS detector. Events are selected containing at least three jets with scalar sum of jet transverse momenta ($H_\mathrm{T}$) greater than 1 TeV. No excess is seen at large $H_\mathrm{T}$ and limits are presented on new physics: models which produce final states containing at least three jets and having cross sections larger than 1.6 fb with $H_\mathrm{T}>$ 5.8 TeV are excluded. [...]
arXiv:1512.02586; CERN-PH-EP-2015-312.-
Geneva : CERN, 2016-03-07 - 40 p.
- Published in : JHEP 03 (2016) 026
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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551.
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On generalized wormhole in the Eddington inspired Born-Infeld (EiBI) gravity
/ Tamang, Amarjit ; Potapov, Alexander A ; Lukmanova, Regina ; Izmailov, Ramil ; Nandi, Kamal K
In this paper, we wish to investigate certain observable effects in the recently obtained wormhole solution of the EiBI theory, which generalizes the zero mass Ellis-Bronnikov wormhole of general relativity. The solutions of EiBI theory contain an extra parameter $\kappa$ having the inverse dimension of the cosmological constant $\Lambda$, and is expected to modify various general relativistic observables such as the masses of wormhole mouths, tidal forces and light deflection. [...]
arXiv:1512.01451.-
2015 - 20 p.
- Published in : Class.Quant.Grav. 32(23) : 235028, 2015
External link: Preprint
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552.
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Post-Inflationary Gravitino Production Revisited
/ Ellis, John (CERN ; King's Coll. London) ; Garcia, Marcos A. G. (Minnesota U., Theor. Phys. Inst.) ; Nanopoulos, Dimitri V. (Athens Academy ; HARC, Woodlands ; Texas A-M) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Peloso, Marco (Minnesota U., Theor. Phys. Inst.)
We revisit gravitino production following inflation. As a first step, we review the standard calculation of gravitino production in the thermal plasma formed at the end of post-inflationary reheating when the inflaton has completely decayed. [...]
arXiv:1512.05701; KCL-PH-TH-2015-46; LCTS-2015-33; CERN-PH-TH-2015-239; ACT-10-15; UMN-TH-3511-15; FTPI-MINN-15-48; MI-TH-1541; KCL-PH-TH-2015-46; LCTS-2015-33; CERN-PH-TH-2015-239; ACT-10-15; MI-TH-1541; UMN-TH-3511-15; FTPI-MINN-15-48.-
Geneva : CERN, 2016-03-04 - 34 p.
- Published in : JCAP 03 (2016) 008
Fulltext: PDF; IOP Open Access article: PDF; External link: Preprint
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554.
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On the Interpretation of a Possible $\sim 750$ GeV Particle Decaying into $\gamma \gamma$
/ Ellis, John (CERN ; King's Coll. London) ; Ellis, Sebastian A. R. (Michigan U. ; Michigan U., MCTP) ; Quevillon, Jérémie (King's Coll. London) ; Sanz, Veronica (Sussex U.) ; You, Tevong (Cambridge U. ; Cambridge U., DAMTP)
We consider interpretations of the recent $\sim 3 \sigma$ reports by the CMS and ATLAS collaborations of a possible $X(\sim 750~{\rm GeV})$ state decaying into $\gamma \gamma$ final states. We focus on the possibilities that this is a scalar or pseudoscalar electroweak isoscalar state produced by gluon-gluon fusion mediated by loops of heavy fermions. [...]
arXiv:1512.05327; KCL-PH-TH-2015-56; LCTS-2015-46; CERN-PH-TH-2015-303; MCTP-15-33; DAMTP-2015-90; CAVENDISH-HEP-15-14; KCL-PH-TH-2015-56; LCTS-2015-46; CERN-PH-TH-2015-303; MCTP-15-33; CAVENDISH-HEP-15-14; DAMTP-2015-90.-
Geneva : CERN, 2016-03-25 - 36 p.
- Published in : JHEP 03 (2016) 176
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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557.
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The NANOGrav Nine-Year Data Set: Noise Budget for Pulsar Arrival Times on Intraday Timescales
/ Lam, M T ; Cordes, J M ; Chatterjee, S ; Arzoumanian, Z ; Crowter, K ; Demorest, P B ; Dolch, T ; Ellis, J A ; Ferdman, R D ; Fonseca, E F et al.
The use of pulsars as astrophysical clocks for gravitational wave experiments demands the highest possible timing precision. [...]
arXiv:1512.08326.
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2015. - 21 p.
Preprint
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558.
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Search for Sphalerons in Proton-Proton Collisions
/ Ellis, John (King's Coll. London ; CERN) ; Sakurai, Kazuki (Durham U. ; Durham U., IPPP)
In a recent paper, Tye and Wong (TW) have argued that sphaleron-induced transitions in high-energy proton-proton collisions should be enhanced compared to previous calculations, based on a construction of a Bloch wave function in the periodic sphaleron potential and the corresponding pass band structure. Here we convolute the calculations of TW with parton distribution functions and simulations of final states to explore the signatures of sphaleron transitions at the LHC and possible future colliders. [...]
arXiv:1601.03654; KCL-PH-TH-2016-03; LCTS-2016-02; CERN-TH-2016-011; IPPP-16-02; KCL-PH-TH-2016-03; LCTS-2016-02; CERN-TH-2016-011; IPPP-16-02.-
Geneva : CERN, 2016-04-14 - 17 p.
- Published in : JHEP 04 (2016) 086
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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564.
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First Look at the Physics Case of the FCC-ee (TLEP)
/ Janot, Patrick (CERN) ; Bicer, M (Ankara University) ; Yildiz, Duran (University of Ankara (TR)) ; Yildiz, I (Middle East Technical University) ; Coignet, Guy (Centre National de la Recherche Scientifique (FR)) ; Delmastro, Marco (Centre National de la Recherche Scientifique (FR)) ; Alexopoulos, Theodoros (National Technical Univ. of Athens (GR)) ; Grojean, Christophe (Deutsches Elektronen-Synchrotron (DE)) ; Antusch, Stefan (Basel University) ; Sen, T (Fermilab) et al.
The discovery by the ATLAS and CMS experiments of a new boson with mass around 125 GeV and with measured properties compatible with those of a Standard-Model Higgs boson, coupled with the absence of discoveries of phenomena beyond the Standard Model at the TeV scale, has triggered interest in ideas for future Higgs factories. A new circular e+e- collider hosted in a 80 to 100 km tunnel, TLEP, is among the most attractive solutions proposed so far. [...]
CERN-ACC-2016-006.-
Geneva : CERN, 2014 - 50 p.
- Published in : J. High Energy Phys. 01 (2014) 164
Springer Open Access article: PDF;
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566.
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The NANOGrav Nine-year Data Set: Monitoring Interstellar Scattering Delays
/ Levin, Lina ; McLaughlin, Maura A ; Jones, Glenn ; Cordes, James M ; Stinebring, Daniel R ; Chatterjee, Shami ; Dolch, Timothy ; Lam, Michael T ; Lazio, T Joseph W ; Palliyaguru, Nipuni et al.
We report on an effort to extract and monitor interstellar scintillation parameters in regular timing observations collected for the NANOGrav pulsar timing array. [...]
arXiv:1601.04490.
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2016. - 14 p.
Preprint
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569.
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The Price of an Electroweak Monopole
/ Ellis, John (King's Coll. London ; CERN) ; Mavromatos, Nick E. (King's Coll. London ; CERN) ; You, Tevong (Cambridge U., DAMTP)
In a recent paper, Cho, Kim and Yoon (CKY) have proposed a version of the SU(2) $\times$ U(1) Standard Model with finite-energy monopole and dyon solutions. The CKY model postulates that the effective U(1) gauge coupling $\to \infty$ very rapidly as the Englert-Brout-Higgs vacuum expectation value $\to 0$, but in a way that is incompatible with LHC measurements of the Higgs boson $H \to \gamma \gamma$ decay rate. [...]
KCL-PH-TH-2016-04; LCTS-2016-03; CERN-TH-2016-026; CAVENDISH-HEP-16-02; DAMTP-2016-20; arXiv:1602.01745; KCL-PH-TH-2016-04; LCTS-2016-03; CERN-TH-2016-026; CAVENDISH-HEP-16-02; DAMTP-2016-20.-
Geneva : CERN, 2016-05-10 - 7 p.
- Published in : Phys. Lett. B 756 (2016) 29-35
Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Preprint: PDF; External link: Preprint
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572.
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The International Pulsar Timing Array: First Data Release
/ Verbiest, J P W ; Lentati, L ; Hobbs, G ; van Haasteren, R ; Demorest, P B ; Janssen, G H ; Wang, J -B ; Desvignes, G ; Caballero, R N ; Keith, M J et al.
The highly stable spin of neutron stars can be exploited for a variety of (astro-)physical investigations. [...]
arXiv:1602.03640.
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2016. - 25 p.
Preprint
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575.
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From Spin Noise to Systematics: Stochastic Processes in the First International Pulsar Timing Array Data Release
/ Lentati, L ; Shannon, R M ; Coles, W A ; Verbiest, J P W ; van Haasteren, R ; Ellis, J A ; Caballero, R N ; Manchester, R N ; Arzoumanian, Z ; Babak, S et al.
We analyse the stochastic properties of the 49 pulsars that comprise the first International Pulsar Timing Array (IPTA) data release. [...]
arXiv:1602.05570.
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2016. - 29 p.
Preprint
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579.
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The NANOGrav Nine-year Data Set: Mass and Geometric Measurements of Binary Millisecond Pulsars
/ Fonseca, Emmanuel ; Pennucci, Timothy T ; Ellis, Justin A ; Stairs, Ingrid H ; Nice, David J ; Ransom, Scott M ; Demorest, Paul B ; Arzoumanian, Zaven ; Crowter, Kathryn ; Dolch, Timothy et al.
We analyse 24 binary radio pulsars in the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) nine-year data set. [...]
arXiv:1603.00545.
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2016. - 23 p.
Preprint
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580.
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Neutrino Factory
/ Bogomilov, M (Sofiya U.) ; Matev, R (Sofiya U.) ; Tsenov, R (Sofiya U.) ; Dracos, M (Strasbourg, IPHC) ; Bonesini, M (INFN, Milan Bicocca) ; Palladino, V (INFN, Naples ; Naples U.) ; Tortora, L (INFN, Rome) ; Mori, Y (Kyoto U., KURRI) ; Planche, T (Kyoto U., KURRI) ; Lagrange, J B (Kyoto U., KURRI) et al.
The properties of the neutrino provide a unique window on physics beyond that described by the standard model. The study of subleading effects in neutrino oscillations, and the race to discover CP-invariance violation in the lepton sector, has begun with the recent discovery that $\theta_{13} > 0$. [...]
FERMILAB-PUB-14-555-AD-APC.-
2014 - 14 p.
- Published in : Phys. Rev. Spec. Top. Accel. Beams 17 (2014) 121002
APS Open Access article: PDF;
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581.
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Photon Mass Limits from Fast Radio Bursts
/ Bonetti, Luca (Orleans U. ; LPCE, Orleans) ; Ellis, John (King's Coll. London ; CERN) ; Mavromatos, Nikolaos E. (King's Coll. London ; CERN) ; Sakharov, Alexander S. (New York U. ; Manhattan Coll., Riverdale ; CERN) ; Sarkisyan-Grinbaum, Edward K.G. (CERN ; Texas U., Arlington) ; Spallicci, Alessandro D.A.M. (Orleans U. ; LPCE, Orleans)
The frequency-dependent time delays in fast radio bursts (FRBs) can be used to constrain the photon mass, if the FRB redshifts are known, but the similarity between the frequency dependences of dispersion due to plasma effects and a photon mass complicates the derivation of a limit on $m_\gamma$. The redshift of FRB 150418 has been measured to $\sim 2$% and its dispersion measure (DM) is known to $\sim 0.1$%, but the strength of the constraint on $m_\gamma$ is limited by uncertainties in the modelling of the host galaxy and the Milky Way, as well as possible inhomogeneities in the intergalactic medium (IGM). [...]
arXiv:1602.09135; KCL-PH-TH-2016-08; LCTS-2016-06; CERN-TH-2016-044; KCL-PH-TH-2016-08; LCTS-2016-06; CERN-TH-2016-044.-
Geneva : CERN, 2016-06-10 - 5 p.
- Published in : Phys. Lett. B 757 (2016) 548-552
Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; External link: Preprint
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588.
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Identification of high transverse momentum top quarks in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
/ ATLAS Collaboration
This paper presents studies of the performance of several jet-substructure techniques, which are used to identify hadronically decaying top quarks with high transverse momentum contained in large-radius jets. The efficiency of identifying top quarks is measured using a sample of top-quark pairs and the rate of wrongly identifying jets from other quarks or gluons as top quarks is measured using multijet events collected with the ATLAS experiment in 20.3 fb$^{-1}$ of 8 TeV proton-proton collisions at the Large Hadron Collider. [...]
arXiv:1603.03127; CERN-EP-2016-010; CERN-EP-2016-010.-
Geneva : CERN, 2016-06-16 - 77 p.
- Published in : JHEP 06 (2016) 093
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: arXiv:1603.03127 - PDF; perf-2015-04 - PDF; Springer Open Access article: PDF;
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593.
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Measurement of $W^{\pm}$ and $Z$-boson production cross sections in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
/ ATLAS Collaboration
Measurements of the $W^{\pm} \rightarrow \ell^{\pm} \nu$ and $Z \rightarrow \ell^+ \ell^-$ production cross sections (where $\ell^{\pm}=e^{\pm},\mu^{\pm}$) in proton-proton collisions at $\sqrt{s}=13$ TeV are presented using data recorded by the ATLAS experiment at the Large Hadron Collider, corresponding to a total integrated luminosity of 81 pb$^{-1}$ The total inclusive $W^{\pm}$-boson production cross sections times the single-lepton-flavour branching ratios are $\sigma_{W^+}^{tot}= 11.83 \pm 0.02 (stat) \pm 0.32 (sys) \pm 0.25 (lumi)$ nb and $\sigma_{W^-}^{tot} = 8.79 \pm 0.02 (stat) \pm 0.24 (sys) \pm 0.18 (lumi)$ nb for $W^+$ and $W^-$, respectively. The total inclusive $Z$-boson production cross section times leptonic branching ratio, within the invariant mass window $66 < m_{\ell\ell} < 116$ GeV, is $\sigma_{Z}^{tot} = 1.981 \pm 0.007 (stat) \pm 0.038 (sys) \pm 0.042 (lumi)$ nb. [...]
arXiv:1603.09222; CERN-EP-2016-069; CERN-EP-2016-069.-
Geneva : CERN, 2016-08-10 - 21 p.
- Published in : Phys. Lett. B 759 (2016) 601-621
Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint
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596.
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Radioactive Iron Rain: Transporting $^{60}$Fe in Supernova Dust to the Ocean Floor
/ Fry, Brian J. (Illinois U., Urbana, Astron. Dept.) ; Fields, Brian D. (Illinois U., Urbana, Astron. Dept.) ; Ellis, John R. (King's Coll. London ; CERN)
Several searches have found evidence of $^{60}$Fe deposition, presumably from a near-Earth supernova (SN), with concentrations that vary in different locations on Earth. This paper examines various influences on the path of interstellar dust carrying $^{60}$Fe from a SN through the heliosphere, with the aim of estimating the final global distribution on the ocean floor. [...]
arXiv:1604.00958; KCL-PH-TH-2016-15; LCTS-2016-09; CERN-TH-2016-076; KCL-PH-TH-2016-15; LCTS-2016-09; CERN-TH-2016-076.-
Geneva : CERN, 2016 - 18 p.
- Published in : Astrophys. J. 827 (2016) 48
Fulltext: PDF; External link: Preprint
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599.
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PSR J1024-0719: A Millisecond Pulsar in an Unusual Long-Period Orbit
/ Kaplan, D L ; Kupfer, T ; Nice, D J ; Irrgang, A ; Heber, U ; Arzoumanian, Z ; Beklen, E ; Crowter, K ; DeCesar, M E ; Demorest, P B et al.
PSR J1024$-$0719 is a millisecond pulsar that was long thought to be isolated. [...]
arXiv:1604.00131.
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2016. - 14 p.
Preprint
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612.
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$W_\infty$ Algebras, Hawking Radiation and Information Retention by Stringy Black Holes
/ Ellis, John (CERN ; King's Coll. London) ; Mavromatos, Nick E. (King's Coll. London ; CERN) ; Nanopoulos, Dimitri V. (Athens Academy ; HARC, Woodlands ; Texas A-M)
We have argued previously, based on the analysis of two-dimensional stringy black holes, that information in stringy versions of four-dimensional Schwarzschild black holes (whose singular regions are represented by appropriate Wess-Zumino-Witten models) is retained by quantum $W$-symmetries when the horizon area is not preserved due to Hawking radiation. It is key that the exactly-marginal conformal world-sheet operator representing a massless stringy particle interacting with the black hole requires a contribution from $W_\infty$ generators in its vertex function. [...]
arXiv:1605.01653; CERN-TH-2016-105; CERN-TH-2016-105.-
Geneva Geneva : CERN, CERN, 2016-07-05 - 19 p.
- Published in : Phys. Rev. D 94 (2016) 025007
APS Open Access article: PDF; Fulltext: 10.1103_PhysRevD.94.025007 - PDF; arXiv:1605.01653 - PDF; External link: Preprint
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621.
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Measurement of the relative width difference of the $B^0$--$\bar B^0$ system with the ATLAS detector
/ ATLAS Collaboration
This paper presents the measurement of the relative width difference $\Delta \Gamma_d / \Gamma_d$ of the $B^0$--$\bar B^0$ system using the data collected by the ATLAS experiment at the LHC in $p p$ collisions at $\sqrt{s} = 7$ TeV and $\sqrt{s} = 8$ TeV and corresponding to an integrated luminosity of 25.2 fb$^{-1}$. The value of $\Delta \Gamma_d / \Gamma_d$ is obtained by comparing the decay-time distributions of $B^0 \to J/\psi K_S$ and $B^0 \to J/\psi K^{*0}(892)$ decays. [...]
arXiv:1605.07485; CERN-EP-2016-085.-
Geneva : CERN, 2016-06-14 - 38 p.
- Published in : JHEP 06 (2016) 081
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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626.
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A deep ALMA image of the Hubble Ultra Deep Field
/ Dunlop, J S ; McLure, R J ; Biggs, A D ; Geach, J E ; Michalowski, M J ; Ivison, R J ; Rujopakarn, W ; van Kampen, E ; Kirkpatrick, A ; Pope, A et al.
We present the results of the first, deep ALMA imaging covering the full 4.5 sq arcmin of the Hubble Ultra Deep Field (HUDF) as previously imaged with WFC3/IR on HST. [...]
arXiv:1606.00227.
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2016. - 25 p.
Preprint
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631.
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Higgs Inflation, Reheating and Gravitino Production in No-Scale Supersymmetric GUTs
/ Ellis, John (King's Coll. London ; CERN) ; He, Hong-Jian (Tsinghua U., Beijing, CHEP ; Peking U., CHEP) ; Xianyu, Zhong-Zhi (Harvard U., Dept. Math. ; Harvard U., Phys. Dept.)
We extend our previous study of supersymmetric Higgs inflation in the context of no-scale supergravity and grand unification, to include models based on the flipped SU(5) and the Pati-Salam group. Like the previous SU(5) GUT model, these yield a class of inflation models whose inflation predictions interpolate between those of the quadratic chaotic inflation and Starobinsky-like inflation, while also avoiding tension with proton decay limits. [...]
arXiv:1606.02202; KCL-PH-TH-2016-33; CERN-TH-2016-134; KCL-PH-TH-2016-33; CERN-TH-2016-134.-
2016-08-30 - 21 p.
- Published in : JCAP 08 (2016) 068
Article from SCOAP3: PDF; Fulltext: 10.1088_1475-7516_2016_08_068 - PDF; arXiv:1606.02202 - PDF; IOP Open Access article: PDF; External link: Preprint
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632.
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Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC $pp$ collision data at $\sqrt{s}=$ 7 and 8 TeV
/ ATLAS and CMS Collaborations
Combined ATLAS and CMS measurements of the Higgs boson production and decay rates, as well as constraints on its couplings to vector bosons and fermions, are presented. The combination is based on the analysis of five production processes, namely gluon fusion, vector boson fusion, and associated production with a $W$ or a $Z$ boson or a pair of top quarks, and of the six decay modes $H \to ZZ, WW$, $\gamma\gamma, \tau\tau, bb$, and $\mu\mu$. [...]
arXiv:1606.02266; CERN-EP-2016-100; ATLAS-HIGG-2015-07; CMS-HIG-15-002; CERN-EP-2016-100; ATLAS-HIGG-2015-07; CMS-HIG-15-002.-
Geneva : CERN, 2016-08-05 - 70 p.
- Published in : JHEP 08 (2016) 045
Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF;
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636.
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Lyman-alpha and CIII] Emission in z=7-9 Galaxies: Accelerated Reionization Around Luminous Star Forming Systems?
/ Stark, Daniel P ; Ellis, Richard S ; Charlot, Stephane ; Chevallard, Jacopo ; Tang, Mengtao ; Belli, Sirio ; Zitrin, Adi ; Mainali, Ramesh ; Gutkin, Julia ; Vidal-Garcia, Alba et al.
We discuss new Keck/MOSFIRE spectroscopic observations of four luminous galaxies at z~7-9 selected to have intense optical line emission by Roberts-Borsani et al. [...]
arXiv:1606.01304.
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2016. - 13 p.
Preprint
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637.
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Options for UK Technetium-99m Production using Accelerators
/ H.L. Owen (Cockcroft Inst. Accel. Sci. Tech. ; U. Manchester (main)) ; Ballinger, J. (King's Coll. London (main)) ; Buscombe, J. ; Clarke, R. (Rutherford) ; Denton, E. ; Ellis, B. ; Flux, G. (London, Royal Marsden Hospital) ; Fraser, L. ; Neilly, B. ; Paterson, A. et al.
Recent and ongoing shortages in reactor-based supplies of molybdenum-99 for hospital production of the important medical radioisotope Technetium-99m have prompted the re-examination of the alternative production methods using conventional and laser-based particle accelerators. At present the UK has no domestic source of molybdenum-99 and relies exclusively on overseas supply; the National Health Service, with professional partners, is therefore examining the options for domestic production of molybdenum-99 and/or technetium-99m to increase security of supply. [...]
CERN-ACC-2016-0071.-
Geneva : CERN, 2014
- Published in :
Fulltext: PDF;
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.THOAB02
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638.
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Beyond the Standard Model phenomena
/ Golling, T. (U. Geneva (main)) ; Hance, M. (UC, Santa Cruz (main)) ; Harris, P. (CERN) ; Mangano, M.L. (CERN) ; McCullough, M. (CERN) ; Moortgat, F. (CERN) ; Schwaller, P. (DESY) ; Torre, R. (IPT, Lausanne) ; Agrawal, P (Harvard U., Phys. Dept.) ; Alves, D.S.M. (New York U., CCPP ; Princeton U.) et al.
This report summarises the physics opportunities in the search and study of physics beyond the Standard Model at a 100 TeV pp collider..
arXiv:1606.00947; CERN-TH-2016-111; CERN-TH-2016-111; CERN-ATS-2016-004.-
2017-06-22 - 197 p.
- Published in : 10.23731/CYRM-2017-003.441
Fulltext: fermilab-pub-16-296-t - PDF; arXiv:1606.00947 - PDF; Fulltext from publisher: PDF; Published version from CERN: PDF;
In : Physics at the FCC-hh, a 100 TeV $pp$ collider, pp.441-634
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639.
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Multicore fibre technology - the road to multimode photonics
/ Bland-Hawthorn, Joss (U Sydney) ; Min, Seong-Sik (U Sydney) ; Lindley, Emma (U Sydney) ; Leon-Saval, Sergio (U Sydney) ; Ellis, Simon (AAO) ; Lawrence, John (AAO) ; Roth, Martin (Leibniz Institute) ; Lohmannsroben, Hans-Gerd (U Potsdam) ; Veilleux, Sylvain (U Maryland)
For the past forty years, optical fibres have found widespread use in ground-based and space-based instruments. In most applications, these fibres are used in conjunction with conventional optics to transport light. [...]
arXiv:1606.00969.-
2016 - 14 p.
External link: Preprint
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641.
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Measurement of the double-differential high-mass Drell--Yan cross section in $pp$ collisions at $\sqrt{s}= 8$ TeV with the ATLAS detector
/ ATLAS Collaboration
This paper presents a measurement of the double-differential cross section for the Drell--Yan $Z/\gamma^*\rightarrow \ell^+\ell^-$ and photon-induced $\gamma \gamma \rightarrow \ell^+\ell^-$ processes where $\ell$ is an electron or muon. The measurement is performed for invariant masses of the lepton pairs, $m_{\ell\ell}$, between $116$ GeV and $1500$ GeV, using a sample of $20.3$ fb$^{-1}$ of $pp$ collisions data at centre-of-mass energy of $\sqrt{s}=8$ TeV collected by the ATLAS detector at the LHC in 2012. The data are presented double differentially in invariant mass and absolute dilepton rapidity as well as in invariant mass and absolute pseudorapidity separation of the lepton pair. The single-differential cross section as a function of $m_{\ell\ell}$ is also reported. [...]
arXiv:1606.01736; CERN-EP-2016-079.-
Geneva : CERN, 2016-08-01 - 61 p.
- Published in : JHEP 08 (2016) 009
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Rivet analyses reference
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646.
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Searches for heavy diboson resonances in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
/ ATLAS Collaboration
Searches for new heavy resonances decaying to $WW$, $WZ$, and $ZZ$ bosons are presented, using a data sample corresponding to 3.2 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}=13$ TeV collected with the ATLAS detector at the CERN Large Hadron Collider. Analyses selecting $\nu\nu qq$, $\ell\nu qq$, $\ell\ell qq$ and $qqqq$ final states are combined, searching for a narrow-width resonance with mass between 500 and 3000 GeV. [...]
arXiv:1606.04833; CERN-EP-2016-106; CERN-EP-2016-106.-
Geneva : CERN, 2016-09-29 - 46 p.
- Published in : JHEP 09 (2016) 173
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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657.
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Measurement of forward-backward multiplicity correlations in lead-lead, proton-lead, and proton-proton collisions with the ATLAS detector
/ ATLAS Collaboration
Two-particle pseudorapidity correlations are measured in $\sqrt{s_{\rm{NN}}}$ = 2.76 TeV Pb+Pb, $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV $p$+Pb, and $\sqrt{s}$ = 13 TeV $pp$ collisions at the LHC, with total integrated luminosities of approximately 7 $\mu\mathrm{b}^{-1}$, 28 $\mathrm{nb}^{-1}$, and 65 $\mathrm{nb}^{-1}$, respectively. The correlation function $C_{\rm N}(\eta_1,\eta_2)$ is measured as a function of event multiplicity using charged particles in the pseudorapidity range $|\eta|<2.4$. [...]
arXiv:1606.08170; CERN-EP-2016-124; CERN-PH-EP-2016-124; CERN-EP-2016-124.-
Geneva : CERN, 2017-06-28 - 30 p.
- Published in : Phys. Rev. C 95 (2017) 064914
APS Open Access Article: PDF; Fulltext: PDF; External links: Preprint; Previous draft version
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660.
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Search for Higgs and $Z$ Boson Decays to $\phi\,\gamma$ with the ATLAS Detector
/ ATLAS Collaboration
A search for the decays of the Higgs and $Z$ bosons to a $\phi$ meson and a photon is performed with a $pp$ collision data sample corresponding to an integrated luminosity of $2.7\,\mathrm{fb}^{-1}$ collected at $\sqrt{s}=13\mathrm{TeV}$ with the ATLAS detector at the LHC. No significant excess of events is observed above the background, and 95% confidence level upper limits on the branching fractions of the Higgs and $Z$ boson decays to $\phi\,\gamma$ of $1.4\times10^{-3}$ and $8.3\times10^{-6}$, respectively, are obtained..
arXiv:1607.03400; CERN-EP-2016-130.-
Geneva : CERN, 2016-09-09 - 19 p.
- Published in : Phys. Rev. Lett. 117 (2016) 111802
APS Open Access article: PDF; Fulltext: 10.1103_PhysRevLett.117.111802 - PDF; arXiv:1607.03400 - PDF; External links: Previous draft version; Preprint
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668.
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Towards the next generation of simplified Dark Matter models
/ Albert, Andreas (Aachen, Tech. Hochsch.) ; Bauer, Martin (Heidelberg U.) ; Brooke, Jim (Bristol U.) ; Buchmueller, Oliver (Imperial Coll., London) ; Cerdeño, David G. (Durham U.) ; Citron, Matthew (Imperial Coll., London) ; Davies, Gavin (Imperial Coll., London) ; De Cosa, Annapaola (Zurich U.) ; De Roeck, Albert (CERN ; Antwerp U.) ; De Simone, Andrea (INFN, Trieste) et al.
This White Paper is an input to the ongoing discussion about the extension and refinement of simplified Dark Matter (DM) models. Based on two concrete examples, we show how existing simplified DM models (SDMM) can be extended to provide a more accurate and comprehensive framework to interpret and characterise collider searches. [...]
arXiv:1607.06680.-
2017-06 - 22 p.
- Published in : Phys. Dark Universe 16 (2017) 49-70
Fulltext: PDF; External link: Preprint
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670.
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Prime Focus Spectrograph (PFS) for the Subaru Telescope: Overview, recent progress, and future perspectives
/ Tamura, Naoyuki ; Takato, Naruhisa ; Shimono, Atsushi ; Moritani, Yuki ; Yabe, Kiyoto ; Ishizuka, Yuki ; Ueda, Akitoshi ; Kamata, Yukiko ; Aghazarian, Hrand ; Arnouts, Stephane et al.
PFS (Prime Focus Spectrograph), a next generation facility instrument on the 8.2-meter Subaru Telescope, is a very wide-field, massively multiplexed, optical and near-infrared spectrograph. [...]
arXiv:1608.01075.
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2016. - 17 p.
Preprint
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677.
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The Super-GUT CMSSM Revisited
/ Ellis, John (CERN ; King's Coll. London) ; Evans, Jason L. (Korea Inst. Advanced Study, Seoul) ; Mustafayev, Azar (Minnesota U., Theor. Phys. Inst.) ; Nagata, Natsumi (Minnesota U., Theor. Phys. Inst.) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
We revisit minimal supersymmetric SU(5) grand unification (GUT) models in which the soft supersymmetry-breaking parameters of the minimal supersymmetric Standard Model (MSSM) are universal at some input scale, $M_{in}$, above the supersymmetric gauge coupling unification scale, $M_{GUT}$. As in the constrained MSSM (CMSSM), we assume that the scalar masses and gaugino masses have common values, $m_0$ and $m_{1/2}$ respectively, at $M_{in}$, as do the trilinear soft supersymmetry-breaking parameters $A_0$. [...]
arXiv:1608.05370; KCL-PH-TH-2016-52; KIAS-P16059; UMN-TH-3601-16; FTPI-MINN-16-23; CERN-TH-2016-185; KCL-PH-TH-2016-52; KIAS-P16059; UMN-TH-3601-16; FTPI-MINN-16-23; CERN-TH-2016-185.-
2016-10-28 - 30 p.
- Published in : Eur. Phys. J. C 76 (2016) 592
Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF;
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679.
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A hard ionizing spectrum in z=3-4 Ly-alpha emitters with intense [OIII] emission: Analogs of galaxies in the reionization era?
/ Nakajima, Kimihiko ; Ellis, Richard S ; Iwata, Ikuru ; Inoue, Akio ; Kusakabe, Haruka ; Ouchi, Masami ; Robertson, Brant
We present Keck/MOSFIRE spectra of the diagnostic nebular emission lines [OIII]5007,4959, [OII]3727, and H-beta for a sample of 15 redshift z=3.1-3.7 Ly-alpha emitters (LAEs) and Lyman break galaxies (LBGs). [...]
arXiv:1608.08222.
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2016. - 7 p.
Preprint
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680.
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La ciencia del cosmos, la ciencia en el cosmos : 2013-2014 : ciclo de conferencias de astrofisica y cosmologia - Science of the Cosmos, Science in the Cosmos : 2013-2014 : series of lectures on astrophysics and cosmology
2013-2014
- Madrid, Spain
/ Achucarro, Ana (ed.)
Bienvenidos a La ciencia del cosmos, la ciencia en el cosmos, el ciclo de conferencias que la Fundacion BBVA ofrece, tambien en DVD, desde marzo de 2011. Conferencia 1 : Hagase la luz : el hallazgo de las primeras galaxias / Richard Ellis ; conferencia 2 : El origen de la galaxias / Simon Wite ; conferencia 3 : Astrobiologia : la busqueda de condiciones para la vida en el universo / Gerda Horneck ; conferencia 4 : la estabilidad a largo plazo de los sistemas planetarios / Scott Tremaine ; conferencia 5 : Astrosismologia : el estudio de los seismos estelares y su impacto en la astrofisica / Conny Aerts ; conferencia 6 : De Marte al multiverso / Martin Rees
Bilbao : Fundacion BBVA, 2014 - 2 DVD.
CERN library copies
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688.
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A Historical Profile of the Higgs Boson
/ Ellis, John (King's Coll. London ; CERN) ; Gaillard, Mary K (LBL, Berkeley) ; Nanopoulos, V (Texas A-M ; Athens Academy)
The Higgs boson was postulated in 1964, and phenomenological studies of its possible production and decays started in the early 1970s, followed by studies of its possible production in e+ e−, and pp collisions, in particular. Until recently, the most sensitive searches for the Higgs boson were at LEP between 1989 and 2000, which were complemented by searches at the Fermilab Tevatron. [...]
2016
World Scientific Open Access article: PDF;
In : The standard theory of particle physics, pp.255-274
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693.
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The NANOGrav Nine-Year Data Set: Excess Noise in Millisecond Pulsar Arrival Times
/ Lam, M T ; Cordes, J M ; Chatterjee, S ; Arzoumanian, Z ; Crowter, K ; Demorest, P B ; Dolch, T ; Ellis, J A ; Ferdman, R D ; Fonseca, E et al.
Gravitational wave astronomy using a pulsar timing array requires high-quality millisecond pulsars, correctable interstellar propagation delays, and high-precision measurements of pulse times of arrival. [...]
arXiv:1610.01731.
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2016. - 20 p.
Preprint
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697.
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Search for triboson $W^{\pm}W^{\pm}W^{\mp}$ production in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
/ ATLAS Collaboration
This paper reports a search for triboson $W^{\pm}W^{\pm}W^{\mp}$ production in two decay channels ($W^{\pm}W^{\pm}W^{\mp}\rightarrow \ell^{\pm}\nu\ell^{\pm}\nu\ell^{\mp}\nu$ and $W^{\pm}W^{\pm}W^{\mp}\rightarrow \ell^{\pm}\nu\ell^{\pm}\nu jj$ with $\ell=e, \mu$) in proton-proton collision data corresponding to an integrated luminosity of 20.3 fb$^{-1}$ at a centre of-mass energy of 8 TeV with the ATLAS detector at the Large Hadron Collider. Events with exactly three charged leptons, or two leptons with the same electric charge in association with two jets, are selected. [...]
arXiv:1610.05088; CERN-EP-2016-172; CERN-EP-2016-172.-
Geneva : CERN, 2017-03-02 - 39 p.
- Published in : Eur. Phys. J. C 77 (2017) 141
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Rivet analyses reference
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700.
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Measurements of charge and CP asymmetries in $b$-hadron decays using top-quark events collected by the ATLAS detector in $pp$ collisions at $\sqrt{s}=8$ TeV
/ ATLAS Collaboration
Same- and opposite-sign charge asymmetries are measured in lepton+jets $t\bar{t}$ events in which a $b$-hadron decays semileptonically to a soft muon, using data corresponding to an integrated luminosity of 20.3 $fb^{-1}$ from proton--proton collisions at a centre-of-mass energy of $\sqrt{s}=8$ TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. The charge asymmetries are based on the charge of the lepton from the top-quark decay and the charge of the soft muon from the semileptonic decay of a $b$-hadron and are measured in a fiducial region corresponding to the experimental acceptance. [...]
arXiv:1610.07869; CERN-EP-2016-221.-
Geneva : CERN, 2017-02-07 - 47 p.
- Published in : JHEP 02 (2017) 071
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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703.
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The DESI Experiment Part II: Instrument Design
/ DESI Collaboration
DESI (Dark Energy Spectropic Instrument) is a Stage IV ground-based dark energy experiment that will study baryon acoustic oscillations and the growth of structure through redshift-space distortions with a wide-area galaxy and quasar redshift survey. [...]
arXiv:1611.00037.
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2016.
Preprint
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705.
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Likelihood Analysis of Supersymmetric SU(5) GUTs
/ Bagnaschi, E. (DESY) ; Costa, J.C. (Imperial Coll., London) ; Sakurai, K. (Durham U., IPPP ; Warsaw U.) ; Borsato, M. (Santiago de Compostela U.) ; Buchmueller, O. (Imperial Coll., London) ; Cavanaugh, R. (Fermilab ; Illinois U., Chicago) ; Chobanova, V. (Santiago de Compostela U.) ; Citron, M. (Imperial Coll., London) ; De Roeck, A. (CERN ; Antwerp U.) ; Dolan, M.J. (Melbourne U.) et al.
We perform a likelihood analysis of the constraints from accelerator experiments and astrophysical observations on supersymmetric (SUSY) models with SU(5) boundary conditions on soft SUSY-breaking parameters at the GUT scale. The parameter space of the models studied has 7 parameters: a universal gaugino mass $m_{1/2}$, distinct masses for the scalar partners of matter fermions in five- and ten-dimensional representations of SU(5), $m_5$ and $m_{10}$, and for the $\mathbf{5}$ and $\mathbf{\bar 5}$ Higgs representations $m_{H_u}$ and $m_{H_d}$, a universal trilinear soft SUSY-breaking parameter $A_0$, and the ratio of Higgs vevs $\tan \beta$. [...]
arXiv:1610.10084; KCL-PH-TH-2016-57; CERN-TH-2016-217; DESY-16-156; IIFT-UAM-CSIC-16-105; FTPI-MINN-16-29; UMN-TH-3609-16; IPPP-16-97; CERN-PH-TH-2016-217; IFT-UAM-CSIC-16-105; FERMILAB-PUB-16-453-CMS.-
Geneva : CERN, 2017-02-16 - 36 p.
- Published in : Eur. Phys. J. C 77 (2017) 104
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: fermilab-pub-16-453-cms - PDF; arXiv:1610.10084 - PDF; Springer Open Access article: PDF; External link: Fermilab Library Server (fulltext available)
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710.
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Performance of the ATLAS Trigger System in 2015
/ ATLAS Collaboration
During 2015 the ATLAS experiment recorded $3.8 \mathrm{fb}^{-1}$ of proton--proton collision data at a centre-of-mass energy of $13 \mathrm{TeV}$. The ATLAS trigger system is a crucial component of the experiment, responsible for selecting events of interest at a recording rate of approximately 1 kHz from up to 40 MHz of collisions. [...]
arXiv:1611.09661; CERN-EP-2016-241.-
Geneva : CERN, 2017-05-18 - 76 p.
- Published in : Eur. Phys. J. C
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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712.
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Measurement of the prompt $J/\psi$ pair production cross-section in pp collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector
/ ATLAS Collaboration
The production of two prompt $J/\psi$ mesons, each with transverse momenta $p_{\mathrm{T}}>8.5$ GeV and rapidity $|y| < 2.1$, is studied using a sample of proton-proton collisions at $\sqrt{s} = 8$ TeV, corresponding to an integrated luminosity of 11.4 fb$^{-1}$ collected in 2012 with the ATLAS detector at the LHC. The differential cross-section, assuming unpolarised $J/\psi$ production, is measured as a function of the transverse momentum of the lower-$p_{\mathrm{T}}$ $J/\psi$ meson, di-$J/\psi$ $p_{\mathrm{T}}$ and mass, the difference in rapidity between the two $J/\psi$ mesons, and the azimuthal angle between the two $J/\psi$ mesons. [...]
arXiv:1612.02950; CERN-EP-2016-211.-
Geneva : CERN, 2017-02-07 - 53 p.
- Published in : Eur. Phys. J. C 77 (2017) 76
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF;
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715.
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Likelihood Analysis of the Minimal AMSB Model
/ Bagnaschi, E. (DESY) ; Borsato, M. (Santiago de Compostela U.) ; Sakurai, K. (Durham U., Dept. of Math. ; Durham U., IPPP ; Warsaw U.) ; Buchmueller, O. (Imperial Coll., London) ; Cavanaugh, R. (Fermilab ; Illinois U., Chicago) ; Chobanova, V. (Santiago de Compostela U.) ; Citron, M. (Imperial Coll., London) ; Costa, J.C. (Imperial Coll., London) ; De Roeck, A. (CERN ; Antwerp U.) ; Dolan, M.J. (Melbourne U.) et al.
We perform a likelihood analysis of the minimal Anomaly-Mediated Supersymmetry Breaking (mAMSB) model using constraints from cosmology and accelerator experiments. We find that a wino-like or a Higgsino-like neutralino LSP, $m_{\tilde \chi^0_{1}}$, may provide the cold dark matter (DM) with similar likelihood. [...]
arXiv:1612.05210; FERMILAB-PUB-16-502-CMS; DESY-16-155; KCL-PH-TH-2016-58; CERN-TH-2016-220; IFT-UAM-CSIC-16-112; IPMU16-0157; FTPI-MINN-16-30; UMN-TH-3610-16; IPPP-16-104.-
2017-04-27 - 28 p.
- Published in : Eur. Phys. J. C 77 (2017) 268
Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF;
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721.
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Review of Particle Physics, 2016-2017
/ Patrignani, C (Bologna U. ; INFN, Bologna) ; Agashe, K (Maryland U.) ; Aielli, G (U. Rome 2, Tor Vergata (main)) ; Amsler, C (U. Bern, AEC ; Stefan Meyer Inst. Subatomare Phys.) ; Antonelli, M (Frascati) ; Asner, D M (PNL, Richland) ; Baer, H (Oklahoma U.) ; Banerjee, Sw (U. Louisville) ; Barnett, R M (LBL, Berkeley) ; Basaglia, T (CERN) et al.
/Particle Data Group
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,062 new measurements from 721 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. [...]
2016 - 1808 p.
- Published in : Chin. Phys. C 40 (2016) 100001
IOP Open Access article: PDF;
- Please contact the library if you need to access this document.
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724.
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Dimension-6 Operator Analysis of the CLIC Sensitivity to New Physics
/ Ellis, John (King's Coll. London ; CERN) ; Roloff, Philipp (CERN) ; Sanz, Veronica (Sussex U.) ; You, Tevong (Cambridge U.)
We estimate the possible accuracies of measurements at the proposed CLIC $e^+e^-$ collider of Higgs and $W^+W^-$ production at centre-of-mass energies up to 3TeV, incorporating also Higgsstrahlung projections at higher energies that had not been considered previously, and use them to explore the prospective CLIC sensitivities to decoupled new physics. We present the resulting constraints on the Wilson coefficients of dimension-6 operators in a model-independent approach based on the Standard Model effective field theory (SM EFT). [...]
arXiv:1701.04804; KCL-PH-TH-2017-04; CERN-TH-2017-009; CAVENDISH-HEP-17-01; CERN-PH-TH-2017-009; DAMTP-2017-01.-
2017-05-17 - 20 p.
- Published in : JHEP 05 (2017) 096
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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725.
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FRB 121102 Casts New Light on the Photon Mass
/ Bonetti, Luca (Orleans U. ; LPC2E, Orleans) ; Ellis, John (King's Coll. London ; CERN) ; Mavromatos, Nikolaos E. (King's Coll. London ; CERN) ; Sakharov, Alexander S. (New York U. ; Manhattan Coll., Riverdale ; CERN) ; Sarkisyan-Grinbaum, Edward K. (CERN ; Texas U., Arlington) ; Spallicci, Alessandro D. A. M. (Orleans U. ; LPC2E, Orleans)
The photon mass, $m_\gamma$, can in principle be constrained using measurements of the dispersion measures (DMs) of fast radio bursts (FRBs), once the FRB redshifts are known. The DM of the repeating FRB 121102 is known to $< 1$\%, a host galaxy has now been identified with high confidence,and its redshift, $z$, has now been determined with high accuracy: $z = 0.19273(8)$. [...]
arXiv:1701.03097; KCL-PH-TH-2017-01; CERN-TH-2017-007.-
2017-05-10 - 4 p.
- Published in : Phys. Lett. B 768 (2017) 326-329
Article from SCOAP3: PDF; Fulltext: PDF;
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726.
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Measurement of the $W$-boson mass in pp collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
/ ATLAS Collaboration
A measurement of the mass of the $W$ boson is presented based on proton-proton collision data recorded in 2011 at a centre-of-mass energy of 7 TeV with the ATLAS detector at the LHC, and corresponding to 4.6 fb$^{-1}$ of integrated luminosity. The selected data sample consists of $7.8 \times 10^6$ candidates in the $W\rightarrow \mu \nu$ channel and $5.9 \times 10^6$ candidates in the $W\rightarrow e \nu$ channel. [...]
arXiv:1701.07240; CERN-EP-2016-305.-
Geneva : CERN, 2018-02-06 - 86 p.
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; External link: Previous draft version
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728.
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No-Scale SU(5) Super-GUTs
/ Ellis, John (King's Coll. London ; CERN) ; Evans, Jason L. (Korea Inst. Advanced Study, Seoul) ; Nagata, Natsumi (Tokyo U.) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U.)
We reconsider the minimal SU(5) Grand Unified Theory (GUT) in the context of no-scale supergravity, assuming that the soft supersymmetry-breaking parameters satisfy universality conditions at some input scale M_in above the GUT scale M_GUT. When setting up such a no-scale super-GUT model, special attention must be paid to avoiding the Scylla of rapid proton decay and the Charybdis of an excessive density of cold dark matter, while also having an acceptable mass for the Higgs boson. [...]
arXiv:1702.00379; KCL-PH-TH-2017-05; CERN-TH-2017-010; KIAS-P17008; UT-17-03; MI-TH-1738; UMN-TH-3618-17; FTPI-MINN-17-02; ACT-01-17.-
2017-04-12 - 24 p.
- Published in : Eur. Phys. J. C 77 (2017) 232
Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF;
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732.
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Performance of the ATLAS Transition Radiation Tracker in Run 1 of the LHC: tracker properties
/ ATLAS Collaboration
The tracking performance parameters of the ATLAS Transition Radiation Tracker (TRT) as part of the ATLAS inner detector are described in this paper for different data-taking conditions in proton--proton, proton--lead and lead--lead collisions at the Large Hadron Collider (LHC). The performance is studied using data collected for different data-taking conditions in proton--proton, proton--lead and lead--lead collisions at the Large Hadron Collider (LHC). [...]
arXiv:1702.06473; CERN-EP-2016-311.-
Geneva : CERN, 2017-05-03 - 45 p.
- Published in : JINST 12 (2017) P05002
Fulltext: arXiv:1702.06473 - PDF; 10.1088_1748-0221_12_05_P05002 - PDF; External link: Previous draft version
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733.
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The ATLAS Data Acquisition and High Level Trigger system
/ Abolins, M (Michigan State U.) ; Abreu, R (CERN) ; Achenbach, R (Kirchhoff Inst. Phys.) ; Aharrouche, M (Mainz U., Inst. Phys.) ; Aielli, G (INFN, Rome ; Rome U., Tor Vergata) ; Al-Shabibi, A (CERN) ; Aleksandrov, I (Dubna, JINR) ; Alexandrov, E (Dubna, JINR) ; Allbrooke, B M (Birmingham U.) ; Aloisio, A (INFN, Naples ; Naples U.) et al.
/ATLAS TDAQ
This paper describes the data acquisition and high level trigger system of the ATLAS experiment at the Large Hadron Collider at CERN, as deployed during Run 1. Data flow as well as control, configuration and monitoring aspects are addressed. [...]
2016 - 153 p.
- Published in : JINST 11 (2016) P06008
IOP Open Access article: PDF;
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735.
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Jet reconstruction and performance using particle flow with the ATLAS Detector
/ ATLAS Collaboration
This paper describes the implementation and performance of a particle flow algorithm applied to 20.2 fb$^-1$ of ATLAS data from 8 TeV proton-proton collisions in Run 1 of the LHC. The algorithm removes calorimeter energy deposits due to charged hadrons from consideration during jet reconstruction, instead using measurements of their momenta from the inner tracker. [...]
arXiv:1703.10485; CERN-EP-2017-024.-
Geneva : CERN, 2017-07-13 - 67 p.
- Published in : Eur. Phys. J. C 77 (2017) 466
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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741.
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Anomaly-Free Dark Matter Models are not so Simple
/ Ellis, John (King's Coll. London ; CERN) ; Fairbairn, Malcolm (King's Coll. London) ; Tunney, Patrick (King's Coll. London)
We explore the anomaly-cancellation constraints on simplified dark matter (DM) models with an extra U(1)$^\prime$ gauge boson $Z'$. We show that, if the Standard Model (SM) fermions are supplemented by a single DM fermion $\chi$ that is a singlet of the SM gauge group, and the SM quarks have non-zero U(1)$^\prime$ charges, the SM leptons must also have non-zero U(1)$^\prime$ charges, in which case LHC searches impose strong constraints on the $Z'$ mass. [...]
arXiv:1704.03850; KCL-PH-TH-2017-21; CERN-TH-2017-084.-
2017-08-16 - 19 p.
- Published in : JHEP 08 (2017) 053
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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744.
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Where is Particle Physics Going?
/ Ellis, John (King's Coll. London ; CERN)
The answer to the question in the title is: in search of new physics beyond the Standard Model, for which there are many motivations, including the likely instability of the electroweak vacuum, dark matter, the origin of matter, the masses of neutrinos, the naturalness of the hierarchy of mass scales, cosmological inflation and the search for quantum gravity. So far, however, there are no clear indications about the theoretical solutions to these problems, nor the experimental strategies to resolve them [...]
arXiv:1704.02821; KCL-PH-TH-2017-18; CERN-TH-2017-080.-
2017-12-08 - 21 p.
- Published in : Int. J. Mod. Phys. A 32 (2017) 1746001
Fulltext: PDF;
In : HKUST Jockey Club Institute for Advanced Study : High Energy Physics, Hong Kong, China, 9 - 26 Jan 2017
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754.
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Anomaly-Free Models for Flavour Anomalies
/ Ellis, John (CERN ; King's Coll. London) ; Fairbairn, Malcolm (King's Coll. London) ; Tunney, Patrick (King's Coll. London)
We explore the constraints imposed by the cancellation of triangle anomalies on models in which the flavour anomalies reported by LHCb and other experiments are due to an extra U(1)' gauge boson Z'. We assume universal and rational U(1)' charges for the first two generations of left-handed quarks and of right-handed up-type quarks but allow different charges for their third-generation counterparts. [...]
arXiv:1705.03447; CERN-TH-2017-101.-
2018-03-20 - 14 p.
- Published in : Eur. Phys. J. C 78 (2018) 238
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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755.
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The ATLAS Muon-to-Central Trigger Processor Interface (MUCTPI) Upgrade
/ ATLAS Collaboration
The ATLAS Muon-to-Central Trigger Processor Interface (MUCTPI) Upgrade The Muon-to-Central Trigger Processor Interface (MUCTPI) is part of the Level-1 trigger system of the ATLAS experiment at the Large Hadron Collider (LHC) at CERN. We will describe an upgrade of the MUCTPI which will use optical input and provide full precision region-of-interest information on muon candidates to the topological trigger processor of the Level-1 trigger system. [...]
ATL-DAQ-SLIDE-2017-329.-
Geneva : CERN, 2017
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
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760.
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The ATLAS Muon-to-Central Trigger Processor Interface (MUCTPI) Upgrade
/ Spiwoks, Ralf (CERN) ; Armbruster, Aaron James (CERN) ; Carrillo-Montoya, German D. (CERN) ; Chelstowska, Magda Anna (CERN) ; Czodrowski, Patrick (CERN) ; Deviveiros, Pier-Olivier (CERN) ; Eifert, Till (CERN) ; Ellis, Nicolas (CERN) ; Galster, Gorm Aske Gram Krohn (Bohr Inst. ; CERN) ; Haas, Stefan (CERN) et al.
The Muon-to-Central Trigger Processor Interface (MUCTPI) is part of the Level-1 trigger system of the ATLAS experiment at the Large Hadron Collider (LHC) at CERN. [...]
ATL-DAQ-PROC-2017-013.
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2018. - 6 p.
Original Communication (restricted to ATLAS) - Full text
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761.
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A Novel Foamy Origin for Singlet Fermion Masses
/ Ellis, John (King's Coll. London ; CERN) ; Mavromatos, Nick E. (King's Coll. London) ; Nanopoulos, Dimitri V. (Athens Academy ; HARC, Woodlands ; Texas A-M)
We show how masses for singlet fermions can be generated by interactions with a D-particle model of space-time foam inspired by brane theory. It has been shown previously by one of the authors (N.E.M.) such interactions may generate generate dynamically small masses for charged fermions via the recoils of D-particle defects interacting with photons. [...]
arXiv:1706.04080; CERN-TH-2017-123; KCL-PH-TH-2017-29; ACT-05-17; MI-TH-1757.-
2017-10-17 - 16 p.
- Published in : Phys. Rev. D 96 (2017) 086012
Fulltext: 10.1103_PhysRevD.96.086012 - PDF; arXiv:1706.04080 - PDF;
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774.
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US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report
/ Battaglieri, Marco (INFN, Genoa) ; Belloni, Alberto (Maryland U.) ; Chou, Aaron (Fermilab) ; Cushman, Priscilla (Minnesota U.) ; Echenard, Bertrand (Caltech) ; Essig, Rouven (SUNY, Stony Brook) ; Estrada, Juan (Fermilab) ; Feng, Jonathan L. (UC, Irvine) ; Flaugher, Brenna (Fermilab) ; Fox, Patrick J. (Fermilab) et al.
This white paper summarizes the workshop "U.S. [...]
arXiv:1707.04591 ; FERMILAB-CONF-17-282-AE-PPD-T.
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2017. - 113 p.
Fermilab Library Server (fulltext available) - Symmetry Magazine article - Full text - Fulltext
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781.
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Evidence for the $H \to b\bar{b}$ decay with the ATLAS detector
/ ATLAS Collaboration
A search for the decay of the Standard Model Higgs boson into a $b\bar{b}$ pair when produced in association with a $W$ or $Z$ boson is performed with the ATLAS detector. The analysed data, corresponding to an integrated luminosity of 36.1 fb$^{-1}$, were collected in proton-proton collisions in Run 2 of the Large Hadron Collider at a centre-of-mass energy of 13 TeV. [...]
arXiv:1708.03299; CERN-EP-2017-175.-
Geneva : CERN, 2017-12-06 - 68 p.
- Published in : JHEP 12 (2017) 024
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; External link: Previous draft version
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782.
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Search for direct top squark pair production in final states with two leptons in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS detector
/ ATLAS Collaboration
The results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb$^{-1}$ of integrated luminosity from proton--proton collisions at $\sqrt{s}=13$ TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark $\tilde{t}$ and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay $\tilde{t} \rightarrow b \tilde{\chi}_{1}^{\pm}$ into a $b$-quark and the lightest chargino with $\tilde{\chi}_{1}^{\pm} \rightarrow W \tilde{\chi}_{1}^{0}$, the decay $\tilde{t} \rightarrow t \tilde{\chi}_{1}^{0}$ into an on-shell top quark and the lightest neutralino, the three-body decay $\tilde{t} \rightarrow b W \tilde{\chi}_{1}^{0}$ and the four-body decay $\tilde{t} \rightarrow b \ell \nu \tilde{\chi}_{1}^{0}$. [...]
arXiv:1708.03247; CERN-EP-2017-150.-
Geneva : CERN, 2017-12-22 - 44 p.
- Published in : Eur. Phys. J. C 77 (2017) 898
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; External link: Previous draft version
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802.
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First level trigger systems for LHC experiments
/ Brawn, I (Birmingham U.) ; Carney, R E (Birmingham U.) ; Connors, A (Birmingham U.) ; Garvey, J (Birmingham U.) ; Grant, D (Birmingham U.) ; Harris, R (Birmingham U.) ; Hillier, S (Birmingham U.) ; Jovanovic, P (Birmingham U.) ; McGill, I (Birmingham U.) ; Rees, D (Birmingham U.) et al.
CERN-RD-27-STATUS-REPORT-1995.
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1995. - 23 p.
Full text
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805.
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The RD27 muon trigger co-incidence array demonstrator ASIC
/ Bindra, R (Rutherford) ; Claxton, B (Rutherford) ; Dowdell, J (Rutherford) ; Letchford, A (Rutherford) ; Perera, V (Rutherford) ; Quinton, S (Rutherford) ; Filippini, N (INFN, Rome) ; Gennari, E (INFN, Rome) ; Petrolo, E (INFN, Rome) ; Veneziano, S (INFN, Rome) et al.
/RD27
One aim of the RD27 project is to perform design and R&D; work leading to a first level muon trigger for an experiment at the Large Hadron Collider (LHC) at CERN. This paper describes the design, implementation and testing of an ASIC for a trigger demonstrator system [...]
RD-27 Note 48.-
1996 - 5 p.
- Published in : IEEE Trans. Nucl. Sci. 43 (1996) 1661-1665
Fulltext: PDF;
In : 42nd Nuclear Science Symposium and Medical Imaging Conference, San Francisco, CA, USA, 21 - 28 Oct 1995, pp.1661-1665
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814.
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Likelihood Analysis of the Sub-GUT MSSM in Light of LHC 13-TeV Data
/ Costa, J.C. (Imperial Coll., London) ; Bagnaschi, E. (DESY) ; Sakurai, K. (Warsaw U.) ; Borsato, M. (U. Santiago de Compostela (main)) ; Buchmueller, O. (Imperial Coll., London) ; Citron, M. (Imperial Coll., London) ; De Roeck, A. (CERN ; Antwerp U.) ; Dolan, M.J. (Melbourne U.) ; Ellis, J.R. (King's Coll. London ; NICPB, Tallinn ; CERN) ; Flächer, H. (Bristol U.) et al.
We describe a likelihood analysis using MasterCode of variants of the MSSM in which the soft supersymmetry-breaking parameters are assumed to have universal values at some scale $M_{in}$ below the supersymmetric grand unification scale $M_{GUT}$, as can occur in mirage mediation and other models. In addition to $M_{in}$, such `sub-GUT' models have the 4 parameters of the CMSSM, namely a common gaugino mass $m_{1/2}$, a common soft supersymmetry-breaking scalar mass $m_0$, a common trilinear mixing parameter $A$ and the ratio of MSSM Higgs vevs $\tan\beta$, assuming that the Higgs mixing parameter $\mu > 0$. [...]
arXiv:1711.00458; KCL-PH-TH-2017-45; CERN-PH-TH-2017-197; CERN-TH-2017-197; DESY-17-156; FTPI-MINN-17-19; UMN-TH-3703-17; IFT-UAM-CSIC-17-089.-
2018-02-23 - 30 p.
- Published in : Eur. Phys. J. C 78 (2018) 158
Article from SCOAP3: PDF; Fulltext: PDF;
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816.
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The ATLAS Muon-to-Central Trigger Processor Interface Upgrade for the Run 3 of the LHC
/ ATLAS Collaboration
To cope with the higher luminosity and physics cross-sections for the third run of the Large Hadron Collider (LHC) and beyond, the Trigger and Data Acquisition (TDAQ) system of ATLAS experiment at CERN is being upgraded. Part of the TDAQ system, the Muon to Central Trigger Processor Interface (MUCTPI) receives muon candidates information from each of the 208 barrel and endcap muon trigger sectors, counts muon candidates for each transverse momentum threshold and sends the result to the Central Trigger Processor (CTP). [...]
ATL-DAQ-SLIDE-2017-943.-
Geneva : CERN, 2017 - 1 p.
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
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823.
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BL4S - Be a scientist -
Director: Noemi Caraban
Script: James Gillies
Content: Voice: John Ellis
00:01:24.920 / 30 November 2017 / Music: (License: UP by Asthmatic Astronaut CC BY-NC-SA 3.0 US), © 2017 CERN (License: music: CC BY-NC-SA 3.0 US)
Keywords: John Ellis, recordings, Physics, BL4S, summercamp, council, cms event, 3d animations, bl4sfootage, nitrogen, timelapse, spoon with nitrogen, first beam
Reference: CERN-MOVIE-2017-045-001
Language: English
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840.
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Magnetic Imprisonment of Dusty Pinballs by a Supernova Remnant
/ Fry, Brian J. (U.S. Air Force Academy ; Illinois U., Urbana, Astron. Dept.) ; Fields, Brian D. (Illinois U., Urbana, Astron. Dept. ; Illinois U., Urbana) ; Ellis, John R. (King's Coll. London ; NICPB, Tallinn ; CERN)
Motivated by recent measurements of deposits of $^{60}$Fe on the ocean floor and the lunar surface, we model the transport of dust grains containing $^{60}$Fe from a near-Earth (i.e., within 100 pc) supernova (SN). We inject dust grains into the environment of an SN remnant (SNR) and trace their trajectories by applying a 1D hydrodynamic description assuming spherical symmetry to describe the plasma dynamics, and include a rudimentary, 3D magnetic field description to examine its influence on charged dust grains. [...]
arXiv:1801.06859; KCL-PH-TH/2018-01; CERN-TH/2018-003; KCL-PH-TH-2018-01; CERN-TH-2018-003.-
2020-05-12 - 29 p.
- Published in : Astrophys. J. 894 (2020) 109
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846.
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Constraining Gluonic Quartic Gauge Coupling Operators with $gg \to \gamma \gamma$
/ Ellis, John (CERN ; King's Coll. London ; NICPB, Tallinn) ; Ge, Shao-Feng (Tokyo U., IPMU ; UC, Berkeley)
Gluon-gluon to photon-photon scattering $gg \to \gamma\gamma$ offers to the LHC experiments a uniquely powerful probe of dimension-8 operators in the Standard Model Effective Field Theory (SMEFT) that are quadratic in both the electromagnetic and gluonic field-strength tensors, such as would appear in the Born-Infeld extension of the Standard Model (SM). We use 13-TeV ATLAS data on the production of isolated photon pairs to set lower limits on the scales of dimension-8 operators $M \gtrsim 1$~TeV, and discuss the prospective sensitivities of possible future hadron colliders..
arXiv:1802.02416; KCL-PH-TH-2018-02; CERN-TH-2018-014; IPMU-18-0022.-
2018-07-24 - 6 p.
- Published in : Phys. Rev. Lett. 121 (2018) 041801
Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF;
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848.
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Updated Global SMEFT Fit to Higgs, Diboson and Electroweak Data
/ Ellis, John (King's Coll. London ; NICPB, Tallinn ; CERN) ; Murphy, Christopher W. (Brookhaven) ; Sanz, Verónica (Sussex U.) ; You, Tevong (Cambridge U., DAMTP ; Cambridge U.)
The ATLAS and CMS collaborations have recently released significant new data on Higgs and diboson production in LHC Run 2. Measurements of Higgs properties have improved in many channels, while kinematic information for $h \to \gamma\gamma$ and $h \to ZZ$ can now be more accurately incorporated in fits using the STXS method, and $W^+ W^-$ diboson production at high $p_T$ gives new sensitivity to deviations from the Standard Model. [...]
arXiv:1803.03252; Cavendish-HEP-2018-06; DAMTP-2018-12; KCL-PH-TH/2018-12; CERN-PH-TH/2018-042; CERN-TH-2018-042.-
2018-06-26 - 40 p.
- Published in : JHEP 06 (2018) 146
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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849.
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Search for top squarks decaying to tau sleptons in $pp$ collisions at $\sqrt{s}= 13$ TeV with the ATLAS detector
/ Aaboud, Morad (Oujda U.) ; Aad, Georges (Marseille, CPPM) ; Abbott, Brad (Oklahoma U.) ; Abdinov, Ovsat (Baku, Inst. Phys.) ; Abeloos, Baptiste (Orsay, LAL) ; Abidi, Syed Haider (Toronto U.) ; Abouzeid, Ossama (UC, Santa Cruz) ; Abraham, Nicola (Sussex U.) ; Abramowicz, Halina (Tel Aviv U.) ; Abreu, Henso (Technion) et al.
A search for direct pair production of top squarks in final states with two
tau leptons, $b$-jets, and missing transverse momentum is presented. [...]
arXiv:1803.10178.
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866.
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Uncertainties in WIMP Dark Matter Scattering Revisited
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Nagata, Natsumi (Tokyo U.) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
We revisit the uncertainties in the calculation of spin-independent scattering matrix elements for the scattering of WIMP dark matter particles on nuclear matter. In addition to discussing the uncertainties due to limitations in our knowledge of the nucleonic matrix elements of the light quark scalar densities < N |{\bar u} u, {\bar d} d, {\bar s} s| N>, we also discuss the importances of heavy quark scalar densities < N |{\bar c} c, {\bar b} b, {\bar t} t| N >, and comment on uncertainties in quark mass ratios. [...]
arXiv:1805.09795; KCL-PH-TH/2018-19; CERN-TH/2018-123; UMN-TH-3719/18; FTPI-MINN-18/10; UT-18-12.-
2018-07-11 - 14 p.
- Published in : Eur. Phys. J. C 78 (2018) 569
Article from SCOAP3: PDF; Fulltext: 1805.09795 - PDF; arXiv:1805.09795 - PDF;
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879.
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Searches for exclusive Higgs and $Z$ boson decays into $J/\psi\gamma$, $\psi(2S)\gamma$, and $\Upsilon(nS)\gamma$ at $\sqrt{s}=13$ TeV with the ATLAS detector
/ ATLAS Collaboration
Searches for the exclusive decays of the Higgs and $Z$ bosons into a $J/\psi$, $\psi(2S)$, or $\Upsilon(nS)$ ($n=1,2,3$) meson and a photon are performed with a $pp$ collision data sample corresponding to an integrated luminosity of 36.1 fb$^{-1}$ collected at $\sqrt{s}=13$ TeV with the ATLAS detector at the CERN Large Hadron Collider. No significant excess of events is observed above the expected backgrounds, and 95% confidence-level upper limits on the branching fractions of the Higgs boson decays to $J/\psi\gamma$, $\psi(2S)\gamma$, and $\Upsilon(nS)\gamma$ of $3.5\times10^{-4}$, $2.0\times10^{-3}$, and $(4.9,5.9,5.7)\times10^{-4}$, respectively, are obtained assuming Standard Model production. [...]
arXiv:1807.00802; CERN-EP-2018-154.-
Geneva : CERN, 2018-11-10 - 36 p.
- Published in : Phys. Lett. B 786 (2018) 134-155
Article from SCOAP3: PDF; Fulltext: PDF; External link: Previous draft version
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881.
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HiggsHunting2018 - HiggsHunting2018
23 - 25 Jul 2018
- Paris, France, France
/ Anastasiou, C (ed.) (ETH-Zurich, Switzerland); Augé, E (ed.) (LAL-Orsay, France); Bassler, U (ed.) (IN2P3, France); Bellettini, G (ed.) (Pisa/Fermilab, Italy/USA); Butler, J (ed.) (Fermilab, USA); Camporesi, T (ed.) (CERN, Switzerland); Charlton, D (ed.) (Birmingham, UK); Denisov, D (ed.) (Fermilab, USA); Ellis, R K (ed.) (IPPP-Durham, UK); Etienvre, A-I (ed.) (IRFU, France) et al.
2018
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883.
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Robust Constraint on Lorentz Violation Using Fermi-LAT Gamma-Ray Burst Data
/ Ellis, John (King's Coll. London ; CERN) ; Konoplich, Rostislav (New York U. (main) ; Manhattan Coll., Riverdale) ; Mavromatos, Nikolaos E. (King's Coll. London ; U. Valencia (main)) ; Nguyen, Linh (Manhattan Coll., Riverdale) ; Sakharov, Alexander S. (New York U. (main) ; Manhattan Coll., Riverdale ; CERN) ; Sarkisyan-Grinbaum, Edward K. (CERN ; Texas U., Arlington (main))
Models of quantum gravity suggest that the vacuum should be regarded as a medium with quantum structure that may have non-trivial effects on photon propagation, including the violation of Lorentz invariance. Fermi Large Area Telescope (LAT) observations of gamma-ray bursts (GRBs) are sensitive probes of Lorentz invariance, via studies of energy-dependent timing shifts in their rapidly-varying photon emissions. [...]
arXiv:1807.00189; KCL-PH-TH/2018-28; CERN-TH/2018-138; IFIC/17-62; CERN-TH-2018-138.-
2019-04-16 - 22 p.
- Published in : Phys. Rev. D 99 (2019) 083009
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893.
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Combination of searches for heavy resonances decaying into bosonic and leptonic final states using 36 fb$^{-1}$ of proton-proton collision data at $\sqrt{s} = 13$ TeV with the ATLAS detector
/ ATLAS Collaboration
Searches for new heavy resonances decaying into different pairings of $W$, $Z$, or Higgs bosons, as well as directly into leptons, are presented using a data sample corresponding to 36.1fb$^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 13 TeV collected during 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. Analyses selecting bosonic decay modes in the $qqqq$, $\nu\nu qq$, $\ell\nu qq$, $\ell\ell qq$, $\ell\nu\ell\nu$, $\ell\ell\nu\nu$, $\ell\nu\ell\ell$, $\ell\ell\ell\ell$, $qqbb$, $\nu\nu bb$, $\ell\nu bb$, and $\ell\ell bb$ final states are combined, searching for a narrow-width resonance. [...]
arXiv:1808.02380; CERN-EP-2018-179.-
Geneva : CERN, 2018-09-27 - 32 p.
- Published in : Phys. Rev. D 98 (2018) 052008
Article from SCOAP3: PDF; Fulltext: PDF; External link: Figures, tables and other information
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902.
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Review of Particle Physics, 2018-2019
/ Tanabashi, M (Nagoya U. ; KMI, Nagoya) ; Hagiwara, K (KEK, Tsukuba) ; Hikasa, K (Tohoku U.) ; Nakamura, K (Tokyo U., IPMU ; KEK, Tsukuba) ; Sumino, Y (Tohoku U.) ; Takahashi, F (Tohoku U.) ; Tanaka, J (Tokyo U., ICEPP) ; Agashe, K (Maryland U.) ; Aielli, G (Rome U., Tor Vergata) ; Amsler, C (Stefan Meyer Inst. Subatomare Phys.) et al.
/Particle Data Group
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,873 new measurements from 758 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. [...]
2018 - 1898 p.
- Published in : Phys. Rev. D 98 (2018) 030001
- Please contact the library if you need to access this document.
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912.
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Constraining D-foam via the 21-cm Line
/ Ellis, John (King's Coll. London ; NICPB, Tallinn ; CERN) ; Mavromatos, Nick E. (King's Coll. London) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy)
We have suggested earlier that D-particles, which are stringy space-time defects predicted in brane-inspired models of the Universe, might constitute a component of dark matter, and that they might contribute to the masses of singlet fermions that could provide another component. Interactions of the quantum-fluctuating D-particles with matter induce vector forces that are mediated by a massless effective U(1) gauge field, the "D-photon", which is distinct from the ordinary photon and has different properties from dark photons. [...]
arXiv:1810.05393; CERN-TH-2018-217; KCL-PH-TH-2018-45; ACT-03-18; CERN-TH-2018-217,KCL-PH-TH/2018-45,ACT-03-18; MI-TH-18-183.-
2019-01-23 - 13 p.
- Published in : Phys. Rev. D 99 (2019) 015031
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913.
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Supersymmetric Models in Light of Improved Higgs Mass Calculations
/ Bagnaschi, E. (PSI, Villigen) ; Bahl, H. (Munich, Max Planck Inst.) ; Ellis, J. (King's Coll. London ; NICPB, Tallinn ; CERN) ; Evans, J. (Korea Inst. Advanced Study, Seoul) ; Hahn, T. (Munich, Max Planck Inst.) ; Heinemeyer, S. (Madrid, IFT ; Cantabria Inst. of Phys.) ; Hollik, W. (Munich, Max Planck Inst.) ; Olive, K.A. (Minnesota U., Theor. Phys. Inst.) ; Paßehr, S. (Paris, LPTHE) ; Rzehak, H. (Southern Denmark U., CP3-Origins) et al.
We discuss the parameter spaces of supersymmetry (SUSY) scenarios taking into account the improved Higgs-mass prediction provided by FeynHiggs 2.14.1. Among other improvements, this prediction incorporates three-loop renormalization-group effects and two-loop threshold corrections, and can accommodate three separate mass scales: m_{\tilde q} (for squarks), m_{\tilde g} (for gluinos) and m_{\tilde\chi} (for electroweakinos). [...]
arXiv:1810.10905; CERN-TH/2018-185; CERN-TH-2018-185; DESY-18-182; PSI-PR-18-11; UMN-TH-3801/18; FTPI-MINN-18/18; UMN-TH-3801/18,
FTPI-MINN-18/18; IFT-UAM/CSIC-18-081; KIAS-P18095; KCL-PH-TH/2018-41; MPP-2018-239; KCL-PH-TH/2018-41,
MPP-2018-239; CP3-Origins-2018-039 DNRF90.-
2019-02-19 - 35 p.
- Published in : Eur. Phys. J. C 79 (2019) 149
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Fulltext from Publisher: PDF;
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914.
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The Future of High-Energy Collider Physics
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn)
High-energy collider physics in the next decade will be dominated by the LHC, whose high-luminosity incarnation will take Higgs measurements and new particle searches to the next level. [...]
arXiv:1810.11263 ; KCL-PH-TH-2018-61 ; CERN-TH-2018-228.
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2018. - 15 p.
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924.
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A General Classification of Starobinsky-like Inflationary Avatars of SU(2,1)/SU(2) x U(1) No-Scale Supergravity
/ Ellis, John (King's Coll. London ; CERN) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.)
Measurements of the cosmic microwave background (CMB) favour models of inflation with a small tensor-to-scalar ratio $r$, as predicted by the Starobinsky $R + R^2$ model. It has been shown previously that various models based on no-scale supergravity with different forms of superpotential make predictions similar to those of the Starobinsky model. [...]
arXiv:1812.02192; KCL-PH-TH-2018-69; KCL-PH-TH/2018-69; CERN-TH-2018-260; ACT-04-18; MI-TH-1813; UMN-TH-3806-18; FTPI-MINN-18-21; MI-TH-1813,
UMN-TH-3806/18; FTPI-MINN-18/21.-
2019-03-18 - 21 p.
- Published in : JHEP 03 (2019) 099
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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930.
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Symmetry Breaking and Reheating after Inflation in No-Scale Flipped SU(5)
/ Ellis, John (King's Coll. London ; CERN) ; Garcia, Marcos A.G. (Rice U.) ; Nagata, Natsumi (Tokyo U.) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
No-scale supergravity and the flipped SU(5)$\times$U(1) gauge group provide an ambitious prototype string-inspired scenario for physics below the string scale, which can accommodate the Starobinsky-like inflation favoured by observation when the inflaton is associated with one of the singlet fields associated with neutrino mass generation. During inflation, the vacuum remains in the unbroken GUT phase, and GUT symmetry breaking occurs later when a field with a flat direction (the flaton) acquires a vacuum expectation value. [...]
arXiv:1812.08184; KCL-PH-TH-2018-77; KCL-PH-TH/2018-77; CERN-TH-2018-273; UT-18-29; ACT-05-18; MI-TH-1815; UMN-TH-3808-18; FTPI-MINN-18-23; ACT-05-18,
MI-TH-1815; UMN-TH-3808/18; FTPI-MINN-18/23.-
2019-04-05 - 49 p.
- Published in : JCAP 1904 (2019) 009
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932.
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Opportunities in Flavour Physics at the HL-LHC and HE-LHC
/ Cerri, A. (Sussex U.) ; Gligorov, V.V. (Paris U., VI-VII) ; Malvezzi, S. (INFN, Milan Bicocca) ; Martin Camalich, J. (Laguna U., Tenerife ; IAC, La Laguna) ; Zupan, J. (Cincinnati U.) ; Akar, S. (Cincinnati U.) ; Alimena, J. (Ohio State U.) ; Allanach, B.C. (Cambridge U., DAMTP) ; Altmannshofer, W. (UC, Santa Cruz, Inst. Part. Phys.) ; Anderlini, L. (INFN, Florence) et al.
Motivated by the success of the flavour physics programme carried out over the last decade at the Large Hadron Collider (LHC), we characterize in detail the physics potential of its High-Luminosity and High-Energy upgrades in this domain of physics. [...]
arXiv:1812.07638 ; FERMILAB-PUB-18-703-CMS-T.
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292 p.
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933.
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Interference Effects in $t{\bar t}$ Production at the LHC as a Window on New Physics
/ Djouadi, Abdelhak (Annecy, LAPTH ; NICPB, Tallinn) ; Ellis, John (NICPB, Tallinn ; King's Coll. London ; CERN) ; Popov, Andrey (Lyon, IPN ; SINP, Moscow) ; Quevillon, Jérémie (LPSC, Grenoble)
Many extensions of the Standard Model contain (pseudo)scalar bosons with masses in the TeV range. At hadron colliders, such particles would predominantly be produced in gluon fusion and would decay into top quark pair final sates, a signal that interferes with the large QCD background $gg \to t\bar t$. [...]
arXiv:1901.03417; CERN-TH-2019-001; KCL-PH-TH/2018-05; LAPTH/001/19.-
2019-03-21 - 44 p.
- Published in : JHEP 03 (2019) 119
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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935.
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Identification of particles with Lorentz factor up to $10^{4}$ with Transition Radiation Detectors based on micro-strip silicon detectors
/ Alozy, J. (CERN) ; Belyaev, N. (Moscow Phys. Eng. Inst.) ; Campbell, M. (CERN) ; Cherry, M. (Louisiana State U.) ; Dachs, F. (CERN ; Vienna, Tech. U.) ; Doronin, S. (Moscow Phys. Eng. Inst.) ; Filippov, K. (Moscow Phys. Eng. Inst.) ; Fusco, P. (Bari Polytechnic ; Bari U. ; INFN, Bari) ; Gargano, F. (INFN, Bari) ; Heijne, E. (CERN) et al.
This work is dedicated to the study of a technique for hadron identification in the TeV momentum range, based on the simultaneous measurement of the energies and of the emission angles of the Transition Radiation (TR) X-rays with respect to the radiating particles. A detector setup has been built and tested with particles in a wide range of Lorentz factors (from about $10^3$ to about $4 \times 10^4$ crossing different types of radiators. [...]
arXiv:1901.11265.-
2019-02-16 - 13 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 927 (2019) 1-13
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960.
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Combination of searches for invisible Higgs boson decays with the ATLAS experiment
/ ATLAS Collaboration
Dark matter particles, if sufficiently light, may be produced in decays of the Higgs boson. This Letter presents a statistical combination of searches for $H\to\textrm{invisible}$ decays where $H$ is produced according to the Standard Model via vector boson fusion, $Z(\ell\ell)H$, and $W\!/\!Z(\textrm{had})H$, all performed with the ATLAS detector using 36.1 fb$^{-1}$ of $pp$ collisions at a center-of-mass energy of $\sqrt s = 13$ TeV at the LHC. [...]
arXiv:1904.05105; CERN-EP-2019-046.-
Geneva : CERN, 2019-06-13 - 28 p.
- Published in : Phys. Rev. Lett. 122 (2019) 231801
Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: 10.1103_PhysRevLett.122.231801 - PDF; b1479667c142ec3f8d6a72ab69264ce2 - PDF; External link: Previous draft version
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962.
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Global Analysis of Dark Matter Simplified Models with Leptophobic Spin-One Mediators using MasterCode
/ Bagnaschi, E. (PSI, Villigen ; DESY) ; Costa, J.C. (Imperial Coll., London) ; Sakurai, K. (Warsaw U.) ; Borsato, M. (Heidelberg U.) ; Buchmueller, O. (Imperial Coll., London) ; Roeck, A. (CERN ; Antwerp U.) ; Dolan, M.J. (Melbourne U.) ; Ellis, J.R. (King's Coll. London ; NICPB, Tallinn ; CERN) ; Flächer, H. (Bristol U.) ; Hahn, K. (Northwestern U.) et al.
We report the results of a global analysis of dark matter simplified models (DMSMs) with leptophobic mediator particles of spin one, considering the cases of both vector and axial-vector interactions with dark matter (DM) particles and quarks. We require the DMSMs to provide all the cosmological DM density indicated by Planck and other observations, and we impose the upper limits on spin-independent and -dependent scattering from direct DM search experiments. [...]
arXiv:1905.00892; KCL-PH-TH/2019-10; CERN-TH-2019-007; DESY-19-071; PSI-PR-19-06; FTPI-MINN-19/05; UMN-TH-3814/19; IFT-UAM/CSIC-18-120.-
2019-11-06 - 19 p.
- Published in : Eur. Phys. J. C 79 (2019) 895
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978.
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Unified No-Scale Attractors
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Nanopoulos, Dimitri V. (TAMU, College Station ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U.) ; Verner, Sarunas (Minnesota U.)
We have presented previously a general treatment of Starobinsky-like inflation in no-scale supergravity where the tensor-to-scalar ratio $r = 3(1 - n_s)^2$, and $n_s$ is the tilt of the scalar perturbations. In particular, we have shown how this scenario can be unified with modulus fixing, supersymmetry breaking and a small cosmological constant. [...]
arXiv:1906.10176; KCL-PH-TH/2019-51; CERN-TH-2019-089; ACT-03-19; MI-TH-1923; UMN-TH-3826/19; MI-TH-1923,
UMN-TH-3826/19; FTPI-MINN-19/17.-
2019-09-20 - 32 p.
- Published in : JCAP 1909 (2019) 040
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987.
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Intergalactic Magnetic Fields from First-Order Phase Transitions
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Fairbairn, Malcolm (King's Coll. London) ; Lewicki, Marek (King's Coll. London ; Warsaw U. (main)) ; Vaskonen, Ville (King's Coll. London ; NICPB, Tallinn) ; Wickens, Alastair (King's Coll. London)
We study the generation of intergalactic magnetic fields in two models for first-order phase transitions in the early Universe that have been studied previously in connection with the generation of gravitational waves (GWs): the Standard Model supplemented by an $|H|^6$ operator (SM+$H^6$) and a classically scale-invariant model with an extra gauged U(1) $B - L$ symmetry (SM$_{B-L}$). We consider contributions to magnetic fields generated by bubble collisions and by turbulence in the primordial plasma, and we consider the hypotheses that helicity is seeded in the gauge field or kinetically. [...]
arXiv:1907.04315; KCL-PH-TH/2019-60; CERN-TH-2019-104.-
2019-09-11 - 19 p.
- Published in : JCAP 1909 (2019) 019
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1002.
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Performance of electron and photon triggers in ATLAS during LHC Run 2
/ ATLAS Collaboration
Electron and photon triggers covering transverse energies from 5 GeV to several TeV are essential for the ATLAS experiment to record signals for a wide variety of physics: from Standard Model processes to searches for new phenomena in both proton-proton and heavy-ion collisions. To cope with a fourfold increase of peak LHC luminosity from 2015 to 2018 (Run 2), to 2.1$\times$10$^{34}$cm$^{-2}$s$^{-1}$, and a similar increase in the number of interactions per beam-crossing to about 60, trigger algorithms and selections were optimised to control the rates while retaining a high efficiency for physics analyses. [...]
arXiv:1909.00761; CERN-EP-2019-169.-
Geneva : CERN, 2020-01-22 - 56 p.
- Published in : Eur. Phys. J. C 80 (2020) 47
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1007.
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Positivity and noncommutative analysis
: festschrift in honour of Ben de Pagter on the occasion of his 65th birthday
/ Buskes, Gerard (ed.) ; Jeu, Marcel (ed.) ; Dodds, Peter (ed.) ; Schep, Anton (ed.) ; Sukochev, Fedor (ed.) ; Neerven, Jan (ed.) ; Wickstead, Anthony (ed.)
Capturing the state of the art of the interplay between positivity, noncommutative analysis, and related areas including partial differential equations, harmonic analysis, and operator theory, this volume was initiated on the occasion of the Delft conference in honour of Ben de Pagter's 65th birthda [...]
Cham : Springer, 2019.
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1010.
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Searching for supersymmetry and its avatars
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn)
Why continue looking for supersymmetry? Over andabove the aesthetic and theoretical motivations fromstring theory, there are several longstanding pheno-menologicalmotivationsforTeV-scalesuper-symmetry, such as the electroweak scale, and thelightest supersymmetric particle as cold dark matter.Run 1 of the Large Hadron Collider (LHC) hasactually provided three extra motivations, namelythe stabilization of the electroweak vacuum, andsuccessful predictions for the Higgs mass andcouplings.How to look for it?There are severalexamples of emergent supersymmetry, the mostrecent being on the surfaces of topological insulators,and some sort of effective supersymmetry could beuseful for boosting the power of laser arrays. At theLHC, attention is moving towards signatures that hadpreviously been neglected, such as long-lived chargedparticles—which might be an opportunity for theMoEDAL experiment.This article is part of a discussion meeting issue‘Topological avatars of new physics’..
arXiv:1910.07489; KCL-PH-TH/2019-78; CERN-TH-2019-169.-
2019-12-30 - 9 p.
- Published in : Philos. Trans. R. Soc. Lond. A 377 (2019) 20190069
Fulltext: PDF;
In : Topological avatars of new physics, London, UK, 4 - 5 Mar 2019, pp.20190069
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1016.
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Near-Earth Supernova Explosions: Evidence, Implications, and Opportunities
/ Fields, Brian D. (Illinois U., Urbana) ; Ellis, John R. (King's Coll. London) ; Binns, Walter R. (Washington U., St. Louis) ; Breitschwerdt, Dieter (Helmholtz-Zentrum, Berlin) ; deNolfo, Georgia A. (NASA, Goddard) ; Diehl, Roland (Garching, Max Planck Inst., MPE) ; Dwarkadas, Vikram V. (Chicago U.) ; Ertel, Adrienne (Illinois U., Urbana) ; Faestermann, Thomas (Tech. U., Munich (main)) ; Feige, Jenny (Helmholtz-Zentrum, Berlin) et al.
There is now solid experimental evidence of at least one supernova explosion within 100 pc of Earth within the last few million years, from measurements of the short-lived isotope 60Fe in widespread deep-ocean samples, as well as in the lunar regolith and cosmic rays. [...]
arXiv:1903.04589.
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11 p.
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1022.
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ATLAS data quality operations and performance for 2015-2018 data-taking
/ ATLAS Collaboration
The ATLAS detector at the Large Hadron Collider reads out particle collision data from over 100 million electronic channels at a rate of approximately $100$ kHz, with a recording rate for physics events of approximately 1 kHz. Before being certified for physics analysis at computer centres worldwide, the data must be scrutinised to ensure they are clean from any hardware or software related issues that may compromise their integrity. [...]
arXiv:1911.04632; CERN-EP-2019-207.-
Geneva : CERN, 2020-04-02 - 43 p.
- Published in : JINST 15 (2020) P04003
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1026.
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Supersymmetric Proton Decay Revisited
/ Ellis, John (King's Coll. London (main) ; CERN ; NICPB, Tallinn) ; Evans, Jason L. (Korea Inst. Advanced Study, Seoul ; Tsung-Dao Lee Inst., Shanghai) ; Nagata, Natsumi (Tokyo U.) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Velasco-Sevilla, Liliana (Bergen U.)
Encouraged by the advent of a new generation of underground detectors---JUNO, DUNE and Hyper-Kamiokande---that are projected to improve significantly on the present sensitivities to various baryon decay modes, we revisit baryon decay in the minimal supersymmetric SU(5) GUT. We discuss the phenomenological uncertainties associated with hadronic matrix elements and the value of the strong coupling $\alpha_s$---which are the most important---the weak mixing angle $\theta_W$, quark masses including one-loop renormalization effects, quark mixing and novel GUT phases that are not visible in electroweak interaction processes. [...]
arXiv:1912.04888; KCL-PH-TH/2019-91; CERN-TH-2019-216; UT-19-30; UMN-TH-3907/19; FTPI-MINN-19/28; UMN-TH-3907/19,
FTPI-MINN-19/28.-
2020-04-21 - 30 p.
- Published in : Eur. Phys. J. C 80 (2020) 332
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Fulltext from Publisher: PDF;
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1027.
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AION: An Atom Interferometer Observatory and Network
/ Badurina, L. (King's Coll. London) ; Bentine, E. (U. Oxford (main)) ; Blas, D. (King's Coll. London) ; Bongs, K. (Birmingham U.) ; Bortoletto, D. (U. Oxford (main)) ; Bowcock, T. (U. Liverpool (main)) ; Bridges, K. (U. Liverpool (main)) ; Bowden, W. (Teddington, Natl. Phys. Lab ; Imperial Coll., London) ; Buchmueller, O. (Imperial Coll., London) ; Burrage, C. (U. Nottingham) et al.
We outline the experimental concept and key scientific capabilities of AION (Atom Interferometer Observatory and Network), a proposed UK-based experimental programme using cold strontium atoms to search for ultra-light dark matter, to explore gravitational waves in the mid-frequency range between the peak sensitivities of the LISA and LIGO/Virgo/ KAGRA/INDIGO/Einstein Telescope/Cosmic Explorer experiments, and to probe other frontiers in fundamental physics. AION would complement other planned searches for dark matter, as well as probe mergers involving intermediate mass black holes and explore early universe cosmology. [...]
arXiv:1911.11755; AION-2019-001; CERN-TH-2019-199.-
2020-05-06 - 28 p.
- Published in : JCAP 2005 (2020) 011
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1034.
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Charting the European Course to the High-Energy Frontier
/ Aslanides, E. (Aix-Marseille U.) ; Barate, R. (Annecy, LAPP) ; Benvenuti, C. (CERN) ; Bloch, P. (CERN ; Imperial Coll., London) ; Camporesi, T. (CERN) ; David, A. (CERN) ; Di Lella, L. (INFN, Pisa ; Pisa U.) ; Dissertori, G. (ETH, Zurich (main)) ; Doble, N. (CERN) ; Dumarchez, J. (Paris U., VI-VII) et al.
We review the capabilities of two projects that have been proposed as the next major European facility, for consideration in the upcoming update of the European Strategy for Particle Physics: CLIC and FCC. [...]
arXiv:1912.13466 ; CERN-TH-2019-231.
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15 p.
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1036.
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Prospects for Fundamental Physics with LISA
/ LISA Collaboration
In this paper, which is of programmatic rather than quantitative nature, we aim to further delineate and sharpen the future potential of the LISA mission in the area of fundamental physics. Given the very broad range of topics that might be relevant to LISA, we present here a sample of what we view as particularly promising directions, based in part on the current research interests of the LISA scientific community in the area of fundamental physics. [...]
arXiv:2001.09793.-
2020-08-31 - 22 p.
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1042.
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Rucio beyond ATLAS: Experiences from Belle II, CMS, DUNE, EISCAT3D, LIGO/VIRGO, SKA, XENON
/ Lassnig, Mario (European Laboratory for Particle Physics, CERN) ; Barisits, Martin-Stefan (European Laboratory for Particle Physics, CERN) ; Laycock, Paul (Brookhaven National Laboratory (BNL)) ; Serfon, Cedric (Brookhaven National Laboratory (BNL)) ; Vaandering, Eric Wayne (Fermi National Accelerator Lab. (US)) ; Ellis, Katherine (Queen Mary University of London) ; Illingworth, Robert (Fermi National Accelerator Lab. (US)) ; Garonne, Vincent (University of Oslo) ; Fronze', Gabriele Gaetano (Universita e INFN Torino (IT))
For many scientific projects, data management is an increasingly complicated challenge. [...]
ATL-SOFT-PROC-2020-017.
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2020. - 8 p.
Original Communication (restricted to ATLAS) - Full text
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1043.
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Proton Decay: Flipped vs Unflipped SU(5)
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Garcia, Marcos A.G. (Madrid, IFT) ; Nagata, Natsumi (Tokyo U. ; HARC, Woodlands ; Athens Academy) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
We analyze nucleon decay modes in a no-scale supersymmetric flipped SU(5) GUT model, and contrast them with the predictions for proton decays via dimension-6 operators in a standard unflipped supersymmetric SU(5) GUT model. We find that these GUT models make very different predictions for the ratios $\Gamma(p \to \pi^0 \mu^+)/\Gamma(p \to \pi^0 e^+)$, $\Gamma(p \to \pi^+ \bar{\nu})/\Gamma(p \to \pi^0 e^+)$, $\Gamma(p \to K^0 e^+)/\Gamma(p \to \pi^0 e^+)$ and $\Gamma(p \to K^0 \mu^+)/\Gamma(p \to \pi^0 \mu^+)$, and that predictions for the ratios $\Gamma(p \to \pi^0 \mu^+)/\Gamma(p \to \pi^0 e^+)$ and $\Gamma(p \to \pi^+ \bar{\nu})/\Gamma(p \to \pi^0 e^+)$ also differ in variants of the flipped SU(5) model with normal- or inverse-ordered light neutrino masses. [...]
arXiv:2003.03285; KCL-PH-TH/2020-10; CERN-TH-2020-031; UT-20-03; ACT-01-20; MI-TH-206, UMN-TH-3914/20; MI-TH-206,
UMN-TH-3914/20; FTPI-MINN-20/04; IFT-UAM/CSIC-20-36.-
2020-05-06 - 25 p.
- Published in : JHEP 2005 (2020) 021
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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1045.
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Reinterpretation of LHC Results for New Physics: Status and Recommendations after Run 2
/ Abdallah, Waleed (Harish-Chandra Res. Inst. ; Cairo U.) ; AbdusSalam, Shehu (Shahid Beheshti U.) ; Ahmadov, Azar (Baku State U.) ; Ahriche, Amine (ICTP, Trieste ; Algiers, Ecole Normale Superieure) ; Alguero, Gaël (LPSC, Grenoble) ; Allanach, Benjamin C. (Unlisted ; Cambridge U., DAMTP) ; Araz, Jack Y. (Concordia U., Montreal) ; Arbey, Alexandre (IP2I, Lyon ; CERN) ; Arina, Chiara (Louvain U., CP3) ; Athron, Peter (Monash U.) et al.
/LHC Reinterpretation Forum
We report on the status of efforts to improve the reinterpretation of searches and measurements at the LHC in terms of models for new physics, in the context of the LHC Reinterpretation Forum. We detail current experimental offerings in direct searches for new particles, measurements, technical implementations and Open Data, and provide a set of recommendations for further improving the presentation of LHC results in order to better enable reinterpretation in the future. [...]
arXiv:2003.07868; CERN-LPCC-2020-001; FERMILAB-FN-1098-CMS-T; Imperial/HEP/2020/RIF/01.-
2020-08-21 - 58 p.
- Published in : SciPost Phys. 9 (2020) 022
Fulltext: 2003.07868 - PDF; fermilab-fn-1098-cms-t - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server (fulltext available)
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1048.
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Probes of Gravitational Waves with Atom Interferometers
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Vaskonen, Ville (King's Coll. London ; NICPB, Tallinn)
Atom interferometers (AIs) on earth and in space offer good capabilities for measuring gravitational waves (GWs) in the mid-frequency deciHz band, complementing the sensitivities of the LIGO/Virgo and LISA experiments and enabling probes of possible modifications of the general relativity predictions for GW propagation. We illustrate these capabilities using the projected sensitivities of the AION (terrestrial) and AEDGE (space-based) AI projects, showing that AION could improve the present LIGO/Virgo direct limit on the graviton mass by a factor $\sim 40$ to $\simeq 10^{-24}\,$eV, and AEDGE could improve the limit by another order of magnitude. [...]
arXiv:2003.13480; KCL-PH-TH/2020-15; CERN-TH-2020-048.-
2020-06-10 - 9 p.
- Published in : Phys. Rev. D 101 (2020) 124013
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1050.
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Phenomenology and Cosmology of No-Scale Attractor Models of Inflation
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.)
We have recently proposed attractor models for modulus fixing, inflation, supersymmetry breaking and dark energy based on no-scale supergravity. In this paper we develop phenomenological and cosmological aspects of these no-scale attractor models that underpin their physical applications. [...]
arXiv:2004.00643; KCL-PH-TH/2020-14; CERN-TH-2020-046; ACT-02-20; MI-TH-2010,
UMN-TH-3915/20; MI-TH-2010, UMN-TH-3915/20; FTPI-MINN-20/05.-
2020-08-19 - 41 p.
- Published in : JCAP 2008 (2020) 037
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1056.
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Performance of the ATLAS muon triggers in Run 2
/ ATLAS Collaboration
The performance of the ATLAS muon trigger system is evaluated with proton$-$proton ($pp$) and heavy-ion (HI) collision data collected in Run 2 during 2015-2018 at the Large Hadron Collider. It is primarily evaluated using events containing a pair of muons from the decay of $Z$ bosons to cover the intermediate momentum range between 25 GeV and 100 GeV. [...]
arXiv:2004.13447; CERN-EP-2020-031.-
Geneva : CERN, 2020-09-14 - 60 p.
Fulltext: PDF; External link: Previous draft version
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1061.
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Performance of the missing transverse momentum triggers for the ATLAS detector during Run-2 data taking
/ ATLAS Collaboration
The factor of four increase in the LHC luminosity, from $0.5\times 10^{34}\,\textrm{cm}^{-2}\textrm{s}^{-1}$ to $2.0\times 10^{34}\textrm{cm}^{-2}\textrm{s}^{-1}$, and the corresponding increase in pile-up collisions during the 2015-2018 data-taking period, presented a challenge for ATLAS to trigger on missing transverse momentum. The output data rate at fixed threshold typically increases exponentially with the number of pile-up collisions, so the legacy algorithms from previous LHC data-taking periods had to be tuned and new approaches developed to maintain the high trigger efficiency achieved in earlier operations. [...]
arXiv:2005.09554; CERN-EP-2020-050.-
Geneva : CERN, 2020-08-19 - 53 p.
Article from SCOAP3: PDF; Fulltext: PDF; External link: Previous draft version
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1066.
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Supercritical string cosmology drains the swampland
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Mavromatos, Nick E. (King's Coll. London) ; Nanopoulos, D.V. (Texas A-M ; HARC, Woodlands ; Athens Academy)
The First and Second Swampland Conjectures (FSC & SSC) are substantially modified in non-critical string cosmology, in which cosmic time is identified with the time-like Liouville mode of the supercritical string. In this scenario the Friedmann equation receives additional contributions due to the non-criticality of the string. [...]
arXiv:2006.06430; KCL-PH-TH/2020-29; CERN-TH-2020-094; ACT-03-20; MITH-20-13.-
2020-08-27 - 14 p.
- Published in : Phys. Rev. D 102 (2020) 046015
Article from SCOAP3: PDF; Fulltext: PDF;
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1072.
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Alignment of the ATLAS Inner Detector in Run-2
/ ATLAS Collaboration
The performance of the ATLAS Inner Detector alignment has been studied using $pp$ collision data at $\sqrt{s} = 13$ TeV collected by the ATLAS experiment during Run 2 (2015 to 2018) of the Large Hadron Collider (LHC). The goal of the detector alignment is to determine the detector geometry as accurately as possible and correct for time-dependent movements. [...]
arXiv:2007.07624; CERN-EP-2020-108.-
Geneva : CERN, 2020-12-24 - 41 p.
- Published in : Eur. Phys. J. C 80 (2020) 1194
Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF; External link: Previous draft version
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1078.
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Operation of the ATLAS trigger system in Run 2
/ ATLAS Collaboration
The ATLAS experiment at the Large Hadron Collider employs a two-level trigger system to record data at an average rate of 1 kHz from physics collisions, starting from an initial bunch crossing rate of 40 MHz. During the LHC Run 2 (2015$-$2018), the ATLAS trigger system operated successfully with excellent performance and flexibility by adapting to the various run conditions encountered and has been vital for the ATLAS Run-2 physics programme. [...]
arXiv:2007.12539; CERN-EP-2020-109.-
Geneva : CERN, 2020-10-02 - 60 p.
- Published in : JINST 15 (2020) P10004
Fulltext: PDF; Fulltext from publisher: PDF; External link: Previous draft version
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1089.
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Measurement of $\mathrm{B_c(2S)^{+}}$ and $\mathrm{B^{*}_c(2S)^{+}}$ cross section ratios in proton-proton collisions at $\sqrt{s} = $ 13 TeV
/ CMS Collaboration
The ratios of the $\mathrm{B_c(2S)^{+}}$ to $\mathrm{B_c^{+}}$, $\mathrm{B^{*}_c(2S)^{+}}$ to $\mathrm{B_c^{+}}$, and $\mathrm{B^{*}_c(2S)^{+}}$ to $\mathrm{B_c(2S)^{+}}$ production cross sections are measured in proton-proton collisions at $\sqrt{s} = $ 13 TeV, using a data sample collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 143 fb$^{-1}$. The three measurements are made in the $\mathrm{B_c^{+}}$ meson phase space region defined by the transverse momentum ${p_{\mathrm{T}}} > $ 15 GeV and absolute rapidity $|y| < $ 2.4, with the excited $\mathrm{B_c(2S)^{+}}$ states reconstructed through the ${ \mathrm{B_c^{+}} \pi^{+}\pi^{-}} $, followed by the ${ \mathrm{B_c^{+}} \! \to \! \mathrm{J/\psi} \, \pi^{+}}$ and ${ \mathrm{J/\psi} \! \to \! \mu^{+}\mu^{-}}$ decays. [...]
arXiv:2008.08629; CMS-BPH-19-001; CERN-EP-2020-146; CMS-BPH-19-001-003.-
Geneva : CERN, 2020-11-17 - 21 p.
- Published in : Phys. Rev. D 102 (2020) 092007
Article from SCOAP3: PDF; Fulltext: PDF; External links: Additional information for the analysis; CMS AuthorList
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1092.
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Supernova Triggers for End-Devonian Extinctions
/ Fields, Brian D. (Illinois U., Urbana (main) ; Illinois U., Urbana, Astron. Dept. ; Illinois U., Urbana) ; Melott, Adrian L. (Kansas U.) ; Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Ertel, Adrienne F. ; Fry, Brian J. (U.S. Air Force Academy) ; Lieberman, Bruce S. (U. Kansas, Lawrence) ; Liu, Zhenghai (Illinois U., Urbana (main) ; Illinois U., Urbana, Astron. Dept.) ; Miller, Jesse A. (Illinois U., Urbana (main) ; Illinois U., Urbana, Astron. Dept.) ; Thomas, Brian C. (Washburn U.)
The Late Devonian was a protracted period of low speciation resulting in biodiversity decline, culminating in extinction events near the Devonian-Carboniferous boundary. Recent evidence indicates that the final extinction event may have coincided with a dramatic drop in stratospheric ozone, possibly due to a global temperature rise. [...]
arXiv:2007.01887; CERN-TH-2020-102; CERN-TH-2020-102.-
2020-09-01 - 3 p.
- Published in : Proc. Natl. Acad. Sci. U. S. A. 117 (2020) 21008–21010
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1100.
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Non-Oscillatory No-Scale Inflation
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U.) ; Verner, Sarunas (Minnesota U.)
We propose a non-oscillatory no-scale supergravity model of inflation (NO-NO inflation) in which the inflaton does not oscillate at the end of the inflationary era. Instead, the Universe is then dominated by the inflaton kinetic energy density (kination). [...]
arXiv:2008.09099; UMN-TH-3924/20; FTPI-MINN-20/27; KCL-PH-TH/2020-38,
CERN-TH-2020-123; ACT-05-20; MI-TH-2020.-
2021-03-16 - 31 p.
- Published in : JCAP 2103 (2021) 052
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1116.
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The very forward CASTOR calorimeter of the CMS experiment
/ CMS Collaboration
The physics motivation, detector design, triggers, calibration, alignment, simulation, and overall performance of the very forward CASTOR calorimeter of the CMS experiment are reviewed. The CASTOR Cherenkov sampling calorimeter is located very close to the LHC beam line, at a radial distance of about 1 cm from the beam pipe, and at 14.4 m from the CMS interaction point, covering the pseudorapidity range of $-6.6 < \eta < -5.2$. [...]
arXiv:2011.01185; CMS-PRF-18-002; CERN-EP-2020-180; CMS-PRF-18-002; CERN-EP-2020-180; CMS-PRF-18-002-003.-
Geneva : CERN, 2021-02-08 - 65 p.
- Published in : JINST 16 (2021) P02010
Fulltext: 2011.01185 - PDF; fermilab-pub-20-696-cms-scd - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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1121.
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CentOS Linux for the ATLAS MUCTPI Upgrade
/ Spiwoks, R. (CERN) ; Armbruster, A. (CERN) ; Czodrowski, P. (CERN) ; Ellis, N. (CERN) ; Farthouat, P. (CERN) ; Haas, S. (CERN) ; Kulinska, A. (CERN ; AGH-UST, Cracow) ; Marzin, A. (CERN) ; Papageorgiou, P. (CERN ; Natl. Tech. U., Athens) ; Pauly, T. (CERN) et al.
A new Muon-to-Central-Trigger Processor Interface (MUCTPI) was built as part of the upgrade of the ATLAS Level-1 trigger system for the next Run of the Large Hadron Collider at CERN. The MUCTPI has 208 high-speed optical serial links for receiving muon candidates from the muon trigger detectors. [...]
arXiv:2010.08105; O_MISC01_9.-
2021-05-27 - 5 p.
- Published in : IEEE Trans. Nucl. Sci. 68 (2021) 2127-2131
Fulltext: PDF;
In : 22nd IEEE Real Time Conference, Virtual, Vietnam, 12 - 23 Oct 2020, pp.2127-2131
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1125.
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Exclusive dimuon production in ultraperipheral Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}} = 5.02$ TeV with ATLAS
/ ATLAS Collaboration
Exclusive dimuon production in ultraperipheral collisions (UPC), resulting from photon-photon interactions in the strong electromagnetic fields of colliding high-energy lead nuclei, $\mathrm{PbPb} (\gamma\gamma) \rightarrow \mu\mu (\mathrm{Pb}^{(\star)}\mathrm{Pb}^{(\star)} )$, is studied using $\mathcal{L}_{\mathrm{int}} = 0.48$ nb$^{-1}$ of $\sqrt{s_\mathrm{NN}}=5.02$ TeV lead-lead collision data at the LHC with the ATLAS detector. Dimuon pairs are measured in the fiducial region $p_{\mathrm{T}\mu} > 4$ GeV, $\eta_{\mu} < 2.4$, invariant mass $m_{\mu\mu} > 10$ GeV, and $p_{\mathrm{T\mu\mu}} < 2$ GeV. [...]
arXiv:2011.12211; CERN-EP-2020-138.-
Geneva : CERN, 2021-08-19 - 50 p.
- Published in : Phys. Rev. C 104 (2021) 024906
Fulltext: 2011.12211 - PDF; ANA-HION-2016-02-PAPER - PDF; Fulltext from publisher: PDF; External link: Previous draft version
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1138.
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The ATLAS Fast TracKer system
/ ATLAS Collaboration
The ATLAS Fast TracKer (FTK) was designed to provide full tracking for the ATLAS high-level trigger by using pattern recognition based on Associative Memory (AM) chips and fitting in high-speed field programmable gate arrays. The tracks found by the FTK are based on inputs from all modules of the pixel and silicon microstrip trackers. [...]
arXiv:2101.05078; CERN-EP-2020-232.-
Geneva : CERN, 2021 - 64 p.
- Published in : JINST 16 (2021) P07006
Fulltext: PDF; Fulltext from publisher: PDF; External link: Previous draft version
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1147.
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Simple and statistically sound recommendations for analysing physical theories
/ AbdusSalam, Shehu S. (Shahid Beheshti U.) ; Agocs, Fruzsina J. (Cambridge U. ; Cambridge U., KICC) ; Allanach, Benjamin C. (Cambridge U., DAMTP) ; Athron, Peter (Monash U. ; Nanjing Normal U.) ; Balázs, Csaba (Monash U.) ; Bagnaschi, Emanuele (PSI, Villigen) ; Bechtle, Philip (Bonn U.) ; Buchmueller, Oliver (Imperial Coll., London) ; Beniwal, Ankit (Louvain U., CP3) ; Bhom, Jihyun (Cracow, INP) et al.
Physical theories that depend on many parameters or are tested against data from many different experiments pose unique challenges to statistical inference. Many models in particle physics, astrophysics and cosmology fall into one or both of these categories. [...]
arXiv:2012.09874; PSI-PR-20-23; BONN-TH-2020-11; CP3-20-59; KCL-PH-TH/2020-75,
P3H-20-080; TTP20-044; TUM-HEP-1310/20; IFT-UAM/CSIC-20-180; TTK-20-47,
CERN-TH-2020-215; FTPI-MINN-20-36; UMN-TH-4005/20; HU-EP-20/37; DESY 20-222,
ADP-20-33/T1143; DESY-20-222; Imperial/TP/2020/RT/04; UCI-TR-2020-19; gambit-review-2020.-
2022-04-29 - 15 p.
- Published in : Rep. Prog. Phys.
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1157.
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MoEDAL Run-3 Technical Proposal
/ Acharya, B ; Alexandre, J ; Benes, P ; Bergmann, B ; Bernabeu, J ; Bevan, A ; Branzas, H ; Burian, P ; Campbell, M ; Cecchini, S et al.
During LHC’s Run-2 the MoEDAL experiment took 6.7 inv. [...]
CERN-LHCC-2021-006 ; LHCC-P-017.
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2021.
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1174.
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Axion Dark Matter: What is it and Why Now?
/ Chadha-Day, Francesca (Durham U., IPPP) ; Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Marsh, David J.E. (King's Coll. London)
The axion has emerged in recent years as a leading particle candidate to provide the mysterious dark matter in the cosmos, as we review here for a general scientific audience. We describe first the historical roots of the axion in the Standard Model of particle physics and the problem of charge-parity invariance of the strong nuclear force. [...]
arXiv:2105.01406; KCL-PH-TH/2021-20; CERN-TH-2021-045; IPPP/20/91.-
2022-02 - 26 p.
- Published in : Sci. Adv. 8 (2022) abj3618
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1175.
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Storage Rings and Gravitational Waves: Summary and Outlook
/ Berlin, A. (New York U.) ; Brüggen, M. (Hamburg U.) ; Buchmueller, O. (Imperial Coll., London) ; Chen, P. (Taiwan, Natl. Taiwan U.) ; D'Agnolo, R.T. (IPhT, Saclay) ; Deng, R. (CAS, SARI, Shanghai) ; Ellis, J.R. (King's Coll. London) ; Ellis, S. (IPhT, Saclay) ; Franchetti, G. (Darmstadt, GSI) ; Ivanov, A. (Vienna U.) et al.
We report some highlights from the ARIES APEC workshop on ``Storage Rings and Gravitational Waves'' (SRGW2021), held in virtual space from 2 February to 18 March 2021, and sketch a tentative landscape for using accelerators and associated technologies for the detection or generation of gravitational waves..
arXiv:2105.00992 ; KCL-PH-TH/2021-28 ; CERN-TH-2021-068.
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17 p.
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1177.
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r-Process Radioisotopes from Near-Earth Supernovae and Kilonovae
/ Wang (王夕露), Xilu ; Clark, Adam M. ; Ellis, John ; Ertel, Adrienne F. ; Fields, Brian D. ; Fry, Brian J. ; Liu, Zhenghai ; Miller, Jesse A. ; Surman, Rebecca
The astrophysical sites where r-process elements are synthesized remain mysterious: it is clear that neutron star mergers (kilonovae (KNe)) contribute, and some classes of core-collapse supernovae (SNe) are also likely sources of at least the lighter r-process species. The discovery of 60Fe on the Earth and Moon implies that one or more astrophysical explosions have occurred near the Earth within the last few million years, probably SNe. [...]
arXiv:2105.05178; KCL-PH-TH/2021-03; CERN-TH-2021-014; N3AS-21-007.-
2021-12-23 - 45 p.
- Published in : Astrophys. J. 923 (2021) 219
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1182.
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Configuration and performance of the ATLAS $b$-jet triggers in Run 2
/ ATLAS Collaboration
Several improvements to the ATLAS triggers used to identify jets containing $b$-hadrons ($b$-jets) were implemented for data-taking during Run 2 of the Large Hadron Collider from 2016 to 2018. These changes include reconfiguring the $b$-jet trigger software to improve primary-vertex finding and allow more stable running in conditions with high pile-up, and the implementation of the functionality needed to run sophisticated taggers used by the offline reconstruction in an online environment. [...]
arXiv:2106.03584; CERN-EP-2021-032.-
Geneva : CERN, 2021-12-09 - 45 p.
- Published in : Eur. Phys. J. C 81 (2021) 1087
Fulltext: 2106.03584 - PDF; ANA-TRIG-2018-08-PAPER - PDF; document - PDF; External link: Previous draft version
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1186.
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Performance of the MICE diagnostic system
/ Mice Collaboration
Muon beams of low emittance provide the basis for the intense, well-characterised neutrino beams of a neutrino factory and for multi-TeV lepton-antilepton collisions at a muon collider. The international Muon Ionization Cooling Experiment (MICE) has demonstrated the principle of ionization cooling, the technique by which it is proposed to reduce the phase-space volume occupied by the muon beam at such facilities. [...]
arXiv:2106.05813; RAL-P-2021-001.-
2021-08-16 - 27 p.
- Published in : JINST 16 (2021) P08046
Fulltext: 2106.05813 - PDF; fermilab-pub-21-284-ad-nd - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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1191.
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Flipped ${g_\mu - 2}$
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Evans, Jason L. (Tsung-Dao Lee Inst., Shanghai ; Shanghai Jiao Tong U.) ; Nagata, Natsumi (Tokyo U.) ; Nanopoulos, Dimitri V. (Texas A-M ; Baylor U. ; HARC, Woodlands ; Athens Academy ; Athens U.) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
We analyze the possible magnitude of the supersymmetric contribution to $g_\mu - 2$ in a flipped SU(5) GUT model. Unlike other GUT models which are severely constrained by universality relations, in flipped SU(5) the U(1) gaugino mass and the soft supersymmetry-breaking masses of right-handed sleptons are unrelated to the other gaugino, slepton and squark masses. [...]
arXiv:2107.03025; KCL-PH-TH/2021-46,CERN-TH-2021-099; ACT-1-21; MI-HET-751,
UMN-TH-4018/21; FTPI-MINN-21/11.-
2021-12-07 - 10 p.
- Published in : Eur. Phys. J. C 81 (2021) 1079
Fulltext: 2107.03025 - PDF; document - PDF;
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1193.
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The Pollica perspective on the (super)-conformal world
/ Alday, Fernando (Oxford U., Inst. Math.) ; Argyres, Philip (Cincinnati U.) ; Lemos, Madalena (CERN) ; Martone, Mario (Texas U. ; YITP, Stony Brook ; Stony Brook U., New York, SCGP) ; Rastelli, Leonardo (YITP, Stony Brook) ; Taronna, Massimo (Naples U. ; INFN, Naples ; Princeton U.) ; Mukhi, Sunil (IISER, Pune) ; Córdova, Lucía (ENS, Paris, IPM) ; He, Yifei (IPhT, Saclay) ; Kruczenski, Martin (Purdue U. ; Purdue U., West Lafayette) et al.
This manuscript samples a series of recent results in the quest for a systematic understanding of the space of conformal field theories, with a particular focus on theories with extended supersymmetry. The large majority of results reported here were presented during the second Pollica summer workshop which took place from June 3–21 2019 and focused on mathematical and geometric tools for superconformal field theories. [...]
2021 - 61 p.
- Published in : J. Phys. A 54 (2021) 303001
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1198.
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Prospective Sensitivities of Atom Interferometers to Gravitational Waves and Ultralight Dark Matter
/ Badurina, Leonardo (King's Coll. London) ; Buchmueller, Oliver (Imperial Coll., London) ; Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Lewicki, Marek (Warsaw U.) ; McCabe, Christopher (King's Coll. London) ; Vaskonen, Ville (Barcelona, IFAE)
We survey the prospective sensitivities of terrestrial and space-borne atom interferometers (AIs) to gravitational waves (GWs) generated by cosmological and astrophysical sources, and to ultralight dark matter. We discuss the backgrounds from gravitational gradient noise (GGN) in terrestrial detectors, and also binary pulsar and asteroid backgrounds in space-borne detectors. [...]
arXiv:2108.02468; AION-REPORT/2021-04; KCL-PH-TH/2021-61; CERN-TH-2021-116.-
2022-02-07 - 18 p.
- Published in : Philos. Trans. R. Soc. Lond. A 380 (2022) 20210060
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1225.
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Observation of triple J/$\psi$ meson production in proton-proton collisions at $\sqrt{s} = $ 13 TeV
/ CMS Collaboration
The first observation of the simultaneous production of three J/$\psi$ mesons in proton-proton (pp) collisions is presented, based on a data sample collected by the CMS experiment at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 133 fb$^{-1}$. The ${\mathrm{p}}{\mathrm{p}}\to\mathrm{J}/\psi\,\mathrm{J}/\psi\,\mathrm{J}/\psi\,\mathrm{X}$ process is observed with a significance above five standard deviations in final states with three $\mu\mu$ pairs. [...]
arXiv:2111.05370; CMS-BPH-21-004; CERN-EP-2021-215; CMS-BPH-21-004-003.-
Geneva : CERN, 2023-01-19 - 13 p.
Fulltext: 2111.05370 - PDF; fermilab-pub-21-624-cms - PDF; Fulltext from Publisher: cms_J_psi - PDF; s41567-022-01838-y - PDF; External link: Fermilab Library Server
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1228.
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AEDGE: Atomic experiment for dark matter and gravity exploration in space
/ Bertoldi, Andrea (LP2N, Bordeaux) ; Bongs, Kai (Birmingham U.) ; Bouyer, Philippe (LP2N, Bordeaux) ; Buchmueller, Oliver (Imperial Coll., London) ; Canuel, Benjamin (LP2N, Bordeaux) ; Caramete, Laurentiu-Ioan (Bucharest, Inst. Space Science) ; Chiofalo, Maria Luisa (Pisa U.) ; Coleman, Jonathon (Liverpool U.) ; De Roeck, Albert (Antwerp U. ; CERN) ; Ellis, John (King's Coll. London ; NICPB, Tallinn ; CERN) et al.
This article contains a summary of the White Paper submitted in 2019 to the ESA Voyage 2050 process, which was subsequently published in EPJ Quantum Technology (AEDGE Collaboration et al. EPJ Quant. [...]
2021 - 10 p.
- Published in : Exp. Astron. 51 (2021) 1417-1426
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1235.
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BICEP/Keck Constraints on Attractor Models of Inflation and Reheating
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Garcia, Marcos A.G. (Mexico U.) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.)
Recent BICEP/Keck data on the cosmic microwave background, in combination with previous WMAP and Planck data, impose strong new constraints on the tilt in the scalar perturbation spectrum, $n_s$, as well as the tensor-to-scalar ratio, $r$. These constrain the number of e-folds of inflation, $N_*$, the magnitude of the inflaton coupling to matter, $y$, and the reheating temperature, $T_{\rm reh}$, which we evaluate in attractor models of inflation as formulated in no-scale supergravity. [...]
arXiv:2112.04466; KCL-PH-TH/2021-90; CERN-TH-2021-199; ACT-06-21; MI-HET-769,
UMN-TH-4107/21; FTPI-MINN-21/26.-
2022-02-03 - 9 p.
- Published in : Phys. Rev. D 105 (2022) 043504
Fulltext: 2112.04466 - PDF; PhysRevD.105.043504 - PDF;
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1240.
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Hadron collider probes of the quartic couplings of gluons to the photon and $Z$ boson
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Ge, Shao-Feng (Shanghai Jiaotong U. ; Tsung-Dao Lee Inst., Shanghai ; Shanghai Jiao Tong U.) ; Ma, Kai (Shanghai Jiaotong U. ; Tsung-Dao Lee Inst., Shanghai ; HIAS, UCAS, Hangzhou ; ICTP-AP, Beijing ; Shaanxi U. Tech.)
We explore the experimental sensitivities of measuring the $gg \rightarrow Z \gamma$ process at the LHC to the dimension-8 quartic couplings of gluon pairs to the $Z$ boson and photon, in addition to comparing them with the analogous sensitivities in the $gg \to \gamma \gamma$ process. These processes can both receive contributions from 4 different CP-conserving dimension-8 operators with distinct Lorentz structures that contain a pair of gluon field strengths, $\hat G^a_{\mu \nu}$, and a pair of electroweak SU(2) gauge field strengths, $W^i_{\mu \nu}$, as well as 4 similar operators containing a pair of $\hat G^a_{\mu \nu}$ and a pair of U(1) gauge field strengths, $B_{\mu \nu}$. [...]
arXiv:2112.06729; KCL-PH-TH/2021-95; CERN-TH-2021-215.-
2022-04-21 - 28 p.
- Published in : JHEP 2204 (2022) 123
Fulltext: 2112.06729 - PDF; document - PDF;
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1245.
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Proposed Lunar Measurements of $r$-Process Radioisotopes to Distinguish Origin of Deep-sea $^{244}$Pu
/ Wang, Xilu (Beijing, Inst. High Energy Phys. ; UC, Berkeley ; Notre Dame U.) ; Clark, Adam M. (Notre Dame U.) ; Ellis, John (King's Coll. London ; NICPB, Tallinn ; CERN) ; Ertel, Adrienne F. (Illinois U., Urbana) ; Fields, Brian D. (Illinois U., Urbana) ; Fry, Brian J. (AFIT, Ohio) ; Liu, Zhenghai (Illinois U., Urbana) ; Miller, Jesse A. (Illinois U., Urbana ; Boston U.) ; Surman, Rebecca (Notre Dame U.)
$^{244}$Pu has recently been discovered in deep-sea deposits spanning the past 10 Myr, a period that includes two $^{60}$Fe pulses from nearby supernovae. $^{244}$Pu is among the heaviest $r$-process products, and we consider whether it was created in the supernovae, which is disfavored by nucleosynthesis simulations, or in an earlier kilonova event that seeded $^{244}$Pu in the nearby interstellar medium that was subsequently swept up by the supernova debris. [...]
arXiv:2112.09607; KCL-PH-TH/2021-91; CERN-TH-2021-208; N3AS-21-017.-
2023-05-12 - 13 p.
- Published in : Astrophysics 948 (2023) 113
Fulltext: 2112.09607 - PDF; Publication - PDF;
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1258.
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Inclusive nonresonant multilepton probes of new phenomena at $\sqrt{s} = $ 13 TeV
/ CMS Collaboration
An inclusive search for nonresonant signatures of beyond the standard model (SM) phenomena in events with three or more charged leptons, including hadronically decaying $\tau$ leptons, is presented. The analysis is based on a data sample corresponding to an integrated luminosity of 138 fb$^{-1}$ of proton-proton collisions at $\sqrt{s} = $ 13 TeV, collected by the CMS experiment at the LHC in 2016-2018. [...]
arXiv:2202.08676; CMS-EXO-21-002; CERN-EP-2022-008; CMS-EXO-21-002-003.-
Geneva : CERN, 2022-06-01 - 78 p.
- Published in : Phys. Rev. D 105 (2022) 112007
Fulltext: CMS-EXO-21-002-arXiv - PDF; jt - PDF; CERN-EP-2022-008 - PDF; PhysRevD.105.112007 - PDF; 2202.08676 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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1263.
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Constraining the ${\mathcal {C}}{\mathcal {P}}$ structure of Higgs-fermion couplings with a global LHC fit, the electron EDM and baryogenesis
/ Bahl, Henning (Chicago U. ; Chicago U., EFI) ; Fuchs, Elina (CERN ; Leibniz U., Hannover ; Braunschweig, Phys. Tech. Bund.) ; Heinemeyer, Sven (Madrid, IFT) ; Katzy, Judith (DESY) ; Menen, Marco (Cologne U. ; Bonn U. ; Braunschweig, Phys. Tech. Bund.) ; Peters, Krisztian (DESY) ; Saimpert, Matthias (IRFU, Saclay) ; Weiglein, Georg (DESY ; Hamburg U., Inst. Exp. Phys. II)
CP violation in the Higgs couplings to fermions is an intriguing, but not yet extensively explored possibility. We use inclusive and differential LHC Higgs boson measurements to fit the CP structure of the Higgs Yukawa couplings. [...]
arXiv:2202.11753; CERN-TH-2021-231; DESY-22-033; EFI-22-1; IFT--UAM/CSIC--21-148.-
2022-07-10 - 52 p.
- Published in : Eur. Phys. J. C 82 (2022) 604
Fulltext: document - PDF; 2202.11753 - PDF;
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1270.
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Dynamical spin chains in 4D N = 2 SCFTs
/ Pomoni, Elli (speaker) (DESY)
In this talk we will revisit the study of spin chains capturing the spectral problem of 4d N = 2 SCFTs in the planar limit. At one loop and in the quantum plane limit, we will discover a quasi-Hopf symmetry algebra, defined by the R-matrix read off from the superpotential. [...]
2022 - 1:06:53.
TH String Theory Seminar
External link: Event details
In : Dynamical spin chains in 4D N = 2 SCFTs
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1272.
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The Forward Physics Facility at the High-Luminosity LHC
/ Feng, Jonathan L. (UC, Irvine) ; Kling, Felix (DESY) ; Reno, Mary Hall (Iowa U.) ; Rojo, Juan (Amsterdam U. ; Nikhef, Amsterdam) ; Soldin, Dennis (Delaware U., Bartol Inst.) ; Anchordoqui, Luis A. (Lehman Coll.) ; Boyd, Jamie (CERN) ; Ismail, Ahmed (Oklahoma State U.) ; Harland-Lang, Lucian (Oxford U. ; Oxford U., Theor. Phys.) ; Kelly, Kevin J. (CERN) et al.
High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along the beam collision axis, outside of the acceptance of existing LHC experiments. [...]
arXiv:2203.05090 ; UCI-TR-2022-01 ; CERN-PBC-Notes-2022-001,
FERMILAB-PUB-22-094-ND-SCD-T ; INT-PUB-22-006 ; BONN-TH-2022-04.
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429 p.
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1273.
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Light-by-Light Scattering at Future $e^+e^-$ Colliders
/ Ellis, John (King's Coll. London ; NICPB, Tallinn ; CERN) ; Mavromatos, Nick E. (King's Coll. London ; Natl. Tech. U., Athens) ; Roloff, Philipp (CERN) ; You, Tevong (CERN ; Cambridge U., DAMTP ; Cambridge U.)
We study the sensitivity of possible CLIC and FCC-ee measurements of light-by-light scattering to old and new physics, including the Heisenberg-Euler Lagrangian in the Standard Model with possible contributions from loops of additional charged particles or magnetic monopoles, the Born-Infeld extension of QED, and effective dimension-8 operators involving four electromagnetic field strengths as could appear in the Standard Model Effective Field Theory. We find that FCC-ee measurements at 365 GeV and CLIC measurements at 350 GeV would be sensitive to new physics scales of half a TeV in the dimension-8 operator coefficients, and that CLIC measurements at 1.4 TeV or 3 TeV would be sensitive to new physics scales {$\sim 2$ TeV or 5 TeV} at 95% CL, corresponding to probing loops of new particles with masses up to $\sim 3.7$ TeV {for large charges and/or multiple species}. [...]
arXiv:2203.17111; KCL-PH-TH/2022-02; CERN-TH-2022-011.-
2022-07-23 - 26 p.
- Published in : Eur. Phys. J. C
Fulltext: document - PDF; 2203.17111 - PDF;
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1274.
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Snowmass2021 Cosmic Frontier White Paper: Puzzling Excesses in Dark Matter Searches and How to Resolve Them
/ Leane, Rebecca K. (SLAC ; KIPAC, Menlo Park) ; Shin, Seodong (Jeonbuk Natl. U.) ; Yang, Liang (UC, San Diego) ; Adhikari, Govinda (UC, San Diego) ; Alhazmi, Haider (Jazan U.) ; Aramaki, Tsuguo (Northeastern U.) ; Baxter, Daniel (Fermilab) ; Calore, Francesca (Annecy, LAPTH) ; Caputo, Regina (NASA, Goddard) ; Cholis, Ilias (Oakland U.) et al.
Intriguing signals with excesses over expected backgrounds have been observed in many astrophysical and terrestrial settings, which could potentially have a dark matter origin. [...]
arXiv:2203.06859 ; FERMILAB-CONF-22-191-PPD-T.
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57 p.
Fermilab Library Server - eConf - Fulltext - Fulltext
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1277.
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Quantum gravity phenomenology at the dawn of the multi-messenger era—A review
/ Addazi, A. (SCU, Chengdu ; Frascati) ; Alvarez-Muniz, J. (Santiago de Compostela U., IGFAE) ; Alves Batista, R. (Madrid, IFT) ; Amelino-Camelia, G. (Naples U. ; INFN, Naples) ; Antonelli, V. (Milan U. ; INFN, Milan) ; Arzano, M. (Naples U. ; INFN, Naples) ; Asorey, M. (Zaragoza U.) ; Atteia, J.-L. (IRAP, Toulouse) ; Bahamonde, S. (Tartu, Inst. Phys. ; Tokyo Inst. Tech.) ; Bajardi, F. (Naples U.) et al.
The exploration of the universe has recently entered a new era thanks to the multi-messenger paradigm, characterized by a continuous increase in the quantity and quality of experimental data that is obtained by the detection of the various cosmic messengers (photons, neutrinos, cosmic rays and gravitational waves) from numerous origins. They give us information about their sources in the universe and the properties of the intergalactic medium. [...]
arXiv:2111.05659.-
2022-07 - 119 p.
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1278.
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Theory: Historical perspective and what have we learned from the Higgs so far
/ Ellis, Jonathan R. (speaker) (University of London (GB))
Abstract:
This lecture will start with a summary of the history of spontaneous symmetry breaking in superconductivity and its application to particle physics by Englert, Brout and Higgs. This will be followed by a brief review of phenomenological studies of the Higgs boson prior to the LHC start-up. [...]
2022 - 1:15:40.
Academic Training Lecture Regular Programme, 2021-2022
External link: Event details
In : Theory: Historical perspective and what have we learned from the Higgs so far
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1279.
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Probing Neutral Triple Gauge Couplings at the LHC and Future Hadron Colliders
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn ; Tsung-Dao Lee Inst., Shanghai ; SKLPPC, Shanghai) ; He, Hong-Jian (Tsung-Dao Lee Inst., Shanghai ; SKLPPC, Shanghai ; Tsinghua U., Beijing ; Tsinghua U., Beijing, CHEP) ; Xiao, Rui-Qing (King's Coll. London ; Tsung-Dao Lee Inst., Shanghai ; SKLPPC, Shanghai)
We study probes of neutral triple gauge couplings (nTGCs) at the LHC and the proposed 100TeV $pp$ colliders, and compare their sensitivity reaches with those of the proposed $e^+ e^-$ colliders. The nTGCs provide a unique window to the new physics beyond the Standard Model (SM) because they can arise from SM effective field theory (SMEFT) operators that respect the full electroweak gauge group $SU(2)_L\otimes U(1)_Y$ of the SM only at the level of dimension-8 or higher. [...]
arXiv:2206.11676; KCL-PH-TH/2022-35; CERN-TH-2022-089.-
2023-02-01 - 57 p.
- Published in : Phys. Rev. D 107 (2023) 035005
Fulltext: 2206.11676 - PDF; Publication - PDF;
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1281.
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Smashing Science
/ McNitt, Eliza (Filmmaker)
In 2009 twelve high school students won the Intel International Science and Engineering Fair's "Best of Category" Award. The prize? A trip to Geneva, Switzerland to explore CERN [...]
IPPOG-RDB-2022-061.-
Geneva : CERN, 2011
- Published in : Film
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1282.
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Hands-on- & Minds-on- Teilchenphysikexperimente im CERN-Schülerlabor S’Cool LAB
/ Woithe, Julia (CERN) ; Kuhn, Jochen ; Müller, Andreas ; Schmeling, Sascha (CERN)
Spannender und kognitiv aktivierender Unterricht sollte Jugendlichen die Möglichkeit geben, sich selbsttätig mit einem für sie interessanten Unterrichtsgegenstand zu beschäftigen und dabei ihre bestehenden Wissensstrukturen zu erweitern, z. B. [...]
2020
- Published in : 10.1007/978-3-662-61607-9_7
In : Kohärenz im Unterricht der Elementarteilchenphysik : Tagungsband des Symposiums zur Didaktik der Teilchenphysik, Wuppertal 2018, Wuppertal, Germany, 20 - 21 Oct 2018, pp.107-119
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1283.
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Snowmass Theory Frontier: Astrophysics and Cosmology
/ Green, Daniel (UC, San Diego) ; Ruderman, Joshua T. (New York U., CCPP) ; Safdi, Benjamin R. (UC, Berkeley) ; Shelton, Jessie (Illinois U., Urbana) ; Achucarro, Ana (Leiden U.) ; Adshead, Peter (Illinois U., Urbana) ; Akrami, Yashar (Case Western Reserve U. ; Imperial Coll., London) ; Baryakhtar, Masha (Washington U., Seattle) ; Baumann, Daniel (Taiwan, Natl. Taiwan U. ; U. Amsterdam, GRAPPA) ; Berlin, Asher (Fermilab) et al.
We summarize progress made in theoretical astrophysics and cosmology over the past decade and areas of interest for the coming decade. [...]
arXiv:2209.06854 ; FERMILAB-PUB-22-721-T.
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57 p.
Fermilab Library Server - Fulltext - Fulltext
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1288.
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Cold atoms in space: community workshop summary and proposed road-map
/ Alonso, Iván (Balearic Islands U.) ; Alpigiani, Cristiano (Washington U., Seattle) ; Altschul, Brett (South Carolina U.) ; Araújo, Henrique (Imperial Coll., London) ; Arduini, Gianluigi (CERN) ; Arlt, Jan (Aarhus U.) ; Badurina, Leonardo (King's Coll. London) ; Balaž, Antun (Belgrade, Inst. Phys.) ; Bandarupally, Satvika (Florence U. ; INFN, Florence) ; Barish, Barry C. (LIGO Lab., Caltech) et al.
We summarize the discussions at a virtual Community Workshop on Cold Atoms in Space concerning the status of cold atom technologies, the prospective scientific and societal opportunities offered by their deployment in space, and the developments needed before cold atoms could be operated in space. The cold atom technologies discussed include atomic clocks, quantum gravimeters and accelerometers, and atom interferometers. [...]
arXiv:2201.07789; FERMILAB-CONF-22-694-V; CERN-TH-2022-004.-
2022-11-20 - 64 p.
- Published in : EPJ Quant. Technol.: 9 (2022) , no. 1, pp. 30
Fulltext: bb4d1d31d6edd562e94939489bfc05d6 - PDF; 2201.07789 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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1289.
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Prospects for Future Binary Black Hole GW Studies in Light of PTA Measurements
/ Ellis, John (CERN ; King's Coll. London ; Unlisted, EE) ; Fairbairn, Malcolm (King's Coll. London) ; Hütsi, Gert (Unlisted, EE) ; Raidal, Martti (Unlisted, EE) ; Urrutia, Juan (Unlisted, EE ; NICPB, Tallinn) ; Vaskonen, Ville (Unlisted, EE ; Padua U. ; INFN, Padua) ; Veermäe, Hardi (Unlisted, EE)
NANOGrav and other Pulsar Timing Arrays (PTAs) have discovered a common-spectrum process in the nHz range that may be due to gravitational waves (GWs): if so, they are likely to have been generated by black hole (BH) binaries with total masses $> 10^9 M_{\odot}$. Using the Extended Press-Schechter formalism to model the galactic halo mass function and a simple relation between the halo and BH masses suggests that these binaries have redshifts $z = {O}(1)$ and mass ratios $\gtrsim 10$, and that the GW signal at frequencies above ${O}(10)$~nHz may be dominated by relatively few binaries that could be distinguished experimentally and would yield observable circular polarization. [...]
arXiv:2301.13854; KCL-PH-TH/2023-04; CERN-TH-2023-008; AION-REPORT/2023-1.-
2023-08-01 - 13 p.
- Published in : Astron. Astrophys. 676 (2023) A38
Fulltext: document - PDF; Publication - PDF; 2301.13854 - PDF;
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1295.
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Axion Dark Matter
/ Adams, C.B. (Columbia U.) ; Aggarwal, N. ; Agrawal, A. (Chicago U.) ; Balafendiev, R. (ITMO U., St. Petersburg) ; Bartram, C. (Washington U., Seattle) ; Baryakhtar, M. (Washington U., Seattle) ; Bekker, H. (Helmholtz Inst., Mainz ; Mainz U.) ; Belov, P. (ITMO U., St. Petersburg) ; Berggren, K.K. (MIT) ; Berlin, A. (Fermilab) et al.
Axions are well-motivated dark matter candidates with simple cosmological production mechanisms. [...]
arXiv:2203.14923 ; FERMILAB-CONF-22-996-PPD-T.
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96 p.
eConf - Fermilab Library Server - Fulltext - Fulltext
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1296.
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A Long-Baseline Atom Interferometer at CERN: Conceptual Feasibility Study
/ Arduini, G. (CERN) ; Badurina, L. (King's Coll. London) ; Balazs, K. (CERN) ; Baynham, C. (Imperial Coll., London) ; Buchmueller, O. (Imperial Coll., London ; Oxford U.) ; Buzio, M. (CERN) ; Calatroni, S. (CERN) ; Corso, J.-P. (CERN) ; Ellis, J. (CERN ; King's Coll. London) ; Gaignant, Ch. (CERN) et al.
We present results from exploratory studies, supported by the Physics Beyond Colliders (PBC) Study Group, of the suitability of a CERN site and its infrastructure for hosting a vertical atom interferometer (AI) with a baseline of about 100 m. [...]
arXiv:2304.00614 ; CERN-PBC Report-2023-002.
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51 p.
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1307.
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Observation of the rare decay of the $ \eta $ meson to four muons
/ CMS Collaboration
A search for the rare $ \eta \to \mu^{+} \mu^{-} \mu^{+} \mu^{-} $ double-Dalitz decay is performed using a sample of proton-proton collisions, collected by the CMS experiment at the CERN LHC with high-rate muon triggers in 2017-2018 and corresponding to an integrated luminosity of 101 fb$ ^{-1} $. A signal having a statistical significance well in excess of 5 standard deviations is observed. [...]
arXiv:2305.04904; CMS-BPH-22-003; CERN-EP-2023-071; CMS-BPH-22-003-003.-
Geneva : CERN, 2023-09-01 - 31 p.
- Published in : Phys. Rev. Lett. 131 (2023) 091903
Fulltext: 2305.04904 - PDF; CMS-BPH-21-003-arXiv - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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1320.
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Search for dark photons in rare $Z$ boson decays with the ATLAS detector
/ ATLAS Collaboration
A search for events with a dark photon produced in association with a dark Higgs boson via rare decays of the Standard Model $Z$ boson is presented, using 139 fb$^{-1}$ of $\sqrt{s} = 13$ TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider. The dark Higgs boson decays into a pair of dark photons, and at least two of the three dark photons must each decay into a pair of electrons or muons, resulting in at least two same-flavor opposite-charge lepton pairs in the final state. [...]
arXiv:2306.07413; CERN-EP-2023-107.-
Geneva : CERN, 2023-12-18 - 23 p.
- Published in : Phys. Rev. Lett. 131 (2023) 251801
Fulltext: ATLAS-CONF-2023-016 - PDF; Publication - PDF; 2306.07413 - PDF; External link: Previous draft version
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1322.
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Fast b-tagging at the high-level trigger of the ATLAS experiment in LHC Run 3
/ ATLAS Collaboration
The ATLAS experiment relies on real-time hadronic jet reconstruction and $b$-tagging to record fully hadronic events containing $b$-jets. These algorithms require track reconstruction, which is computationally expensive and could overwhelm the high-level-trigger farm, even at the reduced event rate that passes the ATLAS first stage hardware-based trigger. [...]
arXiv:2306.09738; CERN-EP-2023-111.-
2023-11-10 - 37 p.
- Published in : JINST 18 (2023) P11006
Fulltext: document - PDF; 2306.09738 - PDF;
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1325.
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Gravitational Waves from SMBH Binaries in Light of the NANOGrav 15-Year Data
/ Ellis, John (Unlisted, EE ; King's Coll. London ; CERN) ; Fairbairn, Malcolm (King's Coll. London) ; Hütsi, Gert (Unlisted, EE) ; Raidal, Juhan (Unlisted, EE) ; Urrutia, Juan (Unlisted, EE ; NICPB, Tallinn) ; Vaskonen, Ville (Unlisted, EE ; Padua U. ; INFN, Padua) ; Veermäe, Hardi (Unlisted, EE)
The NANOGrav Collaboration has recently announced evidence for nHz gravitational waves (GWs), in the form of a Hellings-Downs angular correlation in the common-spectrum process that had been observed previously by them and other Pulsar Timing Arrays (PTAs). We analyze the possibility that these GWs originate from binary supermassive black holes (SMBHs) with total masses $\gtrsim 10^9\, M_{\odot}$. [...]
arXiv:2306.17021; KCL-PH-TH/2023-37; CERN-TH-2023-120; AION-REPORT/2023-06.-
2024-01-10 - 11 p.
- Published in : Phys. Rev. D 109 (2024) L021302
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1329.
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Pursuit of paired dijet resonances in the Run 2 dataset with ATLAS
/ ATLAS Collaboration
New particles with large masses that decay into hadronically interacting particles are predicted by many models of physics beyond the Standard Model. A search for a massive resonance that decays into pairs of dijet resonances is performed using 140 fb-1 of proton-proton collisions at sqrt(s)=13 TeV recorded by the ATLAS detector during Run 2 of the Large Hadron Collider. [...]
arXiv:2307.14944.-
2023-12-01 - 30 p.
- Published in : Phys. Rev. D 108 (2023) 112005
Fulltext: Publication - PDF; 2307.14944 - PDF;
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1333.
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Measurement of the Higgs boson production via vector boson fusion and its decay into bottom quarks in proton-proton collisions at $ \sqrt{s}= $ 13 TeV
/ CMS Collaboration
A measurement of the Higgs boson (H) production via vector boson fusion (VBF) and its decay into a bottom quark-antiquark pair ($ \mathrm{b} \overline{\mathrm{b}} $) is presented using proton-proton collision data recorded by the CMS experiment at $ \sqrt{s}= $ 13 TeV and corresponding to an integrated luminosity of 90.8 fb$ ^{-1} $. Treating the gluon-gluon fusion process as a background and constraining its rate to the value expected in the standard model (SM) within uncertainties, the signal strength of the VBF process, defined as the ratio of the observed signal rate to that predicted by the SM, is measured to be $ {\mu^{\mathrm{q}\mathrm{q}\mathrm{H}}_{\mathrm{H}\mathrm{b}\overline{\mathrm{b}}}}= $ 1.01$ ^{+0.55}_{-0.46} $. [...]
arXiv:2308.01253; CMS-HIG-22-009; CERN-EP-2023-110; CMS-HIG-22-009-003.-
Geneva : CERN, 2024-01-30 - 48 p.
Fulltext: 2308.01253 - PDF; FERMILAB-PUB-23-447-CMS - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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1338.
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What is the source of the PTA GW signal?
/ Ellis, John (NICPB, Tallinn ; King's Coll. London ; CERN) ; Fairbairn, Malcolm (King's Coll. London) ; Franciolini, Gabriele (Rome U. ; INFN, Rome) ; Hütsi, Gert (NICPB, Tallinn) ; Iovino, Antonio (NICPB, Tallinn ; Rome U. ; INFN, Rome) ; Lewicki, Marek (Warsaw U.) ; Raidal, Martti (NICPB, Tallinn) ; Urrutia, Juan (NICPB, Tallinn ; Tallinn U. Tech.) ; Vaskonen, Ville (NICPB, Tallinn ; Padua U. ; INFN, Padua) ; Veermäe, Hardi (NICPB, Tallinn)
The most conservative interpretation of the nHz stochastic gravitational wave background (SGWB) discovered by NANOGrav and other Pulsar Timing Array (PTA) Collaborations is astrophysical, namely that it originates from supermassive black hole (SMBH) binaries. However, alternative cosmological models have been proposed, including cosmic strings, phase transitions, domain walls, primordial fluctuations and "audible" axions. [...]
arXiv:2308.08546; KCL-PH-TH/2023-43; CERN-TH-2023-153; AION-REPORT/2023-08.-
2024-01-15 - 22 p.
- Published in : Phys. Rev. D 109 (2024) 023522
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1357.
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Terrestrial Very-Long-Baseline Atom Interferometry: Workshop Summary
Terrestrial Very-Long-Baseline Atom Interferometry Workshop (TVLBAI 2023)
13 - 14 Mar 2023
- CERN, Geneva, Switzerland
/ Abend, Sven (Leibniz U., Hannover); Allard, Baptiste (LCAR, Toulouse); Alonso, Iván (Balearic Islands U.); Antoniadis, John (Crete U.); Araújo, Henrique (Imperial Coll., London); Arduini, Gianluigi (CERN); Arnold, Aidan S. (SUPA, UK ; Strathclyde U.); Aßmann, Tobias (Ulm U.); Augst, Nadja (DLR, Neustrelitz); Badurina, Leonardo (King's Coll. London ; Caltech) et al.
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around the world to discuss the exciting developments in large-scale atom interferometer (AI) prototypes and their potential for detecting ultralight dark matter and gravitational waves. [...]
2023 - 99 p.
arXiv:2310.08183
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1360.
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Could a Kilonova Kill: a Threat Assessment
/ Perkins, Haille M.L. ; Ellis, John ; Fields, Brian D. ; Hartmann, Dieter H. ; Liu, Zhenghai ; McLaughlin, Gail C. ; Surman, Rebecca ; Wang, Xilu
Binary neutron star mergers (BNS) produce high-energy emissions from several physically different sources, including a gamma-ray burst (GRB) and its afterglow, a kilonova, and, at late times, a remnant many parsecs in size. Ionizing radiation from these sources can be dangerous for life on Earth-like planets when located too close. [...]
arXiv:2310.11627; KCL-PH-TH/2023-55; CERN-TH-2023-190.-
2024-01-24 - 21 p.
- Published in : Astrophys. J. 961 (2024) 170
Fulltext: 2310.11627 - PDF; document - PDF;
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1376.
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Classifying the CP properties of the ggH coupling in H+2j production
/ Bahl, Henning (Chicago U. ; Chicago U., EFI) ; Fuchs, Elina (CERN ; Leibniz U., Hannover ; Braunschweig, Phys. Tech. Bund.) ; Hannig, Marc (Leibniz U., Hannover) ; Menen, Marco (Leibniz U., Hannover ; Braunschweig, Phys. Tech. Bund.)
The Higgs-gluon interaction is crucial for LHC phenomenology. [...]
arXiv:2309.03146.
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1377.
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Probing Supermassive Black Hole Seed Scenarios with Gravitational-wave Measurements
/ Ellis, John (King's Coll. London ; CERN) ; Fairbairn, Malcolm (King's Coll. London) ; Urrutia, Juan ; Vaskonen, Ville
The process whereby the supermassive black holes populating the centers of galaxies have been assembled remains to be established, with the relative importance of seeds provided by collapsed Population-III stars, black holes formed in nuclear star clusters via repeated mergers, or direct collapses of protogalactic disks yet to be determined. In this paper we study the prospects for casting light on this issue by future measurements of gravitational waves emitted during the inspirals and mergers of pairs of intermediate-mass black holes, discussing in particular the roles of prospective measurements by LISA and the proposed atom interferometers AION and AEDGE. [...]
arXiv:2312.02983; KCL-PH-TH/2023-69; CERN-TH-2023-227.-
2024-03-11 - 7 p.
- Published in : Astrophys. J. 964 (2024) 11
Fulltext: document - PDF; 2312.02983 - PDF;
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1387.
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Interference Effects in $\mathbf{gg \to H \to Z \gamma}$ Beyond Leading Order
/ Buccioni, Federico (Munich, Tech. U.) ; Devoto, Federica (U. Oxford (main)) ; Djouadi, Abdelhak (Granada U.) ; Ellis, John (King's Coll. London ; CERN) ; Quevillon, Jérémie (Annecy, LAPTH) ; Tancredi, Lorenzo (Munich, Tech. U.)
The ATLAS and CMS collaborations at the LHC have recently announced evidence for the rare Higgs boson decay into a $Z$ boson and a photon. We analyze the interference between the process $gg\! \to \! H \! \to \! Z \gamma$ induced by loops of heavy particles, which is by far the dominant contribution to the signal, and the continuum $gg \to Z \gamma$ QCD background process mediated by light quark loops. [...]
arXiv:2312.12384; KCL-PH-TH/2023-70; CERN-TH-2023-228; TUM-HEP-1488/23; OUTP-23-18P.-
2024-03-24 - 6 p.
- Published in : Phys. Lett. B 851 (2024) 138596
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1411.
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Systematically testing singlet models for (g − 2)$_{μ}$
/ Capdevilla, Rodolfo (Toronto U. ; Perimeter Inst. Theor. Phys.) ; Curtin, David (Toronto U.) ; Kahn, Yonatan (Illinois U., Urbana (main) ; Illinois U., Urbana) ; Krnjaic, Gordan (Fermilab ; Chicago U., Astron. Astrophys. Ctr. ; Chicago U., KICP)
We comprehensively study all viable new-physics scenarios that resolve the muon $(g-2)_\mu$ anomaly with only Standard Model singlet particles coupled to muons via renormalizable interactions. Since such models are only viable in the MeV -- TeV mass range and require sizable muon couplings, they predict abundant accelerator production through the same interaction that resolves the anomaly. [...]
arXiv:2112.08377; FERMILAB-PUB-21-737-T.-
2022 - 32 p.
- Published in : JHEP 2204 (2022) 129
Fulltext: fermilab-pub-21-737-t - PDF; 2112.08377 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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1424.
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Lighting up the Dark on the Quantum Tabletop
/ Ellis, Sebastian (speaker) (Universite de Geneve (CH))
Several open questions in particle physics could be addressed through the observation of extremely weakly coupled signals. In this talk, we will explore how tabletop(-ish) experiments operating at or near the so-called "quantum limit" can search for such signals. [...]
2024 - 1:08:48.
Theory Colloquia
External link: Event details
In : Lighting up the Dark on the Quantum Tabletop
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