# CERN Preprints

Nyeste elementer:
2019-01-22
15:12
 Measurement of the mass and production rate of $\Xi_b^-$ baryons The first measurement of the production rate of $\Xi_b^-$ baryons in $pp$ collisions relative to that of $\Lambda_b^0$ baryons is reported, using data samples collected by the LHCb experiment, and corresponding to integrated luminosities of 1, 2 and 1.6~fb$^{-1}$ at $\sqrt{s}=7,~8$ and 13~TeV, respectively. [...] CERN-EP-2018-348 ; LHCB-PAPER-2018-047. - 2019. Fulltext - Previous draft version - Related data file(s)

2019-01-22
08:33
 Understanding sequential quarkonium suppression with $\Upsilon(nS)$ measurements in pp and PbPb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV / Park, Jaebeom (Korea U.) /CMS Collaboration The production cross sections of the $\Upsilon(1S)$, $\Upsilon(2S)$, and $\Upsilon(3S)$ states were measured separately using the CMS experimental apparatus, in proton-proton (pp) and lead-lead (PbPb) collisions at 5.02 TeV. The final results of the nuclear modification factors, $R_{AA}$, are reported of the three upsilon states as a function of transverse momentum ($p_{T}$), rapidity ($y$) and PbPb collision centrality. The data show a significant suppression of all three states following a sequential ordering, $R_{AA}(\Upsilon(1S)) > R_{AA}(\Upsilon(2S)) > R_{AA}(\Upsilon(3S))$. [...] CMS-CR-2018-418.- Geneva : CERN, 2018 - 6 p. Fulltext: PDF; In : Hard Probes 2018: International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, Aix-les-bains, France, 1 - 5 Oct 2018

2019-01-22
07:37
 3D energy deposition measurements with the GEMPix detector in a water phantom for hadron therapy / Leidner, J (CERN) ; Ciocca, M ; George, S P ; Mirandola, A ; Murtas, F ; Rimoldi, A ; Silari, M ; Tamborini, A In this paper we present 3D measurements of the energy deposition by a clinical carbon ion beam in a water phantom. [...] 2018.

2019-01-22
04:08
 Muon Colliders / Delahaye, Jean Pierre (CERN) ; Diemoz, Marcella (INFN, Rome) ; Long, Ken (Imperial Coll., London) ; Mansoulié, Bruno (IRFU, Saclay) ; Pastrone, Nadia (INFN, Turin) ; Rivkin, Lenny (PSI, Villigen) ; Schulte, Daniel (CERN) ; Skrinsky, Alexander (Novosibirsk, IYF) ; Wulzer, Andrea (CERN ; EPFL, Lausanne, LPTP ; Padua U.) Muon colliders have a great potential for high-energy physics. [...] arXiv:1901.06150. - 11 p. Fulltext

2019-01-22
04:07
 BE-HaPPY: Bias Emulator for Halo Power Spectrum including massive neutrinos / Valcin, David ; Villaescusa-Navarro, Francisco ; Verde, Licia ; Raccanelli, Alvise We study the clustering properties of dark matter halos in real- and redshift-space in cosmologies with massless and massive neutrinos through a large set of state-of-the-art N-body simulations. [...] CERN-TH-2019-005 ; arXiv:1901.06045. - 23 p. Full text

2019-01-22
04:07
 Form factors of two-hadron states from a covariant finite-volume formalism / Baroni, Alessandro (South Carolina U.) ; Briceño, Raúl A. (Jefferson Lab ; Old Dominion U.) ; Hansen, Maxwell T. (CERN) ; Ortega-Gama, Felipe G. (Jefferson Lab ; Coll. William and Mary) In this work we develop a Lorentz-covariant version of the previously derived formalism for relating finite-volume matrix elements to $\textbf 2 + \mathcal J \to \textbf 2$ transition amplitudes. [...] arXiv:1812.10504. - 42 p. Fulltext

2019-01-20
22:45
 Search for supersymmetry in events with a photon, jets, b-jets, and missing transverse momentum in proton-proton collisions at 13 TeV A search for supersymmetry is presented based on events with at least one photon, jets, and large missing transverse momentum produced in proton-proton collisions at a center-of-mass energy of 13 TeV. [...] CERN-EP-2018-353 ; CMS-SUS-18-002-003. - 2019. Additional information for the analysis - CMS AuthorList - Fulltext

2019-01-20
05:24
 Energy frontier lepton-hadron colliders, vector-like quarks and leptons, preons and so on / Sultansoy, Saleh (TOBB ETU, Ankara) First of all, an importance of the LHC and FCC based energy frontier lepton-hadron and photon-hadron colliders is emphasised. [...] arXiv:1901.00309. - 6 p. Fulltext

2019-01-18
15:37
 Measurement of exclusive Upsilon photoproduction in pPb collisions with the CMS experiment / Naskar, Kousik (Bhabha Atomic Res. Ctr.) /CMS Collaboration The aim of this study is to measure exclusive photoproduction of three resonant particles, $\bf \Upsilon(1S)$, $\bf \Upsilon(2S)$ and $\bf \Upsilon(3S)$ mesons,in their $\mu^{+}\mu^{-}$ decay modes, in ultraperipheral pPb collisions.The $\bf \Upsilon(1S)$ photoproduction cross section are measured, over the rapidity range $\vert y \vert < 2.2$, as a function of the photon-proton center-of-mass energy, $W_{\gamma p}$, which provides valuable information of the gluon distribution at small values of parton fractional momenta $x$. The slope of the squared transverse momentum ($p_{T}^2$) dependent differential cross section is measured to determine the size of the production region. [...] CMS-CR-2018-411.- Geneva : CERN, 2018 - 6 p. Fulltext: PDF; In : Hard Probes 2018: International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, Aix-les-bains, France, 1 - 5 Oct 2018

2019-01-18
08:14
 Measurement of the single top quark and antiquark production cross sections in the $t$ channel and their ratio at 13 TeV / Mueller, Denise The electroweak production in the $t$ channel is the most dominant production mode of single top quarks at the LHC. [...] arXiv:1901.05247 ; CMS-CR-2018/262. - Fulltext