CERN Accelerating science

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2020-10-21
06:07
Design and Characterization of the CLICTD Pixelated Monolithic Sensor Chip / Kremastiotis, I (CERN) ; Ballabriga, R (CERN) ; Campbell, M (CERN) ; Dannheim, D (CERN) ; Dort, K (CERN ; Giessen U.) ; Egidos, N (CERN ; Barcelona, Autonoma U.) ; Kröger, J (CERN ; U. Heidelberg (main)) ; Linssen, L (CERN) ; Llopart, X (CERN) ; Munker, M (CERN) et al.
A novel monolithic pixelated sensor and readout chip, the compact linear collider tracker detector (CLICTD) chip, is presented. The CLICTD chip was designed targeting the requirements of the silicon tracker development for the experiment at the compact linear collider (CLIC) and has been fabricated in a modified 180 nm CMOS imaging process with charge collection on a high-resistivity p-type epitaxial layer. [...]
2020 - 10 p. - Published in : IEEE Trans. Nucl. Sci. 67 (2020) 2263-2272 Fulltext: PDF;

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2020-10-21
06:07
Triple-GEM discharge probability studies at CHARM: simulations and experimental results / CMS Muon Group Collaboration
The CMS muon system in the region with 2.03<|η|<2.82 is characterized by a very harsh radiation environment which can generate hit rates up to 144 kHz/cm2 and an integrated charge of 8 C/cm2 over ten years of operation. In order to increase the detector performance and acceptance for physics events including muons, a new muon station (ME0) has been proposed for installation in that region. [...]
2020 - 23 p. - Published in : JINST 15 (2020) P10013 Fulltext: PDF;

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2020-10-21
06:07
Study of the Standard Model Higgs Boson in the ATLAS and CMS Experiments at the LHC / Tsukerman, I I (Moscow, ITEP)
Recent results on Higgs boson production and decays in the ATLAS and CMS experiments at the LHC are reviewed. These results are based on data accumulated from 2015 to 2018 in studying proton–proton collisions at the c.m. [...]
2020 - 9 p. - Published in : Phys. At. Nucl. 83 (2020) 219-227
- Published in : Yad. Fiz.: 83 (2020) , no. 2, pp. 132-139

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2020-10-21
06:07
Quarkonium production in pp and p-A collisions with ALICE at the LHC / Morreale, Astrid (SUBATECH, Nantes) /ALICE Collaboration
Quarkonia are mesons formed of either a charm and anti-charm quark pair (J/ψ, ψ(2S)) or a beauty and anti-beauty quark pair (ϒ(1S), (2S) and (3S)). We report on forward rapidity (2:5 < y < 4) J/ψ and ψ(2S) production measured in pp collisions at √s = 13 TeV, using data collected at the LHC in 2015. [...]
2018 - 4 p. - Published in : EPJ Web Conf. 171 (2018) 19002
In : 17th International Conference on Strangeness in Quark Matter, Utrecht, The Netherlands, 10 - 15 Jul 2017, pp.19002

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2020-10-20
06:01
What is your favourite particle and why? / Wiener, J (CERN) ; Woithe, J (CERN)
We have conducted a large-scale international study with high-school teachers (N=530) and high-school students (N=959) from all around the world to investigate and document what they consider as their favourite particles. We found five particles to be highly prominent in both groups, namely the Higgs boson, the neutrino, the electron, the photon and the gluon [...]
2020 - 6 p. - Published in : J. Phys. : Conf. Ser. 1512 (2020) 012021
In : International Conference on Physics Education (ICPE), Johannesburg, South Africa, 1 -5 Oct 2018, pp.012021

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2020-10-20
06:01
Measurement of heavy-flavour production, correlations and jets with ALICE / Sakai, Shingo (Tsukuba U., GSPAS) /ALICE Collaboration
In this article, recent ALICE measurements of the RAA and v2 of electrons at mid-rapidity (|y|<0.6) and muons at forward rapidity (2.5<y<4), from semi-leptonic decays of heavy-flavour hadrons in Pb–Pb collisions at = 5.02 TeV are shown. The results of D-tagged jet production cross-section in pp collisions at $\sqrt{s_{NN}}$ =7 TeV are presented. [...]
2018 - 4 p. - Published in : EPJ Web Conf. 171 (2018) 18008
In : 17th International Conference on Strangeness in Quark Matter, Utrecht, The Netherlands, 10 - 15 Jul 2017, pp.18008

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2020-10-17
04:07
Luminosity Performance of the Compact Linear Collider at 380 GeV with Static and Dynamic Imperfections / Gohil, C. (JAI, UK ; CERN) ; Burrows, P.N. (JAI, UK) ; Blaskovic Kraljevic, N. (CERN) ; Latina, A. (CERN) ; Ögren, J. (CERN) ; Schulte, D. (CERN)
The Compact Linear Collider is one of the two main European options for a collider in a post Large Hadron Collider era. This is a linear $e^+e^-$ collider with three centre-of-mass energy stages: 380 GeV, 1.5 TeV and 3 TeV. [...]
arXiv:2009.01184.- 2020-10-16 - 13 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 101001 Fulltext: PDF;

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2020-10-17
04:07
Photoproduction of axionlike particles in the NA64 experiment / Dusaev, R.R. (Tomsk State U.) ; Kirpichnikov, D.V. (Moscow, INR) ; Kirsanov, M.M. (Moscow, INR)
Axion-like particles $a$ (ALPs) that couple to the Standard Model (SM) gauge fields could be observed in the high-energy photon scattering $\gamma N\to N a$ off nuclei followed by the $a\to \gamma\gamma$ decay. In the present paper we describe the calculation of the ALP production cross-section and the properties of this production. [...]
arXiv:2004.04469.- 2020-09-29 - 8 p. - Published in : Phys. Rev. D 102 (2020) 055018 Article from SCOAP3: PDF; Fulltext: PDF;

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2020-10-14
04:07
Radiation campaign of HPK prototype LGAD sensors for the High-Granularity Timing Detector (HGTD)Radiation Campaign of HPK Prototype LGAD sensors for the High-Granularity Timing Detector (HGTD) / Shi, X. (Beijing, Inst. High Energy Phys.) ; Ayoub, M.K. (Beijing, Inst. High Energy Phys.) ; da Costa, J. Barreiro Guimarães (Beijing, Inst. High Energy Phys.) ; Cui, H. (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Kiuchi, R. (Beijing, Inst. High Energy Phys.) ; Fan, Y. (Beijing, Inst. High Energy Phys.) ; Han, S. (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Huang, Y. (Beijing, Inst. High Energy Phys.) ; Jing, M. (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Liang, Z. (Beijing, Inst. High Energy Phys.) et al.
We report on the results of a radiation campaign with neutrons and protons of Low Gain Avalanche Detectors (LGAD) produced by Hamamatsu (HPK) as prototypes for the High-Granularity Timing Detector (HGTD) in ATLAS. Sensors with an active thickness of 50~$\mu$m were irradiated in steps of roughly 2$\times$ up to a fluence of $3\times10^{15}~\mathrm{n_{eq}cm^{-2}}$. [...]
arXiv:2004.13895.- 2020-11-01 - 15 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 979 (2020) 164382 Fulltext: PDF;
In : 12th international "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors, Hiroshima, Japan, 14 - 18 Dec 2019, pp.164382

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2020-10-14
04:07
Two low-power optical data transmission ASICs for the ATLAS Liquid Argon Calorimeter readout upgrade / Xiao, Le (Hua-Zhong Normal U., LQLP ; Southern Methodist U.) ; Zhou, Wei (Hua-Zhong Normal U., LQLP ; Southern Methodist U.) ; Sun, Quan (Southern Methodist U.) ; Deng, Binwei (Hubei Norm. U.) ; Gong, Datao (Southern Methodist U.) ; Guo, Di (Hua-Zhong Normal U., LQLP ; Southern Methodist U.) ; He, Huiqin (SZPT, Shenzhen) ; Hou, Suen (Taiwan, Inst. Phys.) ; Liu, Chonghan (Southern Methodist U.) ; Liu, Tiankuan (Southern Methodist U.) et al.
A serializer ASIC and a VCSEL driver ASIC are needed for the front-end optical data transmission in the ATLAS liquid argon calorimeter readout phase-I upgrade. The baseline ASICs are the serializer LOCx2 and the VCSEL driver LOCld, designed in a 0.25-{\mu}m Silicon-on-Sapphire (SoS) CMOS technology and consumed 843 mW and 320 mW, respectively. [...]
arXiv:2009.06148.- 2019-04-21 - 12 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 924 (2019) 160-165 Fulltext: PDF;
In : 11th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors (HSTD11) in conjunction with 2nd Workshop on SOI Pixel Detectors (SOIPIX2017) at OIST, Okinawa, Japan, Okinawa, Japan, 10 - 15 Dec 2017, pp.160-165

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