CERN Accelerating science

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1.
Quality control of mass-produced GEM detectors for the CMS GE1/1 muon upgrade / Abbas, M. (KIT, Karlsruhe) ; Abbrescia, M. (Bari Polytechnic ; INFN, Bari) ; Abdalla, H. (Ain Shams U., Cairo ; American U., Cairo) ; Abdelalim, A. (Ain Shams U., Cairo ; British U. in Egypt) ; AbuZeid, S. (Ain Shams U., Cairo) ; Agapitos, A. (Peking U.) ; Ahmad, A. (NCP, Islamabad) ; Ahmed, A. (Delhi Tech. U.) ; Ahmed, W. (NCP, Islamabad) ; Aimè, C. (Pavia U. ; INFN, Pavia) et al.
The series of upgrades to the Large Hadron Collider, culminating in the High Luminosity Large Hadron Collider, will enable a significant expansion of the physics program of the CMS experiment. However, the accelerator upgrades will also make the experimental conditions more challenging, with implications for detector operations, triggering, and data analysis. [...]
arXiv:2203.12037.- 2022-07-01 - 45 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1034 (2022) 166716 Fulltext: PDF;
2.
Performance of a triple-GEM demonstrator in pp collisions at the CMS detector / Abbas, M. (KIT, Karlsruhe) ; Abbrescia, M. (Bari U. ; INFN, Bari) ; Abdalla, H. (Ain Shams U., Cairo ; American U., Cairo) ; Abdelalim, A. (Ain Shams U., Cairo ; Zewail City Sci. Technol., Giza) ; AbuZeid, S. (Ain Shams U., Cairo) ; Agapitos, A. (Peking U.) ; Ahmad, A. (NCP, Islamabad) ; Ahmed, A. (Delhi U.) ; Ahmed, W. (NCP, Islamabad) ; Aimè, C. (INFN, Pavia) et al.
After the Phase-2 high-luminosity upgrade to the Large Hadron Collider (LHC), the collision rate and therefore the background rate will significantly increase, particularly in the high $\eta$ region. To improve both the tracking and triggering of muons, the Compact Muon Solenoid (CMS) Collaboration plans to install triple-layer Gas Electron Multiplier (GEM) detectors in the CMS muon endcaps. [...]
arXiv:2107.09364.- 2021-11-12 - 10 p. - Published in : JINST 16 (2021) P11014 Fulltext: 2107.09364 - PDF; document - PDF;
3.
Production and validation of industrially produced large-sized GEM foils for the Phase-2 upgrade of the CMS muon spectrometer / CMS Muon Collaboration
The upgrade of the CMS detector for the high luminosity LHC (HL-LHC) will include gas electron multiplier (GEM) detectors in the end-cap muon spectrometer. Due to the limited supply of large area GEM detectors, the Korean CMS (KCMS) collaboration had formed a consortium with Mecaro Co., Ltd. [...]
arXiv:2309.16330.- 2023-09-27 - 9 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1057 (2023) 168723 Fulltext: PDF;
4.
Layout and Assembly Technique of the GEM Chambers for the Upgrade of the CMS First Muon Endcap Station / CMS Muon Collaboration
Triple-GEM detector technology was recently selected by CMS for a part of the upgrade of its forward muon detector system as GEM detectors provide a stable operation in the high radiation environment expected during the future High-Luminosity phase of the Large Hadron Collider (HL-LHC). In a first step, GEM chambers (detectors) will be installed in the innermost muon endcap station in the $1.6<\left|\eta\right|<2.2$ pseudo-rapidity region, mainly to control level-1 muon trigger rates after the second LHC Long Shutdown. [...]
arXiv:1812.00411.- 2018-11-28 - 9 p. - Published in : Nucl. Instrum. Meth. A 918 (2019) 67-75 Fulltext: PDF; Fulltext from Publisher: PDF;
5.
Performance of prototype GE1 ∕ 1 chambers for the CMS muon spectrometer upgrade / CMS Muon Collaboration
The high-luminosity phase of the Large Hadron Collider (HL-LHC) will result in ten times higher particle background than measured during the first phase of LHC operation. In order to fully exploit the highly-demanding operating conditions during HL-LHC, the Compact Muon Solenoid (CMS) Collaboration will use Gas Electron Multiplier (GEM) detector technology. [...]
arXiv:1903.02186.- 2020-08-21 - 23 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 972 (2020) 164104 Fulltext: PDF;
6.
Benchmarking LHC background particle simulation with the CMS triple-GEM detector / CMS Collaboration
An estimate of environmental background hit rate on triple-GEM chambers is performed using Monte Carlo (MC) simulation and compared to data taken by test chambers installed in the CMS experiment (GE1/1) during Run-2 at the Large Hadron Collider (LHC). The hit rate is measured using data collected with proton-proton collisions at 13 TeV and a luminosity of 1.5$\times10^{34}$ cm$^{-2}$ s$^{-1}$. [...]
arXiv:2107.03621.- 2021-12-16 - 19 p. - Published in : JINST 16 (2021) P12026 Fulltext: 2107.03621 - PDF; document - PDF;
7.
Interstrip Capacitances of the Readout Board used in Large Triple-GEM Detectors for the CMS Muon Upgrade / CMS Muon Group Collaboration
We present analytical calculations, Finite Element Analysis modeling, and physical measurements of the interstrip capacitances for different potential strip geometries and dimensions of the readout boards for the GE2/1 triple-Gas Electron Multiplier detector in the CMS muon system upgrade. The main goal of the study is to find configurations that minimize the interstrip capacitances and consequently maximize the signal-to-noise ratio for the detector. [...]
arXiv:2009.09505.- 2020-12-14 - 21 p. - Published in : JINST 15 (2020) P12019 Fulltext: PDF; Fulltext from publisher: PDF;
8.
Performance of a Large-Area GEM Detector Prototype for the Upgrade of the CMS Muon Endcap System / Abbaneo, D. (CERN) ; Abbas, M. (CERN) ; Abbrescia, M. (Bari U. ; INFN, Bari) ; Abdelalim, A.A. (Helwan U.) ; Abi Akl, M. (Texas A&M U. Qatar, Doha) ; Ahmed, W. (Helwan U.) ; Ahmed, W. (Quaid-i-Azam U.) ; Altieri, P. (Bari U. ; INFN, Bari) ; Aly, R. (Helwan U.) ; Asawatangtrakuldee, C. (Peking U.) et al.
Gas Electron Multiplier (GEM) technology is being considered for the forward muon upgrade of the CMS experiment in Phase 2 of the CERN LHC. Its first implementation is planned for the GE1/1 system in the $1.5 < \mid\eta\mid < 2.2$ region of the muon endcap mainly to control muon level-1 trigger rates after the second long LHC shutdown. [...]
arXiv:1412.0228.- 2016-03-14 - 8 p. - Published in : 10.1109/NSSMIC.2014.7431249 Fulltext: PDF; External link: Preprint
In : Conference Information and Promotion Committee (CIP) for the IEEE – Nuclear Science Symposium and Medical Imaging Conference, and Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors workshop, Seattle, WA, USA, 8 - 15 Nov 2014, pp.7431249
9.
Upgrade of the CMS Resistive Plate Chambers for the High Luminosity LHC / CMS Collaboration
During the upcoming High Luminosity phase of the Large Hadron Collider (HL-LHC), the integrated luminosity of the accelerator will increase to 3000 fb$^{-1}$. The expected experimental conditions in that period in terms of background rates, event pileup, and the probable aging of the current detectors present a challenge for all the existing experiments at the LHC, including the Compact Muon Solenoid (CMS) experiment. [...]
arXiv:2109.14331.- 2022-01-05 - 10 p. - Published in : JINST 17 (2022) C01011 Fulltext: PDF;
In : 22nd International Workshop on Radiation Imaging Detectors, Online, 27 Jun - 1 Jul 2021, pp.C01011
10.
Search for new physics in the $ \tau $ lepton plus missing transverse momentum final state in proton-proton collisions at $ \sqrt{s} = $ 13 TeV / CMS Collaboration
A search for physics beyond the standard model (SM) in the final state with a hadronically decaying tau lepton and a neutrino is presented. This analysis is based on data recorded by the CMS experiment from proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC, corresponding to a total integrated luminosity of 138 fb$ ^{-1} $. [...]
arXiv:2212.12604; CMS-EXO-21-009; CERN-EP-2022-268; CMS-EXO-21-009-003.- Geneva : CERN, 2023-09-08 - 29 p. - Published in : JHEP 2309 (2023) 051 Fulltext: 2212.12604 - PDF; cab833f2b3ca575cbbd5884765500a7b - PDF; CMS-EXO-21-009-arXiv - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server

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