CERN Accelerating science

CERN Document Server 1,162 record trovati  1 - 10successivofine  salta al record: La ricerca ha impiegato 0.64 secondi. 
1.
Impact of magnetic field on the stability of the CMS GE1/1 GEM detector operation / Abbas, M (KIT, Karlsruhe) ; Abbott, S (UC, Davis) ; Abbrescia, M (Bari U. ; INFN, Bari) ; Abdalla, H (Alexandria U. ; American U., Cairo) ; Abdelalim, A (Alexandria U. ; Zewail City Sci. Technol., Giza) ; AbuZeid, S (Ain Shams U., Cairo ; INFN, Pavia) ; Aebi, D (Texas A-M) ; Agapitos, A (Peking U.) ; Ahmad, A (NCP, Islamabad) ; Ahmed, A (Delhi Tech. U.) et al.
The Gas Electron Multiplier (GEM) detectors of the GE1/1 station of the CMS experiment have been operated in the CMS magnetic field for the first time on the 7$^{th}$ of October 2021. During the magnetic field ramps, several discharge phenomena were observed, leading to instability in the GEM High Voltage (HV) power system. [...]
2023 - 24 p. - Published in : JINST 18 (2023) P11029 Fulltext: PDF;
2.
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;
3.
Production and validation of industrially produced large-sized GEM foils for the Phase-2 upgrade of the CMS muon spectrometer / Abbas, Syed Mohsin (IPM, Tehran) ; Abbrescia, Marcello (INFN, Bari ; Bari U.) ; Abdalla, Hassan Fathy (Cairo, Acad. Sci. Res. Tech.) ; Abdelalim, Ahmed Ali (Cairo, Acad. Sci. Res. Tech.) ; Abuzeid Hassan, Shimaa Abdelwahed (INFN, Pavia) ; Aebi, Devin Michael (Texas A-M) ; Agapitos, Antonis (Peking U.) ; Ahmad, Ashfaq (Quaid-i-Azam U.) ; Ahmed, Asar (Delhi U.) ; Ahmed, Waqar (Quaid-i-Azam U.) et al.
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. to serve as a supplier of GEM foils with area of approximately 0.6 m$^{2}$. The consortium has developed a double-mask etching technique for production of these large-sized GEM foils. This article describes the production, quality control, and quality assessment (QA/QC) procedures and the mass production status for the GEM foils. [...]
CMS-NOTE-2023-006; CERN-CMS-NOTE-2023-006.- Geneva : CERN, 2023 - 18 p. Fulltext: PDF;
4.
The ATLAS experiment at the CERN Large Hadron Collider: a description of the detector configuration for Run 3 / ATLAS Collaboration
The ATLAS detector is installed in its experimental cavern at Point 1 of the CERN Large Hadron Collider. During Run 2 of the LHC, a luminosity of $\mathcal{L}=2\times 10^{34}\mathrm{cm}^{-2}\mathrm{s}^{-1}$ was routinely achieved at the start of fills, twice the design luminosity. [...]
arXiv:2305.16623; CERN-EP-2022-259.- Geneva : CERN, 2024-05-23 - 233 p. - Published in : JINST 19 (2024) P05063 Fulltext: 2305.16623 - PDF; document - PDF; External link: Previous draft version
In : The Large Hadron Collider and The Experiments for Run 3
5.
First measurement of the forward rapidity gap distribution in pPb collisions at $ \sqrt{\smash[b]{s_{_{\mathrm{NN}}}}} = $ 8.16 TeV / CMS Collaboration
For the first time at LHC energies, the forward rapidity gap spectra from proton-lead collisions for both proton and lead dissociation processes are presented. The analysis is performed over 10.4 units of pseudorapidity at a center-of-mass energy per nucleon pair of $ \sqrt{\smash[b]{s_{_{\mathrm{NN}}}}} = $ 8.16 TeV, almost 300 times higher than in previous measurements of diffractive production in proton-nucleus collisions. [...]
arXiv:2301.07630; CMS-HIN-18-019; CERN-EP-2022-164; CMS-HIN-18-019-003.- Geneva : CERN, 2023-11-01 - 25 p. - Published in : Phys. Rev. D 108 (2023) 092004 Fulltext: CMS-HIN-18-019-arXiv - PDF; 2301.07630 - PDF; Fulltext from Publisher: PDF; External links: Additional information for the analysis; CMS AuthorList
6.
Measurements of jet multiplicity and jet transverse momentum in multijet events in proton-proton collisions at $ \sqrt{s}= $ 13 TeV / CMS Collaboration
Multijet events at large transverse momentum ($ p_{\mathrm{T}} $) are measured at $ \sqrt{s}= $ 13 TeV using data recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 36.3 fb$^{-1}$. The multiplicity of jets with $ p_{\mathrm{T}} > $ 50 GeV that are produced in association with a high-$ p_{\mathrm{T}} $ dijet system is measured in various ranges of the $ p_{\mathrm{T}} $ of the jet with the highest transverse momentum and as a function of the azimuthal angle difference $ \Delta\phi_{1,2} $ between the two highest $ p_{\mathrm{T}} $ jets in the dijet system. [...]
arXiv:2210.13557; CMS-SMP-21-006; CERN-EP-2022-144; CMS-SMP-21-006-003.- Geneva : CERN, 2023-08-22 - 25 p. - Published in : Eur. Phys. J. C 83 (2023) 742 Fulltext: 2210.13557 - PDF; 803f4ed4711aa3d9018f9864b52cb6b8 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
7.
Precision measurement of the Z boson invisible width in pp collisions at $\sqrt{s}$ = 13 TeV / CMS Collaboration
A precise measurement of the invisible width of the Z boson produced in proton-proton collisions at a center-of-mass energy of 13 TeV is presented using data recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 36.3 fb$^{-1}$. The result is obtained from a simultaneous fit to kinematic distributions for two data samples of Z boson plus jets: one dominated by Z boson decays to invisible particles and the other by Z boson decays to muon and electron pairs. [...]
arXiv:2206.07110; CMS-SMP-18-014; CERN-EP-2022-088; CMS-SMP-18-014-003.- 2023-05-22 - 14 p. - Published in : Phys. Lett. B 842 (2023) 137563 Fulltext: 2206.07110 - PDF; d8ee8d323b9ab80b63f3837ca02ace0c - PDF; CMS-SMP-18-014-arXiv - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
8.
Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at $\sqrt{s}= 7$ and 8 TeV / ATLAS Collaboration
A combination of measurements of the inclusive top-quark pair production cross-section performed by ATLAS and CMS in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV at the LHC is presented. The cross-sections are obtained using top-quark pair decays with an opposite-charge electron-muon pair in the final state and with data corresponding to an integrated luminosity of about 5 fb$^{-1}$ at $\sqrt{s}=7$ TeV and about 20 fb$^{-1}$ at $\sqrt{s}=8$ TeV for each experiment. [...]
arXiv:2205.13830; CERN-EP-2021-222; CMS-TOP-18-014; CERN-LPCC-2022-03.- 2023-07-27 - 59 p. - Published in : JHEP 2307 (2023) 213 Fulltext: PDF; Fulltext from Publisher: PDF; External link: Previous draft version
9.
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;
10.
Search for CP violating top quark couplings in pp collisions at $ \sqrt{s} $ = 13 TeV / CMS Collaboration
Results are presented from a search for CP violation in top quark pair production, using proton-proton collisions at a center-of-mass energy of 13 TeV. The data used for this analysis consist of final states with two charged leptons collected by the CMS experiment, and correspond to an integrated luminosity of 35.9 fb$^{-1}$. [...]
arXiv:2205.07434; CMS-TOP-18-007; CERN-EP-2021-143; CMS-TOP-18-007-003.- Geneva : CERN, 2023-07-04 - 45 p. - Published in : JHEP 2307 (2023) 023 Fulltext: CMS-TOP-18-007-arXIv - PDF; 2205.07434 - PDF; Fulltext from Publisher: PDF; External links: Additional information for the analysis; CMS AuthorList

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