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2024-03-04
18:47
Search for a standard model-like Higgs boson in the mass range between 70 and 110$~\mathrm{GeV}$ in the diphoton final state in proton-proton collisions at $\sqrt{s}=13~\mathrm{TeV}$ / Tao, Junquan (Beijing, Inst. High Energy Phys.) /CMS Collaboration
The results of a search for a standard model-like Higgs boson decaying into two photons in the mass range between 70 and 110$~\mathrm{GeV}$ are presented.The analysis uses the data set collected with the CMS experiment in proton-proton collisions corresponding to, respectively, $36.3~\mathrm{fb}^{-1}$, $41.5~\mathrm{fb}^{-1}$ and $54.4~\mathrm{fb}^{-1}$, during the 2016, 2017 and 2018 LHC running periods, at $\sqrt{s}=13~\mathrm{TeV}$. The expected and observed $95\pct$ confidence level upper limits on the product of the cross section and branching fraction of an additional Higgs boson, with respect the one with around 125$~\mathrm{GeV}$ mass, decaying into two photons are presented. [...]
CMS-CR-2024-047.- Geneva : CERN, 2024 - 2 p. Fulltext: PDF;
In : 9th China LHC Physics Workshop, Shanghai, China, 15 - 20 Nov 203

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2024-03-04
16:54
Performance of new CO2 based mixture in CMS Improved Resistive Plate Chambers in HL-LHC environment / Gomes Pinheiro, Joao Pedro (Rio de Janeiro State U.) ; Shah, Mehar Ali (Iberoamericana U.) ; Eiriz Sanchez, Lucia (Dundee U.) /CMS Collaboration
Resistive Plate Chamber (RPCs) detectors in the Compact Muon Solenoid (CMS) experiment operate with a gas mixture comprised of 95.2pct of C2H2F4, that provides a high number of ion-electron pairs, 4.5pct of iC4H10, that ensures the suppression of photon-feedback effects and 0.3pct of SF6, used as an electron quencher to further operate the detector in streamer-free mode. C2H2F4 is known to be a Greenhouse gas with a global warming potential (GWP) of 1430. [...]
CMS-CR-2024-046.- Geneva : CERN, 2024 - 6 p. Fulltext: PDF;
In : The 3rd International Conference on Detector Stability and Aging Phenomena in Gaseous Detectors

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2024-03-04
16:54
Studies of eco-friendly gas mixtures for RPC detectors / Dalia Lucero, Ramirez Guadarrama (Iberoamericana U.) ; Ramos Lopez, Dayron (INFN, Bari) /CMS Collaboration
In the context of climate change, one of the main contributors to global warming is the greenhouse effect. Regulations have been implemented in different areas of society to reduce or ban the use of greenhouse gases, such as freon. [...]
CMS-CR-2024-044.- Geneva : CERN, 2024 - 5 p. Fulltext: PDF;
In : The 3rd International Conference on Detector Stability and Aging Phenomena in Gaseous Detectors

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2024-03-04
16:53
Study of discharges observed in the CMS GE1/1 station during LHC Run-3 / Calzaferri, Simone (INFN, Pavia) /CMS Collaboration
Since July 2022, GE1/1, the first station using Gas Electron Multiplier (GEM) technology in the Compact Muon Solenoid (CMS) experiment, has been participating in the data-taking in proton-proton (p-p) collisions. This station is the first of three (GE1/1, GE2/1 and ME0) planned to be installed in CMS, to cope with the challenging conditions given by the upgrade of luminosity of the Large Hadron Collider (High-Luminosity LHC program, or HL-LHC) [3]. [...]
CMS-CR-2024-050.- Geneva : CERN, 2024 - 6 p. Fulltext: PDF;
In : The 3rd International Conference on Detector Stability and Aging Phenomena in Gaseous Detectors

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2024-03-04
16:53
Longevity studies for the CMS Drift Tubes towards HL-LHC / Gonzalez Caballero, Isidro (Oviedo U.)
The High Luminosity LHC (HL-LHC) program will pose a great challenge for the CMS Muon System. Existing subdetectors, which consist of Drift Tubes (DT), Resistive Plate Chambers (RPC) and Cathode Strip Chambers (CSC), will have to operate at 5 times larger instantaneous luminosity than the designed for, and, consequently, will have to sustain about 10 times the original LHC integrated luminosity. [...]
CMS-CR-2024-048.- Geneva : CERN, 2024 - 6 p. Fulltext: PDF;
In : The 3rd International Conference on Detector Stability and Aging Phenomena in Gaseous Detectors

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2024-03-04
16:53
Longevity study of a triple-GEM chamber for the HL-LHC upgrade / Hoepfner, Kerstin (Aachen, Tech. Hochsch.) /CMS Collaboration
As part of the high-luminosity LHC (HL-LHC) upgrade, the CMS muon spectrometer will extend its coverage in the very forward region with triple-GEM detectors. These detectors will cope with a harsh environment with expected background fluxes up to 150 kHz/cm$^2$. [...]
CMS-CR-2024-042.- Geneva : CERN, 2024 - 6 p. Fulltext: PDF;
In : The 3rd International Conference on Detector Stability and Aging Phenomena in Gaseous Detectors

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2024-03-04
16:53
CMS CSC longevity studies at GIF++ setup / Perelygin, Victor (Dubna, JINR) /CMS Collaboration
\begin{abstract} %% Text of abstract The investigation into the longevity of gaseous detectors holds paramount importance, particularly in anticipation of the forthcoming upgrade of the Large Hadron Collider (LHC) to the High-Luminosity LHC (HL-LHC) and the planned alterations to the CMS forward endcap zone. Aging effects are meticulously examined at the Gamma Irradiation Facility (GIF++) at CERN, focusing on two crucial components: the ME1/1 and ME2/1 cathode strip chambers (CSC) within the CMS [...]
CMS-CR-2024-038.- Geneva : CERN, 2024 - 7 p. Fulltext: PDF;
In : The 3rd International Conference on Detector Stability and Aging Phenomena in Gaseous Detectors

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2024-03-04
12:28
Search for new physics with emerging jets in proton-proton collisions at $ \sqrt{s} = $ 13 TeV
A search for ``emerging jets'' produced in proton-proton collisions at a center-of-mass energy of 13 TeV is performed using data collected by the CMS experiment corresponding to an integrated luminosity of 138 fb$ ^{-1} $. [...]
CERN-EP-2024-049 ; CMS-EXO-22-015-003.
- 2024.
Additional information for the analysis - CMS AuthorList - Fulltext

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2024-03-04
11:19
A new measurement of the cross section for "$\pi^{-}p \rightarrow$ all neutral" from 0.7 to 1.6 GeV/c. / Bizard, G ; Déclais, Y ; Duchon, J ; Laville, J.L ; Séguinot, J ; Bricman, C ; Perreau, J.M ; Valladas, C
CERN-PRE-11420a.
- 1970. - 8 p.

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2024-03-04
11:07
Likelihood handling of scattering data with previuos experimental information. / Bystricky, J ; Lehar, F
CERN-PRE- 11430.
- 1970. - 22 p.

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