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CMS Preprints

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2025-04-07
14:30
Upgrade of the CMS Electromagnetic Calorimeter for the High-Luminosity LHC / Lavizzari, Giulia (INFN, Milan Bicocca ; Milan Bicocca U.)
The High Luminosity upgrade of the LHC (HL-LHC) at CERN will provide unprecedented instantaneous and integrated luminosities of around 5 x 1034 cm−2 s−1 and 3000/fb, respectively. The expected average of 140 to 200 collisions per bunch-crossing represents a severe challenge for the detectors. [...]
CMS-CR-2025-099.- Geneva : CERN, 2025 - 8 p. Fulltext: PDF;
In : 13th International Conference on New Frontiers in Physics 2024 (ICNFP 2024), Kolymbari, Greece, 26 Aug - 4 Sep 2024

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2025-04-07
14:30
First observation of the η→4μ decay with the CMS detector / Rossin, Roberto (INFN, Padua ; Padua U.) /CMS Collaboration
The first observation of the rare η→μ+μ−μ+μ− double-Dalitz decay is presented. The analysis is based on data collected by the CMS experiment at the CERN LHC operating at the centre-of-mass energy of √s=13TeV. [...]
CMS-CR-2025-092.- Geneva : CERN, 2025 - 9 p. Fulltext: PDF;
In : Multiplicity-dependent heavy flavour production at the LHCb experiment

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2025-04-03
22:18
Combined effective field theory interpretation of Higgs boson, electroweak vector boson, top quark, and multijet measurements / CMS Collaboration
Constraints on Wilson coefficients (WCs) corresponding to dimension-6 operators of the standard model effective field theory (SMEFT) are determined from a simultaneous fit to seven sets of CMS measurements probing Higgs boson, electroweak vector boson, top quark, and multijet production. [...]
arXiv:2504.02958 ; CMS-SMP-24-003 ; CERN-EP-2025-035 ; CMS-SMP-24-003-003. - 2025 - 67 p, 67.
Additional information for the analysis - CMS AuthorList - Fulltext - Fulltext

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2025-04-03
13:30
Search for rare muonic B decays at CMS / Szlezak, Klara Emilia (Warsaw U.) /CMS Collaboration
In this paper, we present the search for three highly suppressed Standard Model processes at the CMS experiment: B0→μ+μ−, B0s→μ+μ−, and B0s→μ+μ−γ. The latest and most precise results to date are presented for the first two decays, while the feasibility and experimental strategy for the third, yet unobserved at CMS, are discussed. [...]
CMS-CR-2025-098.- Geneva : CERN, 2025 - 7 p. Fulltext: PDF;
In : 31st Cracow Epiphany Conference on the recent LHC results (Epiphany 2025), Cracow, Poland, 13 - 17 Jan 2025

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2025-04-03
13:30
CMS searches for new physics in the Higgs sector / Szleper, Michal (NCBJ, Swierk) /CMS Collaboration
A summary is presented of CMS searches for new neutral resonances, with main focus on scalars and pseudoscalars, based on data collected during Run 2 of the LHC. Special emphasis is given to the most recent results..
CMS-CR-2025-085.- Geneva : CERN, 2025 - 11 p. Fulltext: PDF;
In : 31st Cracow Epiphany Conference on the recent LHC results (Epiphany 2025), Cracow, Poland, 13 - 17 Jan 2025

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2025-04-03
04:22
Reinterpretation and preservation of data and analyses in HEP / LHC Reinterpretation Forum Collaboration
Data from particle physics experiments are unique and are often the result of a very large investment of resources. [...]
arXiv:2504.00256 ; CERN-LPCC-2025-002. - 9.
Fulltext

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2025-04-03
04:16
Highlights of the HL-LHC physics projections by ATLAS and CMS
The ATLAS and CMS experiments are unique drivers of our fundamental understanding of nature at the energy frontier. [...]
ATL-PHYS-PUB-2025-018 CMS-HIG-25-002 ; arXiv:2504.00672. -
Fulltext

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2025-03-31
13:31
Recent Experience with the CMS Data Management System / Ozturk, Hasan (CERN) ; Paparrigopoulos, Panos (CERN) ; Manrique Ardila, Andres (Wisconsin U., Madison) ; Chauhan, Rahul (Wisconsin U., Madison) ; Ellis, Katy (Rutherford) ; Emmanouil, Christos (CERN) ; Kovalskyi, Dmytro (MIT) ; Vaandering, Eric Wayne (Fermilab) ; Voetberg, Margaret Grace (Fermilab) ; Wightman, Andrew Steven (Nebraska U.) /CMS Collaboration
The CMS experiment manages a large-scale data infrastructure, currently handling over 200 PB of disk and 500 PB of tape storage and transferring more than 1 PB of data per day on average between various WLCG sites. Utilizing Rucio for high-level data management, FTS for data transfers, and a variety of storage and network technologies at the sites, CMS confronts inevitable challenges due to the system's growing scale and evolving nature. [...]
CMS-CR-2025-055.- Geneva : CERN, 2025 - 9 p. Fulltext: PDF;
In : 27th International Conference on Computing in High Energy & Nuclear Physics, Kraków, Poland, 19 - 25 Oct 2024

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2025-03-28
14:57
Observation of a pseudoscalar excess at the top quark pair production threshold / CMS Collaboration
A search for resonances in top quark pair (t¯t) production in final states with two charged leptons and multiple jets is presented, based on proton-proton collision data collected by the CMS experiment at the CERN LHC at √s= 13 TeV, corresponding to 138 fb−1. [...]
arXiv:2503.22382 ; CMS-TOP-24-007 ; CERN-EP-2025-061 ; CMS-TOP-24-007-003. - 2025 - 43.
Additional information for the analysis - CMS AuthorList - Fulltext - Fulltext

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2025-03-28
06:14
Observation of WZγ production and constraints on new physics scenarios in proton-proton collisions at √s= 13 TeV / CMS Collaboration
A measurement of the WZγ triboson production cross section is presented. [...]
arXiv:2503.21977 ; CMS-SMP-22-018 ; CERN-EP-2025-020 ; CMS-SMP-22-018-003. - 2025 - 39.
Additional information for the analysis - CMS AuthorList - Fulltext - Fulltext

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