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CMS Conference Reports

新增:
2024-12-02
17:24
Searches for new physics in rare decays of heavy flavors at CMS / Polikarpov, Sergey (Dubna, JINR) /CMS Collaboration
As direct searches for beyond the Standard model physics at the LHC have not been successful, more and more attention is drawn to the indirect searches. In particular, rare decays of beauty and charm hadrons present a sensitive laboratory for BSM physics and new particles, since they can contribute in loop diagrams, even if their mass is much heavier than that of the final-state particles. [...]
CMS-CR-2024-316.- Geneva : CERN, 2024 - 13 p. Fulltext: PDF;

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2024-12-02
13:30
Recent measurements of top cross sections at CMS / Javier Del Riego Badas /CMS Collaboration
This contribution presents recent cross section measurements for top quark pair production ($\mathrm{t\bar{t}}$) and single top quark production in association with a W boson ($\mathrm{tW}$) in proton-proton collisions at the CMS experiment at LHC. For $\mathrm{t\bar{t}}$ production, data from 2017 at a center-of-mass (CM) energy of $5.02\,\mathrm{TeV}$ with an integrated luminosity of $302\,\mathrm{pb}^{-1}$ were analyzed, with a measured inclusive cross section of $62.3\pm1.5\,\mathrm{(stat)}\pm2.4\,\mathrm{(syst)}\pm1.2\mathrm{(lumi)}\,\mathrm{pb}$, consistent with standard model (SM) predictions. [...]
CMS-CR-2024-326.- Geneva : CERN, 2024 - 7 p. Fulltext: PDF;
In : 17th International Workshop on Top Quark Physics, Saint Malo, Fr, 22 - 27 Sep 2024

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2024-12-02
13:30
Offline secondary vertex reconstruction in the CMS detector / Tsai, Emily Minyun (Northeastern U.) /CMS Collaboration
Event reconstruction in particle detectors transforms detector signals into physics objects and, in large particle detectors, generally involves track reconstruction, vertex reconstruction, object reconstruction, and object identification. Vertex reconstruction typically involves two steps: clustering reconstructed tracks into vertex candidates, or seeds, and fitting the vertex candidates to obtain vertex parameters. [...]
CMS-CR-2024-322.- Geneva : CERN, 2024 - 7 p. Fulltext: PDF;
In : 12th Edition of the Large Hadron Collider Physics Conference, Boston, Us, 3 - 7 Jun 2024

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2024-12-02
13:29
High-precision measurement of the W boson mass at CMS / Bruschini, Davide (INFN, Pisa ; Pisa, Scuola Normale Superiore) /CMS Collaboration
The W boson mass is measured using proton-proton collision data corresponding to an integrated luminosity of 16.8 inverse fb recorded during 2016 by the CMS experiment. The W boson mass is obtained from a fit of the two-dimensional $p_T - \eta$ distribution in a sample of W $\to \mu\nu$ decays, categorized by charge, yielding one of the most precise measurements of the W mass to date..
CMS-CR-2024-317.- Geneva : CERN, 2024 - 5 p. Fulltext: PDF;
In : 35th Rencontres de Blois Particle Physics and Cosmology, Blois, Fr, 20 - 25 Oct 2024

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2024-12-02
13:29
Displaced Vertex Track Trigger for the CMS Phase-2 Upgrade / Ryan Edward Mccarthy /CMS Collaboration
As part of the CMS Phase-2 upgrade, track information from the outer tracker will be available at the Level-1 trigger and with this comes the expanded opportunity to trigger on physics objects such as long-lived particles. Presented here is a feasibility study in calculating displaced vertex information using an extended version of the Level-1 tracking that identifies displaced tracks. Combinations of tracks are used to form vertex candidates and a gradient-boosted decision tree is used to distinguish between misidentified and genuine displaced vertices. [...]
CMS-CR-2024-313.- Geneva : CERN, 2024 - 7 p. Fulltext: PDF;
In : 12th Edition of the Large Hadron Collider Physics Conference, Boston, Us, 3 - 7 Jun 2024

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2024-12-02
13:29
An overview of the CMS High-Granularity Calorimeter / Amendola, Chiara (CERN) /CMS Collaboration
Calorimetry at the High-Luminosity LHC (HL-LHC) faces two enormous challenges, particularly in the forward direction: radiation tolerance and unprecedented in-time event pileup. To meet these challenges, the CMS Collaboration is preparing to replace its current endcap calorimeters for the HL-LHC era with a high-granularity calorimeter (HGCAL), featuring an unprecedented transverse and longitudinal segmentation, for both the electromagnetic and hadronic sectors, with 5D information (space-time-energy) read out. [...]
CMS-CR-2024-234.- Geneva : CERN, 2024 - 7 p. Fulltext: PDF;
In : 25th international Workshop on Radiation Imaging Detectors (iWoRiD2024), Lisbon, Portugal, 30 Jun - 4 Jul 2024

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2024-11-25
11:10
Search for long-lived particles decaying to a pair of muons in proton-proton collisions at $\sqrt s$ = 13.6 TeV with 2022 data / Lopez Ruiz, Ruben (Cantabria Inst. of Phys.) /CMS Collaboration
Presented here is an inclusive search for long-lived particles decaying to a pair of displaced muons. This search analyzes data collected in 2022 by the CMS experiment at the CERN LHC in proton-proton collisions at $\sqrt s$=13.6 TeV, adding up to an integrated luminosity of 36.6 fb$^{-1}$. [...]
CMS-CR-2024-291.- Geneva : CERN, 2024 - 6 p. Fulltext: PDF;
In : 12th Edition of the Large Hadron Collider Physics Conference, Boston, Us, 3 - 7 Jun 2024

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2024-11-25
11:10
New ideas for measurements and searches at the HL-LHC / Soffi, Livia (INFN, Rome) /ALICE,ATLAS,CMS and LHCB Collaborations
The High-Luminosity Large Hadron Collider (HL-LHC) will operate at unprecedented luminosity, with substantial data boosts enhancing the search for new physics and precision measurements. This paper explores advancements in detector technology, novel search strategies, and cutting-edge analysis techniques aimed at maximizing the HL-LHC's physics potential. [...]
CMS-CR-2024-289.- Geneva : CERN, 2024 - 8 p. Fulltext: PDF;
In : 12th Edition of the Large Hadron Collider Physics Conference, Boston, Us, 3 - 7 Jun 2024

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2024-11-20
13:20
Search for BSM Physics in High-Mass Diphoton Events at CMS / Kamble, Samadhan (Indian Inst. Tech., Madras) /CMS Collaboration
We present the results from an extensive search for BSM particles in `high-mass diphoton events', a distinctive phase-space indicative of various SM extensions such as Supersymmetry, extra dimensions, and non-minimal Higgs sectors. The searches for both spin-0 and spin-2 particles in resonant as well as non-resonant scenarios were carried out using the full luminosity of the LHC Run-II in proton-proton collisions at $\sqrt{s}$ = 13 TeV with the CMS detector. [...]
CMS-CR-2024-312.- Geneva : CERN, 2024 - 6 p. Fulltext: PDF;
In : XVII International Conference on Interconnections between Particle Physics and Cosmology: PPC 2024, Hyderabad, In, 14 - 18 Oct 2024

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2024-11-20
13:20
Higgs boson production cross section and couplings in the W boson pair decay channel in pp collisions at $\sqrt{s}= 13$ TeV with the CMS detector / Dash, Ganapati (Indian Inst. Tech., Madras) /CMS Collaboration
The production cross sections of the Standard Model Higgs boson decaying into a pair of W bosons have been measured in proton-proton collisions at a center-of-mass energy of 13 TeV. The analysis targets Higgs bosons produced through gluon-gluon fusion, vector boson fusion, and in association with a vector boson. [...]
CMS-CR-2024-309.- Geneva : CERN, 2024 - 4 p. Fulltext: PDF;
In : XVII International Conference on Interconnections between Particle Physics and Cosmology: PPC 2024, Hyderabad, In, 14 - 18 Oct 2024

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