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CERN Accelerating science

CERN Preprints

Ultimi arrivi:
2024-06-21
04:47
Using graph neural networks to reconstruct charged pion showers in the CMS High Granularity Calorimeter / Alpana, A. (IISER, Pune) ; Kumar, N. (IISER, Pune) ; Aamir, M. (Maryland U.) ; Acar, B. (Lebanese U.) ; Adamov, G. (Serpukhov, IHEP ; GTU, Tbilisi) ; Adams, T. (Florida State U., Tallahassee (main)) ; Adloff, C. (Taiwan, Natl. Central U.) ; Afanasiev, S. (Dubna, JINR ; Higher Sch. of Economics, Moscow) ; Agrawal, C. (TIFR, Mumbai, DHEP) ; Agrawal, C. (IISER, Pune) et al.
A novel method to reconstruct the energy of hadronic showers in the CMS High Granularity Calorimeter (HGCAL) is presented. [...]
arXiv:2406.11937.
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Fulltext

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2024-06-20
17:56
Measurement of the polarizations of prompt and non-prompt $ \mathrm{J}/\psi $ and $\psi \text{(2S)} $ mesons produced in pp collisions at $ \sqrt{s} = $ 13 TeV
The polarizations of prompt and non-prompt $ \mathrm{J}/\psi $ and $\psi \text{(2S)} $ mesons are measured in proton-proton collisions at $ \sqrt{s} = $ 13 TeV, using data samples collected by the CMS experiment in 2017 and 2018, corresponding to a total integrated luminosity of 103.3 fb$ ^{-1} $. [...]
CERN-EP-2024-155 ; CMS-BPH-22-009-003.
- 2024.
Additional information for the analysis - CMS AuthorList - Fulltext - CMS HEPData

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2024-06-20
09:49
Precision measurement of the $\Xi_b^-$ baryon lifetime
A sample of $pp$ collision data, corresponding to an integrated luminosity of 5.5 fb$^{-1}$ and collected by the LHCb experiment during Run 2, is used to measure the ratio of the lifetime of the $\Xi^-_b$ baryon to that of the $\Lambda^0_b$ baryon, $r_{\tau}\equiv\tau_{\Xi^-_b}/\tau_{\Lambda^0_b}$. [...]
CERN-EP-2024-139 ; LHCB-PAPER-2024-010.
- 2024.
Fulltext - Previous draft version - Related data file(s)

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2024-06-20
04:08
Hadronic resonance production with ALICE at the LHC / Kiselev, Sergey (Kurchatov Inst., Moscow)
Recent results on short-lived hadronic resonances obtained with the ALICE detector at LHC energies are presented. [...]
arXiv:2406.12294.
- 8 p.
Fulltext

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2024-06-20
04:08
Photoproduction of J/$\psi$ and dileptons in Pb-Pb collisions with nuclear overlap / Bizé, Nicolas (SUBATECH, Nantes)
Photon-photon reactions and the production of J/$\psi$ meson through photonuclear reactions have been extensively studied in ultra-peripheral heavy-ion collisions, in which the impact parameter is larger than twice the nuclear radius. [...]
arXiv:2406.12630.
- 9 p.
Fulltext

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2024-06-20
04:07
Precision measurement of the $\Xi^-_b$ baryon lifetime / LHCb Collaboration
A sample of $pp$ collision data, corresponding to an integrated luminosity of 5.5 fb$^{-1}$ and collected by the LHCb experiment during Run 2, is used to measure the ratio of the lifetime of the $\Xi^-_b$ baryon to that of the $\Lambda^0_b$ baryon, $r_{\tau}\equiv\tau_{\Xi^-_b}/\tau_{\Lambda^0_b}$. [...]
arXiv:2406.12111 ; LHCb-PAPER-2024-01 ; CERN-EP-2024-139.
- 12 p.
Fulltext

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2024-06-19
04:53
A Double Copy of Geometry / Helset, Andreas (CERN)
We propose an extension of the color-kinematics duality for nonlinear sigma models with nonsymmetric cosets. [...]
CERN-TH-2024-086 ; arXiv:2406.10955.
- 5 p.
Fulltext

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2024-06-19
04:46
Rare leptonic and semi-leptonic decays at LHCb / Hadavizadeh, Tom (Monash U.)
Rare leptonic and semi-leptonic decays offer an excellent opportunity to test the Standard Model of Particle Physics. [...]
arXiv:2406.11108.
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2024-06-18
10:31
Heavy-flavour tagging at the CMS experiment / Zaza, Angela (INFN, Bari ; Bari U.) /CMS Collaboration
At the CMS experiment, the identification of heavy-flavour jets, i.e., jets originating from bottom and charm quarks, is crucial for many standard model (SM) measurements, mostly involving the top quark and the Higgs boson, and searches for new physics. The CMS Collaboration developed extremely powerful jet tagging algorithms based on state-of-the-art deep learning methods, which will be illustrated in this contribution. [...]
CMS-CR-2024-098.- Geneva : CERN, 2024 - 11 p. Fulltext: PDF;
In : International Conference for New Frontiers in Physics 2023, Kollymbari, Crete, Gr, 10 - 22 Jul 2023

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2024-06-18
10:31
Search for LFV with tau leptons in the final state / Guzzi, Luca (INFN, Milan Bicocca) /CMS Collaboration
In the Standard Model (SM) lepton flavour numbers are approximately conserved at energies accessible to current experiments, where lepton flavour violation is extremely suppressed. The observation of neutrino oscillations, however, proves that neutrinos are massive particles and allows for additional Lepton Flavour Violating (LFV) processes also at low energies [...]
CMS-CR-2024-080.- Geneva : CERN, 2024 - 11 p. Fulltext: PDF;
In : 17th International Workshop on Tau Lepton Physics (TAU 2023), Louisville, Kentucky, United States, 4 - 8 Dec 2023

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