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CERN Accelerating science

CERN Preprints

新增:
2024-06-22
07:40
Candidate de Sitter Vacua / McAllister, Liam (Cornell U., Phys. Dept.) ; Moritz, Jakob (Princeton U.) ; Nally, Richard (Cornell U., Phys. Dept.) ; Schachner, Andreas (Cornell U., Phys. Dept. ; Munich U., ASC)
We construct compactifications of type IIB string theory that yield, at leading order in the $\alpha^\prime$ and $g_s$ expansions, de Sitter vacua of the form envisioned by Kachru, Kallosh, Linde, and Trivedi. [...]
CERN-TH-2024-090 ; arXiv:2406.13751.
- 64 p.
Fulltext

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2024-06-22
07:34
LO, NLO, and NNLO Parton Distributions for LHC Event Generators / Cruz-Martinez, Juan (CERN) ; Forte, Stefano (INFN, Milan ; Milan U.) ; Laurenti, Niccolo (INFN, Milan ; Milan U.) ; Rabemananjara, Tanjona R. (Vrije U., Amsterdam ; NIKHEF, Amsterdam) ; Rojo, Juan (Vrije U., Amsterdam ; NIKHEF, Amsterdam)
We present NNPDF4.0MC, a variant of the NNPDF4.0 set of parton distributions (PDFs) at LO, NLO and NNLO, with and without inclusion of the photon PDF, suitable for use with Monte Carlo (MC) event generators, which require PDFs to satisfy additional constraints in comparison to standard PDF sets. [...]
CERN-TH-2024-080 ; TIF-UNIMI-2024-4 ; arXiv:2406.12961.
- 14 p.
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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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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 / CMS Collaboration
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} $. [...]
CMS-BPH-22-009 ; CERN-EP-2024-155 ; arXiv:2406.14409 ; CMS-BPH-22-009-003.
- 2024.
Additional information for the analysis - CMS AuthorList - Fulltext - CMS HEPData - Fulltext

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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 - Related data file(s) - Supplementary information

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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.
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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.
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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.
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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.
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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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