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2024-09-25
04:15
Plausible constraints and inflationary production for dark photons / Cline, James M. (McGill U. ; CERN) ; Herrera, Gonzalo (CERN ; Virginia Tech.)
Generic constraints on dark photons are generally presented assuming they have Stueckelberg masses. [...]
CERN-TH-2024-154 ; arXiv:2409.13818. - 5 p.
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2024-09-25
04:15
Kolya: an open-source package for inclusive semileptonic $B$ decays / Fael, Matteo (CERN) ; Milutin, Ilija S. (Siegen U.) ; Vos, K. Keri (Maastricht U. ; NIKHEF, Amsterdam)
We introduce the code kolya, an open-source tool for phenomenological analyses of inclusive semileptonic $B$ meson decays. [...]
Nikhef 2023-022 ; CERN-TH-2024-155 ; SI-HEP-2024-20 ; P3H-24-065 ; arXiv:2409.15007. - 37 p.
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2024-09-24
08:36
Search for same-charge top-quark pair production in $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector / ATLAS Collaboration
A search for the production of top-quark pairs with the same electric charge ($tt$ or $\bar{t}\bar{t}$) is presented. [...]
arXiv:2409.14982 ; CERN-EP-2024-226. - 2024. - 52 p, 52 p.
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2024-09-24
04:25
New insights into strange-quark hadronization measuring multiple (multi-)strange hadron production in small collision systems with ALICE / Pucillo, Sara (Turin U.)
Among the most important results from the Run-1 and Run-2 of the LHC is the observation of an enhanced production of (multi-)strange to non-strange hadron yields, gradually rising from low-multiplicity to high-multiplicity pp and p--Pb collisions, reaching values close to those measured in peripheral Pb--Pb collisions. [...]
arXiv:2409.12987. - 4 p.
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2024-09-24
04:21
Testing CPT symmetry via precision mass measurements of multi-strange baryons in ALICE / Schotter, Romain (Stefan Meyer Inst. Subatomare Phys.)
In these proceedings, the measurements of the $\Xi^-$, $\overline{\Xi}^+$, $\Omega^-$, $\overline{\Omega}^+$ masses and the mass differences between particle and anti-particle have been measured in pp collisions collected by the ALICE Collaboration during LHC Run 2. [...]
arXiv:2409.13593. - 4 p.
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2024-09-23
11:42
CMS track reconstruction performance and tracking developments during Run 3 / Bruschini, Davide (INFN, Pisa ; Pisa, Scuola Normale Superiore) /CMS Collaboration
The efficient and precise reconstruction of charged particle tracks is crucial for the overall performance of the CMS experiment. Prior to the beginning of the Run 3 at the LHC in 2022, the first layer of the Tracker Barrel Pixel subdetector was replaced in order to cope with the high pileup environment, and significant upgrades were made to the track reconstruction algorithms. [...]
CMS-CR-2024-176.- Geneva : CERN, 2024 - 7 p. Fulltext: PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024

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2024-09-23
11:42
Rare and forbidden decays / Wang, Zhangqier (MIT) /ATLAS and CMS Collaborations
Recent measurements of rare decays involving the b-flavor changing neutral current at the CMS and ATLAS experiments are presented. The full set of optimized CP-averaged observables is measured in the angular analysis of the decay ${\mathrm{B}^0} \to \mathrm{K^{\ast 0}(892)} \mu^+\mu^-$ using CMS Run 2 data. [...]
CMS-CR-2024-156.- 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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2024-09-23
11:42
Ricerche di nuova fisica con oggetti pesanti ad alto boost di Lorentz in eventi con jet / Favilla, Leonardo (INFN, Naples) /CMS Collaboration
Le ricerche di nuova fisica nel regime con un elevato boost di Lorentz sono una parte cruciale del programma di fisica di LHC, in quanto potrebbero rivelare la presenza di nuove risonanze pesanti, previste da modelli di fisica oltre il Modello Standard a masse elevate. Nella collaborazione CMS, numerosi algoritmi di boosted-jet tagging sono stati sviluppati per identificare jet adronici che originano appunto dal decadimento di particelle del Modello Standard come quark top, bosoni di Higgs o bosoni vettori, e impiegati in una vasta gamma di analisi. [...]
CMS-CR-2024-151.- Geneva : CERN, 2024 - 8 p. Fulltext: PDF;
In : 20th Incontri di Fisica delle Alte Energie (IFAE 2024), Florence, Itlay, 3 - 5 Apr 2024

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2024-09-23
11:42
Latest results on $B_c^+$ at ATLAS and CMS / Mastrapasqua, Vincenzo (INFN, Bari ; Bari U.) /ATLAS and CMS Collaborations
The present report deals with recent results on the $B_c^+$ meson at the CMS and ATLAS experiments at the LHC: aspects such as the $B_c^+$ production, its decay mechanisms, and the observation of excited states are investigated..
CMS-CR-2023-194.- Geneva : CERN, 2023 - 6 p. Fulltext: PDF;
In : 20th International Conference on Hadron Spectroscopy and Structure (HADRON 2023), Genova, Italy, 5 - 9 Jun 2023

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2024-09-21
04:17
The ALICE 3 detector concept for LHC Runs 5 and 6 and its physics performance / Vertesi, Robert (Wigner RCP, Budapest)
The LHC Run 5 and 6 data taking phases will bring unprecedented luminosity in high-energy proton-proton and in heavy-ion collisions. [...]
arXiv:2409.12148. - 7 p.
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