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2024-11-08
10:55
Photon production in top quark events at ATLAS and CMS / Ribeiro Lopes, Beatriz (CERN) /ATLAS and CMS Collaborations
Top quark production in association with a photon offers a unique test ground for the standard model predictions, as it is sensitive to the top-photon coupling. These processes are rare when compared to standard top pair production, however the large amounts of data delivered by the LHC open the window to precise measurements. [...]
CMS-CR-2024-256.- 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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2024-11-08
09:21
Design of a Level-1 Long-Lived Particle Trigger in the CMS Hadron Calorimeter / Kopp, Gillian Baron (Princeton U.) ; Tully, Christopher (Princeton U.) ; Chung, Wonyong Paul (Princeton U.) ; Kennedy, Kiley Elizabeth (Princeton U.) ; Hoienko, Svitlana (Princeton U.) ; Mans, Jeremiah Michael (Minnesota U.) ; Krohn, Michael David (Minnesota U.) ; Crossman, Bryan James (Minnesota U.) ; Hiltbrand, Joshua (Baylor U.) ; Skuja, Andris (Maryland U.) et al.
The Hadron Calorimeter (HCAL) in the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) was recently upgraded for Run 3 to introduce depth segmentation and online timing measurements, expanding the physics capabilities. In particular, the augmentation of the calorimeter information at the hardware trigger level enables quick identification and recording of long-lived particle decays using lower thresholds on energy-based event quantities. [...]
CMS-CR-2024-257.- Geneva : CERN, 2024 - 5 p. Fulltext: PDF;
In : 12th Edition of the Large Hadron Collider Physics Conference, Boston, Us, 3 - 7 Jun 2024

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2024-11-08
09:21
Run 3 performance and advances in heavy-flavor jet tagging in CMS / Sarkar, Uttiya (Aachen, Tech. Hochsch.) /CMS Collaboration
Identification of hadronic jets originating from heavy-flavor quarks is extremely important to several physics analyses in High Energy Physics, such as studies of the properties of the top quark and the Higgs boson, and searches for new physics. Recent algorithms used in the CMS experiment were developed using state-of-the-art machine-learning techniques to distinguish jets emerging from the decay of heavy flavour (charm and bottom) quarks from those arising from light-flavor (udsg) ones. [...]
CMS-CR-2024-247.- Geneva : CERN, 2024 - 14 p. Fulltext: PDF;
In : 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024

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2024-11-08
04:25
Ultra-Slow-Roll Inflation on the Lattice: Backreaction and Nonlinear Effects / Caravano, Angelo (Paris, Inst. Astrophys.) ; Franciolini, Gabriele (CERN) ; Renaux-Petel, Sébastien (Paris, Inst. Astrophys.)
Violating the slow-roll regime during the final stages of inflation can significantly enhance curvature perturbations, a scenario often invoked in models producing primordial black holes and small-scale scalar induced gravitational waves. [...]
arXiv:2410.23942. - 17.
Fulltext

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2024-11-08
04:22
Photon production in top quark events at ATLAS and CMS / Lopes, Beatriz Ribeiro (CERN)
Top quark production in association with a photon offers a unique test ground for the standard model predictions, as it is sensitive to the top-photon coupling. [...]
arXiv:2411.03981. - 7.
Fulltext

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2024-11-08
04:22
A Low-Cost, Low-Power Media Converter Solution for Next-Generation Detector Readout Systems / Perro, Alberto (CERN ; Marseille, CPPM) ; Vodnik, Mitja (CERN ; Stefan Inst., Ljubljana) ; Durante, Paolo (CERN)
High Energy Physics (HEP) data acquisition systems are often built from high-end FPGAs. [...]
arXiv:2410.23173. - 7.
Fulltext

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2024-11-07
15:30
Study of $D_{s1}^+(2460) \to D_s^+ \pi^+ \pi^-$ in $B \to \overline D^{(*)} D_s^+ \pi^+ \pi^-$ decays / LHCb Collaboration
An amplitude analysis of the $D_{s1}(2460)^+\to D_{s}^{+}\pi^{+}\pi^{-}$ transition is performed simultaneously in $B^{0}\to D^{-}D_{s}^{+}\pi^{+}\pi^{-}$, $B^{+}\to \overline D^{0} D_{s}^{+}\pi^{+}\pi^{-}$}, and $B^{0}\to D^{*-}D_{s}^{+}\pi^{+}\pi^{-}$ decays [...]
LHCb-PAPER-2024-033 ; CERN-EP-2024-264 ; arXiv:2411.03399 ; LHCB-PAPER-2024-033. - 2024
Fulltext - Previous draft version - Related data file(s) - Fulltext

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2024-11-07
09:59
Constraining the TeV gamma-ray emission of SN 2024bch: a possible type IIn-L from a RSG progenitor /RE23/CTA-LST Collaboration
We present very-high-energy, optical photometry and spectroscopic observations of SN 2024bch. We use gamma-ray observations performed with the first CTAO Large-Sized Telescope (LST-1) and optical observations with the Liverpool Telescope (LT), combined with data from public repositories to evaluate general properties of the event and of the progenitor star. [...]
CERN-RE23-2024-005.- Geneva : CERN, 2024 SN2024bch_v1: PDF;

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2024-11-07
04:54
Intergalactic magnetism in a gamma-ray beam as a model of Porphyrion / Neronov, A. ; Vazza, F. ; Brandenburg, A. ; Caprini, C.
We estimate the magnetic field in the jets of the recently discovered 7 Mpc long Porphyrion system. [...]
NORDITA-2024-041 ; CERN-TH-2024-187 ; arXiv:2411.01640. - 5.
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2024-11-07
04:52
Search for a Hidden Sector Scalar from Kaon Decay in the Di-Muon Final State at ICARUS / ICARUS Collaboration
We present a search for long-lived particles (LLPs) produced from kaon decay that decay to two muons inside the ICARUS neutrino detector. [...]
FERMILAB-PUB-24-0581-PPD ; arXiv:2411.02727. - 9.
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