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CERN Preprints

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2025-03-18
04:01
Forecasting Constraints on SIGW with Future Pulsar Timing Array Observations / Cecchini, Chiara ; Franciolini, Gabriele ; Pieroni, Mauro
Pulsar Timing Arrays are playing a crucial role in the ongoing gravitational wave astronomy revolution. [...]
CERN-TH-2025-045 ; arXiv:2503.10805. - 18.
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2025-03-18
04:00
High efficiency veto hadron calorimeter in the NA64 experiment at CERN / NA64 Collaboration
NA64 is a fixed-target experiment at the CERN SPS designed to search for Light particle Dark Matter (LDM) candidates with masses in the sub-GeV range. [...]
CERN-EP-2025-04 ; arXiv:2503.11275. - 13.
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2025-03-17
16:34
Search for cascade decays of charged sleptons and sneutrinos in final states with three leptons and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
A search for cascade decays of charged sleptons and sneutrinos using final states characterized by three leptons (electrons or muons) and missing transverse momentum is presented. [...]
CERN-EP-2025-045. - 2025
Fulltext - Previous draft version

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2025-03-17
15:00
Experience with the alpaka performance portability library in the CMS software / ius ; ejdl
To achieve better computational efficiency and exploit a wider range of computing resources, the CMS software framework (CMSSW) has been extended to offload part of the physics reconstruction to NVIDIA GPUs. To support additional back-ends, as well to avoid the need to write, validate and maintain a separate implementation of the reconstruction algorithms for each back-end, CMS has adopted the Alpaka performance portability library. Alpaka (Abstraction Library for Parallel Kernel Acceleration) is a header-only C++ library that provides performance portability across different back-ends, abstracting the underlying levels of parallelism. [...]
CMS-CR-2025-095.- Geneva : CERN, 2025 - 9 p. Fulltext: PDF;
In : 27th International Conference on Computing in High Energy & Nuclear Physics, Kraków, Pl, 19 - 25 Oct 2024

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2025-03-17
15:00
Dead cone effect and charm quark mass effects in high-pT D-jets with the CMS experiment / Mijuskovic, Jelena (INFN, Rome ; Rome U.) /CMS Collaboration
The mass of heavy quarks modifies the radiation pattern of heavy-quark jets in comparison to their light quark counterparts, since the heavy quark mass effectively regularizes the soft and collinear divergences that would normally dominate the partonic cascade formation. This leads to the depletion of collinear gluon emissions relative to the heavy quark, an effect known as the dead cone effect. [...]
CMS-CR-2025-090.- Geneva : CERN, 2025 - 7 p. Fulltext: PDF;
In : 12th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, Nagasaki, Nagasaki, Jp, 22 - 27 Sep 2024

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2025-03-17
15:00
Probing global symmetries with top and Higgs at CMS / Chanon, Nicolas Pierre (IP2I, Lyon) /CMS Collaboration
Several global symmetries of the Standard Model Lorentz invariance, CPT and CP symmetries are tested with top quarks and Higgs bosons using LHC data collected with the CMS detector. Top-antitop ($t\bar{t}$) production is used to probe CPT symmetry and Lorentz invariance. [...]
CMS-CR-2025-076.- Geneva : CERN, 2025 - 8 p. Fulltext: PDF;

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2025-03-17
15:00
Constraining the color-charge effects of energy loss with jet axis-based substructure studies in PbPb collisions at 5.02 TeV / Pradhan, Raghunath (Illinois U., Chicago) /CMS Collaboration
This study investigates jet axis decorrelation in inclusive jets using lead-lead (PbPb) collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The decorrelation is defined as the angular difference between two jet axis definitions, obtained by applying different recombination schemes to the constituents of jets reconstructed with the anti-$k_{\mathrm{T}}$ sequential algorithm and a distance parameter of $R= 0.4$. [...]
CMS-CR-2025-052.- Geneva : CERN, 2025 - 7 p. Fulltext: PDF;
In : 12th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, Nagasaki, Nagasaki, Jp, 22 - 27 Sep 2024

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2025-03-17
15:00
Probing bottom quark mass effects in jet substructure with CMS using a novel technique to cluster the b-hadron decays / Kalipoliti, Lida (Ecole Polytechnique) /CMS Collaboration
The study of jet substructure has given rise to a new era of precision quantum-chromodynamics (QCD) measurements related to the evolution of the parton shower. In order to better understand the role of the quark mass, the decay kinematics of the heavy flavor hadrons need to be isolated from the QCD branchings. [...]
CMS-CR-2025-050.- Geneva : CERN, 2025 - 6 p. Fulltext: PDF;
In : 12th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, Nagasaki, Nagasaki, Jp, 22 - 27 Sep 2024

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2025-03-15
04:51
Lectures on Field Theory and the Standard Model: A Symmetry-Oriented Approach / Álvarez-Gaumé, Luis (Stony Brook U., New York, SCGP) ; Vázquez-Mozo, Miguel Á. (Salamanca U., IUFFyM)
The standard model of particle physics represents the cornerstone of our understanding of the microscopic world. [...]
arXiv:2306.08097. - 136.
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2025-03-15
04:31
$\eta$, $\eta^\prime$ mesons from lattice QCD in fully physical conditions / Ottnad, Konstantin (U. Mainz, PRISMA ; Mainz U., Inst. Kernphys.) ; Bacchio, Simone (Cyprus Inst.) ; Finkenrath, Jacob (CERN) ; Kostrzewa, Bartosz (Bonn U., HISKP ; U. Bonn, Phys. Inst., BCTP) ; Petschlies, Marcus (Bonn U., HISKP ; U. Bonn, Phys. Inst., BCTP) ; Pittler, Ferenc (Cyprus Inst.) ; Urbach, Carsten (Bonn U., HISKP ; U. Bonn, Phys. Inst., BCTP) ; Wenger, Urs (Bern U.)
We determine masses and mixing parameters of the $\eta$ and $M_{\eta^\prime}$ meson in lattice QCD. [...]
MITP-25-021 ; CERN-TH-2025-052 ; arXiv:2503.09895. - 24.
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