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2026-01-20
06:55
Differential measurements of $\bar{t}tZ$ and $\bar{t}t\bar{t}t$ at large $Q^2$ at FCC-hh / Beriet, Louise (Lund U. (main) ; CERN) ; Defranchis, Matteo (CERN) ; Stapf, Birgit (CERN) ; Selvaggi, Michele (CERN)
This contribution presents studies of differential top-quark measurements at the Future Circular Collider in its proton-proton stage (FCC-hh). [...]
arXiv:2601.04763. - 2026 - 7.
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2026-01-20
06:55
Dressing and Screening in Anti-de Sitter / Ankur (U. Trieste (main) ; INFN, Trieste ; CAS, Beijing) ; Di Pietro, Lorenzo (Trieste U. ; INFN, Trieste) ; Gorbenko, Victor (Ecole Polytechnique, Lausanne) ; Komatsu, Shota (CERN) ; Sacchi, Veronica (Ecole Polytechnique, Lausanne)
Motivated by a question of defining gauge-invariant observables in cosmology and by the close connection between perturbation theory in de Sitter (dS) and Anti-de Sitter (AdS), we study scalar electrodynamics in AdS in setups that are largely unexplored but relevant for dS physics. [...]
arXiv:2601.04321. - 2026 - 79.
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2026-01-20
06:54
Quantum properties of heavy-fermion pairs at a lepton collider with polarised beams / Altakach, Mohammad Mahdi (Lebanese U.) ; Lamba, Priyanka (Bologna U. ; INFN, Bologna) ; Maltoni, Fabio (Bologna U. ; INFN, Bologna ; Louvain U., CP3 ; CERN) ; Sakurai, Kazuki (Warsaw U.)
We investigate the quantum properties of heavy-fermion pairs, such as $t\bar t$ or $τ^+τ^-$, produced in lepton-lepton collisions with polarised beams. [...]
arXiv:2601.09558. - 2026 - 46.
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2026-01-20
06:54
Dark Matter emission at Belle II and NA62 in Minimal Flavor Violation framework / Mescia, Federico (Frascati) ; Okawa, Shohei (APCTP, Pohang ; POSTECH ; Kyushu U., Fukuoka (main)) ; Swallow, Joel (CERN) ; Toni, Claudio (Annecy, LAPTH)
Minimal Flavor Violation (MFV) provides a compelling framework for exploring physics beyond the Standard Model, in which new QCD-singlet fields transforming under the global $\mathrm{SU}(3)^3$ quark flavor symmetry can naturally be stable and act as dark matter (DM) candidates. [...]
KYUSHU-HET-349 ; LAPTH-004/26 ; arXiv:2601.08907. - 2026 - 26.
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2026-01-19
18:48
Status and performance of the CMS Electromagnetic Calorimeter in Run 3 of LHC / Tornago, Marta (IRFU, Saclay) /CMS Collaboration
The Electromagnetic Calorimeter (ECAL) of the CMS experiment at the LHC plays a vital role in various physics analyses, including Higgs boson studies and searches for new phenomena. Achieving accurate calibration of the detector and its individual channels is critical for optimizing the energy resolution of electrons and photons, as well as for measuring the electromagnetic components of jets and contributing to energy sums used to detect particles that do not generate a signal in the detector. [...]
CMS-CR-2026-002.- Geneva : CERN, 2026 - 11 p. Fulltext: PDF;
In : 14th International Conference on New Frontiers in Physics 2025 (ICNFP 2025), Kolymbari, Crete, Gr, 17 - 31 Jul 2025

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2026-01-19
18:48
Refining Tau Identification with Domain Adaptation Techniques at CMS / Zakharov, Stepan (DESY) /CMS Collaboration
Hadronically decaying tau leptons are a challenging signature to study given it can be mimicked by quark and gluon jets, electrons, or muons. The identification of this signature via a convolutional neural network performed by CMS during the LHC Run 2 brought a massive improvement with respect to previous strategies. [...]
CMS-CR-2025-284.- Geneva : CERN, 2025 - 7 p. Fulltext: PDF;
In : 2025 European Physical Society Conference on High Energy Physics (EPS-HEP 2025), Marseille, France, 7 - 11 Jul 2025

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2026-01-19
18:48
Search for Physics beyond the Standard Model in four- and three-top quark production / Shooshtari, Maryam (OAW, Vienna) /CMS Collaboration
A reinterpretation of four-top quark ($t\bar{t}t\bar{t}$) production is presented using the full Run~2 dataset recorded by the CMS experiment, corresponding to an integrated luminosity of 138\,fb$^{-1}$. The analysis targets BSM scenarios using the existing \tttt production measurement, including constraints on effective field theory (EFT) operators, top-philic heavy resonances, and the top-Yukawa coupling. [...]
CMS-CR-2025-260.- Geneva : CERN, 2025 - 7 p. Fulltext: PDF;
In : 18th International Workshop on Top Quark Physics (TOP2025), Seoul, South Korea, 21 - 26 Sep 2025

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2026-01-19
18:48
Review of the performance of the CMS hadron calorimeter / Wei, Yide (Nanjing Normal U.) ; Wang, Hui (Nanjing Normal U.) /CMS Collaboration
The hadron calorimeter is a central component of the CMS detector, vital for measuring hadron energies and reconstructing missing transverse momentum. This paper reviews its performance before and after the Phase~1 upgrade (completed in 2019), which upgraded both back-end and front-end electronics, including photodetectors and charge-integrating ADC with precise-timing TDC, as well as its depth segmentation in the barrel and endcaps. [...]
CMS-CR-2025-251.- Geneva : CERN, 2025 - 12 p. Fulltext: PDF;
In : 14th International Conference on New Frontiers in Physics 2025 (ICNFP 2025), Kolymbari, Crete, Gr, 17 - 31 Jul 2025

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2026-01-19
18:48
The CMS ME0 Upgrade Enhancing Forward Muon Reconstruction at the HL-LHC / Kaur, Anureet (Panjab U.) /CMS Collaboration
The CMS muon system is undergoing substantial upgrades to meet the challenges of the High-Luminosity LHC (HL-LHC), including the installation of the new Muon Endcap 0 (ME0) detector. Large-scale production started in 2024. [...]
CMS-CR-2025-249.- Geneva : CERN, 2025 - 6 p. Fulltext: PDF;
In : The 32nd International Symposium on Lepton Photon Interactions at High Energies (Lepton Photon 2025), Madison, Wisconsin, Us, 25 - 29 Aug 2025

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2026-01-19
18:48
Searches in CMS for new physics in final states with leptons / Kaur, Anureet (Panjab U.) /CMS Collaboration
Many new physics models, such as the Sequential Standard Model, Grand Unified Theories, models of extra dimensions, or models like leptoquarks or vector-like leptons, predict heavy mediators at the TeV energy scale. We present recent results of such searches in leptonic final states obtained using data recorded by the CMS experiment during Run-II of the LHC..
CMS-CR-2025-248.- Geneva : CERN, 2025 - 6 p. Fulltext: PDF;
In : The 32nd International Symposium on Lepton Photon Interactions at High Energies (Lepton Photon 2025), Madison, Wisconsin, Us, 25 - 29 Aug 2025

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