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CERN Document Server 476 registres trobats  1 - 10següentfinal  anar al registre: La cerca s'ha fet en 0.77 segons. 
1.
Searches for Lepton Number Violation and Resonances in the $K^{\pm}\to \mu\nu\nu$ Decays by NA48/2 at CERN / Zinchenko, A (Dubna, JINR) /NA48/2 Collaboration
The NA48/2 experiment at CERN collected a large sample of charged kaon decays into final states with multiple charged particles in 2003–2004. A new upper limit on the rate of the lepton number violating decay → \(\pi ^{ \mp }\)µ^±µ^± obtained from this sample is reported: B(K^± → \(\pi ^{ \mp }\)µ^±µ^±) < 8.6 × 10^−11 at 90% CL. [...]
2017 - 6 p. - Published in : JPS Conf. Proc. 13 (2017) 020061 Fulltext: fulltext1516489 - PDF; publication - PDF;
In : 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2016), Kyoto, Japan, 25 - 30 Jul 2016, pp.020061
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2.
Lepton Flavour Universality Tests Using Semileptonic b-Hadron Decays at the LHCb Detector / Kutsenko, Bogdan (Marseille, CPPM) /LHCb Collaboration
This review highlights advancements in testing Lepton Flavour Universality (LFU) through semileptonic b-hadron decays at the LHCb detector. Measurements of the LFU and provide evidence of deviations from Standard Model (SM) predictions, suggesting the presence of possible New Physics (NP). [...]
2025 - 10 p. - Published in : Particles 8 (2025) 5 Fulltext: PDF;
In : 13th International Conference on New Frontiers in Physics 2024 (ICNFP 2024), Kolymbari, Greece, 26 Aug - 4 Sep 2024, pp.5
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3.
Search for heavy neutral leptons in $\pi^+$ decays to positrons / Bloch-Devaux, Brigitte (Louvain U., CP3 ; Birmingham U.) ; Cortina Gil, Eduardo (Louvain U., CP3) ; Minucci, Elisa (Louvain U., CP3 ; Frascati) ; Padolski, Sergey (Louvain U., CP3) ; Petrov, Plamen (Louvain U., CP3) ; Numao, Toshio (TRIUMF) ; Petrov, Yevgeniy (TRIUMF) ; Velghe, Bob (TRIUMF) ; Wong, Vincent Wai Sum (TRIUMF) ; Shang, Victor (TRIUMF) et al.
A search for heavy neutral lepton ($N$) production in $\pi^+\to e^+ N$ in-flight decays using data collected by the NA62 experiment at CERN in 2017-2024 is reported. Upper limits for the extended neutrino mixing matrix element $|U_{e4}|^2$ are established at the level of $10^{-8}$ for heavy neutral leptons with mass in the range 95-126 MeV/$c^2$ and lifetime exceeding 50 ns..
arXiv:2507.07345; CERN-EP-2025-152.- Geneva : CERN, 2025 - 16 p. Draft (restricted): PDF; Fulltext: CERN-EP-2025-152 - PDF; 2507.07345 - PDF;
Registre complet - 14 comentaris
4.
Search for heavy neutral leptons in decays of W bosons using leptonic and semi-leptonic displaced vertices in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS detector / ATLAS Collaboration
A search is performed for long-lived heavy neutral leptons (HNLs), produced through the decay of a $W$ boson along with a muon or electron. Two channels are explored: a leptonic channel, in which the HNL decays into two leptons and a neutrino, and a semi-leptonic channel, in which the HNL decays into a lepton and a charged pion. [...]
arXiv:2503.16213; CERN-EP-2025-052.- Geneva : CERN, 2025-07-17 - 53 p. - Published in : JHEP 2507 (2025) 196 Fulltext: 2503.16213 - PDF; publication - PDF; document - PDF; External link: Previous draft version
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5.
Searches for Lepton Flavor Universality Violation at CMS / Chistov, R (Moscow, MIPT ; Lebedev Inst.) /CMS Collaboration
In this talk recent new results from CMS on the search for New Physics effects in heavy flavor decays are presented. Particularly, lepton flavor unification violation was searched for by measuring $R(K)$ and $R(J/\psi)$ ratios. [...]
2025 - 3 p. - Published in : Moscow Univ. Phys. Bull.: 79 (2024) , no. Suppl 1, pp. 56-58
Fulltext: PDF;
In : 21st Lomonosov Conference on Elementary Particle Physics, Moscow, Russia, 24 - 30 Aug 2023, pp.56-58
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6.
Measurements of vector-boson scattering with the ATLAS experiment / Wang, Xi (Shanghai Jiao Tong University (CN)) /ATLAS Collaboration
Measurements of diboson production in association with two additional jets at the LHC probe interactions between electroweak vector bosons predicted by the Standard Model and test contributions from anomalous quartic gauge couplings. The ATLAS experiment has recently performed such measurements in a variety of final states, amongst them the scattering into a massive electroweak gauge boson and a photon. [...]
ATL-PHYS-SLIDE-2024-389.- Geneva : CERN, 2024 - 19 p. Fulltext: ATL-PHYS-SLIDE-2024-389 - PDF; VBS_measurements_ATLAS_Xi_Wang - PDF; External link: Original Communication (restricted to ATLAS)
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7.
First search for $K^+ \to \pi^0 \pi \mu e$ decays / NA62 Collaboration
The first search for the lepton number violating decay $K^+ \to \pi^0 \pi^- \mu^+ e^+$ and lepton flavour violating decays $K^+ \to \pi^0 \pi^+ \mu^- e^+$, $K^+ \to \pi^0 \pi^+ \mu^+ e^-$ has been performed using a dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of $2.9\times 10^{-10}$, $3.1 \times 10^{-10}$ and $5.0 \times 10^{-10}$, respectively, are obtained at 90% CL for the branching ratios of the three decays on the assumption of uniform phase-space distributions..
arXiv:2409.12981; CERN-EP-2024-224.- Geneva : CERN, 2024-11-12 - 9 p. - Published in : Phys. Lett. B 859 (2024) 139122 Draft (restricted): PDF; Fulltext: CERN-EP-2024-224 - PDF; 2409.12981 - PDF; Publication - PDF;
Registre complet - 4 comentaris
8.
The XV International Conference on Beauty, Charm, Hyperons in Hadronic Interactions (BEACH 2024) - BEACH 2024   3 - 7 Jun 2024  - Charleston, Sc, Us  / Petrov, A (ed.) (University of South Carolina)
2024
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9.
Higgs boson coupling properties to fermions and search for rare and LFV Higgs boson decays with ATLAS / Gagnon, Louis-Guillaume (University of California Berkeley (US)) /ATLAS Collaboration
The Yukawa couplings of the Higgs boson to quarks and leptons are an important window into the mechanism of electroweak symmetry breaking and the origin of fermion masses. This talk presents several measurements of Higgs boson decays to bottom quarks, tau leptons and muons, as well as constraints on the rate of Higgs boson decays to charm quarks and on the magnitude of the charm-Yukawa coupling. [...]
ATL-PHYS-SLIDE-2024-072.- Geneva : CERN, 2024 Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
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10.
Search for flavour-changing neutral-current couplings between the top quark and the Higgs boson in multi-lepton final states in 13 TeV $pp$ collisions with the ATLAS detector / ATLAS Collaboration
A search is presented for flavour-changing neutral-current interactions involving the top quark, the Higgs boson and an up-type quark ($q=u,c$) with the ATLAS detector at the Large Hadron Collider. The analysis considers leptonic decays of the top quark along with Higgs boson decays into two $W$ bosons, two $Z$ bosons or a $\tau^{+}\tau^{-}$ pair. [...]
arXiv:2404.02123; CERN-EP-2024-070; CERN-EP-2024-070.- Geneva : CERN, 2024-07-29 - 62 p. - Published in : Eur. Phys. J. C 84 (2024) 757 Fulltext: 2404.02123 - PDF; document - PDF; External link: Previous draft version
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