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Constraints on the photon polarisation in b → sγ transitions using $$ {B}_s^0 $$ → ϕe+e− decays

4Citations signalées — pas une note de qualité
123Institutions déclarées
22Pays d’affiliation déclarés

Résumé fourni par la source

A bstract An angular analysis of the $$ {B}_s^0 $$ B s 0 → ϕe + e − decay is performed using the proton-proton collision dataset collected between 2011 and 2018 by the LHCb experiment, corresponding to an integrated luminosity of 9 fb − 1 at centre-of-mass energies of 7, 8 and 13 TeV. The analysis is performed in the very low dielectron invariant mass-squared region between 0 . 0009 and 0 . 2615 GeV 2 /c 4 . The longitudinal polarisation fraction of the ϕ meson is measured to be less than 11.5% at 90% confidence level. The $$ {A}_{\textrm{T}}^{\mathcal{R} eCP} $$ A T R eCP observable, which is related to the lepton forward-backward asymmetry, is measured to be 0 . 116 ± 0 . 155 ± 0 . 006, where the first uncertainty is statistical and the second systematic. The transverse asymmetries, $$ {A}_{\textrm{T}}^{(2)} $$ A T 2 and $$ {A}_{\textrm{T}}^{\mathcal{I} mCP} $$ A T I mCP , which are sensitive to the virtual photon polarisation, are found to be − 0 . 045 ± 0 . 235 ± 0 . 014 and 0 . 002 ± 0 . 247 ± 0 . 016, respectively. The results are consistent with Standard Model predictions.

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Contrôle bibliographique ouvert

DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.

Titre Crossref
Constraints on the photon polarisation in b → sγ transitions using $$ {B}_s^0 $$ → ϕe+e− decays
Date Crossref
07/03/2025
Éditeur
Springer Science and Business Media LLC
Type
journal-article

Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude et ne compte pas comme une seconde source scientifique indépendante.

Institutions déclarées

National Institute for Subatomic PhysicsUniversity of WarwickUniversity of ZurichUniversity of LiverpoolSyracuse UniversityUniversidade de Santiago de CompostelaUniversity of BristolUppsala UniversityCentre National de la Recherche ScientifiqueUniversité Paris-SaclayInstitut National de Physique Nucléaire et de Physique des ParticulesLaboratoire de Physique des 2 Infinis Irène Joliot-CurieUniversity of MichiganUniversité Clermont AuvergneLaboratoire de Physique de Clermont AuvergneUniversity of CincinnatiIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiTU Dortmund UniversityMachine Intelligence Research InstituteLamarr Institute for Machine Learning and Artificial IntelligenceEuropean Organization for Nuclear ResearchUniversity of GlasgowUniversity of ManchesterUniversity of CambridgeDélégation Paris 7Université Paris CitéSorbonne UniversitéSorbonne Paris CitéLaboratoire de Physique Nucléaire et de Hautes ÉnergiesUniversidade Federal do Rio de JaneiroPeking UniversityIstituto Nazionale di Fisica Nucleare, Sezione di FirenzeIstituto Nazionale di Fisica Nucleare, Sezione di FerraraIstituto Nazionale di Fisica Nucleare, Sezione di Milano BicoccaUniversity of Milano-BicoccaInstitute of High Energy PhysicsUniversity of Chinese Academy of SciencesUniversity of Rome Tor VergataIstituto Nazionale di Fisica Nucleare, Roma Tor VergataConsejo Nacional de RectoresAix-Marseille UniversitéCentre de physique des particules de MarseilleFZU ‒ Institute of Physics of the Academy of Sciences of the Czech RepublicÉcole Polytechnique Fédérale de LausanneMassachusetts Institute of TechnologyCommissariat à l'Énergie Atomique et aux Énergies AlternativesCEA Paris-Saclay - Etablissement de SaclayCEA Paris-SaclayInstitut de Recherche sur les Lois Fondamentales de l'UniversUniversity of OxfordUniversité Savoie Mont BlancHeidelberg UniversityÉcole PolytechniqueLaboratoire Leprince-RinguetPontifícia Universidade Católica do Rio de JaneiroIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of EdinburghRWTH Aachen UniversityJagiellonian UniversityAGH University of KrakowScuola Normale SuperioreIstituto Nazionale di Fisica Nucleare, Sezione di PisaCentro Brasileiro de Pesquisas FísicasIstituto Nazionale di Fisica Nucleare, Sezione di GenovaIstituto Nazionale di Fisica Nucleare, Sezione di Roma IUniversitat Ramon LlullIstituto Nazionale di Fisica Nucleare, Sezione di PadovaInstitute of Nuclear Physics, Polish Academy of SciencesImperial College LondonMaastricht UniversityUniversity of FerraraUniversity of PaduaUniversitat de BarcelonaIstituto Nazionale di Fisica Nucleare, Sezione di CagliariWuhan UniversityUniversity of BolognaUniversity of GenoaUniversity of MilanIstituto Nazionale di Fisica Nucleare, Sezione di MilanoInstitute for Nuclear ResearchUniversidade da CoruñaHoria Hulubei National Institute for R and D in Physics and Nuclear EngineeringIstituto Nazionale di Fisica Nucleare, Sezione di BariNational Autonomous University of HondurasLos Alamos National LaboratoryHunan UniversityState Key Laboratory of Nuclear Physics and TechnologyUniversity of CagliariUniversity of GroningenFederal Center for Technological Education Celso Suckow da FonsecaUniversity of Bari Aldo MoroAustralian Regenerative Medicine InstituteMonash UniversityCentral China Normal UniversityEötvös Loránd UniversityTsinghua UniversityUniversity College DublinSouth China Normal UniversityCracow University of TechnologyIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaRutherford Appleton LaboratoryUniversity of BonnMax Planck Institute for Nuclear PhysicsUniversity of PerugiaUniversitat de ValènciaInstituto de Física CorpuscularUniversity of Maryland, College ParkUniversity of FreiburgLIP6National Centre for Nuclear ResearchUniversity of PisaUniversity College of Applied ScienceUniversidad Nacional de ColombiaUniversity of BirminghamKharkiv Institute of Physics and TechnologyLanzhou UniversityHenan UniversityUniversity of BergamoRuhr University BochumUniversity of SienaUniversity of BasilicataUniversidad de AlcaláUniversity of Urbino

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Sujets associés

Particle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsDark Matter and Cosmic Phenomena

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