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Accès ouvert déclaré 2020 article

First Observation of Excited Ω_{b}^{-} States.

0Citations signalées, ce qui n’est pas une note de qualité
90Institutions déclarées
17Pays d’affiliation déclarés

Rattachement africain : nl, ch, gb, es, fr, us, it, de, ru, br, pl, cn, ro, ua, au, ie, co. Niveau de preuve : code pays fourni par la source.

Le résumé fourni par la source

We report four narrow peaks in the Ξ_{b}^{0}K^{-} mass spectrum obtained using pp collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb^{-1} recorded by the LHCb experiment. Referring to these states by their mass, the mass values are m[Ω_{b}(6316)^{-}]=6315.64±0.31±0.07±0.50 MeV, m[Ω_{b}(6330)^{-}]=6330.30±0.28±0.07±0.50 MeV, m[Ω_{b}(6340)^{-}]=6339.71±0.26±0.05±0.50 MeV, m[Ω_{b}(6350)^{-}]=6349.88±0.35±0.05±0.50 MeV, where the uncertainties are statistical, systematic, and the last is due to the knowledge of the Ξ_{b}^{0} mass. The natural widths of the three lower mass states are consistent with zero, and the 90% confidence-level upper limits are determined to be Γ[Ω_{b}(6316)^{-}]<2.8 MeV, Γ[Ω_{b}(6330)^{-}]<3.1 MeV and Γ[Ω_{b}(6340)^{-}]<1.5 MeV. The natural width of the Ω_{b}(6350)^{-} peak is 1.4_{-0.8}^{+1.0}±0.1 MeV, which is 2.5σ from zero and corresponds to an upper limit of 2.8 MeV. The peaks have local significances ranging from 3.6σ to 7.2σ. After accounting for the look-elsewhere effect, the significances of the Ω_{b}(6316)^{-} and Ω_{b}(6330)^{-} peaks are reduced to 2.1σ and 2.6σ, respectively, while the two higher mass peaks exceed 5σ. The observed peaks are consistent with expectations for excited Ω_{b}^{-} resonances.

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Le contrôle bibliographique ouvert

DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.

Titre Crossref
First Observation of Excited <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msubsup> <mml:mrow> <mml:mi mathvariant="normal">Ω</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>b</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> </mml:mrow> </mml:msubsup> </mml:mrow> </mml:math> States
Date Crossref
25/02/2020
Éditeur
American Physical Society (APS)
Type
journal-article

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

Les institutions déclarées

National Institute for Subatomic PhysicsUniversity of ZurichUniversity of LiverpoolUniversidade de Santiago de CompostelaUniversity of BristolCentre National de la Recherche ScientifiqueUniversité Clermont AuvergneInstitut National de Physique Nucléaire et de Physique des ParticulesUniversity of MichiganSyracuse UniversityIstituto Nazionale di Fisica Nucleare, Sezione di MilanoLos Alamos National LaboratoryIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiTU Dortmund UniversityEuropean Organization for Nuclear ResearchUniversity of GlasgowUniversitat de BarcelonaPetersburg Nuclear Physics InstituteImperial College LondonUniversidade Federal do Rio de JaneiroUniversité Paris-SudUniversité Paris-SaclayIstituto Nazionale di Fisica Nucleare, Sezione di FirenzeÉcole Polytechnique Fédérale de LausanneIstituto Nazionale di Fisica Nucleare, Sezione di FerraraHeidelberg UniversityAix-Marseille UniversitéCentre de physique des particules de MarseilleKurchatov InstituteInstitute for High Energy PhysicsYandex School of Data AnalysisIstituto Nazionale di Fisica Nucleare, Sezione di CagliariUniversity of WarwickUniversity of ManchesterIstituto Nazionale di Fisica Nucleare, Sezione di GenovaNational University of Science and TechnologyIstituto Nazionale di Fisica Nucleare, Sezione di PisaNational Centre for Nuclear ResearchCentro Brasileiro de Pesquisas FísicasDélégation Paris 7Université Paris CitéSorbonne UniversitéSorbonne Paris CitéLaboratoire de Physique Nucléaire et de Hautes ÉnergiesRWTH Aachen UniversityLomonosov Moscow State UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PadovaIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of CambridgeInstitute of Nuclear Physics, Polish Academy of SciencesUniversity of BirminghamUniversity of OxfordIstituto Nazionale di Fisica Nucleare, Sezione di Roma IMassachusetts Institute of TechnologyNational Research University Higher School of EconomicsSiberian Branch of the Russian Academy of SciencesBudker Institute of Nuclear PhysicsWuhan UniversityTsinghua UniversityIstituto Nazionale di Fisica Nucleare, Sezione di Milano BicoccaIstituto Nazionale di Fisica Nucleare, Roma Tor VergataUniversité Savoie Mont BlancUniversité Grenoble AlpesUniversity of EdinburghHoria Hulubei National Institute for R and D in Physics and Nuclear EngineeringIstituto Nazionale di Fisica Nucleare, Sezione di BariMax Planck Institute for Nuclear PhysicsAGH University of KrakowCentral China Normal UniversityInstitute for Nuclear ResearchKharkiv Institute of Physics and TechnologyRutherford Appleton LaboratoryMonash UniversityInstitute for Nuclear ResearchUniversity of Maryland, College ParkPeking UniversityState Key Laboratory of Nuclear Physics and TechnologyUniversitat de ValènciaInstituto de Física CorpuscularPontifícia Universidade Católica do Rio de JaneiroInstitute of High Energy PhysicsUniversity of Chinese Academy of SciencesNational Research Tomsk State UniversityTomsk Polytechnic UniversitySouth China Normal UniversityUniversity College DublinUniversity of CincinnatiUniversity of RostockUniversidad Nacional de ColombiaUniversity of Groningen

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Les sujets associés

Laser-Matter Interactions and ApplicationsCold Atom Physics and Bose-Einstein CondensatesQuantum Chromodynamics and Particle Interactions

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