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First observation of the radiative decay Λb0 → Λγ

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dc.contributor.authorLHCb Collaboration
dc.contributor.authorAlfonso Albero, Alejandro
dc.contributor.authorCalvo Gómez, Míriam
dc.contributor.authorCamboni, Alessandro
dc.contributor.authorCoquereau, Samuel
dc.contributor.authorGarrido Beltrán, Lluís
dc.contributor.authorGascón Fora, David
dc.contributor.authorGironella Gironell, P.
dc.contributor.authorGraciani Díaz, Ricardo
dc.contributor.authorGraugés Pous, Eugeni
dc.contributor.authorVilasis-Cardona, Xavier
dc.contributor.authorMarin Benito, Carla
dc.date.accessioned2020-05-25T07:43:53Z
dc.date.available2020-05-25T07:43:53Z
dc.date.issued2019-07-15
dc.date.updated2020-05-25T07:43:53Z
dc.description.abstractThe radiative decay Λb0→Λγ is observed for the first time using a data sample of proton-proton collisions corresponding to an integrated luminosity of 1.7 fb-1 collected by the LHCb experiment at a center-of-mass energy of 13 TeV. Its branching fraction is measured exploiting the B0→K∗0γ decay as a normalization mode and is found to be B(Λb0→Λγ)=(7.1±1.5±0.6±0.7)×10-6, where the quoted uncertainties are statistical, systematic, and systematic from external inputs, respectively. This is the first observation of a radiative decay of a beauty baryon.
dc.format.extent11 p.
dc.format.mimetypeapplication/pdf
dc.identifier.idgrec696367
dc.identifier.issn0031-9007
dc.identifier.urihttps://hdl.handle.net/2445/162199
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.123.031801
dc.relation.ispartofPhysical Review Letters, 2019, vol. 123, num. 3, p. 031801-031801
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/792684/EU//pANUCSTR
dc.relation.urihttps://doi.org/10.1103/PhysRevLett.123.031801
dc.rights(c) American Physical Society, 2019
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.sourceArticles publicats en revistes (Física Quàntica i Astrofísica)
dc.subject.classificationFísica de partícules
dc.subject.classificationExperiments
dc.subject.otherParticle physics
dc.subject.otherExperiments
dc.titleFirst observation of the radiative decay Λb0 → Λγ
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion

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