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Measurement of the B+ → ωℓ+ν branching fraction with semileptonically tagged B mesons

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dc.contributor.authorGraugés Pous, Eugeni
dc.contributor.authorBABAR Collaboration
dc.date.accessioned2019-04-08T11:31:54Z
dc.date.available2019-04-08T11:31:54Z
dc.date.issued2013-10-15
dc.date.updated2019-04-08T11:31:54Z
dc.description.abstractWe report a measurement of the branching fraction of the exclusive charmless semileptonic decay B + → ω ℓ + ν , where ℓ is either an electron or a muon. We use samples of B + mesons tagged by a reconstructed charmed semileptonic decay of the other B meson in the event. The measurement is based on a data set of 426.1     fb − 1 of e + e − collisions at a center-of-mass energy of 10.58 GeV recorded with the BABAR detector at the PEP-II asymmetric-energy e + e − storage rings. We measure a branching fraction of B ( B + → ω ℓ + ν ) = ( 1.35 ± 0.21 ± 0.11 ) × 10 − 4 , where the uncertainties are statistical and systematic, respectively. We also present measurements of the partial branching fractions in three bins of q 2 , the invariant-mass squared of the lepton-neutrino system, and we compare them to theoretical predictions of the form factors.
dc.format.extent9 p.
dc.format.mimetypeapplication/pdf
dc.identifier.idgrec629034
dc.identifier.issn1550-7998
dc.identifier.urihttps://hdl.handle.net/2445/131779
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.1103/PhysRevD.88.072006
dc.relation.ispartofPhysical Review D, 2013, vol. 88, num. 7, p. 072006
dc.relation.urihttps://doi.org/10.1103/PhysRevD.88.072006
dc.rights(c) American Physical Society, 2013
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.classificationMesuraments físics
dc.subject.otherParticle physics
dc.subject.otherExperiments
dc.subject.otherPhysical measurements
dc.titleMeasurement of the B+ → ωℓ+ν branching fraction with semileptonically tagged B mesons
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion

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