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Measurement of the branching fraction of the decay B+ -> pi(+) pi(-) l(+) nu(l) in fully reconstructed events at Belle

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dc.contributor.authorBeleno, C.
dc.contributor.authorFrey, A.
dc.contributor.authorAdachi, I.
dc.contributor.authorAihara, H.
dc.contributor.authorPakhlov, P.
dc.date.accessioned2024-11-29T16:40:35Z
dc.date.available2024-11-29T16:40:35Z
dc.date.issued2021
dc.description.abstractWe present an analysis of the exclusive B+ -> pi(+) pi(-) l(+) nu(l) decay, where l represents an electron or a muon, with the assumption of charge-conjugation symmetry and lepton universality. The study exploits the full gamma (4S) data sample collected by the Belle detector, corresponding to 711 fb(-1) of integrated luminosity. Events are selected by fully reconstructing one B meson in hadronic decay modes, subsequently determining the properties of the other B meson. We extract the signal yields using a binned maximum-likelihood fit to the missing-mass squared distribution in bins of the invariant mass of the two pions or the momentum transfer squared. We measure a total branching fraction of B(B+ -> pi(+) pi(-) l(+) nu(l)) = [22.7(-1.6)(+1.9) (stat) +/- 3.5(syst) x 10(-5), where the uncertainties are statistical and systematic, respectively. This result is the first reported measurement of this decay.
dc.identifier.citationMeasurement of the branching fraction of the decay B+ -> pi(+) pi(-) l(+) nu(l) in fully reconstructed events at Belle / Beleno, C [et al.] // Physical Review D. - 2021. - 103. - № 11. - 10.1103/PhysRevD.103.112001
dc.identifier.doi10.1103/PhysRevD.103.112001
dc.identifier.urihttps://www.doi.org/10.1103/PhysRevD.103.112001
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85108893900&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000657143200001
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/24237
dc.relation.ispartofPhysical Review D
dc.titleMeasurement of the branching fraction of the decay B+ -> pi(+) pi(-) l(+) nu(l) in fully reconstructed events at Belle
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue11
oaire.citation.volume103
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