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

Дата
2021
Авторы
Beleno, C.
Frey, A.
Adachi, I.
Aihara, H.
Pakhlov, P.
Journal Title
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Издатель
Научные группы
Логотип проекта
Научная группа
Belle Collaboration
Организационные подразделения
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Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
Выпуск журнала
Аннотация
We 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.
Описание
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Цитирование
Measurement 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
URI
https://www.doi.org/10.1103/PhysRevD.103.112001
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85108893900&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000657143200001
 https://openrepository.mephi.ru/handle/123456789/24237
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