Model-independent search for the decay B+-> l(+)nu(l)gamma

作者：Aubert B^*; Karyotakis Y; Lees J P; Poireau V; Prencipe E; Prudent X; Tisserand V; Tico J Garra; Grauges E; Martinelli M; Palano A; Pappagallo M; Eigen G; Stugu B; Sun L; Battaglia M; Brown D N; Kerth L T; Kolomensky Yu G; Lynch G; Osipenkov I L; Tackmann K; Tanabe T; Hawkes C M; Soni N; Watson A T; Koch H; Schroeder T; Asgeirsson D J; Fulsom B G; Hearty C; Mattison T S; McKenna J A; Barrett M; Khan A

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2009, 80(11): 111105.

DOI：10.1103/PhysRevD.80.111105

We present a search for the radiative leptonic decay B+-> l(+)nu(l)gamma, where l=e, mu, using a data sample of 465x10(6) BB pairs collected by the BABAR experiment. In this analysis, we fully reconstruct the hadronic decay of one of the B mesons in Upsilon(4S)-> B+B- decays, then search for evidence of B+-> l(+)nu(l)gamma in the rest of the event. We observe no significant evidence of signal decays and report model-independent branching fraction upper limits of B(B+-> e(+)nu(e)gamma)< 17x10(-6), B(B+->mu(+)nu(mu)gamma)< 24x10(-6), and B(B+-> l(+)nu(l)gamma)< 15.6x10(-6) (l=e or mu), all at the 90% confidence level.

• 出版日期2009-12
• 单位中国地震局