학술논문
Search for B+→τ+ν
Document Type
article
Author
Aubert, B; Bona, M; Boutigny, D; Karyotakis, Y; Lees, JP; Poireau, V; Prudent, X; Tisserand, V; Zghiche, A; Garra Tico, J; Grauges, E; Lopez, L; Palano, A; Eigen, G; Stugu, B; Sun, L; Abrams, GS; Battaglia, M; Brown, DN; Button-Shafer, J; Cahn, RN; Groysman, Y; Jacobsen, RG; Kadyk, JA; Kerth, LT; Kolomensky, YG; Kukartsev, G; Lopes Pegna, D; Lynch, G; Mir, LM; Orimoto, TJ; Ronan, MT; Tackmann, K; Wenzel, WA; Del Amo Sanchez, P; Hawkes, CM; Watson, AT; Held, T; Koch, H; Lewandowski, B; Pelizaeus, M; Schroeder, T; Steinke, M; Walker, D; Asgeirsson, DJ; Cuhadar-Donszelmann, T; Fulsom, BG; Hearty, C; Mattison, TS; McKenna, JA; Khan, A; Saleem, M; Teodorescu, L; Blinov, VE; Bukin, AD; Druzhinin, VP; Golubev, VB; Onuchin, AP; Serednyakov, SI; Skovpen, YI; Solodov, EP; Todyshev, KY; Bondioli, M; Curry, S; Eschrich, I; Kirkby, D; Lankford, AJ; Lund, P; Mandelkern, M; Martin, EC; Stoker, DP; Abachi, S; Buchanan, C; Foulkes, SD; Gary, JW; Liu, F; Long, O; Shen, BC; Zhang, L; Paar, HP; Rahatlou, S; Sharma, V; Berryhill, JW; Campagnari, C; Cunha, A; Dahmes, B; Hong, TM; Kovalskyi, D; Richman, JD; Beck, TW; Eisner, AM; Flacco, CJ; Heusch, CA; Kroseberg, J; Lockman, WS; Schalk, T; Schumm, BA; Seiden, A; Williams, DC; Wilson, MG
Source
Physical Review D - Particles, Fields, Gravitation and Cosmology. 76(5)
Subject
Language
Abstract
We present a search for the decay B+→τ+ν using 383×106BB̄ pairs collected at the Υ(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed semileptonic B decay (B-→D0 -ν̄ X) is selected, and in the recoil a search for B+→τ+ν is performed. The τ is identified in the following channels: τ+→e+νν̄, τ+→μ+νν̄, τ+→π+ν̄, and τ+→π+π0ν̄. We measure a branching fraction of B(B+→τ+ν)=(0.9±0.6(stat.)±0.1(syst.))×10-4. In the absence of a significant signal, we calculate an upper limit at the 90% confidence level of B(B+→τ+ν)