학술논문
Exclusive measurements of b→sγ transition rate and photon energy spectrum
Document Type
article
Author
Lees, JP; Poireau, V; Tisserand, V; Garra Tico, J; Grauges, E; Palano, A; Eigen, G; Stugu, B; Brown, DN; Kerth, LT; Kolomensky, YG; Lynch, G; Koch, H; Schroeder, T; Asgeirsson, DJ; Hearty, C; Mattison, TS; McKenna, JA; Khan, A; Blinov, VE; Buzykaev, AR; Druzhinin, VP; Golubev, VB; Kravchenko, EA; Onuchin, AP; Serednyakov, SI; Skovpen, YI; Solodov, EP; Todyshev, KY; Yushkov, AN; Bondioli, M; Kirkby, D; Lankford, AJ; Mandelkern, M; Atmacan, H; Gary, JW; Liu, F; Long, O; Vitug, GM; Campagnari, C; Hong, TM; Kovalskyi, D; Richman, JD; West, CA; Eisner, AM; Kroseberg, J; Lockman, WS; Martinez, AJ; Schumm, BA; Seiden, A; Chao, DS; Cheng, CH; Doll, DA; Echenard, B; Flood, KT; Hitlin, DG; Ongmongkolkul, P; Porter, FC; Rakitin, AY; Andreassen, R; Huard, Z; Meadows, BT; Sokoloff, MD; Sun, L; Bloom, PC; Ford, WT; Gaz, A; Nauenberg, U; Smith, JG; Wagner, SR; Ayad, R; Toki, WH; Spaan, B; Schubert, KR; Schwierz, R; Bernard, D; Verderi, M; Clark, PJ; Playfer, S; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Fioravanti, E; Garzia, I; Luppi, E; Munerato, M; Negrini, M; Piemontese, L; Santoro, V; Baldini-Ferroli, R; Calcaterra, A; De Sangro, R; Finocchiaro, G; Patteri, P; Peruzzi, IM; Piccolo, M; Rama, M; Zallo, A; Contri, R
Source
Physical Review D - Particles, Fields, Gravitation and Cosmology. 86(5)
Subject
Language
Abstract
We use 429fb -1 of e +e - collision data collected at the Υ(4S) resonance with the BABAR detector to measure the radiative transition rate of b→sγ with a sum of 38 exclusive final states. The inclusive branching fraction with a minimum photon energy of 1.9 GeV is found to be B(B̄→X sγ)=(3.29±0.19±0. 48)×10 -4 where the first uncertainty is statistical and the second is systematic. We also measure the first and second moments of the photon energy spectrum and extract the best-fit values for the heavy-quark parameters, m b and μπ2, in the kinetic and shape function models. © 2012 American Physical Society.