학술논문
Measurement of B→Xγ Decays and Determination of |Vtd/Vts|
Document Type
article
Author
Aubert, B; Bona, M; Karyotakis, Y; Lees, JP; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V; Tico, J Garra; Grauges, E; Lopez, L; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Abrams, GS; Battaglia, M; Brown, DN; Cahn, RN; Jacobsen, RG; Kerth, LT; Kolomensky, Yu G; Lynch, G; Osipenkov, IL; Ronan, MT; Tackmann, K; Tanabe, T; Hawkes, CM; Soni, N; Watson, AT; Koch, H; Schroeder, T; Walker, D; Asgeirsson, DJ; Fulsom, BG; Hearty, C; Mattison, TS; McKenna, JA; Barrett, M; Khan, A; Blinov, VE; Bukin, AD; Buzykaev, AR; Druzhinin, VP; Golubev, VB; Onuchin, AP; Serednyakov, SI; Skovpen, Yu I; Solodov, EP; Todyshev, K Yu; Bondioli, M; Curry, S; Eschrich, I; Kirkby, D; Lankford, AJ; Lund, P; Mandelkern, M; Martin, EC; Stoker, DP; Abachi, S; Buchanan, C; Gary, JW; Liu, F; Long, O; Shen, BC; Vitug, GM; Yasin, Z; Zhang, L; Sharma, V; Campagnari, C; Hong, TM; Kovalskyi, D; Mazur, MA; Richman, JD; Beck, TW; Eisner, AM; Flacco, CJ; Heusch, CA; Kroseberg, J; Lockman, WS; Martinez, AJ; Schalk, T; Schumm, BA; Seiden, A; Wilson, MG; Winstrom, LO; Cheng, CH; Doll, DA; Echenard, B; Fang, F; Hitlin, DG; Narsky, I; Piatenko, T; Porter, FC; Andreassen, R; Mancinelli, G; Meadows, BT; Mishra, K; Sokoloff, MD
Source
Physical Review Letters. 102(16)
Subject
Language
Abstract
Using a sample of 383 x 10;{6} BB[over ] events collected by the BABAR experiment, we measure sums of seven exclusive final states B-->X_{d(s)}gamma, where X_{d}(X_{s}) is a nonstrange (strange) charmless hadronic system in the mass range 0.6-1.8 GeV/c;{2}. After correcting for unmeasured decay modes in this mass range, we obtain a branching fraction for b-->dgamma of (7.2+/-2.7(stat)+/-2.3(syst))x10;{-6}. Taking the ratio of X_{d} to X_{s} we find Gamma(b-->dgamma)/Gamma(b-->sgamma)=0.033+/-0.013(stat)+/-0.009(syst), from which we determine |V_{td}/V_{ts}|=0.177+/-0.043.