학술논문
Observation of the Decay B-→Ds(*)+K-ℓ-ν¯ℓ
Document Type
article
Author
del Amo Sanchez, P; Lees, JP; Poireau, V; Prencipe, E; Tisserand, V; Tico, J Garra; Grauges, E; Martinelli, M; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Battaglia, M; Brown, DN; Hooberman, B; Kerth, LT; Kolomensky, Yu G; Lynch, G; Osipenkov, IL; Tanabe, T; Hawkes, CM; Watson, AT; Koch, H; Schroeder, T; Asgeirsson, DJ; Hearty, C; Mattison, TS; McKenna, JA; Khan, A; Randle-Conde, A; Blinov, VE; Buzykaev, AR; Druzhinin, VP; Golubev, VB; Onuchin, AP; Serednyakov, SI; Skovpen, Yu I; Solodov, EP; Todyshev, K Yu; Yushkov, AN; Bondioli, M; Curry, S; Kirkby, D; Lankford, AJ; Mandelkern, M; Martin, EC; Stoker, DP; Atmacan, H; Gary, JW; Liu, F; Long, O; Vitug, GM; Campagnari, C; Hong, TM; Kovalskyi, D; Richman, JD; Eisner, AM; Heusch, CA; Kroseberg, J; Lockman, WS; Martinez, AJ; Schalk, T; Schumm, BA; Seiden, A; Winstrom, LO; Cheng, CH; Doll, DA; Echenard, B; Hitlin, DG; Ongmongkolkul, P; Porter, FC; Rakitin, AY; Andreassen, R; Dubrovin, MS; Mancinelli, G; Meadows, BT; Sokoloff, MD; Bloom, PC; Ford, WT; Gaz, A; Nagel, M; Nauenberg, U; Smith, JG; Wagner, SR; Ayad, R; Toki, WH; Jasper, H; Karbach, TM; Merkel, J; Petzold, A; Spaan, B; Wacker, K; Kobel, MJ; Schubert, KR; Schwierz, R; Bernard, D; Verderi, M; Clark, PJ; Playfer, S
Source
Physical Review Letters. 107(4)
Subject
Language
Abstract
We report the observation of the decay B- → D(s)((*)+) K- ℓ- ν(ℓ) based on 342 fb(-1) of data collected at the Υ(4S) resonance with the BABAR detector at the PEP-II e+ e- storage rings at SLAC. A simultaneous fit to three D(s)(+) decay chains is performed to extract the signal yield from measurements of the squared missing mass in the B meson decay. We observe the decay B- → D(s)((*)+) K- ℓ- ν(ℓ) with a significance greater than 5 standard deviations (including systematic uncertainties) and measure its branching fraction to be B(B- → D(s)((*)+) K- ℓ- ν(ℓ)) = [6.13(-1.03)(+1.04)(stat)±0.43(syst)±0.51(B(D(s)))]×10(-4), where the last error reflects the limited knowledge of the D(s) branching fractions.