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Measurement of the ratio B(B+→Xeν)/B(B0→Xeν)
- Author(s): Aubert, B
- Bona, M
- Boutigny, D
- Couderc, F
- Karyotakis, Y
- Lees, JP
- Poireau, V
- Tisserand, V
- Zghiche, A
- Grauges, E
- Palano, A
- Chen, JC
- Qi, ND
- Rong, G
- Wang, P
- Zhu, YS
- Eigen, G
- Ofte, I
- Stugu, B
- Abrams, GS
- Battaglia, M
- Brown, DN
- Button-Shafer, J
- Cahn, RN
- Charles, E
- Gill, MS
- Groysman, Y
- Jacobsen, RG
- Kadyk, JA
- Kerth, LT
- Kolomensky, YG
- Kukartsev, G
- Lynch, G
- Mir, LM
- Orimoto, TJ
- Pripstein, M
- Roe, NA
- Ronan, MT
- Wenzel, WA
- Del Amo Sanchez, P
- Barrett, M
- Ford, KE
- Hart, AJ
- Harrison, TJ
- Hawkes, CM
- Watson, AT
- Held, T
- Koch, H
- Lewandowski, B
- Pelizaeus, M
- Peters, K
- Schroeder, T
- Steinke, M
- Boyd, JT
- Burke, JP
- Cottingham, WN
- Walker, D
- Asgeirsson, DJ
- Cuhadar-Donszelmann, T
- Fulsom, BG
- Hearty, C
- Knecht, NS
- Mattison, TS
- McKenna, JA
- Khan, A
- Kyberd, P
- Saleem, M
- Sherwood, DJ
- Teodorescu, L
- Blinov, VE
- Bukin, AD
- Druzhinin, VP
- Golubev, VB
- Onuchin, AP
- Serednyakov, SI
- Skovpen, YI
- Solodov, EP
- Todyshev, KY
- Bondioli, M
- Bruinsma, M
- Chao, M
- Curry, S
- Eschrich, I
- Kirkby, D
- Lankford, AJ
- Lund, P
- Mandelkern, M
- Mommsen, RK
- Roethel, W
- Stoker, DP
- Abachi, S
- Buchanan, C
- Foulkes, SD
- Gary, JW
- Long, O
- Shen, BC
- Wang, K
- Zhang, L
- Hadavand, HK
- Hill, EJ
- et al.
Abstract
We report measurements of the inclusive electron momentum spectra in decays of charged and neutral B mesons, and of the ratio of semileptonic branching fractions B(B+→Xeν) and B(B0→Xeν). These were performed on a sample of 231×106 BB̄ events recorded with the BABAR detector at the Υ(4S) resonance. Events are selected by fully reconstructing a hadronic decay of one B meson and identifying an electron among the decay products of the recoiling B̄ meson. We obtain B(B+→Xeν)/B(B0→Xeν)=1. 074±0.041(stat)±0.026(syst). © 2006 The American Physical Society.
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