Measurement of the ratio B(B+→Xeν)/B(B0→Xeν)

B. Aubert, J.Y. Chen, K. Peters, L.L. Zhang, S. Chen, W. Wang, X.H. Li, M.A. Baak, G. Raven, H. Snoek, P. David, H. Schroder, N. de Groot, H. Liu, N. van Bakel, Z. Yu

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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).
Original languageEnglish
Article number091105(R)
JournalPhysical Review D
Issue number9
Publication statusPublished - 1 Nov 2006

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Measurement of the ratio B(B+-> Xev)/B(B-0 -> Xev)


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