Measurement of the Decay B- --> D*0 e- nubar

2007/07/18 by The BABAR Collaboration, B. Aubert, Aubert, B.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.0707.2655

8 pages, 2 postscript figures, submitted to EPS2007

arxiv created 2007/07/18 · arxiv updated 2009/12/01

Abstract

Using 226 million BB events recorded on the Υ(4S) resonance with the BABAR detector at the SLAC e⁺e^- storage rings PEPII, we reconstruct B^-→ D^*0 e^-ν_e decays using the decay chain D^*0→D⁰π⁰ and D⁰→K^-π⁺. From the dependence of their differential rate on w, the product of the four-velocities of B^- and D^*0, and using the description of the form factor F(w) by Caprini et al., we obtain the preliminary results ρ²_A1 = 1.15± 0.06 ± 0.08, F(1)⋅|V_cb| = (36.3± 0.6 ± 1.4)⋅ 10^-3, and \cal B(B^-→ D^*0 e^-ν_e) = (5.71± 0.08± 0.41)%. The first errors are statistical and the second ones are systematic.

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