Exclusive measurements of bsγ transition rate and photon energy spectrum

J. P. Lees et al. (BABAR Collaboration)
Phys. Rev. D 86, 052012 – Published 26 September 2012

Abstract

We use 429fb1 of e+e collision data collected at the Υ(4S) resonance with the BABAR detector to measure the radiative transition rate of bsγ with a sum of 38 exclusive final states. The inclusive branching fraction with a minimum photon energy of 1.9 GeV is found to be B(B¯Xsγ)=(3.29±0.19±0.48)×104 where the first uncertainty is statistical and the second is systematic. We also measure the first and second moments of the photon energy spectrum and extract the best-fit values for the heavy-quark parameters, mb and μπ2, in the kinetic and shape function models.

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  • Received 11 July 2012

DOI:https://doi.org/10.1103/PhysRevD.86.052012

© 2012 American Physical Society

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Vol. 86, Iss. 5 — 1 September 2012

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