Exclusive Measurements of b → sγ Transition Rate and Photon Energy Spectrum

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Exclusive Measurements of b → sγ Transition Rate and Photon Energy Spectrum

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Title: Exclusive Measurements of b → sγ Transition Rate and Photon Energy Spectrum
Author(s):
Lees, J. P.;
Poireau, V.;
Tisserand, V.;
Garra Tico, J.;
Grauges, E.;
Palano, A.;
Eigen, G.;
Izen, Joseph M.;
Lou, Xinchou;
BaBar Collaboration
Date Created: 2012-10-17
Copyright Date: 2012-10-17
Format: Text
Article
Keywords: Standard model (Nuclear physics)
BABAR Collaboration
Branching fractions (Nuclear physics)
Photons
Abstract: We use 429 fb⁻¹ of e⁺e⁻ collision data collected at the Υ(4S) resonance with the BABAR detector to measure the radiative transition rate of b → sγ 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(B̅ → Χ_sγ) = (3.29 ± 0.19 ± 0.48) x 10⁻⁴ 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, m_b and μ_π², in the kinetic and shape function models.
Language: English
Publisher: American Physical Society
ISSN: 1550-7998
Source: Physical Review Letters
Link to Related Resource: http://dx.doi.org/10.1103/PhysRevD.86.052012
Persistent Link: http://hdl.handle.net/10735.1/2306
Bibliographic Citation: Lees, J. P., V. Poireau, V. Tisserand, J. Garra Tico, E. Grauges, A. Palano, G. Eigen, et al. 2012. "Exclusive measurements of b → sγ transition rate and photon energy spectrum." Physical Review D 86(5), doi:10.1103/PhysRevD.86.052012
Terms of Use: © 2012, American Physical Society

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