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Measurement of B --> K-*(892)gamma Branching Fractions and CP and Isospin Asymmetries

Author(s)
Dujmic, Denis; Henderson, Shawn Wesley; Sciolla, Gabriella; Yamamoto, R. K.; Zhao, M.; Fisher, Peter H; Cowan, Ray F; Spitznagel, Michael A; ... Show more Show less
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Alternative title
Measurement of B -> K-*(892)γ Branching Fractions and CP and Isospin Asymmetries
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We present an analysis of the decays B0-->K*0(892)gamma and B+-->K*+(892)gamma using a sample of about 383×106 BB[over-bar] events collected with the BABAR detector at the PEP-II asymmetric energy B factory. We measure the branching fractions B(B0→K*0gamma)=(4.47±0.10±0.16)×10[superscript -5] and B(B+-->K*+gamma)=(4.22±0.14±0.16)×10[superscript -5]. We constrain the direct CP asymmetry to be -0.033<A(B-->K*gamma)<0.028 and the isospin asymmetry to be 0.017<Δ0-<0.116, where the limits are determined by the 90% confidence interval and include both the statistical and systematic uncertainties.
Date issued
2009-11
URI
http://hdl.handle.net/1721.1/57482
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Citation
BABAR Collaboration. "Measurement of B-->K-*(892)gamma Branching Fractions and CP and Isospin Asymmetries.” Phys. Rev. Lett. 103, 211802 (2009) ©2009 The American Physical Society.
Version: Final published version
ISSN
0031-9007

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