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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Measurement of B -> K-*(892)γ Branching Fractions and CP and Isospin Asymmetries
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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.
DepartmentMassachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
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.
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