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

et al; the BABAR Collaboration: B. Aubert

arxiv: 0906.2177 · v1 · submitted 2009-06-11 · ✦ hep-ex

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

the BABAR Collaboration: B. Aubert , et al This is my paper

classification ✦ hep-ex

keywords gammaasymmetrybranchingdecaysfractionsanalysisasymmetricasymmetries

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We present an analysis of the decays B0 -> K*0 gamma and B+ -> K*+ gamma using a sample of 383 million BBbar events collected with the BaBar detector at the PEP2 asymmetric energy B factory. We measure the branching fractions BF[B0 -> K*0 Gamma] = 4.47 +/- 0.10 +/- 0.16 x 10^-5 and BF[B+ -> K*+ Gamma] = 4.22 +/- 0.14 +/- 0.16 x 10^-5. We constrain the direct CP asymmetry to be -0.033 < Acp < 0.028 and the isopin asymmetry to be 0.017 < \Delta0- < 0.116, where the limits are determined at the 90% confidence interval and include both statistical systematic uncertainties.

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