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

Authors:Babar Collaboration
Azzolini, Virginia
López-March, Neus
Martínez-Vidal, Fernando
Milanés, Diego A.
Oyanguren, Arantza
Aubert, B.
Issue Date:20-Nov-2009
Publisher:American Physical Society
Citation:Physical Review Letters 103 (21): 211802 (2009)
Abstract: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.
Publisher version (URL):http://dx.doi.org/ 10.1103/PhysRevLett.103.211802
Appears in Collections:(IFIC) Artículos

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