We present an analysis of the decays B-0 -> K-*0(892)gamma and B+-> K*+(892)gamma using a sample of about 383x10(6) BB events collected with the BABAR detector at the PEP-II asymmetric energy B factory. We measure the branching fractions B(B-0 -> K-*0 gamma)=(4.47 +/- 0.10 +/- 0.16)x10(-5) and B(B+-> K*+gamma)=(4.22 +/- 0.14 +/- 0.16)x10(-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 < 0.116, where the limits are determined by the 90% confidence interval and include both the statistical and systematic uncertainties.

We present an analysis of the decays B-0 -> K-*0(892)gamma and B+-> K*+(892)gamma using a sample of about 383x10(6) BB events collected with the BABAR detector at the PEP-II asymmetric energy B factory. We measure the branching fractions B(B-0 -> K-*0 gamma)=(4.47 +/- 0.10 +/- 0.16)x10(-5) and B(B+-> K*+gamma)=(4.22 +/- 0.14 +/- 0.16)x10(-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 < 0.116, where the limits are determined by the 90% confidence interval and include both the statistical and systematic uncertainties.

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

Baracchini E;Ferroni F;
2009

Abstract

We present an analysis of the decays B-0 -> K-*0(892)gamma and B+-> K*+(892)gamma using a sample of about 383x10(6) BB events collected with the BABAR detector at the PEP-II asymmetric energy B factory. We measure the branching fractions B(B-0 -> K-*0 gamma)=(4.47 +/- 0.10 +/- 0.16)x10(-5) and B(B+-> K*+gamma)=(4.22 +/- 0.14 +/- 0.16)x10(-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 < 0.116, where the limits are determined by the 90% confidence interval and include both the statistical and systematic uncertainties.
We present an analysis of the decays B-0 -&gt; K-*0(892)gamma and B+-&gt; K*+(892)gamma using a sample of about 383x10(6) BB events collected with the BABAR detector at the PEP-II asymmetric energy B factory. We measure the branching fractions B(B-0 -&gt; K-*0 gamma)=(4.47 +/- 0.10 +/- 0.16)x10(-5) and B(B+-&gt; K*+gamma)=(4.22 +/- 0.14 +/- 0.16)x10(-5). We constrain the direct CP asymmetry to be -0.033 &lt; A(B -&gt; K-*gamma)&lt; 0.028 and the isospin asymmetry to be 0.017 &lt; 0.116, where the limits are determined by the 90% confidence interval and include both the statistical and systematic uncertainties.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12571/1393
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