### Abstract

We present an analysis of the decays B^{0} → K^{∗0}(892)γ and B^{+} → K^{∗+}(892)γ using a sample of about 383 × 10^{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}γ = (4.47 ± 0.10 ± 0.16) × 10^{-5} and B(B^{+} → K^{∗+} γ) = (4.22 ± 0.14 ± 0.16) × 10^{-5}. We constrain the direct CP asymmetry to be -0.033 < A(B → K^{∗} γ) < 0.028 and the isospin asymmetry to be 0.017 < δ_{0-} < 0.116, where the limits are determined by the 90% confidence interval and include both the statistical and systematic uncertainties.

Original language | English (US) |
---|---|

Article number | 211802 |

Journal | Physical review letters |

Volume | 103 |

Issue number | 21 |

DOIs | |

State | Published - Nov 19 2009 |

### All Science Journal Classification (ASJC) codes

- Physics and Astronomy(all)

## Fingerprint Dive into the research topics of 'Measurement of B → K<sup>∗</sup>(892)γ Branching Fractions and CP and Isospin Asymmetries'. Together they form a unique fingerprint.

## Cite this

BABAR Collaboration (2009). Measurement of B → K

^{∗}(892)γ Branching Fractions and CP and Isospin Asymmetries.*Physical review letters*,*103*(21), [211802]. https://doi.org/10.1103/PhysRevLett.103.211802