# A measurement of the branching fraction of the exclusive decay $B^{0} \to K^{*0}\gamma$

Abstract : The b --> s gamma transition proceeds by a loop penguin'' diagram. It may be used to measure precisely the couplings of the top quark and to search for the effects of any new particles appearing in the loop. We present a preliminary measurement of the branching fraction of the exclusive decay, B^0 --> K^{*0}gamma. We use 8.6 x 10^6 B-anti-B decays to measure B(B^0 --> K^{*0}gamma) = (5.4+/-0.8+/-0.5) x 10^{-5}.
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http://hal.in2p3.fr/in2p3-00006096
Contributor : Claudine Bombar <>
Submitted on : Tuesday, September 19, 2000 - 3:49:04 PM
Last modification on : Saturday, December 19, 2020 - 11:32:02 AM

### Citation

B. Aubert, A. Boucham, D. Boutigny, I. de Bonis, J. Favier, et al.. A measurement of the branching fraction of the exclusive decay $B^{0} \to K^{*0}\gamma$. International Conference on High-Energy Physics 30 ICHEP 2000, Jul 2000, Osaka, Japan. pp.1-17. ⟨in2p3-00006096⟩

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