Evidence for penguin-diagram decays: First observation of B -> K*(892)gamma
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Issue Date
1993-08Author
Ammar, Raymond G.
Ball, S.
Baringer, Philip S.
Coppage, Don
Copty, N.
Davis, Robin E. P.
Hancock, N.
Kelly, M.
Kwak, Nowhan
Lam, H.
Publisher
AMERICAN PHYSICAL SOC
Type
Article
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Show full item recordAbstract
We have observed the decays B0 --> K*(892)0gamma and B- --> K*(892)-gamma, which are evidence for the quark-level process b --> sgamma. The average branching fraction is (4.5 +/- 1.5 +/- 0.9) x 10(-5). This value is consistent with standard model predictions from electromagnetic penguin diagrams.
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Citation
AMMAR, R, BALL, S, et al. EVIDENCE FOR PENGUIN-DIAGRAM DECAYS - 1ST OBSERVATION OF B -] K-ASTERISK(892)GAMMA. PHYSICAL REVIEW LETTERS. August 1993. 71(5) : 674-678
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