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Measurement of forward-backward asymmetry and Wilson coefficients in B --> K*l+l- |
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| Authors: | Ishikawa A Abe K Adachi I Aihara H Anipko D Asano Y Aushev T Bakich A M Balagura V Barbero M Bitenc U Bizjak I Blyth S Bondar A Bozek A Bracko M Browder T E Chang P Chao Y Chen A Cheon B G Choi Y Choi Y K Chuvikov A Dalseno J Danilov M Dash M Drutskoy A Eidelman S Fratina S Gabyshev N Gershon T Gokhroo G Golob B Gorisek A Ha H Haba J Hara T Hayasaka K Hayashii H Hazumi M Hinz L Hokuue T Hoshi Y Hou S Hou W-S Hsiung Y B Iijima T Ikado K Inami K Ishino H Itoh R Iwasaki M Iwasaki Y Kang J H Kataoka S U Katayama N Kawai H Kawasaki T Khan H R Kichimi H Kim S K Kim S M Kinoshita K Korpar S Krizan P |
| Affiliation: | Department of Physics, University of Tokyo, Tokyo. |
| Abstract: | We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients and in A9/A7 and A10/A7 in B --> K*l+l-, where l represents an electron or a muon. We find evidence for the forward-backward asymmetry with a significance of 3.4sigma. The results are obtained from a data sample containing 386 x 10(6) BB pairs that were collected on the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. |
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