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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2003, vol. 91, p. 2616011-2616016

Observation of B → K*ℓ+ℓ-

Ishikawa A., Abe K., Abe K., Abe T., Adachi I., Ahn Byoung Sup, Aihara H., Akai K., Akatsu M., Akemoto M., Asano Y., Aso T., Aulchenko V., Aushev T., Bakich A. M., Ban Y., Bay A., Bizjak I., Bondar A., Bozek A., Bračko M., Browder T. E., Chang P., Chao Y., Chen K. F., Cheon B. G., Chistov R., Choi S. K., Choi Y., Choi Y. K., Chuvikov A., Danilov M., Dong L. Y., Drutskoy A., Eidelman S., Eiges V., Enari Y., Flanagan J., Fukunaga C., Funakoshi Y., Furukawa K., Gabyshev N., Garmash A., Gershon T., Golob B., Guo R., Haba J., Hagner C., Handa F., Hayashii H., Hazumi M., Hinz L., Hokuue T., Hoshi Y., Hou W. S., Hsiung Y. B., Huang H. C., Iijima T., Inami K., Itoh R., Iwasaki H., Iwasaki M., Iwasaki Y., Kang J. H., Kang J. S., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kikutani E., Kim H. J., Kim Hyunwoo, Kim J. H., Kim S. K., Kinoshita K., Koppenburg P., Korpar S., Križan P., Krokovny P., Kuzmin A., Kwon Y. J., Lange J. S., Leder G., Lee S. H., Lesiak T., Li J., Limosani A., Lin S. W., Liventsev D., MacNaughton J., Majumder G., Mandl F., Masuzawa M., Matsumoto T.

The observation of the flavor-changing neutral decay B → K*l+l- was reported. The branching fractions were calculated by assuming an equal production rate for charged and neutral B meson pairs. The measured branching fractions were found to be in agreement with the standard model predictions. The effect of systematic error was also included in the calculations.