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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2003, vol. 91, p. 2616021-2616026

Measurement of Time-Dependent CP-Violating Asymmetries in B0 → φ Ks 0, K+K- K s 0 and η′ Ks 0 Decays

Abe K., Abe K., Abe T., Adachi I., Aihara H., Akai K., Akatsu M., Asano Y., Aso T., Aushev T., Bahinipati S., Bakich A. M., Ban Y., Banerjee S., Bedny I., Bizjak I., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chang M. C., 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., Eidelman S., Eiges V., Enari Y., Flanagan J., Fukunaga C., Furukawa K., Gabyshev N., Garmash A., Gershon T., Golob B., Guo R., Haba J., Hagner C., Hara K., Hara T., Hastings N. C., Hayashii H., Hazumi M., Higuchi I., Higuchi T., Hokuue T., Hoshi Y., Hou W. S., Hsiung Y. B., Huang H. C., Igarashi Y., Iijima T., Ikeda H., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki H., Iwasaki M., Iwasaki Y., Kamitani T., Kang J. H., Kang J. S., Kapusta P., Kataoka S. U., Katayama N., Kawai H., Kawai H., Kawasaki T., Kichimi H., Kikuchi M., Kikutani E., Kim H. J., Kim H., Kim J. H., Kim S. K., Kinoshita K., Koiso H., Koppenburg P., Korpar S., Križan P., Krokovny P., Kumar S., Kwon Y. J., Lange J. S., Leder G., Lee S. H.

An improved measurement of the CP-violation parameters in decays based on a 140 fb-1 data sample was presented. One neutral B meson was reconstructed in one of the specified decay channels. Results show that there is a large CP-violating phase in its decay amplitude. It was also observed that the CP asymmetry in the decay differs from the standard model expectation by 3. 5 standard deviations.