Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2005, vol. 94, p. -

Observation of a near-threshold ωj/ψ mass enhancement in exclusive B→KωJ/ψ decays

Choi S. K., Olsen S. L., Abe K., Abe K., Adachi I., Aihara H., Asano Y., Bahinipati S., Bakich A. M., Ban Y., Bedny I., Bitenc U., Bizjak I., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chang M. C., Chang P., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi Y., Chuvikov A., Cole S., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Enari Y., Fang F., Fratina S., Gabyshev N., Gershon T., Gokhroo G., Golob B., Hara T., Hastings N. C., Hayasaka K., Hayashii H., Hazumi M., Hinz L., Hokuue T., Hoshi Y., Hou S., Hou W. S., Hsiung Y. B., Iijima T., Imoto A., Inami K., Ishikawa A., Iwasaki M., Iwasaki Y., Kang J. H., Kang J. S., Kataoka S. U., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim H. J., Kim S. M., Kinoshita K., Korpar S., Križan P., Krokovny P., Kuo C. C., Kuzmin A., Kwon Y. J., Lange J. S., Lee S. E., Lee S. H., Lesiak T., Li J., Lin S. W., Liventsev D., Majumder G., Matsumoto T., Matyja A., Mitaroff W., Miyabayashi K., Miyata H., Mizuk R., Mohapatra D., Moloney G. R., Nakano E., Nakao M., Nakazawa H., Nishida S., Nitoh O., Ogawa S.

We report the observation of a near-threshold enhancement in the ωJ/ψ invariant mass distribution for exclusive B→KωJ/ψ decays. The results are obtained from a 253fb-1 data sample that contains 275×106 BB̄ pairs that were collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. The statistical significance of the ωJ/ψ mass enhancement is estimated to be greater than 8σ. © 2005 The American Physical Society.