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

Observation of B̄ 0 → D sJ*(2317) +K - decay

Drutskoy A., Abe K., Abe K., Adachi I., Aihara H., Akatsu M., Asano Y., Aushev T., Bahinipati S., Bakich A. M., Bay A., Bedny I., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Chen K. F., Chen W. T., Cheon B. G., Chistov R., Choi S. K., Choi Y., Chuvikov A., Cole S., Dalseno J., Danilov M., Dash M., Eidelman S., Eiges V., Enari Y., Fang F., Fratina S., Gabyshev N., Gershon T., Go A., Gokhroo G., Golob B., Hayasaka K., Hayashii H., Hazumi M., Higuchi T., Hinz L., Hokuue T., Hoshi Y., Hou S., Hou W. S., Imoto A., Inami K., Ishikawa A., Iwasaki M., Iwasaki Y., Kang J. H., Kang J. S., Kapusta P., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim H. J., Kim J. H., Kim S. K., Kim S. M., Kinoshita K., Koppenburg P., Križan P., Krokovny P., Kulasiri R., Kuo C. C., Kuzmin A., Kwon Y. J., Lange J. S., Lee S. H., Lesiak T., Li J., Lin S. W., Liventsev D., MacNaughton J., Majumder G., Mandl F., Matsumoto T., Matyja A., Mikami Y., Mitaroff W., Miyata H., Mizuk R., Mohapatra D., Mori T., Nagamine T., Nagasaka Y.

The decays B̄ 0 → D sJ + K - and B̄ 0 ̄ D sJ -π + are studied for the first time. A significant signal is observed in the B̄ 0 → D sJ *(2317) +K - decay channel with B(B̄ 0 → D sJ *(2317) +K -) × B(D sJ *(2317) + → D s +π 0) = (5.3 -1.3 -1.5 ± 0.7 ± 1.4) × 10 -5. No signals are observed in the B̄ 0 → D sJ *(2317) -, π + B̄ 0 → D sJ(2460) +K - and B̄ 0 → D sJ(2460) +π - decay modes, and upper limits are obtained. The analysis is based on a data set of 140 fb -1 collected by the Belle experiment at the asymmetric e + e - collider KEKB. © 2005 The American Physical Society.