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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2002, vol. 66, p. -

Study of exclusive B decays to charmed baryons

Gabyshev N., Kichimi H., Abe K., Abe K., Abe T., Adachi I., Aihara H., Akatsu M., Asano Y., Aso T., Aulchenko V., Aushev T., Bakich A. M., Ban Y., Banas E., Bay A., Behera P. K., Bizjak I., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Casey B. C K, Chang P., Chao Y., Chen K. F., Cheon B. G., Chistov R., Choi S. K., Choi Y., Choi Y. K., Danilov M., Dong L. Y., Drutskoy A., Eidelman S., Eiges V., Enari Y., Fang F., Garmash A., Gershon T., Golob B., Haba J., Hara T., Hayashii H., Hazumi M., Heenan E. M., Higuchi T., Hinz L., Hojo T., Hokuue T., Hoshi Y., Hou W. S., Huang H. C., Igaki T., Igarashi Y., Iijima T., Inami K., Ishikawa A., Itoh R., Iwasaki H., Iwasaki Y., Jang H. K., Kang J. H., Kang J. S., Kapusta P., Katayama N., Kawai H., Kawakami Y., Kawasaki T., Kim D. W., Kim Heejong, Kim H. J., Kim H. O., Kim Hyunwoo, Kim S. K., Kinoshita K., Kobayashi S., Korpar S., Križan P., Krokoyny P., Kulasiri R., Kwon Y. J., Lange J. S., Leder G., Lee S. H., Li J., Liventsev D., Lu R. S., MacNaughton J., Majumder G., Mandl F., Matsumoto S., Matsumoto T.

Using 29.1 fb -1 of data accumulated at the γ(4S) with the Belle detector at KEKB, we have studied the decay modes B̄ 0→Λ c +p̄π + π -→ B -→Λ c +p̄π -, and B̄ 0→Λ c +p̄. We report branching fractions of exclusive B decays to charmed baryons with four-, three- and two-body final states, including intermediate ∑ c ++ and ∑ c 0 states. We observed B̄ 0→∑ c2(2455) ++p̄π - for the first time with a branching fraction of (2.38 -0.55 +0.63±0.41 ±0.62)×10 -4 and observed evidence for the two-body decay B -→∑ c(2455) 0p̄ with a branching fraction of (0.45 -0.19 +0.26±0.07±0.12) ×10 -4. We also set improved upper limits for the two-body decays B̄ 0→Λ c +p̄ and B̄ -→∑ c(2520) 0p̄. © 2002 The American Physical Society.