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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2007, vol. 75, p. -

Study of the charmed baryonic decays B̄0→Σc++p̄π- and B̄0→Σc0p̄π+

Park K. S., Kichimi H., Abe K., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Aulchenko V., Aushev T., Banerjee S., Barberio E., Barbero M., Bedny I., Belous K., Bitenc U., Bondar A., Bozek A., Bračko M., Browder T. E., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Cole S., Dalseno J., Dash M., Drutskoy A., Eidelman S., Epifanov D., Fratina S., Gabyshev N., Gershon T., Go A., Gokhroo G., Goldenzweig P., Golob B., Ha H., Haba J., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hoshi Y., Hou S., Iijima T., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kapusta P., Kawasaki T., Khan H. R., Kim H. O., Kim S. K., Kim Y. J., Korpar S., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. J., Lesiak T., Li J., Limosani A., Lin S. W., Liventsev D., Majumder G., Mandl F., Matsumoto T., McOnie S., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Nakamura I., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Nozaki T., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Onuki Y., Ostrowicz W.

We study the three-body charmed baryonic decays B̄0→Σ c++p̄π- and B̄0→Σc0p̄π+ in the four-body final state B̄0→Λc+p̄π+π-, using a data sample of 357fb-1 accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure the branching fractions B(B̄0→Σc(2455)++p̄π-)=(2.1±0.2±0. 3±0.5)×10-4, B(B̄0→Σc(2455)0p̄π+)=(1. 4±0.2±0.2±0.4)×10-4 and B(B̄0→Σ c(2520)++p̄π-)=(1.2±0.1±0.2±0.3)×10-4 with signal significances of 13.1σ, 9.4σ and 7.1σ, respectively. The errors are statistical, systematic, and due to the uncertainty in B(Λc+→pK-π+), respectively. We also set an upper limit B(B̄0→Σc(2520)0p̄π+)<0.38×10-4 at the 90% confidence level. In addition, we obtain a nonresonant branching fraction of (6.4±0.4±0.9±1.7)×10-4, and a total branching fraction of (11.2±0.5±1.4±2.9)×10-4 for B̄0→Λc+p̄π+π-. © 2007 The American Physical Society.