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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2010, vol. 81, p. -

Measurement of γ 5S decays to B0 and B+ mesons

Drutskoy A., Adachi I., Aihara H., Aulchenko V., Aushev T., Bakich A. M., Balagura V., Bhardwaj V., Bischofberger M., Bondar A., Bozek A., Bračko M., Browder T. E., Chao Y., Chen A., Chen P., Cheon B. G., Choi S. K., Choi Y., Dalseno J., Danilov M., Doležal Z., Dungel W., Eidelman S., Gabyshev N., Golob B., Ha H., Haba J., Hayashii H., Horii Y., Hoshi Y., Hou W. S., Hsiung Y. B., Hyun H. J., Iijima T., Inami K., Itoh R., Iwabuchi M., Iwasaki Y., Julius T., Kah D. H., Kang J. H., Katayama N., Kichimi H., Kiesling C., Kim H. J., Kim H. O., Kim M. J., Kinoshita K., Ko B. R., Korpar S., Krokovny P., Kumita T., Kuzmin A., Kwon Y. J., Kyeong S. H., Lange J. S., Lee S. H., Li J., Liu C., Liventsev D., Louvot R., Matyja A., McOnie S., Miyabayashi K., Miyata H., Miyazaki Y., Mohanty G. B., Mori T., Mussa R., Nagasaka Y., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Ohshima T., Okuno S., Olsen S. L., Pakhlova G., Park H., Park H. K., Pestotnik R., Petrič M., Piilonen L. E., Poluektov A., Ryu S., Sakai Y., Schneider O.

Decays of the Υ(5S) resonance to channels with B+ and B0 mesons are studied using a 23.6fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. Fully reconstructed B+→J/ψK+, B0→J/ψK*0, B+→D̄0π +, and B0→D-π+ decays are used to obtain the charged and neutral B production rates per bb̄ event, f(B +)=(72.1-3.8+3.9±5.0)% and f(B0)=(77.0-5.6+5.8±6.1)%. Assuming equal rates to B+ and B0 mesons in all channels produced at the Υ(5S) energy, we measure the fractions for transitions to two-body and three-body channels with B meson pairs, f(BB̄)=(5.5-0.9+1.0±0.4)%, f(BB̄*+B*B̄)=(13. 7±1.3±1.1)%, f(B*B̄ *)=(37.5-1.9+2.1±3.0)%, f(BB̄π)=(0.0±1. 2±0.3)%, f(BB̄*π+B *B̄π)=(7.3-2.1+2.3±0.8)%, and f(B *B̄*π)=(1.0-1.3+1. 4±0.4)%. The latter three fractions are obtained assuming isospin conservation. © 2010 The American Physical Society.