Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2010, vol. 104, p. -

Observation of Bs0→Ds*-π+ and Bs0→Ds(*) -ρ+ and measurement of the Bs0→Ds*-ρ+ longitudinal polarization fraction

Louvot R., Schneider O., Aushev T., Arinstein K., Bakich A. M., Balagura V., Barberio E., Bay A., Belous K., Bischofberger M., Bondar A., Bozek A., Bračko M., Browder T. E., Chang P., Chao Y., Chen A., Chen K. F., Chen P., Cheon B. G., Chiang C. C., Cho I. S., Choi Y., Danilov M., Dash M., Drutskoy A., Eidelman S., Goldenzweig P., Golob B., Ha H., Haba J., Hara T., Horii Y., Hoshi Y., Hou W. S., Hsiung Y. B., Hyun H. J., Iijima T., Inami K., Itoh R., Iwabuchi M., Iwasaki M., Iwasaki Y., Joshi N. J., Kah D. H., Kang J. H., Kapusta P., Katayama N., Kawasaki T., Kiesling C., Kim H. J., Kim H. O., Kim J. H., Kim M. J., Kim Y. J., Kinoshita K., Ko B. R., Kodyš P., Korpar S., Križan P., Krokovny P., Kumita T., Kwon Y. J., Kyeong S. H., Lange J. S., Lee M. J., Lee S. H., Li J., Liu C., Matyja A., McOnie S., Miyabayashi K., Miyata H., Miyazaki Y., Mohanty G. B., Nakao M., Nakazawa H., Nishida S., Nishimura K., Nitoh O., Ohshima T., Okuno S., Olsen S. L., Pakhlov P., Pakhlova G., Palka H., Park H., Park H. K., Pestotnik R., Petrič M., Piilonen L. E.

First observations of the Bs0→Ds*-π+, Bs0→Ds-ρ+ and Bs0→Ds*-ρ+ decays are reported together with measurements of their branching fractions: B(Bs0→Ds*-π+)=[2.4-0.4+0.5(stat)±0.3(syst) ±0.4(fs)]×10-3, B(Bs0→Ds-ρ+)=[8.5-1. 2+1.3(stat)±1.1(syst)±1.3(fs)]×10-3 and B(Bs0→Ds*-ρ+)=[11.9-2.0+2.2(stat)±1.7(syst) ±1.8(fs)]×10-3 (fs=NBs(*)B̄s(*)/ Nbb̄). From helicity-angle distributions, we measured the longitudinal polarization fraction in Bs0→Ds*-ρ+ decays to be fL(Bs0→Ds*-ρ+)=1.05-0.10+0.08(stat)-0.04+0.03(syst). These results are based on a 23.6fb-1 data sample collected at the Υ(5S) resonance with the Belle detector at the KEKB e+e - collider. © 2010 The American Physical Society.