Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2005, vol. 72, p. -

Measurement of the branching fractions for B-→D(*)+π-+ -ν̄ and B0̄→D(*)0π+ -ν̄ and B

Liventsev D., Matsumoto T., Abe K., Abe K., Aihara H., Asano Y., Aushev T., Bakich A. M., Balagura V., Barbero M., Bedny I., Bitenc U., Bizjak I., Blyth S., Bondar A., Bračko M., Browder T. E., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi Y., Chuvikov A., Cole S., Dalseno J., Dash M., Dong L. Y., Eidelman S., Enari Y., Fratina S., Gabyshev N., Gershon T., Go A., Gokhroo G., Haba J., Hara T., Hayasaka K., Hayashii H., Hazumi M., Hinz L., Hokuue T., Hoshi Y., Hou S., Hou W. S., Iijima T., Ikado K., Imoto A., Ishikawa A., Itoh R., Iwasaki M., Kang J. H., Kang J. S., Kataoka S. U., Kawasaki T., Khan H. R., Kichimi H., Kim S. M., Kinoshita K., Križan P., Krokovny P., Kuo C. C., Kuzmin A., Kwon Y. J., Lesiak T., Lin S. W., Mandl F., Matyja A., Mitaroff W., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Nozaki T., Ogawa S., Ohshima T., Okabe T., Okuno S., Olsen S. L., Onuki Y., Ostrowicz W., Ozaki H., Pakhlov P., Palka H., Park C. W., Parslow N., Pestotnik R., Piilonen L. E., Ronga F. J., Rozanska M., Sakai Y., Sato N.

We report on a measurement of the branching fractions for B-→D(*)+π- -ν̄ and B0̄→D(*)0π+ -ν̄ with 275×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at KEKB. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We obtain B(B-→D+π- -ν̄)=(0.54±0.07(stat)±0.07(syst) ±0.06(BR))×10-2, B(B-→D*+π- -ν̄)=(0. 67±0.11(stat)±0.09(syst)±0.03(BR))×10-2, B(B0̄→D0π+ -ν̄)=(0.33±0.06(stat)±0.06(syst) ±0.03(BR))×10-2, B(B0̄→D*0π+ -ν̄)=(0.65±0.12(stat)±0.08(syst)±0.05(BR)) ×10-2, where the third error comes from the error on B̄→ D(*) -ν̄ decays. Contributions from B0̄→D*+- ν̄ decays are excluded in the measurement of B0̄→D0π+- ν̄. © 2005 The American Physical Society.