Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2004, vol. 70, p. 111103-1

Observation of B 0 → D* -(5π) +, B + → D* -(4π) ++ and B + → D̄* 0 (5π) +

Majumder G., Abe K., Abe K., Adachi I., Aihara H., Akatsu M., Asano Y., Aziz T., Bahinipati S., Bakich A. M., Bartel W., Bay A., Bedny I., Bitenc U., Bizjak I., Bozek A., Brodzicka J., Browder T. E., Chao Y., Chen W. T., Cheon B. G., Chistov R., Choi S. K., Chuvikov A., Cole S., Danilov M., Dash M., Eidelman S., Eiges V., Epifanov D., Fratina S., Gabyshev N., Garmash A., Gershon T., Gokhroo G., Haba J., Hayasaka K., Hazumi M., Hoshi Y., Hou S., Hou W. S., Iijima T., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kang J. S., Katayama N., Kawasaki T., Khan H. R., Kim H. J., Kinoshita K., Križan P., Krokovny P., Kumar S., Kuo C. C., Kwon Y. J., Lange J. S., Leder G., Lesiak T., Lin S. W., MacNaughton J., Mandl F., Matsumoto T., Matyja A., Mitaroff W., Miyake H., Miyata H., Mohapatra D., Nagasaka Y., Nakadaira T., Nakao M., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okabe T., Okuno S., Olsen S. L., Ostrowicz W., Ozaki H., Park H., Park K. S., Parslow N., Piilonen L. E., Sakai Y., Sato N., Schietinger T., Schneider O., Schümann J., Semenov S., Senyo K., Shibuya H., Singh J. B., Somov A., Soni N.

We report the first observation of a number of decay modes of the B meson, namely B 0 → D* - (5π) +, B + → D* -(4π) ++, and B + → D̄* 0(5π) +, where (nπ) implies the combination of n charged pions. The analysis is based on a 140 fb -1 data sample collected at the Y(4S) resonance with the Belle detector at KEKB: We measure B[B 0 → D* -(5π) +] = (4.72 ± 0.59 ± 0.71) × 10 -3, B[B + → D* -(4μ) ++] = (2.56 ± 0.26 ± 0.33) × 10 -3, and B[B + → D̄* 0(5π) +] = (5.67 ± 0.91 ± 0.85) × 10 -3. We also provide improved measurements of the branching fractions for the decay modes B 0 → D* -(3π) +, B + → D̄* 0°(3π) +, and B 0 → D̄* 0(4π) 0.