Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2005, vol. 71, p. 1-6

Search for B0→J/ψD̄0 and B+→J/ψD̄0π+ decays

Zhang L. M., Zhang Z. P., Abe K., Abe K., Adachi I., Aihara H., Asano Y., Aushev T., Bahinipati S., Bakich A. M., Barbero M., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chao Y., Chen A., Chen K. F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Chuvikov A., Cole S., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Fratina S., Gabyshev N., Gershon T., Gokhroo G., Golob B., Goriek A., Hara T., Hayasaka K., Hayashii H., Hazumi M., Hinz L., Hokuue T., 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., Kataoka S. U., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim H. J., Kim H. O., Kim S. K., Kim S. M., Kinoshita K., Korpar S., Krokovny P., Kulasiri R., Kumar S., Kuo C. C., Kwon Y. J., Leder G., Lesiak T., Li J., Lin S. W., Liventsev D., Majumder G., Mandl F., Matsumoto T., Mikami Y., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Mizuk R., Mohapatra D., Mori T., Nagamine T., Nagasaka Y., Nakano E., Nakao M., Natkaniec Z., Nishida S.

We report the results of a search for the decay modes B0→J/ ψD̄0 and B+→J/ψD̄0π+. The analysis is based on 140fb-1 of data accumulated by the Belle detector at the KEKB asymmetric-energy e+e- collider. No significant signals are observed and we determine the branching fraction upper limits B(B0→J/ψD̄0)<2.0×10-5 and B(B+→J/ψD̄0π+)<2.5×10-5 at 90% confidence level. These results rule out the explanation of the excess in the low momentum region of the inclusive J/ψ spectrum as intrinsic charm content in the B meson. The branching fractions of the corresponding nonresonant decay channels are also reported. © 2005 The American Physical Society.