Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2007, vol. 99, p. -

Search for the CP-violating decays Υ(4S)→B0B̄0→J/ ψKS0+J/ψ(ηc)KS0

Tajima O., Hazumi M., Adachi I., Aihara H., Aulchenko V., Aushev T., Bakich A. M., Barberio E., Bay A., Bedny I., Bhardwaj V., Bitenc U., Bozek A., Bračko M., Browder T. E., Chang M. C., Chang P., Chen A., Chen K. F., Chen W. T., Cheon B. G., Chiang C. C., Chistov R., Cho I. S., Choi Y., Choi Y. K., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Epifanov D., Go A., Gokhroo G., Golob B., Haba J., Hayasaka K., Hayashii H., Heffernan D., Hokuue T., Hoshi Y., Hou W. S., Hsiung Y. B., Hyun H. J., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Joshi N. J., Kah D. H., Kaji H., Kang J. H., Kataoka S. U., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim H. O., Kim S. K., Kim Y. J., Kinoshita K., Korpar S., Krian P., Krokovny P., Kumar R., Kuo C. C., Kwon Y. J., Lange J. S., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Li J., Lin S. W., Liventsev D., Mandl F., Marlow D., McOnie S., Medvedeva T., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Mizuk R., Mohapatra D., Nagasaka Y., Nakano E., Nakao M., Nishida S., Nitoh O., Noguchi S.

We report the first search for CP-violating decays of the Υ(4S) using a data sample that contains 535×106 Υ(4S) mesons with the Belle detector at the KEKB asymmetric-energy e+e- collider. A partial reconstruction technique is employed to enhance the signal sensitivity. No significant signals were observed. We obtain an upper limit of 4×10-7 at the 90% confidence level for the branching fractions of the CP violating modes, Υ(4S)→B0B̄0→J/ψKS0+J/ψ(ηc)KS0. Extrapolating the result, we find that an observation with 5σ significance is expected with a 30ab-1 data sample, which is within the reach of a future super B factory. © 2007 The American Physical Society.