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

Search for b→h(*)νν̄ decays at belle

Chen K. F., Adachi I., Aihara H., Aulchenko V., Aushev T., Bahinipati S., Bakich A. M., Balagura V., Barberio E., Bay A., Belous K., Bitenc U., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chang M. C., Chang P., Chao Y., Chen A., Cheon B. G., Chiang C. C., Cho I. S., Choi Y., Choi Y. K., Cole S., Danilov M., Dash M., Drutskoy A., Eidelman S., Fratina S., Gabyshev N., Golob B., Ha H., Haba J., Hara T., Hayasaka K., Hazumi M., 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., Kajiwara S., Kang J. H., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim Y. J., Kinoshita K., Korpar S., Krian P., Krokovny P., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. J., Lee J. S., Lee S. E., Lesiak T., Lin S. W., Liu Y., Liventsev D., Mandl F., Marlow D., Matyja A., McOnie S., Medvedeva T., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Nagasaka Y., Nakamura I., Nakao M., Nishida S., Ogawa S., Ohshima T., Okuno S., Olsen S. L., Ozaki H., Pakhlov P.

We present a search for the rare decays B→h(*)νν̄, where h(*) stands for a light meson. A data sample of 535×106 BB̄ pairs collected with the Belle detector at the KEKB e+e- collider is used. Signal candidates are required to have an accompanying B meson fully reconstructed in a hadronic mode and signal side particles consistent with a single h(*) meson. No significant signal is observed and we set upper limits on the branching fractions at 90% confidence level. The limits on B0→K*0νν̄ and B+→K+νν̄ decays are more stringent than the previous constraints, while the first searches for B0→K0νν̄, π0νν̄, ρ0νν̄, νν̄ and B+→K*+νν̄, ρ+νν̄ are reported. © 2007 The American Physical Society.