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

Search for D0-D̄0 mixing using semileptonic decays at Belle

Bitenc U., Abe K., Abe K., Adachi I., Aihara H., Asano Y., Aushev T., Bahinipati S., Banerjee S., Barberio E., Barbero M., Bedny I., Bizjak I., Blyth S., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi Y., Chuvikov A., Cole S., Dalseno J., Danilov M., Dash M., Dong L. Y., Dragic J., Drutskoy A., Eidelman S., Enari Y., Fratina S., Gabyshev N., Gershon T., Go A., Gokhroo G., Golob B., Gorišek A., Haba J., Hayasaka K., Hayashii H., Hazumi M., Hokuue T., Hoshi Y., Hou S., Hou W. S., Iijima T., Ikado K., Imoto A., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kang J. S., Kapusta P., Kataoka S. U., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim J. H., Kim S. M., Kinoshita K., Korpar S., Križan P., Krokovny P., Kuo C. C., Kwon Y. J., Lange J. S., Leder G., Lee S. E., Lesiak T., Li J., Liventsev D., Mandl F., Matsumoto T., Matyja A., Mitaroff W., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Mohapatra D., Moloney G. R., Nagamine T., Nagasaka Y., Nakano E., Natkaniec Z., Nishida S.

A search for mixing in the neutral D meson system has been performed using semileptonic D0→K(*)-e+ν decays. Neutral D mesons from D*+→D0π+ decays are used; the flavor at production is tagged by the charge of the slow pion. The measurement is performed using 253 fb-1 of data recorded by the Belle detector. From the yield of right-sign and wrong-sign decays arising from nonmixed and mixed events, respectively, we estimate the upper limit of the time-integrated mixing rate to be rD<1.0×10-3 at 90% C.L. © 2005 The American Physical Society.