Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2006, vol. 97, p. -

Measurement of the quark mixing parameter cos21 using time-dependent dalitz analysis of B̄0→D[KS0π+π-]h0

Krokovny P., Abe K., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Asano Y., Aulchenko V., Aushev T., Bahinipati S., Bakich A. M., Balagura V., Barberio E., Bay A., Bitenc U., Bizjak I., Bondar A., Bozek A., Bračko M., Browder T. E., Chao Y., Chen A., Chen W. T., Choi Y., Chuvikov A., Cole S., Dalseno J., Danilov M., Dash M., Eidelman S., Epifanov D., Fratina S., Gabyshev N., Garmash A., Gershon T., Go A., Gorišek A., Ha H., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Higuchi T., Hinz L., Hokuue T., Hoshi Y., Hou S., Hou W. S., Hsiung Y. B., Iijima T., Ikado K., Imoto A., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim S. M., Kinoshita K., Korpar S., Križan P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. J., Lee J., Lesiak T., Li J., Lin S. W., Majumder G., Matsumoto T., McOnie S., Mitaroff W., Miyabayashi K., Miyazaki Y., Mori T., Nakamura I., Nakao M., Nishida S., Nozaki T., Ogawa S., Ohshima T., Okabe T., Okuno S., Ozaki H., Pakhlov P., Park C. W.

We present a measurement of the angle 1 of the Cabibbo-Kobayashi-Maskawa unitarity triangle using a time-dependent Dalitz analysis of D→KS0π+π- decays produced in neutral B meson decay to a neutral D meson and a light meson (B̄0→D(*)h0). The method allows a direct extraction of 21 and, therefore, helps to resolve the ambiguity between 21 and π-21 in the measurement of sin21. We obtain sin21=0.78±0.44±0. 22 and cos21=1.87-0.53-0.32+0.40+0.22. The sign of cos21 is determined to be positive at 98.3% C.L. © 2006 The American Physical Society.