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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2006, vol. 73, p. -

Measurement of 3 with a Dalitz plot analysis of B+→D(*) K(*)+ decay

Poluektov A., Abe K., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Aushev T., Bahinipati S., Bakich A. M., Balagura V., Barberio E., Barbero M., Bedny I., Belous K., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bračko M., Browder T. E., Chang P., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi Y., Chuvikov A., Dalseno J., Danilov M., Dash M., Drutskoy A., Eidelman S., Epifanov D., Fratina S., Gabyshev N., Garmash A., Gershon T., Gokhroo G., Golob B., Gorišek A., Haba J., Hara T., Hayasaka K., Hayashii H., Hazumi M., Hokuue T., Hoshi Y., Hou W. S., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki Y., Kawai H., Kawasaki T., Khan H. R., Kim H. J., Kinoshita K., Korpar S., Križan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. J., Lee J., Lesiak T., Li J., Liventsev D., MacNaughton J., Majumder G., Mandl F., Marlow D., Matsumoto T., Matyja A., McOnie S., Mitaroff W., Miyabayashi K., Miyake H., Miyata H., Mohapatra D., Nagamine T., Nakamura I., Nakano E., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Nozaki T.

We present a measurement of the unitarity triangle angle 3 using a Dalitz plot analysis of the KS0π+π- decay of the neutral D meson from the B±→D(*)K(*)± process. The method exploits the interference between D0 and D̄0 to extract the angle 3, strong phase δ and the ratio r of suppressed and allowed amplitudes. We apply this method to a 357fb-1 data sample collected by the Belle experiment. The analysis uses three modes: B+→DK+, B+→D*K+ with D*→Dπ0, and B+→DK*+ with K*+→KS0π+, as well as the corresponding charge-conjugate modes. From a combined maximum likelihood fit to the three modes, we obtain 3=53°+15°-18°(stat)±3°(syst) ±9°(model). The corresponding 2 standard deviation interval is 8°<3<111°. © 2006 The American Physical Society.