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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2008, vol. 77, p. -

Measurement of the branching fraction and charge asymmetry of the decay B+→D+D̄0 and search for B0→D0D̄0

Adachi I., Aihara H., Arinstein K., Aulchenko V., Aushev T., Bakich A. M., Balagura V., Belous K., Bhardwaj V., Bitenc U., Blyth S., Bondar A., Bozek A., Bračko M., Brodzicka J., Chao Y., Chen A., Chen K. F., Chen W. T., Cheon B. G., Chistov R., Cho I. S., Choi S. K., Choi Y., Dalseno J., Dash M., Eidelman S., Epifanov D., Fratina S., Ha H., Haba J., Hara T., Hazumi M., Heffernan D., Hoshi Y., Hou W. S., Hyun H. J., Inami K., Ishikawa A., Ishino H., Iwasaki M., Iwasaki Y., Kah D. H., Katayama N., Kawai H., Kawasaki T., Kichimi H., Kim H. J., Kim S. K., Kinoshita K., Korpar S., Krokovny P., Kuo C. C., Kuroki Y., Kuzmin A., Kwon Y. J., Lee J. S., Lee M. J., Lee S. E., Lesiak T., Lin S. W., Liu C., Liventsev D., Mandl F., McOnie S., Medvedeva T., Mitaroff W., Miyabayashi K., Miyata H., Miyazaki Y., Mizuk R., Mohapatra D., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Pakhlov P., Pakhlova G., Park C. W., Park H., Park H. K., Peak L. S., Piilonen L. E., Poluektov A., Sahoo H., Sakai Y., Schneider O., Schümann J., Schwanda C., Senyo K., Shapkin M., Shibuya H., Shiu J. G., Somov A.

We report an improved measurement of the B+→D+D̄0 and B0→D0D̄0 decays based on 657×106 BB̄ events collected with the Belle detector at KEKB. We measure the branching fraction and charge asymmetry for the B+→D+D̄0 decay: B(B+→D+D̄0)=(3. 85±0.31±0.38)×10-4 and ACP(B+→D+D̄0)=0. 00±0.08±0.02, where the first error is statistical and the second is systematic. We also set the upper limit for the B0→D0D̄0 decay: B(B0→D0D̄0)<0.43×10-4 at 90% CL. © 2008 The American Physical Society.