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Measurement of B+ → D+ ̄d0 branching fraction and charge asymmetry and search for B0 → ̄d 0D 0

Abe K., Adachi I., Aihara H., Arinstein K., Aso T., Aulchenko V., Aushev T., Aziz T., Bahinipati S., Bakich A. M., Balagura V., Ban Y., Banerjee S., Barberio E., Bay A., Bedny I., Belous K., Bhardwaj V., Bitenc U., Blyth S., Bondar A., Bozek A., Bracko M., Brodzicka J., Browder T. E., Chang M. C., Chang P., Chao Y., Chen A., Chen K. F., Chen W. T., Cheon B. G., Chiang C. C., Chistov R., Cho I. S., Choi S. K., Choi Y., Choi Y. K., Cole S., Dalseno J., Danilov M., Das A., Dash M., Dragic J., Drutskoy A., Eidelman S., Epifanov D., Fratina S., Fujii H., Fujikawa M., Gabyshev N., Garmash A., Go A., Gokhroo G., Goldenzweig P., Golob B., Grosse Perdekamp M., Guler H., Ha H., Haba J., Hara K., Hara T., Hasegawa Y., Hastings N. C., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Higuchi T., Hinz L., Hoedlmoser H., Hokuue T., Horii Y., Hoshi Y., Hoshina K., Hou S., Hou W. S., Hsiung Y. B., Hyun H. J., Igarashi Y., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwabuchi M., Iwasaki M., Iwasaki Y., Jacoby C., Joshi N. J., Kaga M., Kah D. H., Kaji H., Kajiwara S., Kakuno H.

We report an improved measurement of the B+ → D+ ̄D0 and B0 → D0 ̄D0 decays based on 656.7 × 106 B ̄B events collected with the Belle detector at KEKB. We measure the branching fraction and charge asymmetry for the B+ → D+ ̄D0 decay: B(B+ → D+ ̄D0) = (3.85±0.31±0.38) × 10-4 and ACP (B+ → D+ ̄D0) = 0.00±0. 08±0.02, where the first error is statistical and the second is systematical. We also set the upper limit for the B0 → ̄D 0D0 decay: B(B0 → ̄D0D0) < 0.42×10-4 at 90% CL.