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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2015, vol. 91, 9, p. -

Measurements of B → D ¯ Ds0∗+ (2317) decay rates and a search for isospin partners of the Ds0∗+ (2317)

Choi S. K., Olsen S. L., Abdesselam A., Adachi I., Aihara H., Arinstein K., Asner D. M., Aushev T., Ayad R., Babu V., Badhrees I., Bakich A. M., Barberio E., Bhardwaj V., Bhuyan B., Bonvicini G., Bozek A., Bračko M., Browder T. E., Červenkov D., Chen A., Cheon B. G., Chilikin K., Chistov R., Cho K., Chobanova V., Choi Y., Cinabro D., Dalseno J., Danilov M., Doležal Z., Drásal Z., Drutskoy A., Dutta D., Eidelman S., Farhat H., Fast J. E., Ferber T., Fulsom B. G., Gaur V., Gabyshev N., Garmash A., Getzkow D., Gillard R., Glattauer R., Goh Y. M., Golob B., Haba J., Hara T., Hayasaka K., Hayashii H., He X. H., Horiguchi T., Hou W. S., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki Y., Jaegle I., Joffe D., Julius T., Kang K. H., Kato E., Katrenko P., Kawasaki T., Kim B. H., Kim D. Y., Kim H. J., Kim J. B., Kim J. H., Kim K. T., Kim S. H., Kim Y. J., Kinoshita K., Ko B. R., Kodyš P., Korpar S., Križan P., Krokovny P., Kumita T., Kuzmin A., Kwon Y. J., Lange J. S., Lee I. S.

© 2015 American Physical Society. We report improved measurements of the product branching fractions B(B+→D¯0Ds0∗+(2317))×B(Ds0∗+(2317)→Ds+π0)=(8.0-1.2+1.3±1.1±0.4)×10-4 and B(B0→D-Ds0∗+(2317))×B(Ds0∗+(2317)→Ds+π0)=(10.2-1.2+1.3±1.0±0.4)×10-4, where the first errors are statistical, the second are systematic and the third are from D and Ds+ branching fractions. In addition, we report negative results from a search for hypothesized neutral (z0) and doubly charged (z++) isospin partners of the Ds0∗+(2317) and provide upper limits on the product branching fractions B(B0→D0z0)×B(z0→Ds+π-) and B(B+→D0z++)×B(z++→Ds+π+) that are more than an order of magnitude smaller than theoretical expectations for the hypotheses that the Ds0∗+(2317) is a member of an isospin triplet. The analysis uses a 711fb-1 data sample containing 772 million BB¯-meson pairs collected at the γ(4S) resonance in the Belle detector at the KEKB collider.