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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2009, vol. 80, p. -

Measurement of B→Ds(*)Kπ branching fractions

Wiechczynski J., Lesiak T., Aihara H., Arinstein K., Aulchenko V., Bakich A. M., Balagura V., Barberio E., Bay A., Belous K., Bhardwaj V., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chao Y., Chen A., Cheon B. G., Chistov R., Cho I. S., Choi Y., Dalseno J., Dash M., Drutskoy A., Eidelman S., Epifanov D., Gabyshev N., Garmash A., Goldenzweig P., Ha H., Han B. Y., Hoshi Y., Hou W. S., Hyun H. J., Iijima T., Inami K., Ishikawa A., Iwasaki M., Kah D. H., Kang J. H., Kapusta P., Kawai H., Kawasaki T., Kichimi H., Kim H. O., Kim J. H., Kim Y. I., Kim Y. J., Ko B. R., Križan P., Krokovny P., Kuzmin A., Kwon Y. J., Kyeong S. H., Lee S. E., Liu C., Liu Y., Liventsev D., Louvot R., Matyja A., McOnie S., Medvedeva T., Miyata H., Miyazaki Y., Mori T., Nagasaka Y., Nakano E., Nakao M., Nakazawa H., Nishimura K., Nitoh O., Ogawa S., Ohshima T., Okuno S., Ozaki H., Pakhlov P., Pakhlova G., Palka H., Park C. W., Park H. K., Park K. S., Pestotnik R., Piilonen L. E., Poluektov A., Sahoo H., Sakai Y., Schneider O., Schwanda C., Sekiya A., Senyo K., Sevior M. E., Shapkin M., Shebalin V., Shiu J. G., Shwartz B., Singh J. B.

We report a measurement of the exclusive B+ meson decay to the Ds(*)-K+π+ final state using 657×106BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We use Ds*-→Ds-γ and the Ds-→ π-, K̄*(892)0K- and KS0K- decay modes for Ds(*) reconstruction and measure the following branching fractions: B(B+→Ds-K+π+)=(1.71-0.07+0. 08(stat)-0.20+0.20(syst)±0.15(Bint))×10-4 and B(B+→Ds*- K+π+)=(1.31-0.12+0.13(stat)-0.25+0.25(syst)±0.12(Bint))×10-4. The uncertainties are due to statistics, experimental systematic errors, and uncertainties of intermediate branching fractions, respectively. © 2009 The American Physical Society.