Measurement of B<sup>0</sup> → D<sup>-</sup><inf>s</inf> K<sup>0</sup><inf>S</inf> π<sup>+</sup> and B<sup>+</sup> → D<sup>-</sup><inf>s</inf>K<sup>+</sup>K<sup>+</sup> branching fractions

Date Issued
26-02-2015
Author(s)
Wiechczynski, J.
Stypula, J.
Abdesselam, A.
Adachi, I.
Adamczyk, K.
Aihara, H.
Al Said, S.
Arinstein, K.
Asner, D. M.
Aulchenko, V.
Aushev, T.
Ayad, R.
Bakich, A. M.
Bansal, V.
Bhardwaj, V.
Bhuyan, B.
Bobrov, A.
Bondar, A.
Bonvicini, G.
Bozek, A.
BraÄ ko, M.
Browder, T. E.
Èervenkov, D.
Chekelian, V.
Cheon, B. G.
Cho, K.
Chobanova, V.
Choi, S. K.
Choi, Y.
Cinabro, D.
Dalseno, J.
Danilov, M.
Dingfelder, J.
Doleəal, Z.
Drásal, Z.
Drutskoy, A.
Eidelman, S.
Farhat, H.
Fast, J. E.
Ferber, T.
Frost, O.
Gaur, V.
Gabyshev, N.
Ganguly, S.
Garmash, A.
Getzkow, D.
Gillard, R.
Goh, Y. M.
Grzymkowska, O.
Haba, J.
Hara, T.
Hayasaka, K.
Hayashii, H.
He, X. H.
Hou, W. S.
Huschle, M.
Hyun, H. J.
Iijima, T.
Ishikawa, A.
Itoh, R.
Iwasaki, Y.
Jaegle, I.
Joffe, D.
Joo, K. K.
Julius, T.
Kang, K. H.
Kato, E.
Kawasaki, T.
Kichimi, H.
Kim, D. Y.
Kim, J. B.
Kim, J. H.
Kim, M. J.
Kim, S. H.
Kim, Y. J.
Kinoshita, K.
Ko, B. R.
Kodyš, P.
Kriəan, P.
Krokovny, P.
Kuhr, T.
Kumita, T.
Kuzmin, A.
Kwon, Y. J.
Lange, J. S.
Lee, I. S.
Li, Y.
Li Gioi, L.
Indian Institute of Technology, Madras
Liventsev, D.
Lukin, P.
Matvienko, D.
Miyabayashi, K.
Miyata, H.
Mizuk, R.
Mohanty, G. B.
Moll, A.
Mori, T.
Mussa, R.
Nakao, M.
DOI
Abstract
We report a measurement of the B0 and B+ meson decays to the D-sK0Sπ+ and D-sK+K+ final states, respectively, using 657 × 106BB¯ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e+ collider. Using the D-s → φ π-, K∗(892)0K- and K0SK- decay modes for the Ds reconstruction, we measure the following branching fractions: B(B0 → D-sK0sπ+) = [0.47 ± 0.06(stat) ± 0.05(syst)] × 10-4 and B(B+ → D-sK+K+) = [0.93 ± 0.22(stat) ± 0.10(syst)] × 10-5. We find the ratio of the branching fraction of B+ → D-sK+K+ to that of the analogous Cabibbo-favored B+ → D-sK+π+ decay to be RB = 0.054 ± 0.013(stat) ± 0.006(syst), which is consistent with the naive factorization model. We also observe a deviation of the DsK invariant-mass distribution from the three-body phase-space model for both studied decays.
Volume
91