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27 April 2024

» arxiv » 1411.2035

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Measurement of $B^0 o D_s^- K^0_Spi^+$ and $B^+ o D_s^- K^+K^+$ branching fractions
J. Wiechczynski ; J. Stypula ; A. Abdesselam ; I. Adachi ; K. Adamczyk ; H. Aihara ; S. Al Said ; K. Arinstein ; D. M. Asner ; V. Aulchenko ; T. Aushev ; R. Ayad ; A. M. Bakich ; V. Bansal ; V. Bhardwaj ; B. Bhuyan ; A. Bobrov ; A. Bondar ; G. Bonvicini ; A. Bozek ; M. Bračko ; T. E. Browder ; D. Červenkov ; V. Chekelian ; B. G. Cheon ; K. Cho ; V. Chobanova ; S.-K. Choi ; Y. Choi ; D. Cinabro ; J. Dalseno ; M. Danilov ; J. Dingfelder ; Z. Doležal ; Z. Drásal ; A. Drutskoy ; S. Eidelman ; H. Farhat ; J. E. Fast ; T. Ferber ; O. Frost ; V. Gaur ; N. Gabyshev ; S. Ganguly ; A. Garmash ; D. Getzkow ; R. Gillard ; Y. M. Goh ; O. Grzymkowska ; J. Haba ; T. Hara ; K. Hayasaka ; H. Hayashii ; X. H. He ; W.-S. Hou ; M. Huschle ; H. J. Hyun ; T. Iijima ; A. Ishikawa ; R. Itoh ; Y. Iwasaki ; I. Jaegle ; D. Joffe ; K. K. Joo ; T. Julius ; K. H. Kang ; E. Kato ; T. Kawasaki ; H. Kichimi ; D. Y. Kim ; J. B. Kim ; J. H. Kim ; M. J. Kim ; S. H. Kim ; Y. J. Kim ; K. Kinoshita ; B. R. Ko ; P. Kodyš ; P. Križan ; P. Krokovny ; T. Kuhr ; T. Kumita ; A. Kuzmin ; Y.-J. Kwon ; J. S. Lange ; I. S. Lee ; Y. Li ; L. Li Gioi ; J. Libby ; D. Liventsev ; P. Lukin ; D. Matvienko ; K. Miyabayashi ; H. Miyata ; R. Mizuk ; G. B. Mohanty ; A. Moll ; T. Mori ; R. Mussa ; M. Nakao ; T. Nanut ; Z. Natkaniec ; N. K. Nisar ; S. Nishida ; S. Ogawa ; S. Okuno ; P. Pakhlov ; G. Pakhlova ; C. W. Park ; H. Park ; T. K. Pedlar ; M. Petrič ; L. E. Piilonen ; E. Ribežl ; M. Ritter ; A. Rostomyan ; Y. Sakai ; S. Sandilya ; L. Santelj ; T. Sanuki ; Y. Sato ; V. Savinov ; O. Schneider ; G. Schnell ; C. Schwanda ; K. Senyo ; O. Seon ; M. E. Sevior ; V. Shebalin ; C. P. Shen ; T.-A. Shibata ; J.-G. Shiu ; B. Shwartz ; A. Sibidanov ; F. Simon ; Y.-S. Sohn ; E. Solovieva ; M. Starič ; M. Steder ; M. Sumihama ; U. Tamponi ; K. Tanida ; G. Tatishvili ; Y. Teramoto ; F. Thorne ; K. Trabelsi ; M. Uchida ; T. Uglov ; Y. Unno ; S. Uno ; P. Urquijo ; Y. Usov ; C. Van Hulse ; P. Vanhoefer ; G. Varner ; A. Vinokurova ; V. Vorobyev ; A. Vossen ; M. N. Wagner ; C. H. Wang ; M.-Z. Wang ; P. Wang ; M. Watanabe ; Y. Watanabe ; K. M. Williams ; E. Won ; J. Yamaoka ; S. Yashchenko ; Y. Yook ; Y. Yusa ; Z. P. Zhang ; V. Zhilich ; V. Zhulanov ; A. Zupanc ;
Date:	7 Nov 2014
Abstract:	We report a measurement of the $B^0$ and $B^+$ meson decays to the $D_s^-K^0_S pi^+$ and $D_s^- K^+K^+$ final states, respectively, using $657 imes 10^{6} Boverline{B}$ pairs collected at the $Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. Using the $D_s^- o phipi^-$, $K^{*}(892)^0 K^-$ and $K^0_S K^-$ decay modes for the $D_s$ reconstruction, we measure the following branching fractions: ${cal B}(B^0 o D_s^{-}K^0_Spi^+)=[0.47 pm 0.06 (mathrm {stat}) pm 0.05 (mathrm {syst})] imes 10^{-4}$ and ${cal B}(B^+ o D_s^-K^+K^+)= [0.93 pm 0.22 (mathrm {stat})pm 0.10 (mathrm {syst})] imes 10^{-5}$. We find the ratio of the branching fraction of $B^+ o D_s^-K^+K^+$ to that of the analogous Cabibbo favored $B^+ o D_s^-K^+pi^+$ decay to be ${cal R}_{cal B} = 0.054 pm 0.013 ({ m stat}) pm 0.006 ({ m syst})$, which is consistent with the na"{i}ve factorization model. We also observe a deviation from the three-body phase-space model for both studied decays.
Source:	arXiv, 1411.2035
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