Measurement of and branching fractions

Wiechczynski, J.*; Tanida, Kiyoshi ; Belle Collaboration*; 172 of others*

We report a measurement of the and meson decays to the and final states, respectively, using pairs collected at the resonance with the Belle detector at the KEKB asymmetric-energy collider. Using the , and decay modes for the reconstruction, we measure the following branching fractions: ${cal B}(B^0 to D^-_s K^0_S pi^+)=[0.47 pm 0.06({rm stat}) pm 0.05({rm syst})]times 10^{-4}$ and ${cal B}(B^+ to D^-_s K^+ K^+)=[0.93 pm 0.22({rm stat}) pm 0.10({rm syst})]times 10^{-5}$ . We find the ratio of the branching fraction of to that of the analogous Cabibbo-favored decay to be ${cal R_B}=0.054 pm 0.013({rm stat}) pm 0.006({rm syst})$ , which is consistent with the naive factorization model. We also observe a deviation of the invariant-mass distribution from the three-body phase-space model for both studied decays.

Language	:	English
Journal	:	Physical Review D
Volume	:	91
Number	:	3
Pages	:	p.032008_1 - 032008_9
Publication Year/Month	:	2015/02
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PDF	:	AA2015-0716.pdf:0.41MB
Paper URL	:	https://doi.org/10.1103/PhysRevD.91.032008
DOI for research data	:
Keywords	:	ハドロン分光
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Press Release	:
Article of JAEA R&D Review	:
Cooperating Institute	:	高エネルギー加速器研究機構

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Registration No. : AA20150716
JAEA Abstracts No. : 44000230
Paper Submission No. : 16919

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