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Measurement of B -> D_s K pi branching ratios

High Energy Physics - Experiment 2007-08-22 v1
Authors: The Belle Collaboration , K. Abe
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Abstract

We report a measurement of the exclusive B+B^+ meson decay to the final state Ds−K+π+D_s^- K^+\pi^+ using 520×106BBˉ520 \times 10^{6} B\bar{B} pairs collected near the Υ(4S)\Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e−e^+e^- collider. Using the DS−→ϕπ−D_S^- \to \phi \pi^- decay mode to reconstruct Ds−D_s^- mesons, we obtain the branching fraction B(B+→Ds−K+π+)=(1.77−0.12+0.12(stat)±0.16(syst)±0.23(B))×10−4{\cal B}(B^+\to D_s^-K^+\pi^+)= (1.77^{+0.12}_{-0.12} {\mathrm (stat)} \pm 0.16 {\mathrm (syst)} \pm 0.23 {\cal(B)})\times 10^{-4}. We also present preliminary results of a study of the two-body DsKD_sK, DsπD_s\pi and KπK\pi subsystems observed in this final state.

Keywords

B meson decay branching ratio Belle detector KEKB collider exclusive decay D_s meson CKM matrix

Cite

@article{arxiv.0708.2885,
  title  = {Measurement of B -> D_s K pi branching ratios},
  author = {The Belle Collaboration and K. Abe},
  journal= {arXiv preprint arXiv:0708.2885},
  year   = {2007}
}

Comments

22 pages, 12 figures, submitted to the 2007 Lepton-Photon Symposium

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