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Measurement of B ---> D(*)(s) K pi branching fractions

Collaboration
•
Mar, 2009
10 pages
Published in:
  • Phys.Rev.D 80 (2009) 052005
e-Print:
DOI:
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2009201320172021202401234
Abstract: (arXiv)
We report a measurement of the exclusive B+B^+ meson decay to the Ds(∗)−K+π+D_s^{(*)-} K^+\pi^+ final state using 657×106BB‾657 \times 10^{6} B\overline{B} pairs collected at the Υ(4S)\Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e−e^+e^- collider. We use Ds∗−→Ds−γD_s^{*-}\to D_s^-\gamma and the Ds−→ϕπ−D_s^-\to \phi\pi^-, K∗‾(892)0K−\overline{K^{*}}(892)^0 K^- and KS0K−K^0_S K^- decay modes for Ds(∗)D_s^{(*)} reconstruction and measure the following branching fractions: B(B+→Ds−K+π+)=(1.94−0.08+0.09(stat)−0.20+0.20(syst)±0.17(B))×10−4{\cal B}(B^+\to D_s^-K^+\pi^+)= (1.94^{+0.09}_{-0.08} ({\mathrm stat})^{+0.20}_{-0.20} {\mathrm (syst)} \pm 0.17 {\cal(B)})\times 10^{-4} and B(B+→Ds∗−K+π+)=(1.47−0.14+0.15(stat)−0.19+0.19(syst)±0.13(B))×10−4{\cal B}(B^+\to D_s^{*-}K^+\pi^+)= (1.47^{+0.15}_{-0.14} ({\mathrm stat})^{+0.19}_{-0.19} ({\mathrm syst}) \pm 0.13 {\cal(B)})\times 10^{-4}. The uncertainties are due to statistics, experimental systematic errors and uncertainties of intermediate branching fractions, respectively.
  • 14.40.Nd
  • 13.25.Hw
  • B+: hadronic decay
  • B+: branching ratio
  • BELLE
  • KEK-B
  • electron positron: annihilation
  • B: pair production
  • D/s*(2110): radiative decay
  • D/s-: hadronic decay