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A study of the rare decays B0→Ds(∗)+π−B^0 \to D_s^{(*)+} \pi^- and B0→Ds(∗)−K+B^0 \to D_s^{(*)-} K+

Collaboration
Nov, 2002
7 pages
Published in:
  • Phys.Rev.Lett. 90 (2003) 181803
e-Print:
DOI:
Report number:
  • SLAC-PUB-9329,
  • BABAR-PUB-02-010
Experiments:
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Abstract:
We report evidence for the decays B0→Ds+π−B^0\to D_s^{+} \pi^- and B0→Ds−K+B^0\to D_s^{-} K^+ and the results of a search for B0→Ds∗+π−B^0 \to D_s^{*+} \pi^- and B0→Ds∗−K+B^0\to D_s^{*-} K^+ in a sample of 84 milion Y(4S) decays into BBˉB\bar{B} pairs collected with the BaBar detector at the PEP II asymmetric-energy e+e−e^{+}e^{-} storage ring. We measure the branching fraction Br(B0→Ds+π−)=3.2±0.9(stat.)±1.0(syst.)B^0 \to D_s^{+} \pi^-) = 3.2 \pm 0.9 ({\rm stat.})\pm 1.0 ({\rm syst.}). and Br(B0→Ds+π−)=3.2±1.0(stat.)±1.0(syst.)B^0 \to D_s^{+} \pi^-) = 3.2 \pm 1.0 ({\rm stat.})\pm 1.0 ({\rm syst.}). We also set 90% C.L. limits BR(B0→Ds∗+π−)<4.1×10−5B^0 \to D_s^{*+} \pi^-) < 4.1\times 10^{-5} at 90% C.L and BR(B0→Ds∗−K+)<2.5×10−5B^0 \to D_s^{*-} K^+)< 2.5\times 10^{-5} at 90% C.L.
  • electron positron: colliding beams
  • electron positron: annihilation
  • Upsilon(10570): electroproduction
  • B: pair production
  • B0: rare decay
  • D/s: hadronic decay
  • D/s*(2110): radiative decay
  • B0: branching ratio
  • upper limit
  • BaBar