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Observation of B0→ωK0B^0 \to \omega K^0, B+→ηπ+B^+ \to \eta \pi^+, and B+→ηK+B^+ \to \eta K^+ and study of related decays

Collaboration
Nov, 2003
7 pages
Published in:
  • Phys.Rev.Lett. 92 (2004) 061801
e-Print:
DOI:
Report number:
  • SLAC-PUB-10240,
  • BABAR-CONF-03-041,
  • BABAR-PUB-03-041
Experiments:
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Abstract:
We present measurements of branching fractions and charge asymmetries for seven B-meson decays with an eta, eta' or omega meson in the final state. The data sample corresponds to 89 million BBbar pairs produced from e+e- annihilation at the Upsilon(4S) resonance. We measure the following branching fractions in units of 10^{-6}: B(etapi+)=5.3+/-1.0+/-0.3, B(etaK+)=3.4+/-0.8+/-0.2, B(etaK0)=2.9+/-1.0+/- 0.2 (<5.2, 90% C.L.), B(eta'pi+=2.7+/-1.2+/-0.3 (<4.5, 90% C.L.), B(omegapi+)=5.5+/-0.9+/-0.5, B(omegaKp)=4.8+/-0.8+/-0.4, and B(omegaK0)=5.9+1.6-1.3+/-0.5. The charge asymmetries are A_ch(etapi+)=-0.44+/-0.18+/-0.01, A_ch(etaK+)=-0.52+/-0.24+/-0.01, A_ch(omegapi+)=0.03+/-0.16+/-0.01 and A_ch(omegaK+)=-0.09+/-0.17+/-0.01.
  • electron positron: colliding beams
  • electron positron: annihilation
  • Upsilon(10570): electroproduction
  • B: pair production
  • B0: hadronic decay
  • final state: (2meson)
  • omega(783)
  • eta(958)
  • B+: branching ratio
  • B0: branching ratio