Measurement of the Branching Fractions for $B\to \omega K$ and $B\to \omega \pi$

Abstract

We report improved measurements of branching fractions for charmless hadronic two-body {\it B} meson decays containing an $\omega$ meson in the final state. The results are based on a data sample of 78 fb${}^{-1}$ collected on the ${\rm Y}(4S)$ resonance by the Belle detector. We measure the branching fractions $\mathcal{B}(B^{+}\to \omega K^{+})=(6.5_{-1.2}^{+1.3}\pm 0.6)\times 10^{-6}$ and $\mathcal{B}(B^{+}\to \omega {\pi }^{+})=(5.7_{-1.3}^{+1.4}\pm 0.6)\times 10^{-6}.$ We give 90% confidence upper limits for $\mathcal{B}(B^0\to \omega K^0)<7.6\times 10^{-6}$ and $\mathcal{B}(B^0\to \omega {\pi }^0)<1.9\times 10^{-6}.$ We also obtain the partial rate asymmetries ${\mathcal{A}}_{CP}=0.06_{-0.18}^{+0.21}\pm 0.01$ for $B^{\pm }\to \omega K^{\pm }$ and ${\mathcal{A}}_{CP}=0.50_{-0.20}^{+0.23}\pm 0.02$ for $B^{\pm }\to \omega {\pi }^{\pm }.$

7 pages, 4 figures, tar.gz files submitted to PRD

References in corpus (3)

• Testing QCD factorisation and charming penguins in charmless $\mathbf{B}\to \mathbf{PV}$
• Observation of $B^0\raωK^0$, $B^+\raηπ^+$, and $B^+\raηK^+$ and Study of Related Decays
• Observation of B+- -> omega K+- Decay

Cited by in corpus (4)

• Branching fraction and CP-violation charge asymmetry measurements for B-meson decays to eta K+-, etapi+-, eta'K, eta'pi+-, omega K, and omegapi+-
• Measurement of charmless $B$ Decays to $\eta K^{\ast }$ and $\eta \rho$
• Measurements of CP-Violating Asymmetries and Branching Fractions in B Decays to omegaK and omegapi
• Improved measurements of branching fractions and CP partial rate asymmetries for $B\to \omega K$ and $B\to \omega \pi$