Charmless two-body B decays: A global analysis with QCD factorization

Abstract

In this paper, we perform a global analysis of $B\to PP$ and $PV$ decays with the QCD factorization approach. It is encouraging to observe that the predictions of QCD factorization are in good agreement with experiment. The best fit $\gamma$ is around $79^{\circ }$. The penguin-to-tree ratio $|P_{\pi \pi }/T_{\pi \pi }|$ of ${\pi }^{+}{\pi }^{-}$ decays is preferred to be larger than 0.3. We also show the confidence levels for some interesting channels: $B^0\to {\pi }^0{\pi }^0$, $K^{+}{K}^{-}$ and $B^{+}\to \omega {\pi }^{+}$, $\omega K^{+}$. For $B\to \pi K^{\ast }$ decays, they are expected to have smaller branching ratios with more precise measurements.

Comments: 20 pages, 4 figures, version to appear in Phys. Rev. D