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

In this paper, we perform a global analysis of $\stackrel{\ensuremath{\rightarrow}}{B}\mathrm{PP}$ and $\mathrm{PV}$ 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 $\ensuremath{\gamma}$ is around $79\ifmmode^\circ\else\textdegree\fi{}.$ The penguin-diagram--to--tree-diagram ratio $|{P}_{\ensuremath{\pi}\ensuremath{\pi}}{/T}_{\ensuremath{\pi}\ensuremath{\pi}}|$ of ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ decays is preferred to be larger than $0.3.$ We also show the confidence levels for some interesting channels: ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0},$ ${K}^{+}{K}^{\ensuremath{-}},$ and ${B}^{+}\ensuremath{\rightarrow}\ensuremath{\omega}{\ensuremath{\pi}}^{+},\ensuremath{\omega}{K}^{+}.$ For $\stackrel{\ensuremath{\rightarrow}}{B}\ensuremath{\pi}{K}^{*}$ decays, they are expected to have smaller branching ratios with more precise measurements.