Possible large direct CP violations in charmless B meson decays: Summary report on the PQCD method

We discuss the perturbative QCD approach for the exclusive two body B meson decays to light mesons. We briefly review its ingredients and some important theoretical issues on the factorization approach. We show numerical results which are compatible with present experimental data for charmless B meson decays. In particular, we predict the possibility of large direct CP violation effects in B⁰→π⁺π^-[(23±7%)] and B⁰→K⁺π^-[(-17±5%)]. In the last section we investigate two methods to determine the weak phases φ₂ and φ₃ from →Bππ,Kπ processes. We obtain bounds on φ₂ and φ₃ from present experimental measurements.