PQCD approach to exclusive B decays

Abstract

I review the recent progress on the perturbative QCD approach to exclusive $B$ meson decays, discussing the comparison of collinear and $k_T$ factorizations, the CP asymmetry in the $B^0\to {\pi }^{+}{\pi }^{-}$ decay, penguin enhancement, the branching ratio of the $B^0\to D^0{\pi }^0$ decay, and three-body nonleptonic decays.

Comments: 11 pages, based on talks presented at Flavor Physics and CP Violation, Philadelphia, USA, May 2002, at the 3rd Workshop on Higher Luminosity B Factories, Kanagawa, Japan, Aug. 2002, and at Summer Institute 2002, Yamanashi, Japan, Aug. 2002