Review of the PQCD approach to exclusive B decays

Abstract

I review important aspects of the perturbative QCD approach to exclusive $B$ meson decays, concentrating on factorization theorem, gauge invariance, end-point singularities, $k_T$ and threshold resummations, power counting, penguin enhancement, and CP asymmetries.

Comments: 5 pages, talk presented at the 4th International Workshop on B physics and CP violation, Ise, Japan, Feb., 2001