Exclusive Nonleptonic B Decays from QCD Light-Cone Sum Rules

Abstract

We are going to review recent advances in the theory of exclusive nonleptonic B decays. The emphasis is going to be on the factorization hypothesis and the role of nonfactorizable contributions for nonleptonic B decays. In particular, we will discuss in more detail calculations of nonfactorizable contributions in the QCD light-cone sum rule approach and their implications to the $B\to \pi \pi$ and $B\to J/\psi K$ decays.

Comments: 15 pages, 7 figures included, typos corrected, invited talk at Int. School "Heavy Quark Physics", May 27 - June 04 2002, JINR, Dubna, Russia; to be published in the Springer series Lecture Notes in Physics