Long distance effects in semi-inclusive B decays

Abstract

We discuss some issues on factorization of long distance effects for semi-inclusive B decay spectra in full QCD and in the effective theory.

Comments: Contribution to the Proceedings of 1st Workshop on Theory, Phenomenology and Experiments in Heavy Flavour Physics, Anacapri, Italy, 29-31 May, 2006, to be published on Nucl. Phys. B Proceedings