|V_{ub}| and Perturbative QCD Effects in the $B\to \pi$ Transition Form Factor

Abstract

We report on recent improvements for the $B\to \pi$ form factor. The updated value of $|V_{ub}|$ is presented.

Comments: 7 pages, Latex, 3 figures included, Talk given by O. Yakovlev at IV Int. Workshop on Progress in Heavy Quark Physics, Rostock, September 20-22