Electro-Weak Penguin and Leptonic Decays in BaBar

Abstract

Electro-weak penguin and leptonic decays provide an indirect probe for physics beyond the Standard Model and contribute to the determination of Standard Model parameters. Copious quantities of B mesons produced at the B-Factories permit precision measurements of the electro-weak penguin decays and searches for leptonic decays. We review the current experimental status of b -> s(d) gamma, B^0 -> D^{*0} gamma, b -> s l^+ l^- and finally B->tau nu decays at BaBar.Comment: 8 pages, 2 postscript figures. To appear in the proceedings of the 10th International Conference on B-Physics at Hadron Machines, BEAUTY 200