出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：I discuss two recent aspects of semi-leptonic decays. First I will consider a few novel developments in the calculation of higher orders in the Heavy Quark Expanson for the inclusive width B ! Xc` ¯ n. Secondly I shall report on an updated calculation of B ! p` ¯ n relevant for Vub and comment on the role of B!t ¯ n in the determination of Vub.
