标题： 底强子的独占衰变 显示英文标题

标题： Exclusive Decays of Beauty Hadrons

摘要： 从实验测量的$B$衰变中推导弱相互作用性质的主要困难在于控制强相互作用效应。 在本次演讲中，我回顾了对单态轻子和半轻子衰变振幅的理论计算现状，在后一种情况下特别强调了提取$V_{cb}$和$V_{ub}$矩阵元的方法。 显示英文摘要

摘要： The principal difficulty in deducing weak interaction properties from experimental measurements of $B$-decays lies in controlling the strong interaction effects. In this talk I review the status of theoretical calculations of the amplitudes for exclusive leptonic and semileptonic decays, in the latter case with special emphasis on the extraction of the $V_{cb}$ and $V_{ub}$ matrix elements.