地 点：三教301
报 告 人：姬尧 博士（University of Regensburg）
报告题目：Evolution equations for the B-meson distribution amplitudes
摘要：We present a comprehensive review of the B-meson light-cone distribution amplitudes (LCDA). They are the nonlocal matrix elements that encode the onperturbative information in the B-meson charmless decays and are, therefore, crucial ingredients in the framework of QCD factorization.The LCDAs are commonly classified by the so-called twist quantum number as it indicates the relative importance of each DA in the decay process. We are going to firstly review the one-loop evolution of the higher twist DAs, then introduce several models for these DAs, and finally discuss the evolution equations of the leading twist DA at two-loop order. Properties of the two-loop evolution equation will also be addressed.
邀请人：王玉明
