Speaker
Alexander Manashov
(Hamburg University)
Description
The B-meson distribution amplitude is defined by the matrix element of a heavy-light quark operator between the vacuum and B-meson states. The scale dependence of the corresponding DA is governed by the renormalization group equation for this operator. At one loop the corresponding evolution kernel was derived by Lange and Neubert. I'll argue that the form of the kernel is strongly restricted by the conformal symmetry and present the answer for the two-loop kernel.
Primary author
Alexander Manashov
(Hamburg University)
