Time：2020/6/13, 16:00-17:00 (GMT＋8)
Tencent Meeting ID: 871 521 023
Abstract : The B-meson light-cone distribution amplitudes (LCDAs) are matrix elements of operators involving one heavy-quark field sandwiched between the B-meson state and the vacuum. In this talk, I will present the recent developments regarding the evolution of higher-twist LCDAs. In particular, I will discuss various constraints the higher-twist DAs must satisfy and how to construct models that fulfill these constraints. I will demonstrate that the renormalization group equations (RGEs) of higher-twist operators are completely integrable from spin chain models. I will also remark on the recent progress of the two-loop evolution kernel of the leading-twist B-meson DA.
About the speaker：Dr. Yao Ji, now is an assistant researcher in particle physics atUniversit?t Siegen, Germany. He was a postdoctoral researcher (2016-2019) at Regensburg University, Germany. He have completed his Ph.D (2010-2016) from Arizona State University, USA under the supervision of Prof. Andrei V. Belitsky. He did his B.Sc in physics from Xidian University in 2010, Xian, China.