Speaker
Ji-Hao Wang
(Institute of Theoretical Physics，Chinese Academy of Sciences)
Description
We determine the leading-twist light-cone distribution amplitude (LCDA) moments of mesons on MILC ensembles using the HYP-smeared clover action, employing both twist-2 local operators and quasi-DA correlators. Based on the twist-2 local operator, we obtain highly precise values for the meson LCDA moments at the physical point and in the continuum limit. By comparing the results from these two methods, we conclude that higher-twist contributions can be effectively suppressed at large momenta, and that the current deviations are mainly due to excited-state contamination. Furthermore, we have identified a computational scheme that can significantly suppress excited-state contamination.
Authors
Ji-Hao Wang
(Institute of Theoretical Physics，Chinese Academy of Sciences)
Jun Hua
Meng-Chu Cai
Tong-Wei Lin
Yi-Bo Yang
