Accessing the subleading-twist B-meson light-cone distribution amplitude with large-momentum effective theory

Within the framework of large-momentum effective theory (LaMET), we propose a hard-collinear factorization formula to extract the subleading-twist B -meson light-cone distribution amplitude (LCDA) from the quasidistribution amplitude calculated on the lattice. The one -loop matching coefficient and an integro-differential equation governing the evolution of the quasidistribution amplitude are derived. Our results could be useful either in evaluating the subleading-twist B -meson LCDA on the lattice or in the understanding the feasibility of LaMET on higher-twist distributions.