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Accessing the subleading-twist B-meson light-cone distribution amplitude with Large-Momentum Effective Theory
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Accessing the subleading-twist $B$-meson light-cone distribution amplitude with Large-Momentum Effective Theory
abstract
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.
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