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Matching the meson quasidistribution amplitude in the RI/MOM scheme

机译:在RI / MOM方案中匹配介子准分布幅度

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The x dependence of light-cone distribution amplitude (LCDA) can be directly calculated from a quasidistribution amplitude (DA) in lattice QCD within the framework of large-momentum effective theory. In this paper, we study the one-loop renormalization of the quasi-DA in the regularization-independent momentum subtraction (RI/MOM) scheme. The renormalization factor for the quasiparton distribution function can be used to renormalize the quasi-DA provided that they are implemented on lattice and in perturbation theory in the same manner. We derive the one-loop matching coefficient that matches quasi-DA in the RI/MOM scheme onto LCDA in the MS ˉ scheme. Our result provides the crucial step to extract the LCDAs from lattice matrix elements of quasi-DAs.
机译:在大动量有效理论的框架内,可以从晶格QCD中的准分布幅度(DA)直接计算出光锥分布幅度(LCDA)的x依赖性。在本文中,我们研究了与正则无关的动量减法(RI / MOM)方案中的准DA的单环重新归一化。如果准格子分布函数在晶格上和扰动理论中以相同的方式实现,则可以使用拟parton分布函数的重新归一化因子对准DA进行重新归一化。我们推导将RI / MOM方案中的准DA匹配到MS方案中的LCDA的单环匹配系数。我们的结果提供了从准DA的晶格矩阵元素中提取LCDA的关键步骤。

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