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arXiv 1804.01042hep-phhep-lat
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大动量有效理论中矢量介子的光锥分布振幅

Light-cone distribution amplitudes of vector meson in large momentum effective theory

Ji Xu, Qi-An Zhang, Shuai Zhao

摘要:

在大动量有效理论框架下研究了矢量介子的超前扭转光锥分布振幅。我们导出了LCDAs和准分布振幅的匹配方程。在紫外截止和维度正则化方案中,匹配系数被确定为一个循环精度。该计算为研究LCDAs的全$x$行为和从晶格模拟中提取矢量介子的LCDAs提供了可能。

英文摘要:

We investigate the leading twist light-cone distribution amplitudes (LCDAs) of vector meson in the framework of large momentum effective theory. We derive the matching equation for the LCDAs and quasi distribution amplitudes. The matching coefficients are determined to one loop accuracy, both in the ultraviolet cut-off and dimensional regularization schemes. This calculation provides the possibility of studying the full $x$ behavior of LCDAs and extracting LCDAs of vector mesons from lattice simulations.

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