论文标题
在小X上的横向动量依赖分布的规格上不变性
On gauge invariance of transverse momentum dependent distributions at small-x
论文作者
论文摘要
小X处的横向动量依赖性（TMD）分布表现出丰富的无限扭曲结构，该结构包括领先的扭曲（党派）分布以及Gluon饱和物理。最近，最近建立了中等X和小X的标准TMD框架之间的连接。在这种情况下，我们表明，可以根据横向规链链路来制定光线锥线的运算符。这种小型X运算符的新公式允许与标准领先的扭转Gluon TMD分布进行直接匹配，并为计算小X的TMD分布提供了有效且一般的处方，而不是领先的扭曲。
Transverse momentum dependent (TMD) distributions at small x exhibit a rich infinite twist structure that encompasses the leading twist (partonic) distributions as well as the physics of gluon saturation. Progress to further the connection between the standard TMD framework at moderate x and small x has been recently made. In this context, we show that light cone Wilson line operators at small-x can be formulated in terms of transverse gauge links. This new formulation of small x operators allows a direct matching with the standard leading twist gluon TMD distributions and provides an efficient and general prescription for computing TMD distributions at small x beyond leading twist.
