标题： 三重扭曲分布及其在双极化Drell-Yan过程中的出现 显示英文标题

标题： Twist-three distributions and their appearance in the doubly-polarized Drell-Yan process

摘要： 扭曲三阶分布$g_2(x)$和$h_2(x)$被定义为极化强子态之间的夸克场矩阵元。 它们可以表示为夸克质量与胶子算符的组合，在此之后可以推导出$g_2$的 Burkhardt-Cottingham 积分规则，并且可以得到$h_2$的类似积分规则。 它们在 Drell-Yan 双自旋不对称性$A_{LT}$中的作用被解释。 显示英文摘要

摘要： The twist-three distributions $g_2(x)$ and $h_2(x)$ are defined as quark-field matrix elements between polarized hadron states. They can be written in terms of quark-mass and gluonic operators, after which the Burkhardt-Cottingham sum rule for $g_2$ can be derived and a similar sum rule for $h_2$. Their role in the Drell-Yan double-spin asymmetry $A_{LT}$ is explained.