标题： 横向动量依赖性在胶子分布和碎裂函数中 显示英文标题

标题： Transverse momentum dependence in gluon distribution and fragmentation functions

摘要： 我们研究自旋1/2强子的二阶扭曲胶子分布函数，强调胶子的内在横向动量。 这些函数在散射过程如单侧轻子产生或Drell-Yan散射的逆硬尺度的一阶中是相关的，或者更一般地，在至少涉及两个强子的硬过程中是相关的。 它们出现在方位角不对称性中。 为了未来对这些可观测量的估计，我们讨论这些函数的具体限制。 显示英文摘要

摘要： We investigate the twist two gluon distribution functions for spin 1/2 hadrons, emphasizing intrinsic transverse momentum of the gluons. These functions are relevant in leading order in the inverse hard scale in scattering processes such as inclusive leptoproduction or Drell-Yan scattering, or more general in hard processes in which at least two hadrons are involved. They show up in azimuthal asymmetries. For future estimates of such observables, we discuss specific bounds on these functions.