论文标题
CGC I的近代精度的夸克
Quarks at next-to-eikonal accuracy in the CGC I: Forward quark-nucleus scattering
论文作者
论文摘要
我们将近代的eikonal（neik）校正得出到背景夸克传播器，这源于（i）考虑有限的纵向宽度目标，而不是无限薄的冲击波和（ii），包括夸克与背景场的横向组件的相互作用。这两个不同的对Eikonal近似的校正结合在一起，并以Neik精度为夸克传播器提供了量规协方差表达式。然后，我们将结果应用于NEIK精度上的核（或Quark）散射，考虑到非极化横截面和螺旋不对称性。
We derive Next-to-Eikonal (NEik) corrections to the background quark propagator, which stem from (i) considering a finite longitudinal width target instead of an infinitely thin shockwave and (ii) including the interaction of the quark with the transverse components of the background field. These two different corrections to the eikonal approximation combine together and provides a gauge covariant expression for the quark propagator at NEik accuracy. We then apply our results to quark (or antiquark) scattering on a nucleus at NEik accuracy, considering both unpolarized cross section and helicity asymmetry.
