RIKEN/BNL Research Center, Building 510A, Brookhaven National Laboratory, Upton, New York 11973, USA.
Phys Rev Lett. 2011 Oct 7;107(15):152002. doi: 10.1103/PhysRevLett.107.152002. Epub 2011 Oct 5.
We study the transverse momentum dependent factorization for single spin asymmetries in Drell-Yan and semi-inclusive deep inelastic scattering processes at one-loop order. The next-to-leading order hard factors are calculated in the Ji-Ma-Yuan factorization scheme. We further derive the QCD resummation formalisms for these observables following the Collins-Soper-Sterman method. The results are expressed in terms of the collinear correlation functions from initial and/or final state hadrons coupled with the Sudakov form factor containing all order soft-gluon resummation effects. The scheme-independent coefficients are calculated up to one-loop order.
我们研究了 Drell-Yan 和半单举深度非弹性散射过程中单自旋不对称性的横向动量相关因子化，在 Ji-Ma-Yuan 因子化方案中计算了次领头阶硬因子。我们进一步根据 Collins-Soper-Sterman 方法为这些可观测量推导出 QCD 重求和形式。结果表示为初始和/或末态强子的共线关联函数，与包含所有阶软胶子重求和效应的 Sudakov 形成因子相结合。方案无关系数计算到一阶。
