论文标题
GTMD和独家双drell-Yan的分解
GTMDs and the factorization of exclusive double Drell-Yan
论文作者
论文摘要
已经提出了不同的独家过程，以访问没有分解证明的广义横向动量分布（GTMD），这允许严格定义GTMD。使用软共线性有效理论，我们首次得出了差分横截面的分解，用于独家双层式YAN过程，用于独家双层drell-yan过程n至n'gamma* gamma* gamma* gam* gamma* to n'（l^+l^ - ）（l^+l^ - ），对于函数的小横向计算，均可用的小横向计算，gtm and obloble claper and of Photiment waver and conter and of thapers waver and cont。 （LCWFS）。我们发现，该过程的硬因素可以从单个包容性的DREL-YAN产生中获得，以便可以在QCD中的高订单下恢复对数。我们还讨论了GTMD和LCWF的演变。
Different exclusive processes have been proposed to access the generalized transverse momentum dependent distributions (GTMDs) with no proof of factorization, which allows to rigorously define the GTMDs. Using Soft Collinear Effective Theory we derive for the first time the factorization of the differential cross section for the exclusive double Drell-Yan process for the exclusive double Drell-Yan process pion N to N' gamma* gamma* to N' (l^+l^-)(l^+l^-), for small transverse momenta of the photons in terms of a perturbatively calculable hard factor, GTMDs and light-cone wave functions (LCWFs). We find that the hard factor of the process can be obtained from single inclusive Drell-Yan production so that one can resum logarithms at high orders in QCD. We also discuss the evolution of the GTMDs and the LCWFs.
