论文标题
改善DRELL - 通过方位角切割LHC在LHC处的小X Partons的YAN探针
Improving the Drell--Yan probe of small x partons at the LHC via an azimuthal angle cut
论文作者
论文摘要
Drell-yan Lepton对在低dilepton质量和LHC处的小X的预测通常具有很大的依赖性。可以通过确定“最佳分解量表”来减少这一点。在本文中，我们通过正确地考虑到sudakov效应，通过在瘦素的横向动量之间以方位角的角度施加截止量来减少这种量表。这使人们可以在较小的尺度上探测Parton分布，从而消除当前理论不确定性的大多数。
Predictions for Drell--Yan lepton pair production at low dilepton mass and small x at the LHC usually have a large scale dependence. This can be decreased by determining an "optimal factorization scale". In this paper, we reduce this scale by imposing a cutoff in azimuthal angle between the transverse momentum of the leptons, properly taking into account Sudakov effects. This allows one to probe the parton distributions at smaller scales eliminating most of the current theoretical uncertainty.
