Threshold Resummation for Drell-Yan Process in Soft-Collinear Effective   Theory
  We consider Drell-Yan process in the threshold region $z\to 1$ where large logarithms appear due to soft-gluon radiations. We present a soft-collinear effective theory approach to re-sum these Sudakov-type logarithms following an earlier treatment of deep inelastic scattering, and the result is consistent with that obtained earlier through perturbative QCD factorization 
Ahmad Idilbi and Xiangdong Ji