# $\pi -N$ Drell-Yan Process in TMD Factorization

Lu, Zhun  (School of Physics, Southeast University, Nanjing 211189, China) ; Wang, Xiaoyu  (School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China)

23 January 2019

Abstract: This article presents the review of the current understanding on the pion-nucleon Drell-Yan process from the point of view of the TMD factorization. Using the evolution formalism for the unpolarized and polarized TMD distributions developed recently, we provide the theoretical expression of the relevant physical observables, namely, the unpolarized cross section, the Sivers asymmetry, and the $\mathrm{cos}\mathrm{2}\varphi$ asymmetry contributed by the double Boer-Mulders effects. The corresponding phenomenology, particularly at the kinematical configuration of the COMPASS $\pi N$ Drell-Yan facility, is displayed numerically.

Published in: Advances in High Energy Physics 2019 (2019) 6734293