The asymmetry $A_{LL}^{\cos 2\varphi }$ in the polarized proton-proton Drell-Yan process within TMD factorization

Hui Li, Ting Hu, Liang-Liang Liu +2

We study the $\cos 2\varphi$ azimuthal asymmetry in doubly longitudinally polarized proton-proton Drell-Yan collisions within the transverse momentum dependent factorization framework. Th…