We study cos 2φ azimuthal asymmetry in doubly longitudinally polarized proton-proton Drell-Yan collisions within the transverse momentum dependent factorization framework.The asymmetry arises from the convolution of ...We study cos 2φ azimuthal asymmetry in doubly longitudinally polarized proton-proton Drell-Yan collisions within the transverse momentum dependent factorization framework.The asymmetry arises from the convolution of the longitudinal transversity distribution h_(1L)^(⊥)for both protons.Using the Bacchetta-Delcarro-Pisano-RadiciSignori parameterization for the nonperturbative Sudakov form factor and the Wandzura-Wilczek approximation for collinear h_(1L)^(⊥),we predict the double spin asymmetry ALLcos2 φ at RHIC and NIC A kinematics.Our results demonstrate sensitivity to sea quark distributions,with the asymmetry reaching up to 25% for maximal sea quark contributions.These predictions highlight the potential of polarized Drell-Yan measurements to probe sea quark dynamics and advance our understanding of nucleon structures.展开更多
基金supported by Fundamental Research Program of Shanxi Province(202203021222224)Natural Science Foundation of Shanxi Normal University(JCYJ2023021)supported by the Natural Science Foundation of Henan Province(242300421377,232300421140)。
文摘We study cos 2φ azimuthal asymmetry in doubly longitudinally polarized proton-proton Drell-Yan collisions within the transverse momentum dependent factorization framework.The asymmetry arises from the convolution of the longitudinal transversity distribution h_(1L)^(⊥)for both protons.Using the Bacchetta-Delcarro-Pisano-RadiciSignori parameterization for the nonperturbative Sudakov form factor and the Wandzura-Wilczek approximation for collinear h_(1L)^(⊥),we predict the double spin asymmetry ALLcos2 φ at RHIC and NIC A kinematics.Our results demonstrate sensitivity to sea quark distributions,with the asymmetry reaching up to 25% for maximal sea quark contributions.These predictions highlight the potential of polarized Drell-Yan measurements to probe sea quark dynamics and advance our understanding of nucleon structures.
