Three-dimensional parton distribution functions $g_{1T}$ and $h_{1L}^\perp$ in the polarized proton-antiproton Drell-Yan process

TL;DR

This paper predicts measurable spin asymmetries in polarized proton-antiproton Drell-Yan processes at FAIR, aiming to explore two specific three-dimensional parton distribution functions that reveal detailed nucleon structure.

Contribution

It provides the first predictions for double spin asymmetries related to $g_{1T}$ and $h_{1L}^ot$ in polarized proton-antiproton Drell-Yan, highlighting FAIR's potential to access these distributions.

Findings

FAIR can effectively measure $g_{1T}$ and $h_{1L}^ot$ distributions.

Predicted asymmetries are significant for experimental detection.

Supports detailed three-dimensional nucleon structure studies.

Abstract

We present predictions of the unweighted and weighted double spin asymmetries related to the transversal helicity distribution $g_{1T}$ and the longitudinal transversity distribution $h_{1L}^\perp$, two of eight leading-twist transverse momentum dependent parton distributions (TMDs) or three-dimensional parton distribution functions (3dPDFs), in the polarized proton-antiproton Drell-Yan process at typical kinematics on the Facility for Antiproton and Ion Research (FAIR). We conclude that FAIR is ideal to access the new 3dPDFs towards a detailed picture of the nucleon structure.