English

Probing pretzelosity $h^{\perp}_{1T}$ via the polarized proton-antiproton Drell-Yan process

High Energy Physics - Phenomenology 2015-03-19 v1 High Energy Physics - Experiment Nuclear Experiment Nuclear Theory

Abstract

We show that the polarized proton-antiproton Drell-Yan process is ideal to probe the pretzelosity distribution (h1Th_{1T}^\perp), which is one of the new transverse-momentum-dependent parton distributions of the nucleon. We present predictions of the cos(2ϕ+ϕaϕb)\cos(2\phi + \phi_a - \phi_b) asymmetry in the transversely polarized proton-antiproton Drell-Yan process at PAX kinematics and find that the results are significantly larger compared with those of the sin(3ϕhϕS)\sin(3\phi_h - \phi_S) asymmetry in the semi-inclusive deep inelastic scattering process at HERMES, COMPASS, and JLab kinematics. We conclude that the cos(2ϕ+ϕaϕb)\cos(2\phi + \phi_a - \phi_b) asymmetry in the PAX experiment can probe the new physical quantity of the pretzelosity distribution.

Keywords

Cite

@article{arxiv.1103.4201,
  title  = {Probing pretzelosity $h^{\perp}_{1T}$ via the polarized proton-antiproton Drell-Yan process},
  author = {Jiacai Zhu and Bo-Qiang Ma},
  journal= {arXiv preprint arXiv:1103.4201},
  year   = {2015}
}

Comments

5 pages, 3 figures, final version in journal publication