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arXiv · 1103.4201

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

Jiacai Zhu·Bo-Qiang Ma
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Abstract

We show that the polarized proton-antiproton Drell-Yan process is ideal to probe the pretzelosity distribution ($h_{1T}^\perp$), which is one of the new transverse-momentum-dependent parton distributions of the nucleon. We present predictions of the $\cos(2ϕ+ ϕ_a - ϕ_b)$ 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 $\sin(3ϕ_h - ϕ_S)$ asymmetry in the semi-inclusive deep inelastic scattering process at HERMES, COMPASS, and JLab kinematics. We conclude that the $\cos(2ϕ+ ϕ_a - ϕ_b)$ asymmetry in the PAX experiment can probe the new physical quantity of the pretzelosity distribution.

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Jiacai Zhu, Bo-Qiang Ma. 2011-03-22. Probing pretzelosity $h^{\perp}_{1T}$ via the polarized proton-antiproton Drell-Yan process. https://doi.org/10.1103/physrevd.82.114022

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