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Probing the leading-twist transverse-momentum-dependent parton distribution function<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>h</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mi>T</mml:mi></mml:mrow><mml:mo>⊥</mml:mo></mml:msubsup></mml:math>via the polarized proton-antiproton Drell-Yan process
We show that the polarized proton-antiproton Drell-Yan process is ideal to probe the pretzelosity distribution (${h}_{1T}^{\ensuremath{\perp}}$), which is one of the new transverse-momentum-dependent parton distributions of the nucleon. We present predictions of the $\mathrm{cos}(2\ensuremath{\phi}+{\ensuremath{\phi}}_{a}\ensuremath{-}{\ensuremath{\phi}}_{b})$ asymmetry in the transversely polarized proton-antiproton Drell-Yan process at PAX kinematics and find that the results …