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

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arxiv 1103.4201 v1 pith:VGHGTE2L submitted 2011-03-22 hep-ph hep-exnucl-exnucl-th

classification hep-phhep-exnucl-exnucl-th
keywords processasymmetrydrell-yanpolarizedpretzelosityproton-antiprotondistributionkinematics
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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 $\cos(2\phi + \phi_a - \phi_b)$ 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 $\sin(3\phi_h - \phi_S)$ asymmetry in the semi-inclusive deep inelastic scattering process at HERMES, COMPASS, and JLab kinematics. We conclude that the $\cos(2\phi + \phi_a - \phi_b)$ asymmetry in the PAX experiment can probe the new physical quantity of the pretzelosity distribution.

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  1. Six-dimensional light-front Wigner distributions of the proton

    hep-ph 2025-05 conditional novelty 6.0 of 10

    All 16 leading-twist six-dimensional light-front quark Wigner distributions for the proton are computed in a spectator-diquark model, extending earlier five-dimensional and unpolarized-only results.

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