Weighted asymmetry from pretzelosity in SIDIS at electron ion colliders
arXiv:2104.05173 · doi:10.1016/j.physletb.2021.136598
Abstract
We investigate the transverse momentum weighted azimuthal asymmetry with a modulation in electroproduction of charged pion production off the transversely polarized proton. The asymmetry is contributed by the product of the second transverse-moment of the pretzelosity distribution function and the first transverse-moment of the Collins function. Using the extracted result for the proton pretzelosity and the available parametrization for the pion Collins function, we numerically predict the -weighted asymmetry for charged pion production at electron ion colliders (EICs). It is found that the weighted asymmetry is around 2 percent in the kinematics region of EICs. Our results show that the planned high luminosity electron ion colliders could be feasible to access pretzelosity in the near future.
arXiv comment8 page, 2 figures
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