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.
8 page, 2 figures
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