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Heavy Quarkonium Production in Single Transverse Polarized High Energy Scattering
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We formulate the single transverse spin asymmetry in heavy quarkonium production in lepton-nucleon and nucleon-nucleon collisions in the non-relativistic limit. We find that the asymmetry is very sensitive to the production mechanism. The final state interactions with the heavy quark and antiquark cancel out among themselves when the pair are produced in a color-single configuration, or cancel out with the initial state interaction in pp scattering when they are in color-octet. As a consequence, the asymmetry is nonzero in ep collisions only in the color-octet model, whereas in pp collisions only in the color-singlet model.
Forward citations
Cited by 1 Pith paper
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Sivers Asymmetry in Photoproduction of $J/\psi$ and Jet at the EIC
Photoproduction of J/psi+jet at the EIC shows a gluon-dominated Sivers asymmetry of up to 6-8% in the models studied, making it a promising probe of the gluon Sivers function.
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