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Based on the factorization framework of nonrelativistic quantum chromodynamics, we study the associated J/+c+c photoproduction process at next-to-leading order in ₛ and leading order in the velocity expansion. The total cross section and differential cross section in pT², W and z are presented. The results indicate that the next-to-leading order corrections are substantial, and testable in experiment.
Feng et al. (Thu,) studied this question.