NLO corrections to J/ψ+c+c̅ photoproduction

Based on the factorization framework of nonrelativistic quantum chromodynamics, we study the associated J/ψ+c+c̅ photoproduction process at next-to-leading order in α_s and leading order in the velocity expansion. The total cross section and differential cross section in p_T^2, W and z are presented. The results indicate that the next-to-leading order corrections are substantial, and testable in experiment.