NLO corrections to $J/\psi+c+\bar{c}$ photoproduction

TL;DR

This paper calculates the next-to-leading order quantum chromodynamics corrections to the photoproduction of a J/psi meson with charm quarks, providing more accurate predictions for experimental comparison.

Contribution

It presents the first NLO calculations for J/psi + charm photoproduction within the nonrelativistic QCD framework, improving theoretical precision.

Findings

NLO corrections are significant and enhance the total cross section.

Differential cross sections in $p_T^2$, $W$, and $z$ are provided.

Results are testable in current or future experiments.

Abstract

Based on the factorization framework of nonrelativistic quantum chromodynamics, we study the associated $J/\psi+c+\bar{c}$ photoproduction process at next-to-leading order in $\alpha_s$ 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.