Inclusive $J/\psi$ photoproduction at the ILC within the framework of non-relativistic QCD

Abstract

Based on the non-relativistic quantum chromodynamics factorization framework, we study the inclusive $J/\psi$ photoproduction at the future high energy $e^{+}{e}^{-}$ collider, International Linear Collider(ILC), where the initial photons come from the back-scattering of laser and electron (positron). The intermediate states, $c\bar{c}$$({}^3{S}_1^{[\text{1}]}$,${}^1{S}_0^{[\text{8}]}$,${}^3{S}_1^{[\text{8}]}$,${}^3{P}_{0,1,2}^{[\text{8}]})$, and resolved photoproduction processes are considered. Numerical results show that the cross section of $J/\psi$ photoproduction at the ILC could be very large, and the single resolved process via $c\bar{c}({}^1{S}_0^{[\text{8}]})$ intermediate state dominates primarily the production. We also present various kinematic distributions for $J/\psi$ photoproduction. Combining the high luminosity of the collision, $J/\psi$ photoproduction at the ILC shall provide a good platform to test the NRQCD factorization.

Comments: 13 pages,7 figures,3 tables