Coherent Photoproduction of Low- p T Charmonium in Peripheral Heavy Ion Collisions within the Color Dipole Model

Abstract

We calculate the centrality dependence for coherent photoproduction of very low- $p_T$ $J/\psi$ at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) energies within the impact parameter-dependent saturated color dipole model. By using the large equivalent photon fluxes, we present the differential cross-section of very low- $p_T$ $J/\psi$ produced by coherent photonuclear in peripheral heavy ion collisions. The numerical results demonstrate that our calculation agrees with $J/\psi$ data in peripheral heavy ion collisions at Relativistic Heavy Ion Collider (RHIC) energies.