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/ψ 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/ψ produced by coherent photonuclear in peripheral heavy-ion collisions. The numerical results demonstrate that our calculation are agree with J/ψ data in peripheral heavy ion collisions at Relativistic Heavy Ion Collider (RHIC) energies.

Regge phenomenology and coherent photoproduction of charmonium in peripheral heavy ion collisions

“…From the theoretical point of view the coherent photoproduction of quarkonium in peripheral heavy ion collisions has been addressed in a number of works [5,[7][8][9][10][11][12][13][14]. In Ref.…”

“…Study presented in Ref. [14] considers standard EPA approximation and color dipole framework. Parton saturation models for the dipole-proton cross section were utilized and the numerical calculation compared to the RHIC data.…”

Flavor-dependent photoproduction in heavy-ion collisions

“…Comparing the wavelength of the equivalent photon with the nucleus size, the photoproduction can be divided into coherent and incoherent photoproduction. In the case of coherent photoproduction, the wavelength of the equivalent photon is larger than the nucleus radius and the photon interaction with the whole nucleus [25][26][27][28][29][30]. If the wavelength of the equivalent photon is short enough to distinguish and then the nucleons or even partons in nucleons, this is known as incoherent photoproduction [31,32] Unlike the photoproduction at UPC, one may need to consider both cold nuclear effects [33][34][35][36] and hot nuclear effects [37][38][39][40][41][42] in the peripheral hadronic heavy ion collisions (HHIC).…”