Diffractive vector meson production in ultraperipheral heavy ion collisions from the Color Glass Condensate

TL;DR

This paper calculates cross sections for diffractive J/Ψ and Ψ(2S) production in ultraperipheral heavy ion collisions using dipole models fitted to HERA data, showing good agreement with ALICE measurements and highlighting model dependence in normalization.

Contribution

It introduces a detailed calculation of diffractive vector meson production in heavy ion collisions using dipole models constrained by HERA data, comparing with experimental results.

Findings

Good description of ALICE data achieved

Normalization shows large model dependence

Rapidity dependence is more tightly constrained

Abstract

We compute cross sections for incoherent and coherent diffractive J/$\Psi$ and $\Psi(2S)$ production in ultraperipheral heavy ion collisions. The dipole models used in these calculations are obtained by fitting the HERA deep inelastic scattering data and compared with available electron-proton diffraction measurements. We obtain a reasonably good description of the available ALICE data. We find that the normalization of the ultraperipheral cross section has large model dependence, but the rapidity dependence is more tightly constrained.