Coherent photoproduction of light vector mesons off nuclear targets in the dipole picture

Abstract

We study the coherent photoproduction of light vector mesons in Pb-Pb collisions in the framework of color dipole approach. We employ the Glauber–Gribov formalism supplemented by an effective suppression factor RG accounting for the gluon shadowing correction. We adjust the latter to reproduce the deep inelastic structure function F2 (E665) and ρ meson photoproduction (ALICE) data. We achieve a good description of the available data points with RG=0.85 at scale Mρ2/4=0.15 GeV2. In addition, employing this suppression factor, we present predictions for coherent ρ(2S), ω(1S,2S) and ϕ(1S,2S) photoproduction observables using the holographic vector meson wave functions