Nuclear suppression at RHIC and LHC in Glauber-Gribov approach

TL;DR

This paper presents a parameter-free model based on Gribov Reggeon calculus to describe nuclear shadowing and suppression effects in high-energy collisions, successfully matching RHIC data and predicting LHC outcomes.

Contribution

It introduces a new approach to nuclear shadowing using gluon density data from HERA within the Glauber-Gribov framework, providing accurate predictions without free parameters.

Findings

Good agreement with RHIC PHENIX data on J/ψ suppression

Parameter-free predictions for LHC pPb collisions

Effective description of nuclear shadowing phenomena

Abstract

The approach to problem of nuclear shadowing based on Gribov Reggeon calculus is presented. Here the total cross section of $h A$ interaction is found in a parameter-free description, employing the new data on the gluon density of the Pomeron, measured with high precision at HERA, as input. The model is then applied for calculation of $J/\psi$ production in $d Au$ collisions at top RHIC energy. It is shown that the theoretical estimates are in a very good agreement with the PHENIX data, and further predictions for the $J/\psi$ suppression in $p Pb$ collisions at coming soon LHC are made.