J/\psi Photo- and DIS Production via Nonlinear Evolution

TL;DR

This paper applies a nonlinear evolution equation to model $J/eta$ photo- and DIS production, successfully reproducing experimental data and emphasizing the role of nonlinear effects in high-density QCD for nucleons and nuclei.

Contribution

It introduces a novel application of nonlinear evolution equations to $J/eta$ production, accounting for wave function uncertainties and nuclear effects.

Findings

Good agreement with HERA data on proton targets

Predictions for $J/eta$ production on nuclear targets

Highlights importance of nonlinear evolution in high-density QCD

Abstract

We apply our solution of the nonlinear evolution equation to the case of $J/\psi$ photo and DIS production on nucleons and nuclei targets. The uncertainty in the $J/\psi$ wave function normalization due to Fermi motion is treated as a free parameter. We obtain good reproduction of the HERA experimental data on a proton target. Calculations of $J/\psi$ mesons coherent production on nuclei targets are presented and discussed. Our analysis supports the conclusions reached in our previous studies, stressing the importance of nonlinear evolution in the kinematical domain of high-density QCD.