Work

Gluon saturation effects in exclusive heavy vector meson photoproduction

Year: 2025

Type: article

Abstract: We study exclusive J / ψ and ϒ photoproduction for proton and Pb targets in the high-energy limit, with the energy dependence computed using the linear Balitsky–Fadin–Kuraev–Lipatov and the nonlinear Balitsky–Kovchegov evolution equations. The difference between these two evolution equations can be directly attributed to gluon saturation physics. We find that for proton targets there is no difference between the two approaches at the energies of the currently available data, while for Pb targets in J / ψ production the data shows a clear preference for the evolution with gluon saturation.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2025.139394

Authors: Jani Penttala, Christophe Royon

Institutions: University of California, Los Angeles, University of Kansas

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond