Gluon saturation effects in exclusive heavy vector meson photoproduction

Penttala, Jani; Royon, Christophe

doi:10.1016/j.physletb.2025.139394

Gluon saturation effects in exclusive heavy vector meson photoproduction

Journal Article · Thu Mar 13 00:00:00 EDT 2025 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2025.139394· OSTI ID:2530769

^[1]; Royon, Christophe ^[2]

Univ. of California, Los Angeles, CA (United States)
Univ. of Kansas, Lawrence, KS (United States)

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.

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Research Organization:: Univ. of Kansas, Lawrence, KS (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0023908

OSTI ID:: 2530769

Alternate ID(s):: OSTI ID: 3010896

Journal Information:: Physics Letters. B, Journal Name: Physics Letters. B Vol. 864; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: Netherlands

Language:: English

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