| Issue |
EPJ Web Conf.
Volume 364, 2026
XXXI International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions “Quark Matter 2025”
|
|
|---|---|---|
| Article Number | 13002 | |
| Number of page(s) | 4 | |
| Section | Physics of Ultraperipheral Collisions | |
| DOI | https://doi.org/10.1051/epjconf/202636413002 | |
| Published online | 17 April 2026 | |
https://doi.org/10.1051/epjconf/202636413002
Investigating subnucleonic structures via new measurements of incoherent J/ψ photoproduction in ultra-peripheral Pb-Pb collisions with ALICE
Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Czech Republic
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Published online: 17 April 2026
Abstract
Ultra-peripheral collisions of heavy ions provide a unique environment to study the gluon structure of nuclei through photon-induced reactions. In particular, the incoherent photoproduction of J/ψ vector meson is sensitive to event-by-event fluctuations of the gluon field at nucleon and subnucleonic scales. We report new ALICE measurement of incoherent J/ψ production in Pb–Pb collisions at √sNN = 5.02 TeV, differential in both photon-nucleus energy and Mandelstam-|t|. At low |t|, the cross section rises with increasing photon-nucleus energy, while at larger |t| the growth is suppressed with respect to the trend at low |t|. This measurement represents the first study of incoherent photoproduction at the LHC performed as a function of both WγPb,n and |t|.
© The Authors, published by EDP Sciences, 2026
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