| Issue |
EPJ Web Conf.
Volume 364, 2026
XXXI International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions “Quark Matter 2025”
|
|
|---|---|---|
| Article Number | 13001 | |
| Number of page(s) | 5 | |
| Section | Physics of Ultraperipheral Collisions | |
| DOI | https://doi.org/10.1051/epjconf/202636413001 | |
| Published online | 17 April 2026 | |
https://doi.org/10.1051/epjconf/202636413001
New probes of nuclear gluon dynamics through photoproduction of charm in inelastic ultra-peripheral PbPb collisions with ALICE
University of Oslo
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Published online: 17 April 2026
Abstract
In an ultra-peripheral collision, a photon can interact with a gluon in the target nucleus and produce a pair of charm quarks, while the target nucleus breaks up (inelastic scattering). These charm quarks then fragment and are observed as open charm hadrons or vector mesons. This process has been used in e-p collisions to set stringent limits on the proton gluon distribution at low-x. The current measurements can provide similar constraints on the much less known nuclear gluon distributions. ALICE has measured the transverse momentum distribution of inelastically photoproduced D0 at midrapidity, in Pb-Pb collisions at √sNN = 5.36 TeV. The distribution is measured down to pT = 0 for the first time. The results are compared to model calculations.
© The Authors, published by EDP Sciences, 2026
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