Latest ALICE results on J/$\psi$ photoproduction in ultra-peripheral collisions at the LHC
Abstract
Ultra-peripheral collisions (UPCs), studied using the ALICE detector, allow us to investigate the low-$x$ behavior of the gluon distribution of the colliding particles. Two new measurements of coherent J/$\psi$ photoproduction cross section from Pb-Pb UPCs at $\sqrt{s_{\rm NN}}=5.02$ TeV are presented: the first measurement of the $|t|$-dependence of the cross section providing a new tool to investigate the transverse gluonic structure at low Bjorken-$x$ and a rapidity-differential measurement at midrapidity allowing us to provide stringent constraints on nuclear gluon shadowing and saturation models. In addition, prospects for heavy vector meson photoproduction measurements in LHC Run 3 and 4 are presented.
- Publication:
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arXiv e-prints
- Pub Date:
- July 2021
- DOI:
- 10.48550/arXiv.2107.13284
- arXiv:
- arXiv:2107.13284
- Bibcode:
- 2021arXiv210713284H
- Keywords:
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- Nuclear Experiment;
- High Energy Physics - Experiment
- E-Print:
- Submission to SciPost, Proceedings of DIS 2021 conference, 12-16 April 2021