| Issue |
EPJ Web Conf.
Volume 339, 2025
12th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (Hard Probes 2024)
|
|
|---|---|---|
| Article Number | 06001 | |
| Number of page(s) | 6 | |
| Section | Contributed Talk: Nuclear PDFs, Saturation and Early Time Dynamics | |
| DOI | https://doi.org/10.1051/epjconf/202533906001 | |
| Published online | 05 November 2025 | |
https://doi.org/10.1051/epjconf/202533906001
Top-quark pair production in heavy-ion collisions with the ATLAS experiment
1 AGH University of Krakow, al. Adama Mickiewicza 30, 30-059 Kraków, Poland
2 Johannes Gutenberg University Mainz, Saarstr. 21, 55122 Mainz, Germany
* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 5 November 2025
Abstract
Measurements of top quarks in heavy-ion collisions are expected to provide novel probes of nuclear modifications to parton distribution functions as well as to bring unique information about the evolution of strongly interacting matter. We report the observation of the top-quark pair production in protonlead collisions at the centre-of-mass energy of 8.16 TeV in the ATLAS experiment at the LHC. Top-quark pair production is measured in the lepton+jets and the dilepton channels, with a significance well above 5 standard deviations in each channel separately. The results from the measurement of the nuclear modification factor RpA are also presented.
© The Authors, published by EDP Sciences, 2025
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