Year: 2026
Type: article
Abstract: Measurements of top-quark pairs in heavy-ion collisions are expected to provide novel probes of nuclear parton distribution functions at high Bjorken-x values, which are difficult to access experimentally using other available probes. In this report, the observation of top-quark pair production in proton-lead collisions at the centre-of-mass energy of 8.16 TeV in the ATLAS experiment at the LHC is discussed. Top-quark pair production is measured in the lepton+jets and the di-lepton channels, with a significance well above 5 standard deviations in each channel separately. The nuclear modification factor RpA is also measured for the first time for the top-quark pair process.
Author: Iwona Grabowska-Bold
Institution: AGH University of Krakow
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: Infrastruktura PL-Grid
OpenAlex ID: W7155197359
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