Speaker
Iwona Grabowska-Bold
(AGH University of Krakow (PL))
Description
Measurements of top-quark pairs in heavy-ion collisions are expected to provide novel probes of nuclear parton distribution functions at high Bjoerken-$x$ values, which are difficult to access experimentally using other available probes. We 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. 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 nuclear modification factor $R_{p\mathrm{A}}$ is also measured for the first time for the top-quark pair process.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | ATLAS Collaboration |
Author
Iwona Grabowska-Bold
(AGH University of Krakow (PL))
