COMPATIBILITY BETWEEN THEORY PREDICTIONS AT NNLO QCD ACCURACY AND EXPERIMENTAL DATA FOR TOP–ANTITOP HADROPRODUCTION

We extract the top-quark mass value in the on-shell renormalization scheme from the comparison of theoretical predictions for pp → tt̄+ X at next-to-next-to-leading order QCD accuracy with the experimental data collected by the ATLAS and CMS collaborations for absolute total, normalized single- and double-differential cross sections. For the theory computations, we use the MATRIX framework, interfaced to PineAPPL for the generation of grids of predictions, which are efficiently used a posteriori during the fit, performed within xFitter. We take several state-of-the-art parton distribution functions (PDFs). The results of the fit using as input different PDF sets agree with each other within 1 σ uncertainty, whereas some datasets related to tt̄ decay in different channels point towards top-quark mass values in slight tension among each other, although still compatible within 2.5σ accuracy. Our results are compatible with the PDG 2022 top-quark pole-mass value. © 2024 Jagiellonian University. All rights reserved.