Inclusive and differential cross-sections for dilepton t¯t production measured in √s = 13 TeV pp collisions with the ATLAS detector

ATLAS Publications, S. Alderweireldt, T.M. Carter, A. Hasib, M.P. Heath, V.A. Parrish, E.A. Pender, E.P. Takeva, N. Themistokleous, E.M. Villhauer, E. Zaid

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Differential and double-differential distributions of kinematic variables of lep-
tons from decays of top-quark pairs (t¯t) are measured using the full LHC Run 2 data sample collected with the ATLAS detector. The data were collected at a pp collision energy of √s = 13 TeV and correspond to an integrated luminosity of 140 fb−1. The measurements use events containing an oppositely charged eμ pair and b-tagged jets. The results are compared with predictions from several Monte Carlo generators. While no prediction is found to be consistent with all distributions, a better agreement with measurements of the lepton pT distributions is obtained by reweighting the t¯t sample so as to reproduce the top-quark pT distribution from an NNLO calculation. The inclusive top-quark pair production cross-section is measured as well, both in a fiducial region and in the full phase-space. The total inclusive cross-section is found to be
σt¯t = 829 ± 1 (stat) ± 13 (syst) ± 8 (lumi) ± 2 (beam) pb, where the uncertainties are due to statistics, systematic effects, the integrated luminosity
and the beam energy. This is in excellent agreement with the theoretical expectation.
Original languageEnglish
Article number141
Pages (from-to)1-77
Number of pages77
Journal Journal of High Energy Physics
Volume2023
Issue number7
DOIs
Publication statusPublished - 17 Jul 2023

Keywords / Materials (for Non-textual outputs)

  • Hadron-Hadron Scattering
  • Top Physics

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