Projects per year
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.
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 language | English |
---|---|
Article number | 141 |
Pages (from-to) | 1-77 |
Number of pages | 77 |
Journal | Journal of High Energy Physics |
Volume | 2023 |
Issue number | 7 |
DOIs | |
Publication status | Published - 17 Jul 2023 |
Keywords / Materials (for Non-textual outputs)
- Hadron-Hadron Scattering
- Top Physics