Differential and double-differential distributions of kinematic variables of leptons from decays of top-quark pairs (tt¯) 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 p T distributions is obtained by reweighting the tt¯ sample so as to reproduce the top-quark p T 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 σtt¯=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. [Figure not available: see fulltext.]

Inclusive and differential cross-sections for dilepton 𝒕𝒕¯ production measured in √𝒔 = 13 TeV 𝒑 𝒑 collisions with the ATLAS detector / Betti, A.; De Salvo, A.; Di Domenico, A.; Dionisi, C.; Bini, C.; Luci, C.; Pompa Pacchi, E.; Morodei, F.; Lacava, F.; Safai Tehrani, F.; Artoni, G.; Santi, L.; Martinelli, L.; Maiani, L; Bauce, M.; Gauzzi, P.; Gentile, S.; Falciano, S.; Giagu, S.; Ippolito, V.; Padovano, G.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 7(2023), pp. 1-71. [10.1007/JHEP07(2023)141]

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

Betti A.;De Salvo A.;Di Domenico A.;Dionisi C.;Bini C.;Luci C.;Pompa Pacchi E.;Morodei F.;Lacava F.;Safai Tehrani F.;Artoni G.;Santi L.;Martinelli L.;Maiani L;Bauce M.;Gauzzi P.;Gentile S.;Falciano S.;Giagu S.;Ippolito V.;Padovano G.
2023

Abstract

Differential and double-differential distributions of kinematic variables of leptons from decays of top-quark pairs (tt¯) 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 p T distributions is obtained by reweighting the tt¯ sample so as to reproduce the top-quark p T 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 σtt¯=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. [Figure not available: see fulltext.]
2023
hadron-hadron scattering; top physics; ATLAS
01 Pubblicazione su rivista::01a Articolo in rivista
Inclusive and differential cross-sections for dilepton ����¯ production measured in √�� = 13 TeV �� �� collisions with the ATLAS detector / Betti, A.; De Salvo, A.; Di Domenico, A.; Dionisi, C.; Bini, C.; Luci, C.; Pompa Pacchi, E.; Morodei, F.; Lacava, F.; Safai Tehrani, F.; Artoni, G.; Santi, L.; Martinelli, L.; Maiani, L; Bauce, M.; Gauzzi, P.; Gentile, S.; Falciano, S.; Giagu, S.; Ippolito, V.; Padovano, G.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 7(2023), pp. 1-71. [10.1007/JHEP07(2023)141]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1694093
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