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Abstract / Description of output
Single top-quark production in association with a Z boson, where the Z boson
decays to a pair of charged leptons, is measured in the trilepton channel. The proton-proton collision data collected by the ATLAS experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 139 fb−1. Events containing three isolated charged leptons (electrons or muons) and two or three jets, one of which is identified as containing a b-hadron, are selected. The main backgrounds are from
t¯tZ and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for t`+`−q production, including nonresonant dilepton pairs with m`+`− > 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction.
decays to a pair of charged leptons, is measured in the trilepton channel. The proton-proton collision data collected by the ATLAS experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 139 fb−1. Events containing three isolated charged leptons (electrons or muons) and two or three jets, one of which is identified as containing a b-hadron, are selected. The main backgrounds are from
t¯tZ and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for t`+`−q production, including nonresonant dilepton pairs with m`+`− > 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction.
Original language | English |
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Article number | 124 |
Pages (from-to) | 1-45 |
Number of pages | 45 |
Journal | Journal of High Energy Physics |
Volume | 2020 |
Issue number | 7 |
DOIs | |
Publication status | Published - 20 Jul 2020 |