Aad, G;
Abbott, B;
Abbott, DC;
Abed Abud, A;
Abeling, K;
Abhayasinghe, DK;
Abidi, SH;
... Arce, ATH; + view all
(2020)
Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector.
ournal of High Energy Physics
, 2020
(7)
, Article 124. 10.1007/JHEP07(2020)124.
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Abstract
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 tt¯ Z and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for tℓ+ℓ−q production, including non-resonant dilepton pairs with mℓ+ℓ−> 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction. [Figure not available: see fulltext.]
| Type: | Article |
|---|---|
| Title: | Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1007/JHEP07(2020)124 |
| Publisher version: | https://doi.org/10.1007/JHEP07(2020)124 |
| Language: | English |
| Additional information: | This article is published under an open access license. Please check the 'Copyright Information' section for details of this license and what re-use is permitted. If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and re-use information, please contact the Rights and Permissions team. |
| Keywords: | Hadron-Hadron scattering (experiments) |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10107006 |
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