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Article
Report number arXiv:2103.01918 ; CERN-EP-2021-019
Title Measurements of differential cross-sections in four-lepton events in 13 TeV proton-proton collisions with the ATLAS detector
Author(s) ATLAS Collaboration  Show all 3078 authors
Corporate Author(s) ATLAS Collaboration
Publication 2021-07-02
Imprint 03 Mar 2021
Number of pages 67
Note 64 pages in total, author list starting page 48, 20 figures, 4 tables, published in JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2018-30
In: JHEP 2107 (2021) 005
DOI 10.1007/JHEP07(2021)005
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords electroweak interaction ; lepton production ; experimental results
Abstract Measurements of four-lepton differential and integrated fiducial cross-sections in events with two same-flavour, opposite-charge electron or muon pairs are presented. The data correspond to 139 fb1 of s=13 TeV proton-proton collisions, collected by the ATLAS detector during Run 2 of the Large Hadron Collider (2015-2018). The final state has contributions from a number of interesting Standard Model processes that dominate in different four-lepton invariant mass regions, including single Z boson production, Higgs boson production and on-shell ZZ production, with a complex mix of interference terms, and possible contributions from physics beyond the Standard Model. The differential cross-sections include the four-lepton invariant mass inclusively, in slices of other kinematic variables, and in different lepton flavour categories. Also measured are dilepton invariant masses, transverse momenta, and angular correlation variables, in four regions of four-lepton invariant mass, each dominated by different processes. The measurements are corrected for detector effects and are compared with state-of-the-art Standard Model calculations, which are found to be consistent with the data. The Z4 branching fraction is extracted, giving a value of (4.41±0.30)×106. Constraints on effective field theory parameters and a model based on a spontaneously broken BL gauge symmetry are also evaluated. Further reinterpretations can be performed with the provided information.
Related document supersedes: ATLAS-CONF-2020-042
Copyright/License publication: © 2021-2025 CERN (License: CC-BY-4.0), sponsored by SCOAP³
preprint: © 2021-2025 CERN (License: CC-BY-4.0)



Corresponding record in: Inspire
Email contact: tatjana.lenz@cern.ch


 Záznam vytvorený 2021-03-03, zmenený 2024-10-03


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