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Measurements of differential cross-sections in four-lepton events in 13 TeV proton-proton collisions with the ATLAS detector

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~fb$^{-1}$ of $\sqrt{s}=13$ TeV proton-proton collisions, collected by the ATLAS detector during Run 2 of t...

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Autor principal: The ATLAS collaboration
Lenguaje:eng
Publicado: 2020
Materias:
Acceso en línea:http://cds.cern.ch/record/2728051
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author The ATLAS collaboration
author_facet The ATLAS collaboration
author_sort The ATLAS collaboration
collection CERN
description 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~fb$^{-1}$ of $\sqrt{s}=13$ 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 beyond-the-Standard Model physics. 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 di-lepton 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 to state-of-the-art Standard Model calculations, which are found to be consistent with the data. The $Z\to 4\ell$ branching fraction is extracted, giving a value of $\left(4.41 \pm 0.30\right) \times 10^{-6}$. Constraints on a model based on a spontaneously broken B-L gauge symmetry are also evaluated.
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spelling cern-27280512021-04-18T19:39:44Zhttp://cds.cern.ch/record/2728051engThe ATLAS collaborationMeasurements of differential cross-sections in four-lepton events in 13 TeV proton-proton collisions with the ATLAS detectorParticle Physics - ExperimentMeasurements 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~fb$^{-1}$ of $\sqrt{s}=13$ 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 beyond-the-Standard Model physics. 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 di-lepton 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 to state-of-the-art Standard Model calculations, which are found to be consistent with the data. The $Z\to 4\ell$ branching fraction is extracted, giving a value of $\left(4.41 \pm 0.30\right) \times 10^{-6}$. Constraints on a model based on a spontaneously broken B-L gauge symmetry are also evaluated.ATLAS-CONF-2020-042oai:cds.cern.ch:27280512020-08-14
spellingShingle Particle Physics - Experiment
The ATLAS collaboration
Measurements of differential cross-sections in four-lepton events in 13 TeV proton-proton collisions with the ATLAS detector
title Measurements of differential cross-sections in four-lepton events in 13 TeV proton-proton collisions with the ATLAS detector
title_full Measurements of differential cross-sections in four-lepton events in 13 TeV proton-proton collisions with the ATLAS detector
title_fullStr Measurements of differential cross-sections in four-lepton events in 13 TeV proton-proton collisions with the ATLAS detector
title_full_unstemmed Measurements of differential cross-sections in four-lepton events in 13 TeV proton-proton collisions with the ATLAS detector
title_short Measurements of differential cross-sections in four-lepton events in 13 TeV proton-proton collisions with the ATLAS detector
title_sort measurements of differential cross-sections in four-lepton events in 13 tev proton-proton collisions with the atlas detector
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2728051
work_keys_str_mv AT theatlascollaboration measurementsofdifferentialcrosssectionsinfourleptoneventsin13tevprotonprotoncollisionswiththeatlasdetector