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<sup>−1</sup> of s = 13 TeV proton-proton collisions, collected by the ATLAS detector during...

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Detalles Bibliográficos
Autores principales: Alonso, Francisco, Dova, María Teresa, Hoya, Joaquín, Monticelli, Fernando Gabriel, Orellana, Gonzalo Enrique, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Física
Hadron-Hadron scattering (experiments)
Lepton production
proton-proton scattering
Beyond Standard Model
Branching fraction
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/134061
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-134061
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Hadron-Hadron scattering (experiments)
Lepton production
proton-proton scattering
Beyond Standard Model
Branching fraction
spellingShingle Física
Hadron-Hadron scattering (experiments)
Lepton production
proton-proton scattering
Beyond Standard Model
Branching fraction
Alonso, Francisco
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Measurements of differential cross-sections in four-lepton events in 13 TeV proton-proton collisions with the ATLAS detector
topic_facet Física
Hadron-Hadron scattering (experiments)
Lepton production
proton-proton scattering
Beyond Standard Model
Branching fraction
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<sup>−1</sup> 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 Z → 4ℓ branching fraction is extracted, giving a value of (4.41 ± 0.30) × 10<sup>−6</sup>. Constraints on effective field theory parameters and a model based on a spontaneously broken B − L gauge symmetry are also evaluated. Further reinterpretations can be performed with the provided information.
format Articulo
Articulo
author Alonso, Francisco
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_facet Alonso, Francisco
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_sort Alonso, Francisco
title 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_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_sort measurements of differential cross-sections in four-lepton events in 13 tev proton-proton collisions with the atlas detector
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/134061
work_keys_str_mv AT alonsofrancisco measurementsofdifferentialcrosssectionsinfourleptoneventsin13tevprotonprotoncollisionswiththeatlasdetector
AT dovamariateresa measurementsofdifferentialcrosssectionsinfourleptoneventsin13tevprotonprotoncollisionswiththeatlasdetector
AT hoyajoaquin measurementsofdifferentialcrosssectionsinfourleptoneventsin13tevprotonprotoncollisionswiththeatlasdetector
AT monticellifernandogabriel measurementsofdifferentialcrosssectionsinfourleptoneventsin13tevprotonprotoncollisionswiththeatlasdetector
AT orellanagonzaloenrique measurementsofdifferentialcrosssectionsinfourleptoneventsin13tevprotonprotoncollisionswiththeatlasdetector
AT wahlberghernanpablo measurementsofdifferentialcrosssectionsinfourleptoneventsin13tevprotonprotoncollisionswiththeatlasdetector
AT theatlascollaboration measurementsofdifferentialcrosssectionsinfourleptoneventsin13tevprotonprotoncollisionswiththeatlasdetector
bdutipo_str Repositorios
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