Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √s = 13 TeV with the ATLAS detector

Measurements of both the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson (tt¯ Z) are presented. The measurements are performed by targeting final states with three or four isolated leptons (electrons or muons) and are based on s=13 TeV...

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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
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/138926
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-138926
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
spellingShingle Física
Alonso, Francisco
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Orellana, Gonzalo Enrique
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √s = 13 TeV with the ATLAS detector
topic_facet Física
description Measurements of both the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson (tt¯ Z) are presented. The measurements are performed by targeting final states with three or four isolated leptons (electrons or muons) and are based on s=13 TeV proton–proton collision data with an integrated luminosity of 139 fb - 1, recorded from 2015 to 2018 with the ATLAS detector at the CERN Large Hadron Collider. The inclusive cross section is measured to be σtt¯Z= 0.99 ± 0.05 (stat.) ±0.08 (syst.) pb, in agreement with the most precise theoretical predictions. The differential measurements are presented as a function of a number of kinematic variables which probe the kinematics of the tt¯ Z system. Both absolute and normalised differential cross-section measurements are performed at particle and parton levels for specific fiducial volumes and are compared with theoretical predictions at different levels of precision, based on a χ2/ ndf and p value computation. Overall, good agreement is observed between the unfolded data and the predictions.
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 the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √s = 13 TeV with the ATLAS detector
title_short Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √s = 13 TeV with the ATLAS detector
title_full Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √s = 13 TeV with the ATLAS detector
title_fullStr Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √s = 13 TeV with the ATLAS detector
title_full_unstemmed Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √s = 13 TeV with the ATLAS detector
title_sort measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a z boson at √s = 13 tev with the atlas detector
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/138926
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AT dovamariateresa measurementsoftheinclusiveanddifferentialproductioncrosssectionsofatopquarkantiquarkpairinassociationwithazbosonats13tevwiththeatlasdetector
AT hoyajoaquin measurementsoftheinclusiveanddifferentialproductioncrosssectionsofatopquarkantiquarkpairinassociationwithazbosonats13tevwiththeatlasdetector
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