Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector

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...

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Detalles Bibliográficos
Autores principales:	Alonso, Francisco, Arduh, Francisco Anuar, Dova, María Teresa, Hoya, Joaquín, Monticelli, Fernando Gabriel, Orellana, Gonzalo Enrique, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2020
Materias:	Ciencias Exactas Física Hadron-Hadron scattering (experiments)
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/124854
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-124854
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Exactas Física Hadron-Hadron scattering (experiments)
spellingShingle	Ciencias Exactas Física Hadron-Hadron scattering (experiments) Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Wahlberg, Hernán Pablo The ATLAS Collaboration Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector
topic_facet	Ciencias Exactas Física Hadron-Hadron scattering (experiments)
description	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 m<sub>ℓ⁺ℓ⁻</sub> > 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction.
format	Articulo Articulo
author	Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Wahlberg, Hernán Pablo The ATLAS Collaboration
author_facet	Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Wahlberg, Hernán Pablo The ATLAS Collaboration
author_sort	Alonso, Francisco
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
title_short	Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector
title_full	Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector
title_fullStr	Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector
title_full_unstemmed	Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector
title_sort	observation of the associated production of a top quark and a z boson in pp collisions at √s = 13 tev with the atlas detector
publishDate	2020
url	http://sedici.unlp.edu.ar/handle/10915/124854
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bdutipo_str	Repositorios
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Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector

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