Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector

Measurements of top quark spin observables in tt¯ events are presented based on 20.2 fb −1 of s=8 TeV proton-proton collisions recorded with the ATLAS detector at the LHC. The analysis is performed in the dilepton final state, characterised by the presence of two isolated leptons (electrons or muons...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2017
Materias:
Hadron-Hadron scattering (experiments)
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2017_n3_p_TheATLAScollaboration
http://hdl.handle.net/20.500.12110/paper_11266708_v2017_n3_p_TheATLAScollaboration
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_11266708_v2017_n3_p_TheATLAScollaboration
record_format dspace
spelling paper:paper_11266708_v2017_n3_p_TheATLAScollaboration2023-06-08T16:08:52Z Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector Hadron-Hadron scattering (experiments) Measurements of top quark spin observables in tt¯ events are presented based on 20.2 fb −1 of s=8 TeV proton-proton collisions recorded with the ATLAS detector at the LHC. The analysis is performed in the dilepton final state, characterised by the presence of two isolated leptons (electrons or muons). There are 15 observables, each sensitive to a different coefficient of the spin density matrix of tt¯ production, which are measured independently. Ten of these observables are measured for the first time. All of them are corrected for detector resolution and acceptance effects back to the parton and stable-particle levels. The measured values of the observables at parton level are compared to Standard Model predictions at next-to-leading order in QCD. The corrected distributions at stable-particle level are presented and the means of the distributions are compared to Monte Carlo predictions. No significant deviation from the Standard Model is observed for any observable.[Figure not available: see fulltext.] © 2017, The Author(s). 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2017_n3_p_TheATLAScollaboration http://hdl.handle.net/20.500.12110/paper_11266708_v2017_n3_p_TheATLAScollaboration
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Hadron-Hadron scattering (experiments)
spellingShingle Hadron-Hadron scattering (experiments)
Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector
topic_facet Hadron-Hadron scattering (experiments)
description Measurements of top quark spin observables in tt¯ events are presented based on 20.2 fb −1 of s=8 TeV proton-proton collisions recorded with the ATLAS detector at the LHC. The analysis is performed in the dilepton final state, characterised by the presence of two isolated leptons (electrons or muons). There are 15 observables, each sensitive to a different coefficient of the spin density matrix of tt¯ production, which are measured independently. Ten of these observables are measured for the first time. All of them are corrected for detector resolution and acceptance effects back to the parton and stable-particle levels. The measured values of the observables at parton level are compared to Standard Model predictions at next-to-leading order in QCD. The corrected distributions at stable-particle level are presented and the means of the distributions are compared to Monte Carlo predictions. No significant deviation from the Standard Model is observed for any observable.[Figure not available: see fulltext.] © 2017, The Author(s).
title Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector
title_short Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector
title_full Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector
title_fullStr Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector
title_full_unstemmed Measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 TeV pp collisions with the ATLAS detector
title_sort measurements of top quark spin observables in tt¯ events using dilepton final states in √s=8 tev pp collisions with the atlas detector
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2017_n3_p_TheATLAScollaboration
http://hdl.handle.net/20.500.12110/paper_11266708_v2017_n3_p_TheATLAScollaboration
_version_ 1768542189981270016

Ejemplares similares