Measurement of colour flow using jet-pull observables in tt¯ events with the ATLAS experiment at √s=13TeV

Previous studies have shown that weighted angular moments derived from jet constituents encode the colour connections between partons that seed the jets. This paper presents measurements of two such distributions, the jet-pull angle and jet-pull magnitude, both of which are derived from the jet-pull...

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Publicado: 2018
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v78_n10_p_Aaboud
http://hdl.handle.net/20.500.12110/paper_14346044_v78_n10_p_Aaboud
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14346044_v78_n10_p_Aaboud
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spelling paper:paper_14346044_v78_n10_p_Aaboud2023-06-08T16:15:22Z Measurement of colour flow using jet-pull observables in tt¯ events with the ATLAS experiment at √s=13TeV Previous studies have shown that weighted angular moments derived from jet constituents encode the colour connections between partons that seed the jets. This paper presents measurements of two such distributions, the jet-pull angle and jet-pull magnitude, both of which are derived from the jet-pull angular moment. The measurement is performed in tt¯ events with one leptonically decaying W boson and one hadronically decaying W boson, using 36.1fb-1 of pp collision data recorded by the ATLAS detector at s=13TeV delivered by the Large Hadron Collider. The observables are measured for two dijet systems, corresponding to the colour-connected daughters of the W boson and the two b-jets from the top-quark decays, which are not expected to be colour connected. To allow the comparison of the measured distributions to colour model predictions, the measured distributions are unfolded to particle level, after correcting for experimental effects introduced by the detector. While good agreement can be found for some combinations of predictions and observables, none of the predictions describes the data well across all observables. © 2018, CERN for the benefit of the ATLAS collaboration. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v78_n10_p_Aaboud http://hdl.handle.net/20.500.12110/paper_14346044_v78_n10_p_Aaboud
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Previous studies have shown that weighted angular moments derived from jet constituents encode the colour connections between partons that seed the jets. This paper presents measurements of two such distributions, the jet-pull angle and jet-pull magnitude, both of which are derived from the jet-pull angular moment. The measurement is performed in tt¯ events with one leptonically decaying W boson and one hadronically decaying W boson, using 36.1fb-1 of pp collision data recorded by the ATLAS detector at s=13TeV delivered by the Large Hadron Collider. The observables are measured for two dijet systems, corresponding to the colour-connected daughters of the W boson and the two b-jets from the top-quark decays, which are not expected to be colour connected. To allow the comparison of the measured distributions to colour model predictions, the measured distributions are unfolded to particle level, after correcting for experimental effects introduced by the detector. While good agreement can be found for some combinations of predictions and observables, none of the predictions describes the data well across all observables. © 2018, CERN for the benefit of the ATLAS collaboration.
title Measurement of colour flow using jet-pull observables in tt¯ events with the ATLAS experiment at √s=13TeV
spellingShingle Measurement of colour flow using jet-pull observables in tt¯ events with the ATLAS experiment at √s=13TeV
title_short Measurement of colour flow using jet-pull observables in tt¯ events with the ATLAS experiment at √s=13TeV
title_full Measurement of colour flow using jet-pull observables in tt¯ events with the ATLAS experiment at √s=13TeV
title_fullStr Measurement of colour flow using jet-pull observables in tt¯ events with the ATLAS experiment at √s=13TeV
title_full_unstemmed Measurement of colour flow using jet-pull observables in tt¯ events with the ATLAS experiment at √s=13TeV
title_sort measurement of colour flow using jet-pull observables in tt¯ events with the atlas experiment at √s=13tev
publishDate 2018
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v78_n10_p_Aaboud
http://hdl.handle.net/20.500.12110/paper_14346044_v78_n10_p_Aaboud
_version_ 1768541576115519488

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