Anomalous couplings of the Higgs boson in the WW decay channel with the CMS experiment at the LHC

The thesis herein constitutes a comprehensive investigation of anomalous couplings between the Higgs boson (H) and the bosons W, Z, and g, including the effects of Charge-Parity (CP) violation in the context of the direct searches of anomalous couplings. The study employs various Higgs production me...

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Author: Urda Gómez, Lourdes María
Format: doctoral thesis
Publication Date:2024
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/103162
Online Access:https://hdl.handle.net/20.500.14352/103162
Access Level:Open access
Keyword:539.12(043.2)
Bosón de Higgs
Física (Física)
22 Física
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spelling Anomalous couplings of the Higgs boson in the WW decay channel with the CMS experiment at the LHCAcoplamientos anómalos del Bosón de Higgs en el canal de desintegración WW con el experimento CMS del LHCUrda Gómez, Lourdes María539.12(043.2)Bosón de HiggsFísica (Física)22 FísicaThe thesis herein constitutes a comprehensive investigation of anomalous couplings between the Higgs boson (H) and the bosons W, Z, and g, including the effects of Charge-Parity (CP) violation in the context of the direct searches of anomalous couplings. The study employs various Higgs production mechanisms, such as gluon-gluon fusion, vector boson fusion, and the associated production with aW or Z boson, focusing on the Higgs boson decay to a pair of W bosons in the different flavor dilepton (eμ) final state. The data analyzed was collected by the CMS detector at the LHC from 2016 to 2018, with a center-of-mass energy of 13TeV and an integrated luminosity of 138 fb−1. To increase sensitivity to anomalous effects at the production vertex, the kinematic information from associated jets inthe Higgs production was combined using matrix element techniques. The study also utilized Monte Carlo simulation and matrix-element reweighting to model all kinematic features in the production and decay of the Higgs boson, along with a full simulation of detector effects. The analysis resulted in a simultaneous measurement of four Higgs boson couplings to electroweak vector bosons within the framework of a standard model effective field theory. The measured values were found to be consistent with the standard model expectations for the Higgsboson, and constraints were set on the fractional contribution of the anomalous couplings to the Higgs boson cross-section. These results significantly surpass the precision and coverage of the last H to WW anomalous coupling analysis. Additionally, a hardware analysis is included, focusing on the Drift Tubes Phase-2 upgrades of the CMS detector to accommodate higher luminosities expected for future operations. Through precision measurements and advanced analysis techniques, this research contributes to our understanding of the fundamental nature of the universe, seeking to uncover new physics phenomena beyond the standard model.Universidad Complutense de MadridCepeda Hermida, María LuisaMoran, Dermot AnthonyUniversidad Complutense de Madrid20242024-04-1620242024-04-16doctoral thesishttp://purl.org/coar/resource_type/c_db06info:eu-repo/semantics/doctoralThesisapplication/pdfhttps://hdl.handle.net/20.500.14352/103162reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1031622026-06-02T12:44:21Z
dc.title.none.fl_str_mv Anomalous couplings of the Higgs boson in the WW decay channel with the CMS experiment at the LHC
Acoplamientos anómalos del Bosón de Higgs en el canal de desintegración WW con el experimento CMS del LHC
title Anomalous couplings of the Higgs boson in the WW decay channel with the CMS experiment at the LHC
spellingShingle Anomalous couplings of the Higgs boson in the WW decay channel with the CMS experiment at the LHC
Urda Gómez, Lourdes María
539.12(043.2)
Bosón de Higgs
Física (Física)
22 Física
title_short Anomalous couplings of the Higgs boson in the WW decay channel with the CMS experiment at the LHC
title_full Anomalous couplings of the Higgs boson in the WW decay channel with the CMS experiment at the LHC
title_fullStr Anomalous couplings of the Higgs boson in the WW decay channel with the CMS experiment at the LHC
title_full_unstemmed Anomalous couplings of the Higgs boson in the WW decay channel with the CMS experiment at the LHC
title_sort Anomalous couplings of the Higgs boson in the WW decay channel with the CMS experiment at the LHC
dc.creator.none.fl_str_mv Urda Gómez, Lourdes María
author Urda Gómez, Lourdes María
author_facet Urda Gómez, Lourdes María
author_role author
dc.contributor.none.fl_str_mv Cepeda Hermida, María Luisa
Moran, Dermot Anthony
Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 539.12(043.2)
Bosón de Higgs
Física (Física)
22 Física
topic 539.12(043.2)
Bosón de Higgs
Física (Física)
22 Física
description The thesis herein constitutes a comprehensive investigation of anomalous couplings between the Higgs boson (H) and the bosons W, Z, and g, including the effects of Charge-Parity (CP) violation in the context of the direct searches of anomalous couplings. The study employs various Higgs production mechanisms, such as gluon-gluon fusion, vector boson fusion, and the associated production with aW or Z boson, focusing on the Higgs boson decay to a pair of W bosons in the different flavor dilepton (eμ) final state. The data analyzed was collected by the CMS detector at the LHC from 2016 to 2018, with a center-of-mass energy of 13TeV and an integrated luminosity of 138 fb−1. To increase sensitivity to anomalous effects at the production vertex, the kinematic information from associated jets inthe Higgs production was combined using matrix element techniques. The study also utilized Monte Carlo simulation and matrix-element reweighting to model all kinematic features in the production and decay of the Higgs boson, along with a full simulation of detector effects. The analysis resulted in a simultaneous measurement of four Higgs boson couplings to electroweak vector bosons within the framework of a standard model effective field theory. The measured values were found to be consistent with the standard model expectations for the Higgsboson, and constraints were set on the fractional contribution of the anomalous couplings to the Higgs boson cross-section. These results significantly surpass the precision and coverage of the last H to WW anomalous coupling analysis. Additionally, a hardware analysis is included, focusing on the Drift Tubes Phase-2 upgrades of the CMS detector to accommodate higher luminosities expected for future operations. Through precision measurements and advanced analysis techniques, this research contributes to our understanding of the fundamental nature of the universe, seeking to uncover new physics phenomena beyond the standard model.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024-04-16
2024
2024-04-16
dc.type.none.fl_str_mv doctoral thesis
http://purl.org/coar/resource_type/c_db06
dc.type.openaire.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/103162
url https://hdl.handle.net/20.500.14352/103162
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad Complutense de Madrid
publisher.none.fl_str_mv Universidad Complutense de Madrid
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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