Bottom-up approach within the electroweak effective theory: Constraining heavy resonances

The LHC has confirmed the existence of a mass gap between the known particles and possible new states. Effective field theory is then the appropriate tool to search for low-energy signals of physics beyond the Standard Model. We adopt the general formalism of the electroweak effective theory, with a...

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Detalles Bibliográficos
Autores: Pich, Antonio, Rosell, Ignasi, Sanz Cillero, Juan José
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/7261
Acceso en línea:https://hdl.handle.net/20.500.14352/7261
Access Level:acceso abierto
Palabra clave:Electromagnetismo
2202 Electromagnetismo
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spelling Bottom-up approach within the electroweak effective theory: Constraining heavy resonancesPich, AntonioRosell, IgnasiSanz Cillero, Juan JoséElectromagnetismo2202 ElectromagnetismoThe LHC has confirmed the existence of a mass gap between the known particles and possible new states. Effective field theory is then the appropriate tool to search for low-energy signals of physics beyond the Standard Model. We adopt the general formalism of the electroweak effective theory, with a nonlinear realization of the electroweak symmetry breaking, where the Higgs is a singlet with independent couplings. At higher energies we consider a generic resonance Lagrangian which follows the above-mentioned nonlinear realization and couples the light particles to bosonic heavy resonances with JP=0± and JP=1±. Integrating out the resonances and assuming a proper short-distance behavior, it is possible to determine or to constrain most of the bosonic low-energy constants in terms of resonance masses. Therefore, the current experimental bounds on these bosonic low-energy constants allow us to constrain the resonance masses above the TeV scale, by following a typical bottom-up approach, i.e., the fit of the low-energy constants to precise experimental data enables us to learn about the high-energy scales, the underlying theory behind the Standard Model.APS PhysicsUniversidad Complutense de Madrid20202020-08-1020202020-08-10journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/7261reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/72612026-06-02T12:44:21Z
dc.title.none.fl_str_mv Bottom-up approach within the electroweak effective theory: Constraining heavy resonances
title Bottom-up approach within the electroweak effective theory: Constraining heavy resonances
spellingShingle Bottom-up approach within the electroweak effective theory: Constraining heavy resonances
Pich, Antonio
Electromagnetismo
2202 Electromagnetismo
title_short Bottom-up approach within the electroweak effective theory: Constraining heavy resonances
title_full Bottom-up approach within the electroweak effective theory: Constraining heavy resonances
title_fullStr Bottom-up approach within the electroweak effective theory: Constraining heavy resonances
title_full_unstemmed Bottom-up approach within the electroweak effective theory: Constraining heavy resonances
title_sort Bottom-up approach within the electroweak effective theory: Constraining heavy resonances
dc.creator.none.fl_str_mv Pich, Antonio
Rosell, Ignasi
Sanz Cillero, Juan José
author Pich, Antonio
author_facet Pich, Antonio
Rosell, Ignasi
Sanz Cillero, Juan José
author_role author
author2 Rosell, Ignasi
Sanz Cillero, Juan José
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv Electromagnetismo
2202 Electromagnetismo
topic Electromagnetismo
2202 Electromagnetismo
description The LHC has confirmed the existence of a mass gap between the known particles and possible new states. Effective field theory is then the appropriate tool to search for low-energy signals of physics beyond the Standard Model. We adopt the general formalism of the electroweak effective theory, with a nonlinear realization of the electroweak symmetry breaking, where the Higgs is a singlet with independent couplings. At higher energies we consider a generic resonance Lagrangian which follows the above-mentioned nonlinear realization and couples the light particles to bosonic heavy resonances with JP=0± and JP=1±. Integrating out the resonances and assuming a proper short-distance behavior, it is possible to determine or to constrain most of the bosonic low-energy constants in terms of resonance masses. Therefore, the current experimental bounds on these bosonic low-energy constants allow us to constrain the resonance masses above the TeV scale, by following a typical bottom-up approach, i.e., the fit of the low-energy constants to precise experimental data enables us to learn about the high-energy scales, the underlying theory behind the Standard Model.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-08-10
2020
2020-08-10
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/7261
url https://hdl.handle.net/20.500.14352/7261
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
Atribución 3.0 España
https://creativecommons.org/licenses/by/3.0/es/
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
Atribución 3.0 España
https://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv APS Physics
publisher.none.fl_str_mv APS Physics
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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score 15.300724

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