Radion-Higgs mixing effects on bounds from LHC Higgs boson searches
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevD.85.053003 http://hdl.handle.net/11449/226739 |
Resumo: | The radion, a scalar particle associated with the radius of a compact warped extra dimension, may be the lightest new particle in this class of models. Its couplings to SM particles are proportional to the their masses, similar to the usual Higgs boson, but suppressed by a scale Λ r, the radion vacuum expectation value. The main differences are the coupling to massless gauge bosons that receives contribution from the trace anomaly of the energy-momentum tensor due to the nonvanishing β functions and the mixing with the Higgs boson arising from a nonminimal coupling to gravity parametrized by a dimensionless coefficient ξ. In particular, these differences can result in significant modifications of the radion phenomenology. We use current LHC data on Higgs searches to find exclusion regions on the parameters of a radion model, Λ r, ξ and the radion mass m r. We find that, even for low values of Λ r, the radion can still have a mass in the region where the Standard Model Higgs has been excluded, for a narrow range of values for the mixing parameter. Some signals at the LHC for this scenario are discussed. We also find that it is possible to hide the Higgs boson in the current searches in this model, due to a suppression of its couplings. © 2012 American Physical Society. |
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Radion-Higgs mixing effects on bounds from LHC Higgs boson searchesThe radion, a scalar particle associated with the radius of a compact warped extra dimension, may be the lightest new particle in this class of models. Its couplings to SM particles are proportional to the their masses, similar to the usual Higgs boson, but suppressed by a scale Λ r, the radion vacuum expectation value. The main differences are the coupling to massless gauge bosons that receives contribution from the trace anomaly of the energy-momentum tensor due to the nonvanishing β functions and the mixing with the Higgs boson arising from a nonminimal coupling to gravity parametrized by a dimensionless coefficient ξ. In particular, these differences can result in significant modifications of the radion phenomenology. We use current LHC data on Higgs searches to find exclusion regions on the parameters of a radion model, Λ r, ξ and the radion mass m r. We find that, even for low values of Λ r, the radion can still have a mass in the region where the Standard Model Higgs has been excluded, for a narrow range of values for the mixing parameter. Some signals at the LHC for this scenario are discussed. We also find that it is possible to hide the Higgs boson in the current searches in this model, due to a suppression of its couplings. © 2012 American Physical Society.Institut de Physique Théorique CEA-Saclay, 91191 Gif-sur-YvetteCERN Theory Division, CH-1211, Geneva 23Instituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento T. Ferraz, 271, São Paulo, SP 01140-070Instituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento T. Ferraz, 271, São Paulo, SP 01140-070CEA-SaclayTheory DivisionUniversidade Estadual Paulista (UNESP)De Sandes, HiroshiRosenfeld, Rogerio [UNESP]2022-04-29T02:55:19Z2022-04-29T02:55:19Z2012-03-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevD.85.053003Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 85, n. 5, 2012.1550-79981550-2368http://hdl.handle.net/11449/22673910.1103/PhysRevD.85.0530032-s2.0-84858050395Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review D - Particles, Fields, Gravitation and Cosmologyinfo:eu-repo/semantics/openAccess2022-04-29T02:55:19Zoai:repositorio.unesp.br:11449/226739Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-29T02:55:19Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Radion-Higgs mixing effects on bounds from LHC Higgs boson searches |
title |
Radion-Higgs mixing effects on bounds from LHC Higgs boson searches |
spellingShingle |
Radion-Higgs mixing effects on bounds from LHC Higgs boson searches De Sandes, Hiroshi |
title_short |
Radion-Higgs mixing effects on bounds from LHC Higgs boson searches |
title_full |
Radion-Higgs mixing effects on bounds from LHC Higgs boson searches |
title_fullStr |
Radion-Higgs mixing effects on bounds from LHC Higgs boson searches |
title_full_unstemmed |
Radion-Higgs mixing effects on bounds from LHC Higgs boson searches |
title_sort |
Radion-Higgs mixing effects on bounds from LHC Higgs boson searches |
author |
De Sandes, Hiroshi |
author_facet |
De Sandes, Hiroshi Rosenfeld, Rogerio [UNESP] |
author_role |
author |
author2 |
Rosenfeld, Rogerio [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
CEA-Saclay Theory Division Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
De Sandes, Hiroshi Rosenfeld, Rogerio [UNESP] |
description |
The radion, a scalar particle associated with the radius of a compact warped extra dimension, may be the lightest new particle in this class of models. Its couplings to SM particles are proportional to the their masses, similar to the usual Higgs boson, but suppressed by a scale Λ r, the radion vacuum expectation value. The main differences are the coupling to massless gauge bosons that receives contribution from the trace anomaly of the energy-momentum tensor due to the nonvanishing β functions and the mixing with the Higgs boson arising from a nonminimal coupling to gravity parametrized by a dimensionless coefficient ξ. In particular, these differences can result in significant modifications of the radion phenomenology. We use current LHC data on Higgs searches to find exclusion regions on the parameters of a radion model, Λ r, ξ and the radion mass m r. We find that, even for low values of Λ r, the radion can still have a mass in the region where the Standard Model Higgs has been excluded, for a narrow range of values for the mixing parameter. Some signals at the LHC for this scenario are discussed. We also find that it is possible to hide the Higgs boson in the current searches in this model, due to a suppression of its couplings. © 2012 American Physical Society. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-03-08 2022-04-29T02:55:19Z 2022-04-29T02:55:19Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevD.85.053003 Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 85, n. 5, 2012. 1550-7998 1550-2368 http://hdl.handle.net/11449/226739 10.1103/PhysRevD.85.053003 2-s2.0-84858050395 |
url |
http://dx.doi.org/10.1103/PhysRevD.85.053003 http://hdl.handle.net/11449/226739 |
identifier_str_mv |
Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 85, n. 5, 2012. 1550-7998 1550-2368 10.1103/PhysRevD.85.053003 2-s2.0-84858050395 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review D - Particles, Fields, Gravitation and Cosmology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803047453483597824 |