A Bayesian view of the Higgs sector with higher dimensional operators

Detalhes bibliográficos
Autor(a) principal: Dumont, Beranger
Data de Publicação: 2013
Outros Autores: Fichet, Sylvain, Von Gersdorff, Gero [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1007/JHEP07(2013)065
http://hdl.handle.net/11449/76268
Resumo: We investigate the possibilities of New Physics affecting the Standard Model (SM) Higgs sector. An effective Lagrangian with dimension-six operators is used to capture the effect of New Physics. We carry out a global Bayesian inference analysis, considering the recent LHC data set including all available correlations, as well as results from Tevatron. Trilinear gauge boson couplings and electroweak precision observables are also taken into account. The case of weak bosons tensorial couplings is closely examined and NLO QCD corrections are taken into account in the deviations we predict. We consider two scenarios, one where the coefficients of all the dimension-six operators are essentially unconstrained, and one where a certain subset is loop suppressed. In both scenarios, we find that large deviations from some of the SM Higgs couplings can still be present, assuming New Physics arising at 3 TeV. In particular, we find that a significantly reduced coupling of the Higgs to the top quark is possible and slightly favored by searches on Higgs production in association with top quark pairs. The total width of the Higgs boson is only weakly constrained and can vary between 0.7 and 2.7 times the Standard Model value within 95% Bayesian credible interval (BCI). We also observe sizeable effects induced by New Physics contributions to tensorial couplings. In particular, the Higgs boson decay width into Zγ can be enhanced by up to a factor 12 within 95% BCI. © 2013 SISSA.
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spelling A Bayesian view of the Higgs sector with higher dimensional operatorsBeyond Standard ModelHiggs PhysicsWe investigate the possibilities of New Physics affecting the Standard Model (SM) Higgs sector. An effective Lagrangian with dimension-six operators is used to capture the effect of New Physics. We carry out a global Bayesian inference analysis, considering the recent LHC data set including all available correlations, as well as results from Tevatron. Trilinear gauge boson couplings and electroweak precision observables are also taken into account. The case of weak bosons tensorial couplings is closely examined and NLO QCD corrections are taken into account in the deviations we predict. We consider two scenarios, one where the coefficients of all the dimension-six operators are essentially unconstrained, and one where a certain subset is loop suppressed. In both scenarios, we find that large deviations from some of the SM Higgs couplings can still be present, assuming New Physics arising at 3 TeV. In particular, we find that a significantly reduced coupling of the Higgs to the top quark is possible and slightly favored by searches on Higgs production in association with top quark pairs. The total width of the Higgs boson is only weakly constrained and can vary between 0.7 and 2.7 times the Standard Model value within 95% Bayesian credible interval (BCI). We also observe sizeable effects induced by New Physics contributions to tensorial couplings. In particular, the Higgs boson decay width into Zγ can be enhanced by up to a factor 12 within 95% BCI. © 2013 SISSA.Laboratoire de Physique Subatomique et de Cosmologie UJF Grenoble 1 INPG 53, Avenue des Martyrs, F-38026 GrenobleInternational Institute of Physics UFRN, Av. Odilon Gomes de Lima, 1722, Capim Macio, 59078-400 Natal RNCentre de Physique Théorique École Polytechnique and CNRS, F-91128 PalaiseauICTP South American Institute for Fundamental Research Instituto de Fisica Teorica Sao Paulo State University, Sao Paulo SP 01140-070ICTP South American Institute for Fundamental Research Instituto de Fisica Teorica Sao Paulo State University, Sao Paulo SP 01140-070INPG 53Universidade Federal do Rio Grande do Norte (UFRN)École Polytechnique and CNRSUniversidade Estadual Paulista (Unesp)Dumont, BerangerFichet, SylvainVon Gersdorff, Gero [UNESP]2014-05-27T11:30:09Z2014-05-27T11:30:09Z2013-08-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1007/JHEP07(2013)065Journal of High Energy Physics, v. 2013, n. 7, 2013.1126-67081029-8479http://hdl.handle.net/11449/7626810.1007/JHEP07(2013)065WOS:0003232026000652-s2.0-848813217172-s2.0-84881321717.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of High Energy Physics5.5411,2271,227info:eu-repo/semantics/openAccess2023-10-03T06:02:14Zoai:repositorio.unesp.br:11449/76268Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T13:50:48.195350Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv A Bayesian view of the Higgs sector with higher dimensional operators
title A Bayesian view of the Higgs sector with higher dimensional operators
spellingShingle A Bayesian view of the Higgs sector with higher dimensional operators
Dumont, Beranger
Beyond Standard Model
Higgs Physics
title_short A Bayesian view of the Higgs sector with higher dimensional operators
title_full A Bayesian view of the Higgs sector with higher dimensional operators
title_fullStr A Bayesian view of the Higgs sector with higher dimensional operators
title_full_unstemmed A Bayesian view of the Higgs sector with higher dimensional operators
title_sort A Bayesian view of the Higgs sector with higher dimensional operators
author Dumont, Beranger
author_facet Dumont, Beranger
Fichet, Sylvain
Von Gersdorff, Gero [UNESP]
author_role author
author2 Fichet, Sylvain
Von Gersdorff, Gero [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv INPG 53
Universidade Federal do Rio Grande do Norte (UFRN)
École Polytechnique and CNRS
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Dumont, Beranger
Fichet, Sylvain
Von Gersdorff, Gero [UNESP]
dc.subject.por.fl_str_mv Beyond Standard Model
Higgs Physics
topic Beyond Standard Model
Higgs Physics
description We investigate the possibilities of New Physics affecting the Standard Model (SM) Higgs sector. An effective Lagrangian with dimension-six operators is used to capture the effect of New Physics. We carry out a global Bayesian inference analysis, considering the recent LHC data set including all available correlations, as well as results from Tevatron. Trilinear gauge boson couplings and electroweak precision observables are also taken into account. The case of weak bosons tensorial couplings is closely examined and NLO QCD corrections are taken into account in the deviations we predict. We consider two scenarios, one where the coefficients of all the dimension-six operators are essentially unconstrained, and one where a certain subset is loop suppressed. In both scenarios, we find that large deviations from some of the SM Higgs couplings can still be present, assuming New Physics arising at 3 TeV. In particular, we find that a significantly reduced coupling of the Higgs to the top quark is possible and slightly favored by searches on Higgs production in association with top quark pairs. The total width of the Higgs boson is only weakly constrained and can vary between 0.7 and 2.7 times the Standard Model value within 95% Bayesian credible interval (BCI). We also observe sizeable effects induced by New Physics contributions to tensorial couplings. In particular, the Higgs boson decay width into Zγ can be enhanced by up to a factor 12 within 95% BCI. © 2013 SISSA.
publishDate 2013
dc.date.none.fl_str_mv 2013-08-15
2014-05-27T11:30:09Z
2014-05-27T11:30:09Z
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/10.1007/JHEP07(2013)065
Journal of High Energy Physics, v. 2013, n. 7, 2013.
1126-6708
1029-8479
http://hdl.handle.net/11449/76268
10.1007/JHEP07(2013)065
WOS:000323202600065
2-s2.0-84881321717
2-s2.0-84881321717.pdf
url http://dx.doi.org/10.1007/JHEP07(2013)065
http://hdl.handle.net/11449/76268
identifier_str_mv Journal of High Energy Physics, v. 2013, n. 7, 2013.
1126-6708
1029-8479
10.1007/JHEP07(2013)065
WOS:000323202600065
2-s2.0-84881321717
2-s2.0-84881321717.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal of High Energy Physics
5.541
1,227
1,227
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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
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