Phenomenological comparison of models with extended Higgs sectors
Abstract Beyond the Standard Model (SM) extensions usually include extended Higgs sectors. Models with singlet or doublet fields are the simplest ones that are compatible with the ρ parameter constraint. The discovery of new non-SM Higgs bosons and the identification of the underlying model requires...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-08-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | http://link.springer.com/article/10.1007/JHEP08(2017)132 |
| _version_ | 1819070537364668416 |
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| author | Margarete Mühlleitner Marco O. P. Sampaio Rui Santos Jonas Wittbrodt |
| author_facet | Margarete Mühlleitner Marco O. P. Sampaio Rui Santos Jonas Wittbrodt |
| author_sort | Margarete Mühlleitner |
| collection | DOAJ |
| description | Abstract Beyond the Standard Model (SM) extensions usually include extended Higgs sectors. Models with singlet or doublet fields are the simplest ones that are compatible with the ρ parameter constraint. The discovery of new non-SM Higgs bosons and the identification of the underlying model requires dedicated Higgs properties analyses. In this paper, we compare several Higgs sectors featuring 3 CP-even neutral Higgs bosons that are also motivated by their simplicity and their ability to solve some of the flaws of the SM. They are: the SM extended by a complex singlet field (CxSM), the singlet extension of the 2-Higgs-Doublet Model (N2HDM), and the Next-to-Minimal Supersymmetric SM extension (NMSSM). In addition, we analyse the CP-violating 2-Higgs-Doublet Model (C2HDM), which provides 3 neutral Higgs bosons with a pseudoscalar admixture. This allows us to compare the effects of singlet and pseudoscalar admixtures. Through dedicated scans of the allowed parameter space of the models, we analyse the phenomenologically viable scenarios from the view point of the SM-like Higgs boson and of the signal rates of the non-SM-like Higgs bosons to be found. In particular, we analyse the effect of singlet/pseudoscalar admixture, and the potential to differentiate these models in the near future. This is supported by a study of couplings sums of the Higgs bosons to massive gauge bosons and to fermions, where we identify features that allow us to distinguish the models, in particular when only part of the Higgs spectrum is discovered. Our results can be taken as guidelines for future LHC data analyses, by the ATLAS and CMS experiments, to identify specific benchmark points aimed at revealing the underlying model. |
| first_indexed | 2024-12-21T17:07:31Z |
| format | Article |
| id | doaj.art-4e5031ff26e24790b3e64039a0d64750 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-21T17:07:31Z |
| publishDate | 2017-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-4e5031ff26e24790b3e64039a0d647502022-12-21T18:56:29ZengSpringerOpenJournal of High Energy Physics1029-84792017-08-012017815510.1007/JHEP08(2017)132Phenomenological comparison of models with extended Higgs sectorsMargarete Mühlleitner0Marco O. P. Sampaio1Rui Santos2Jonas Wittbrodt3Institute for Theoretical Physics, Karlsruhe Institute of TechnologyDepartamento de Física, Universidade de Aveiro and CIDMAISEL — Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de LisboaInstitute for Theoretical Physics, Karlsruhe Institute of TechnologyAbstract Beyond the Standard Model (SM) extensions usually include extended Higgs sectors. Models with singlet or doublet fields are the simplest ones that are compatible with the ρ parameter constraint. The discovery of new non-SM Higgs bosons and the identification of the underlying model requires dedicated Higgs properties analyses. In this paper, we compare several Higgs sectors featuring 3 CP-even neutral Higgs bosons that are also motivated by their simplicity and their ability to solve some of the flaws of the SM. They are: the SM extended by a complex singlet field (CxSM), the singlet extension of the 2-Higgs-Doublet Model (N2HDM), and the Next-to-Minimal Supersymmetric SM extension (NMSSM). In addition, we analyse the CP-violating 2-Higgs-Doublet Model (C2HDM), which provides 3 neutral Higgs bosons with a pseudoscalar admixture. This allows us to compare the effects of singlet and pseudoscalar admixtures. Through dedicated scans of the allowed parameter space of the models, we analyse the phenomenologically viable scenarios from the view point of the SM-like Higgs boson and of the signal rates of the non-SM-like Higgs bosons to be found. In particular, we analyse the effect of singlet/pseudoscalar admixture, and the potential to differentiate these models in the near future. This is supported by a study of couplings sums of the Higgs bosons to massive gauge bosons and to fermions, where we identify features that allow us to distinguish the models, in particular when only part of the Higgs spectrum is discovered. Our results can be taken as guidelines for future LHC data analyses, by the ATLAS and CMS experiments, to identify specific benchmark points aimed at revealing the underlying model.http://link.springer.com/article/10.1007/JHEP08(2017)132Beyond Standard ModelHiggs PhysicsCP violationSupersymmetric Standard Model |
| spellingShingle | Margarete Mühlleitner Marco O. P. Sampaio Rui Santos Jonas Wittbrodt Phenomenological comparison of models with extended Higgs sectors Journal of High Energy Physics Beyond Standard Model Higgs Physics CP violation Supersymmetric Standard Model |
| title | Phenomenological comparison of models with extended Higgs sectors |
| title_full | Phenomenological comparison of models with extended Higgs sectors |
| title_fullStr | Phenomenological comparison of models with extended Higgs sectors |
| title_full_unstemmed | Phenomenological comparison of models with extended Higgs sectors |
| title_short | Phenomenological comparison of models with extended Higgs sectors |
| title_sort | phenomenological comparison of models with extended higgs sectors |
| topic | Beyond Standard Model Higgs Physics CP violation Supersymmetric Standard Model |
| url | http://link.springer.com/article/10.1007/JHEP08(2017)132 |
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