Is the LHC observing the pseudoscalar state of a two-Higgs-doublet model?

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorBurdman, Gustavo-
Autor(es): dc.creatorHaluch, Carlos E. F.-
Autor(es): dc.creatorMatheus, Ricardo D.-
Data de aceite: dc.date.accessioned2025-08-21T20:35:25Z-
Data de disponibilização: dc.date.available2025-08-21T20:35:25Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2012-05-21-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.85.095016-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/226828-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/226828-
Descrição: dc.descriptionThe ATLAS and CMS collaborations have recently shown data suggesting the presence of a Higgs boson in the vicinity of 125 GeV. We show that a two-Higgs-doublet model spectrum, with the pseudoscalar state being the lightest, could be responsible for the diphoton signal events. In this model, the other scalars are considerably heavier and are not excluded by the current LHC data. If this assumption is correct, future LHC data should show a strengthening of the γγ signal, while the signals in the ZZ( *)→4ℓ and WW( *)→2ℓ2ν channels should diminish and eventually disappear, due to the absence of diboson tree-level couplings of the CP-odd state. The heavier CP-even neutral scalars can now decay into channels involving the CP-odd light scalar which, together with their larger masses, allow them to avoid the existing bounds on Higgs searches. We suggest additional signals to confirm this scenario at the LHC, in the decay channels of the heavier scalars into AA and AZ. Finally, this inverted two-Higgs-doublet spectrum is characteristic in models where fermion condensation leads to electroweak symmetry breaking. We show that in these theories it is possible to obtain the observed diphoton signal at or somewhat above the prediction for the standard model Higgs for the typical values of the parameters predicted. © 2012 American Physical Society.-
Descrição: dc.descriptionInstituto de Física Universidade de São Paulo, São Paulo-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, São Paulo-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, São Paulo-
Idioma: dc.languageen-
Relação: dc.relationPhysical Review D - Particles, Fields, Gravitation and Cosmology-
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Título: dc.titleIs the LHC observing the pseudoscalar state of a two-Higgs-doublet model?-
Tipo de arquivo: dc.typelivro digital-
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