Mass bounds in a model with a triplet Higgs

Forshaw, J. R.; Vera, A. Sabio; White, Benjamin E.

doi:10.1088/1126-6708/2003/06/059

Cited by 44 publications

(32 citation statements)

References 7 publications

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“…Hence, it is important to clarify allowed regions in the parameter space not only by using current experimental data but also by investigating theoretical consistencies such as perturbative unitarity [13,14], vacuum stability and triviality [15]. This kind of study has been often developed to constrain parameters of the Higgs sector in the context of the two-Higgs-doublet model [16,17,18,19], and in a specific triplet model [20].…”

Section: Introductionmentioning

confidence: 99%

Unitarity bounds in the Higgs model including triplet fields with custodial symmetry

Aoki

Kanemura

2008

Phys. Rev. D

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We study bounds on Higgs boson masses from perturbative unitarity in the Georgi-Machacek model, whose Higgs sector is composed of a scalar isospin doublet, a real and a complex isospin triplet fields. This model can be compatible with the electroweak precision data without fine tuning because of the imposed global SU (2) R symmetry in the Higgs potential, by which the electroweak rho parameter is unity at the tree level. All possible two-body elastic-scattering channels are taken into account to evaluate the S-wave amplitude matrix, and then the condition of perturbative unitarity is imposed on the eigenvalues to obtain constraint on the Higgs parameters. Masses of all scalar bosons turn out to be bounded from above, some of which receive more strict upper bounds as compared to that in the standard model (712 GeV). In particular, the upper bound of the lightest scalar boson, whatever it would be, is about 270 GeV.

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Section: Introductionmentioning

confidence: 99%

Unitarity bounds in the Higgs model including triplet fields with custodial symmetry

Aoki

Kanemura

2008

Phys. Rev. D

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“…The possibility of extending the SM with a real SU(2) W triplet scalar has been extensively studied [21][22][23][24][25][26][27][28][29][30] since such extensions generally lead to suppressed contributions to electroweak precision observables (EWPO). The scalar Lagrangian for a toy model including all possible gauge invariant combinations of a Higgs doublet, H , and an SU(2) W triplet, , given by…”

Section: Real Scalar Tripletmentioning

confidence: 99%

“…The corrections to S, T and U can be parametrized as [17] Contributions to the oblique parameters from a real scalar triplet have been studied in [23][24][25][26][27][28], and are given by…”

Section: Oblique Parametersmentioning

confidence: 99%

Vector-like quarks with a scalar triplet

2015

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We study a minimal extension to the Standard Model with an additional real scalar triplet, $\Sigma$, and a single vector-like quark, $T$. This class of models appear naturally in extensions of the Littlest Higgs model that incorporate dark matter without the need of $T$-parity. We assume the limit that the triplet does not develop a vacuum expectation value and that all dimension five operators coupling the triplet to Standard Model fields and the vector-like quarks are characterized by the scale $\Lambda$ at which we expect new physics to arise. We introduce new non-renormalizable interactions between the new scalar sector and fermion sector that allow mixing between the Standard Model third generation up-type quark and the vector-like quark in a way that leads to the cancellation of the leading quadratic divergences to the one-loop corrections from the top quark to the mass of the Higgs boson. Within this framework, new decay modes of the vector-like quark to the real scalar triplet and SM particles arise and bring forth an opportunity to probe this model with existing and future LHC data. We contrast constraints from direct colliders searches with low energy precision measurements and find that heavy vector-like top quarks with a mass as low as $650$ GeV are consistent with current experimental constraints in models where new physics arises at scales below $2$ TeV

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“…The contributions to the effective Higgs potential from the new scalars (H, H ± ) of the inert scalar triplet are given by [21] …”

Section: Metastability In Itm (Y = 0)mentioning

confidence: 99%

“…[21]. Two different renormalization schemes, electroweak precision, and decoupling of Higgs triplet scenario have been discussed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Exploring the hyperchargeless Higgs triplet model up to the Planck scale

Khan

2018

Eur. Phys. J. C

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We examine an extension of the SM Higgs sector by a Higgs triplet taking into consideration the discovery of a Higgs-like particle at the LHC with mass around 125 GeV. We evaluate the bounds on the scalar potential through the unitarity of the scattering matrix. Considering the cases with and without Z 2 -symmetry of the extra triplet, we derive constraints on the parameter space. We identify the region of the parameter space that corresponds to the stability and metastability of the electroweak vacuum. We also show that at large field values the scalar potential of this model is suitable to explain inflation.

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Mass bounds in a model with a triplet Higgs

Cited by 44 publications

References 7 publications

Unitarity bounds in the Higgs model including triplet fields with custodial symmetry

Unitarity bounds in the Higgs model including triplet fields with custodial symmetry

Vector-like quarks with a scalar triplet

Exploring the hyperchargeless Higgs triplet model up to the Planck scale

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