Constraints on new physics from the Higgs and top masses

Ellwanger, Ulrich; Lindner, M.

doi:10.1016/0370-2693(93)91164-i

Cited by 38 publications

(26 citation statements)

References 35 publications

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“…Also two loop corrections to m h have been considered in the MSSM [2][3][4]; these have the tendency to lower the upper bound on m h by ∼ 10 GeV. The subject of the present paper is the next-to-minimal supersymmetric extension of the Standard Model ((M+1)SSM) [5][6][7][8][9][10][11][12][13] where a gauge singlet superfield S is added to the Higgs sector. It allows to omit the so-called µ term µH 1 H 2 in the superpotential of the MSSM, and to replace it by a Yukawa coupling (plus a singlet self coupling):…”

Section: Introductionmentioning

confidence: 99%

“…In view of ongoing Higgs searches at LEP2 [14][15][16] and, in the near future, at Tevatron Run II [17], it is important to check the model dependence of bounds on the Higgs mass. In the (M+1)SSM, the upper bound on the mass m 1 of the lightest CP even Higgs 1 differs from the one of the MSSM already at tree level: now we have [5,6] where g 1 and g 2 denote the U(1) Y and the SU(2) L gauge couplings. Note that, for λ < .53, m 1 is still bounded by M Z at tree level.…”

Section: Introductionmentioning

confidence: 99%

“…Large values of λ, λ > .7, are in any case prohibited, if one requires the absence of a Landau singularity for λ below the GUT scale [5,6]. Loop corrections to m 1 have also been considered in the (M+1)SSM [6]. Given m t and assuming again M susy < 1 TeV, the upper limit on m 1 at one loop is then ∼ 150 GeV.…”

Section: Introductionmentioning

confidence: 99%

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Masses and couplings of the lightest Higgs bosons in (M + 1)SSM

Ellwanger

Hugonie

2002

Eur. Phys. J. C

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We study the upper limits on the mass of the lightest and second lightest CP even Higgs bosons in the (M+1)SSM, the MSSM extended by a gauge singlet. The dominant two loop contributions to the effective potential are included, which reduce the Higgs masses by ∼ 10 GeV. Since the coupling R of the lightest Higgs scalar to gauge bosons can be small, we study in detail the relations between the masses and couplings of both lightest scalars. We present upper bounds on the mass of a 'strongly' coupled Higgs (R > 1/2) as a function of lower experimental limits on the mass of a 'weakly' coupled Higgs (R < 1/2). With the help of these results, the whole parameter space of the model can be covered by Higgs boson searches. *

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Masses and couplings of the lightest Higgs bosons in (M + 1)SSM

Ellwanger

Hugonie

2002

Eur. Phys. J. C

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“…The Renormalization Group equations (RGE's) for the Yukawa couplings of the NMSSM have been extensively studied in relation to the question of the absolute upper limit on the lightest CP-even Higgs mass [29,30]. If Λ is identified with the GUT scale, the perturbativity requirement implies λ ∼ < 0.87 and κ ∼ < 0.63 [12,31,29,20].…”

Section: Theoretical Prejudicementioning

confidence: 99%

Light axion within the next-to-minimal supersymmetric standard model

Dobrescu

Matchev

2000

J. High Energy Phys.

165

146

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Abstract:We analyze the Higgs sector in the Next-to-Minimal Supersymmetric Standard Model, emphasizing the possibility of a light CP-odd scalar (axion) in the spectrum. We compute the coupling of the Standard-Model-like Higgs boson to a pair of axions, and show that it can be large enough to modify the Higgs branching fractions, with a significant impact on the Higgs searches. We delineate the range of parameters relevant for this scenario, and also derive analytic expressions for the scalar masses and couplings in two special cases -a decoupling limit where all scalars other than the axion are heavier than the Standard-Model-like Higgs boson, and the large tan β limit.

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“…Refs. [116][117][118][119][120][121][122][123][124]. This topic has also been analyzed from the perspective of a diagrammatic expansion, including radiative corrections from part or the full set of the particle content of the NMSSM: see Refs.…”

Section: Renormalization Of the Higgs Potentialmentioning

confidence: 99%

On-shell neutral Higgs bosons in the NMSSM with complex parameters

2017

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The Next-to-Minimal Supersymmetric Standard model (NMSSM) appears as an interesting candidate for the interpretation of the Higgs measurement at the LHC and as a rich framework embedding physics beyond the Standard Model. We consider the renormalization of the Higgs sector of this model in its CP-violating version, and propose a renormalization scheme for the calculation of on-shell Higgs masses. Moreover, the connection between the physical states and the tree-level ones is no longer trivial at the radiative level: a proper description of the corresponding transition thus proves necessary in order to calculate Higgs production and decays at a consistent loop order. After discussing these formal aspects, we compare the results of our mass calculation to the output of existing tools. We also study the relevance of the on-shell transition matrix in the example of the h i → τ + τ − width. We find deviations between our full prescription and popular approximations that can exceed 10%.

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Constraints on new physics from the Higgs and top masses

Cited by 38 publications

References 35 publications

Masses and couplings of the lightest Higgs bosons in (M + 1)SSM

Masses and couplings of the lightest Higgs bosons in (M + 1)SSM

Light axion within the next-to-minimal supersymmetric standard model

On-shell neutral Higgs bosons in the NMSSM with complex parameters

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