Explicit<i>CP</i>violation of the Higgs sector in the next-to-minimal supersymmetric standard model

Matsuda, Masahisa; Tanimoto, Morimitsu

doi:10.1103/physrevd.52.3100

Cited by 34 publications

(51 citation statements)

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“…By assuming the degeneracy of the top scalar-quark masses in the Higgs sector of the NMSSM, it is found that large explicit CP violation may be realized as the vacuum expectation value (VEV) of the neutral Higgs singlet approaches to the electroweak scale [13].…”

Section: Introductionmentioning

confidence: 99%

Charged Higgs boson in the next-to-minimal supersymmetric standard model with explicitCPviolation

Ham

Kim

et al. 2001

Phys. Rev. D

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The phenomenology of the explicit CP violation in the Higgs sector of the next-to-minimal supersymmetric standard model (NMSSM) is investigated, with emphasis on the charged Higgs boson. The radiative corrections due to both quarks and scalar-quarks of the third generation are taken into account, and the negative result of the search for the Higgs bosons at CERN LEP2, with the discovery limit of 0.1 pb, is imposed as a constraint. It is found that there are parameter regions of the NMSSM where the lightest neutral Higgs boson may even be massless, without being detected at LEP2. This implies that the LEP2 data do not contradict the existence of a massless neutral Higgs boson in the NMSSM. For the charged Higgs boson, the radiative corrections to its mass may be negative in some parameter regions of the NMSSM. The phenomenological lower bound on the radiatively corrected mass of the charged Higgs boson is increased as the CP violation becomes maximal, i.e., as the CP violating phase becomes π/2. At the maximal CP violation, its lower bound is about 110 GeV for 5 tan β 40. The vacuum expectation value (VEV) of the neutral Higgs singlet is shown to be no smaller than 16 GeV for any parameter values of the NMSSM with explicit CP violation. This value of the lower limit is found to increase up to about 45 GeV as the ratio (tan β) of the VEVs of the two Higgs doublets decreases to smaller values (∼ 2). The discovery limit of the Higgs boson search at LEP2 is found to cover about a half of the kinematically allowed part of the whole parameter space of the NMSSM, and the portion is roughly stable against the CP violating phase.1

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Section: Introductionmentioning

confidence: 99%

Charged Higgs boson in the next-to-minimal supersymmetric standard model with explicitCPviolation

Ham

Kim

et al. 2001

Phys. Rev. D

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“…Multi-purpose programs can also be used in connection to the (complex) NMSSM and allow for a number of similar manipulations, provided the implementation of a model-file as input: this applies to SPHENO [35][36][37][38] or FlexibleSUSY [39,40] -which are usually coupled to SARAH [41][42][43][44] to produce their input file. The Higgs-sector of the complex NMSSM and its phenomenology have been previously considered in several earlier works [45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63].…”

Section: Jhep06(2015)052mentioning

confidence: 99%

A new tool for the study of the CP-violating NMSSM

Domingo

2015

J. High Energ. Phys.

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Supersymmetric extensions of the Standard Model open up the possibility for new types of CP-violation. We consider the case of the Next-to-Minimal Supersymmetric Standard Model where, beyond the phases from the soft lagrangian, CP-violation could enter the Higgs sector directly at tree-level through complex parameters in the superpotential. We develop a series of Fortran subroutines, cast within the public tool NMSSMTools and allowing for a phenomenological analysis of the CP-violating NMSSM. This new tool performs the computation of the masses and couplings of the various new physics states in this model: leading corrections to the sparticle masses are included; the precision for the Higgs masses and couplings reaches the full one-loop and leading two-loop order. The two-body Higgs and top decays are also attended. We use the public tools HiggsBounds and HiggsSignals to test the Higgs sector. Additional subroutines check the viability of the sparticle spectrum in view of LEP-limits and constrain the phases of the model via a confrontation to the experimentally measured Electric Dipole Moments. These tools will be made publicly available in the near future. In this paper, we detail the workings of our code and illustrate its use via a comparison with existing results. We also consider some consequences of CP-violation for the NMSSM Higgs sector.

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“…An extension with an extra singlet superfield, known as the next-to-minimal supersymmetric standard model (NMSSM) [1][2][3][4][5] was motivated to provide a natural solution to the µ problem. The µ parameter in the term µH u H d of the superpotential of the MSSM naturally has its value at either M Planck or zero (due to a symmetry).…”

Section: Introductionmentioning

confidence: 99%

Higgs boson sector of the next-to-minimal supersymmetric standard model withCPviolation

et al. 2010

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We perform a comprehensive study of the Higgs sector in the framework of the next-to-minimal supersymmetric standard model with CP-violating parameters in the superpotential and in the soft-supersymmetry-breaking sector. Since the CP is no longer a good symmetry, the two CP-odd and the three CP-even Higgs bosons of the next-to-minimal supersymmetric standard model in the CP-conserving limit will mix. We show explicitly how the mass spectrum and couplings to gauge bosons of the various Higgs bosons change when the CP-violating phases take on nonzero values. We include full one-loop and the logarithmically enhanced two-loop effects employing the renormalization-group (RG) improved approach. In addition, the LEP limits, the global minimum condition, and the positivity of the square of the Higgs-boson mass have been imposed. We demonstrate the effects on the Higgs-mass spectrum and the couplings to gauge bosons with and without the RG-improved corrections. Substantial modifications to the allowed parameter space happen because of the changes to the Higgs-boson spectrum and their couplings with the RG-improved corrections. Finally, we calculate the mass spectrum and couplings of the few selected scenarios and compare to the previous results in literature where possible; in particular, we illustrate a scenario motivated by electroweak baryogenesis.

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ExplicitCPviolation of the Higgs sector in the next-to-minimal supersymmetric standard model

Cited by 34 publications

References 50 publications

Charged Higgs boson in the next-to-minimal supersymmetric standard model with explicitCPviolation

Charged Higgs boson in the next-to-minimal supersymmetric standard model with explicitCPviolation

A new tool for the study of the CP-violating NMSSM

Higgs boson sector of the next-to-minimal supersymmetric standard model withCPviolation

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