NMSSM interpretations of the observed Higgs signal

We perform a parameter scan of the phenomenological Minimal Supersymmetric Standard Model (pMSSM) with eight parameters taking into account the experimental Higgs boson results from Run I of the LHC and further lowenergy observables. We investigate various MSSM interpretations of the Higgs signal at 125 GeV. First, we consider the case where the light CP-even Higgs boson of the MSSM is identified with the discovered Higgs boson. In this case it can impersonate the SM Higgs-like signal either in the decoupling limit, or in the limit of alignment without decoupling. In the latter case, the other states in the Higgs sector can also be light, offering good prospects for upcoming LHC searches and for searches at future colliders. Second, we demonstrate that the heavy CP-even Higgs boson is still a viable candidate to explain the Higgs signal -albeit only in a highly constrained parameter region, that will be probed by LHC searches for the CP-odd Higgs boson and the charged Higgs boson in the near future. As a guidance for such searches we provide new benchmark scenarios that can be employed to maximize the sensitivity of the experimental analysis to this interpretation. a

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“…(40). Once again, the non-decoupling behavior of h t is evident in the limit in which all supersymmetric parameters appearing in Eq.…”

Section: Implications Of the Wrong-higgs Couplingsmentioning

confidence: 79%

The light and heavy Higgs interpretation of the MSSM

et al. 2017

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“…In addition, the SUSY partner of the singlet Higgs (called the singlino) extends the neutralino sector to a total of five neu-tralinos. In the NMSSM the lightest but also the second lightest CP-even neutral Higgs boson can be interpreted as the signal observed at about 125 GeV, see, e.g., [11,12].…”

Section: Introductionmentioning

confidence: 99%

Precise prediction for the Higgs-boson masses in the $$\mu \nu $$ μ ν SSM

2018

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The μνSSM is a simple supersymmetric extension of the Standard Model (SM) capable of predicting neutrino physics in agreement with experiment. In this paper we perform the complete one-loop renormalization of the neutral scalar sector of the μνSSM with one generation of right-handed neutrinos in a mixed on-shell/DR scheme. The renormalization procedure is discussed in detail, emphasizing conceptual differences to the minimal (MSSM) and next-to-minimal (NMSSM) supersymmetric standard model regarding the field renormalization and the treatment of nonflavor-diagonal soft mass parameters, which have their origin in the breaking of R-parity in the μνSSM. We calculate the full one-loop corrections to the neutral scalar masses of the μνSSM. The one-loop contributions are supplemented by available MSSM higher-order corrections. We obtain numerical results for a SM-like Higgs boson mass consistent with experimental bounds. We compare our results to predictions in the NMSSM to obtain a measure for the significance of genuine μνSSM-like contributions. We only find minor corrections due to the smallness of the neutrino Yukawa couplings, indicating that the Higgs boson mass calculations in the μνSSM are at the same level of accuracy as in the NMSSM. Finally we show that the μνSSM can accomodate a Higgs boson that could explain an excess of γ γ events at ∼ 96 GeV as reported by CMS, as well as the 2 σ excess of bb events observed at LEP at a similar mass scale.

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“…While a MSSM pseudoscalar might still be comparatively light [2] (see also [3] for a discussion in the context of the NMSSM), the hypothesis of a dominantly doublet light CP-odd Higgs -already constrained (at least indirectly) by LEP [4] -is under increasing pressure from LHC searches [5,6] or flavour transitions, due to the correlation of doublet masses -implying that there exist a light CP-even and a comparatively light pair of charged Higgs states as well, all phenomenologically more conspicuous at colliders. Still, the situation is different for a singlet or a mixed pseudoscalar A 1 , since the mentioned correlation dissipates and the light CP-odd Higgs becomes largely independent from the rest of the Higgs sector.…”

Section: Jhep03(2017)052mentioning

confidence: 99%

Decays of a NMSSM CP-odd Higgs in the low-mass region

Domingo

2017

J. High Energ. Phys.

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A popular regime in the NMSSM parameter space involves a light CP-odd Higgs A 1 . This scenario has consequences for e.g. light singlino Dark Matter annihilating in the A 1 -funnel. In order to confront the pseudoscalar to experimental limits such as flavour observables, Upsilon decays or Beam-Dump experiments, it is necessary to control the interactions of this particle with hadronic matter and derive the corresponding decays. The partonic description cannot be relied upon for masses close to m A 1 ∼ 1 GeV and we employ a chiral lagrangian, then extended to a spectator model for somewhat larger masses, to describe the interplay of the CP-odd Higgs with hadrons. Interestingly, a mixing can develop between A 1 and neutral pseudoscalar mesons, leading to substantial hadronic decays and a coupling of A 1 to the chiral anomaly. Additionally, quartic A 1 -meson couplings induce tri-meson decays of the Higgs pseudoscalar. We investigate these effects and propose an estimate of the Higgs widths for masses below m A 1 3 GeV. While we focus on the case of the NMSSM, our results are applicable to a large class of models.

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NMSSM interpretations of the observed Higgs signal

Cited by 27 publications

References 144 publications

The light and heavy Higgs interpretation of the MSSM

The light and heavy Higgs interpretation of the MSSM

Precise prediction for the Higgs-boson masses in the $$\mu \nu $$ μ ν SSM

Decays of a NMSSM CP-odd Higgs in the low-mass region

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