Hefty MSSM-like light Higgs in extended gauge models

Hirsch, Martin; Malinský, Michal; Porod, W.; Reichert, Laslo; Staub, Florian

doi:10.1007/jhep02(2012)084

Cited by 44 publications

(58 citation statements)

References 74 publications

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“…This allows for large Yukawa couplings compatible with a low (TeV or even lower) mass for the seesaw mediators. With this combination, one expects a very rich phenomenology, including sizable LFV rates and additional contributions to the radiative corrections to the Higgs mass [60][61][62]. In the supersymmetric (SUSY) version of the ISS, the new singlet fermions are promoted to singlet superfields.…”

Section: Introductionmentioning

confidence: 99%

Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions

Abada

Krauss

Porod

et al. 2014

J. High Energ. Phys.

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113

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Taking the supersymmetric inverse seesaw mechanism as the explanation for neutrino oscillation data, we investigate charged lepton flavor violation in radiative and 3-body lepton decays as well as in neutrinoless µ − e conversion in muonic atoms. In contrast to former studies, we take into account all possible contributions: supersymmetric as well as non-supersymmetric. We take CMSSM-like boundary conditions for the soft supersymmetry breaking parameters. We find several regions where cancellations between various contributions exist, reducing the lepton flavor violating rates by an order of magnitude compared to the case where only the dominant contribution is taken into account. This is in particular important for the correct interpretation of existing data as well as for estimating the reach of near future experiments where the sensitivity will be improved by one to two orders of magnitude. Moreover, we demonstrate that ratios like BR(τ → 3µ)/BR(τ → µe + e − ) can be used to determine whether the supersymmetric contributions dominate over the W ± and H ± contributions or vice versa.

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Section: Introductionmentioning

confidence: 99%

Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions

Abada

Krauss

Porod

et al. 2014

J. High Energ. Phys.

Self Cite

113

View full text Add to dashboard Cite

show abstract

“…Here, we want to stress that one should be careful with models with extended Higgs sector because not all scalar masses become automatically large if M SUSY is large. Examples are for instance models with extended gauge sectors in which a second light scalar can appear because of D-flat directions [68][69][70]. In these cases, a sizeable mixing between the SMlike Higgs and another scalar can be present, i.e.…”

Section: Higgs Mass Beyond the Mssmmentioning

confidence: 99%

Improved predictions for intermediate and heavy supersymmetry in the MSSM and beyond

Staub

Porod

2017

Eur. Phys. J. C

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For a long time, the minimal supersymmetric standard model (MSSM) with light masses for the supersymmetric states was considered as the most natural extension of the Standard Model of particle physics. Consequently, a valid approximation was to match the MSSM to the precision measurement directly at the electroweak scale. This approach was also utilized by all dedicated spectrum generators for the MSSM. However, the higher the supersymmetric (SUSY) scale is, the bigger the uncertainties which are introduced by this matching. We point out important consequences of a two-scale matching, where the running parameters within the SM are calculated at M Z and evaluated up to the SUSY scale, where they are matched to the full model. We show the impact on gauge coupling unification as well as the SUSY mass spectrum. Also the Higgs mass prediction for large supersymmetric masses has been improved by performing the calculation within an effective SM. The approach presented here is now also available in the spectrum generator SPheno. Moreover, also SARAH was extended accordingly and gives the possibility to study these effects now in many different supersymmetric models.

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“…21. We find the very strong dependence on tan β X , known in many U (1) extensions [468,470,471]. One difference here is that, due 19 Branching ratios of the 750 GeV CP-odd particle (left), and a CP-even scalar (right) close in mass as function of λ.…”

Section: Constraints From Higgs Coupling Measurementsmentioning

confidence: 65%

Precision tools and models to narrow in on the 750 GeV diphoton resonance

et al. 2016

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The hints for a new resonance at 750 GeV from ATLAS and CMS have triggered a significant amount of attention. Since the simplest extensions of the standard model cannot accommodate the observation, many alternatives have been considered to explain the excess. Here we focus on several proposed renormalisable weakly-coupled models and revisit results given in the literature. We point out that physically important subtleties are often missed or neglected. To facilitate the study of the excess we have created a collection of 40 model files, selected from recent literature, for the Mathematica package SARAH. With SARAH one can generate files to perform numerical studies using the tailormade spectrum generators FlexibleSUSY and SPheno. These have been extended to automatically include crucial higher order corrections to the diphoton and digluon decay rates for both CP-even and CP-odd scalars. Additionally, we have extended the UFO and CalcHep interfaces of SARAH, a

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Hefty MSSM-like light Higgs in extended gauge models

Cited by 44 publications

References 74 publications

Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions

Lepton flavor violation in low-scale seesaw models: SUSY and non-SUSY contributions

Improved predictions for intermediate and heavy supersymmetry in the MSSM and beyond

Precision tools and models to narrow in on the 750 GeV diphoton resonance

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