Abstract
We propose two new benchmark scenarios for Higgs-boson searches in the Minimal Supersymmetric Standard Model (MSSM ). These scenarios are specifically designed for the low tan beta region. A light Higgs-boson mass prediction compatible with the observed value of 125,hbox {GeV} is ensured in almost the entire parameter space by employing a flexible supersymmetric (SUSY) mass scale, reaching values of up to 10^{16},hbox {GeV}. The MSSM Higgs-sector predictions are evaluated in an effective field theory (EFT ) framework that exhibits a Two-Higgs-Doublet-Model at the low scale. In the first scenario all SUSY particles are relatively heavy, whereas the second scenario features light neutralinos and charginos. Both scenarios are largely compatible with the most recent results from Run 2 of the LHC , and we highlight the main phenomenological features relevant for future LHC searches. In particular, we provide a detailed discussion of heavy Higgs-boson decays to neutralinos and charginos in the second scenario, and the arising collider signatures, in order to facilitate the design of dedicated LHC searches in the near future.
Highlights
The last free parameter in the Standard Model (SM) of particle physics, namely the mass of the Higgs boson that was discovered at the Large Hadron Collider (LHC) [1,2], was determined duringRun of the LHC to M obs H SM =125.09 ± 0.24 GeV [3]
We propose two new benchmark scenarios for Higgs-boson searches in the Minimal Supersymmetric Standard Model (MSSM)
Those works show that a substantial part of the parameter space in the “low-tan β-high” scenario yields a prediction for the light Higgs-bosons mass, Mh, which is much lower than the measured value and the “low-tan β-high” scenario is ruled out. It is the goal of this paper to define new scenarios valid at low values of tan β in the framework of a low-energy 2HDM. This region of low tan β is the region of validity of the hMSSM [36,37,38], an approximation of the MSSM Higgs sector, which assumes that the dominant correction to Higgs boson masses and mixing have a common origin: they stem from the top-quark and its SUSY partners, the stops, entering a single element of the neutral CP-even Higgsboson mass matrix only
Summary
The last free parameter in the Standard Model (SM) of particle physics, namely the mass of the Higgs boson that was discovered at the Large Hadron Collider (LHC) [1,2], was determined during. [20] the supersymmetric partners of the SM fermions (sfermions) are tied to the TeV scale In this case, the parameter region tan β 5 is ruled out because the mass of the SM-like Higgs boson, Mh, is predicted to be lower than the measured value. It is the goal of this paper to define new scenarios valid at low values of tan β in the framework of a low-energy 2HDM This region of low tan β is the region of validity of the hMSSM [36,37,38], an approximation of the MSSM Higgs sector, which assumes that the dominant correction to Higgs boson masses and mixing have a common origin: they stem from the top-quark and its SUSY partners, the stops, entering a single element of the neutral CP-even Higgsboson mass matrix only.
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