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arXiv · 1107.2472

Naturalness and Fine Tuning in the NMSSM: Implications of Early LHC Results

Ulrich Ellwanger·Gregory Espitalier-Noel·Cyril Hugonie
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Abstract

We study the fine tuning in the parameter space of the semi-constrained NMSSM, where most soft Susy breaking parameters are universal at the GUT scale. We discuss the dependence of the fine tuning on the soft Susy breaking parameters M_1/2 and m0, and on the Higgs masses in NMSSM specific scenarios involving large singlet-doublet Higgs mixing or dominant Higgs-to-Higgs decays. Whereas these latter scenarios allow a priori for considerably less fine tuning than the constrained MSSM, the early LHC results rule out a large part of the parameter space of the semi-constrained NMSSM corresponding to low values of the fine tuning.

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Ulrich Ellwanger, Gregory Espitalier-Noel, Cyril Hugonie. 2011-09-12. Naturalness and Fine Tuning in the NMSSM: Implications of Early LHC Results. https://doi.org/10.1007/jhep09(2011)105

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