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

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

2011-07-13

arxiv.org/abs/1107.2472v2

JHEP 09 (2011) 105

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 10 figures, bounds from Susy searches with ~1/fb included

Scientific paper

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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