Next-to-Minimal Supersymmetric Model Higgs Scenarios for Partially Universal GUT Scale Boundary Conditions

Abstract

We examine the extent to which it is possible to realize the NMSSM "ideal Higgs" models espoused in several papers by Gunion et al in the context of partially universal GUT scale boundary conditions. To this end we use the powerful methodology of nested sampling. We pay particular attention to whether ideal-Higgs-like points not only pass LEP constraints but are also acceptable in terms of the numerous constraints now available, including those from the Tevatron and $B$-factory data, $(g-2{)}_{\mu }$ and the relic density $\Omega h^2$. In general for this particular methodology and range of parameters chosen, very few points corresponding to said previous studies were found, and those that were found were at best $2\sigma$ away from the preferred relic density value. Instead, there exist a class of points, which combine a mostly singlet-like Higgs with a mostly singlino-like neutralino coannihilating with the lightest stau, that are able to effectively pass all implemented constraints in the region $80<m_h<100$. It seems that the spin-independent direct detection cross section acts as a key discriminator between ideal Higgs points and the hard to detect singlino-like points.

22 pages, 15 figures

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Cited by in corpus (6)

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• Naturalness and Fine Tuning in the NMSSM: Implications of Early LHC Results
• The Constrained NMSSM with a 126 GeV Higgs boson: A global analysis
• Singlino-dominated dark matter in $Z_3$-NMSSM
• LHC constraints on M_1/2 and m_0 in the semi-constrained NMSSM
• Reduced branching ratio for H -> AA -> 4 tau from A - eta_b mixing