The fine-tuning of the generalised NMSSM [PDF]
Graham G. Ross, Kai Schmidt-HobergWe determine the degree of fine-tuning needed in a generalised version of the NMSSM that follows from an underlying Z4 or Z8 R-symmetry. We find that it is significantly less than is found in the MSSM or NMSSM and extends the range of Higgs mass that have acceptable fine-tuning. Remarkably the minimal fine-tuning is achieved for Higgs masses of around 130 GeV.View original: http://arxiv.org/abs/1108.1284
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