Does LEP prefer the NMSSM?
M. Bastero-Gil, C. Hugonie, S. F. King, D. P. Roy, S. Vempati
Abstract
We study the naturalness of electroweak symmetry breaking and baryogenesis in the next-to-minimal supersymmetric standard model (NMSSM). Our study is motivated by the recent LEP bounds on the Higgs boson mass which severely constrains the low βregion of the minimal supersymmetric standard model (MSSM). We show that the low βregion of the NMSSM is clearly favoured over the MSSM with regard to the physical Higgs boson mass, fine-tuning, and electroweak baryogenesis.
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