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arXiv · 1203.5048

Higgs bosons near 125 GeV in the NMSSM with constraints at the GUT scale

Ulrich Ellwanger·Cyril Hugonie
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Abstract

We study the NMSSM with universal Susy breaking terms (besides the Higgs sector) at the GUT scale. Within this constrained parameter space, it is not difficult to find a Higgs boson with a mass of about 125 GeV and an enhanced cross section in the diphoton channel. An additional lighter Higgs boson with reduced couplings and a mass <123 GeV is potentially observable at the LHC. The NMSSM-specific Yukawa couplings lambda and kappa are relatively large and tan(beta) is small, such that lambda, kappa and the top Yukawa coupling are of order 1 at the GUT scale. The lightest stop can be as light as 105 GeV, and the fine-tuning is modest. WMAP constraints can be satisfied by a dominantly higgsino-like LSP with substantial bino, wino and singlino admixtures and a mass of ~60-90 GeV, which would potentially be detectable by XENON100.

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Ulrich Ellwanger, Cyril Hugonie. 2012-03-22. Higgs bosons near 125 GeV in the NMSSM with constraints at the GUT scale. https://doi.org/10.1088/1475-7516%2F2012%2F07%2F024

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