NMSSM+

Abstract

It is well known that the scale invariant NMSSM has lower fine-tuning than the MSSM, but suffers from the domain wall problem. We propose a new improved scale invariant version of the NMSSM, called the NMSSM+, which introduces extra matter in order to reduce even more the fine-tuning of the NMSSM. The NMSSM+ also provides a resolution of the domain wall problem of the NMSSM due to a discrete R-symmetry, which also stabilises the proton. The extra matter descends from an E6 gauge group and fills out three complete 27-dimensional representations at the TeV scale, as in the E6SSM. However the U(1)_N gauge group of the E6SSM is broken at a high energy scale leading to reduced fine-tuning. The extra matter of the NMSSM+ includes charge 1/3 colour triplet D-fermions which may be naturally heavier than the weak scale because they receive their mass from singlet field vacuum expectation values other than the one responsible for the weak scale effective μ parameter.

25 pages, minor changes, references added

References in corpus (9)

• Neutrinoless Double Beta Decay and Physics Beyond the Standard Model
• Supersymmetric Hybrid Inflation with Non-Minimal Kahler potential
• The generalised NMSSM at one loop: fine tuning and phenomenology
• Gauge Coupling Unification in the Exceptional Supersymmetric Standard Model
• Minimal E_6 Supersymmetric Standard Model
• Phenomenology of the nMSSM from colliders to cosmology
• Planck Scale Unification in a Supersymmetric Standard Model
• E${}_6$SSM
• Bino Dark Matter and Big Bang Nucleosynthesis in the Constrained E6SSM with Massless Inert Singlinos

Cited by in corpus (7)

• 750 GeV Diphoton Resonance from Singlets in an Exceptional Supersymmetric Standard Model
• 750 GeV Diphoton excess from $E_6$ in F-theory GUTs
• Quasi-fixed point scenarios and the Higgs mass in the E6 inspired SUSY models
• E6 Models from F-theory
• Naturalness of scale-invariant NMSSMs with and without extra matter
• Little Z' Models
• Relaxing the Landau-pole constraint in the NMSSM with the Abelian gauge symmetries