Higgs phenomenology in the Peccei-Quinn invariant NMSSM

Abstract

We study the Higgs phenomenology in the Peccei-Quinn invariant NMSSM (PQ-NMSSM) where the low energy mass parameters of the singlet superfield are induced by a spontaneous breakdown of the Peccei-Quinn symmetry. In the generic NMSSM, scalar mixing among CP-even Higgs bosons is constrained by the observed properties of the SM-like Higgs boson, as well as by the LEP bound on the chargino mass and the perturbativity bound on the singlet Yukawa coupling. In the minimal PQ-NMSSM, scalar mixing is further constrained due to the presence of a light singlino-like neutralino. It is noticed that the $2\sigma$ excess of the LEP $Zb\bar{b}$ events at $m_{b\bar{b}}\simeq$ 98 GeV can be explained by a singlet-like 98 GeV Higgs boson in the minimal PQ-NMSSM with low $\tan \beta$, stops around or below 1 TeV, and light doublet-higgsinos around the weak scale.

31 pages, 4 figures; v2: references added, light stop effects discussed, bound on the Higgs invisible decay rate corrected

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• Search for Neutral MSSM Higgs Bosons at LEP
• New Regions in the NMSSM with a 125 GeV Higgs
• The generalised NMSSM at one loop: fine tuning and phenomenology
• Phenomenology of the nMSSM from colliders to cosmology
• Thermal inflation, baryogenesis and axions
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Cited by in corpus (9)

• The diphoton signal of the light Higgs boson in Natural NMSSM
• Discovery Prospects for NMSSM Higgs Bosons at the High-Energy Large Hadron Collider
• Discovery Prospects of a Light Scalar in the NMSSM
• Light Higgs bosons in the general NMSSM
• Light Higgsino Decays as a Probe of the NMSSM
• Higgs Mixing in the NMSSM and Light Higgsinos
• Next-to-Leading Order NMSSM Decays with CP-odd Higgs Bosons and Stops
• Peccei-Quinn invariant singlet extended SUSY with anomalous U(1) gauge symmetry
• Next-to-minimal $R$-symmetric model: Dirac gaugino, Higgs mass and invisible width