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 2σ excess of the LEP \( Zb\overline{b} \) events at \( {m_{{b\overline{b}}}} \) ≃ 98 GeV can be explained by a singlet-like 98 GeV Higgs boson in the minimal PQ-NMSSM with low tan β, stops around or below 1 TeV, and light doublet-higgsinos around the weak scale.
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Choi, K., Im, S.H., Jeong, K.S. et al. Higgs phenomenology in the Peccei-Quinn invariant NMSSM. J. High Energ. Phys. 2014, 72 (2014). https://doi.org/10.1007/JHEP01(2014)072
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DOI: https://doi.org/10.1007/JHEP01(2014)072