Light Higgs bosons in the general NMSSM

Abstract

Physics beyond the Standard Model (SM) may manifest itself as small deviations from the SM predictions for Higgs signal strengths at 125 GeV. Then, a plausible and interesting possibility is that the Higgs sector is extended and at the weak scale there appears an additional Higgs boson weakly coupled to the SM sector. Combined with the LEP excess in $e^{+}{e}^{-}\to Z(h\to b\bar{b})$, the diphoton excess around 96 GeV recently reported by CMS may suggest such a possibility. We examine if those LEP and CMS excesses can be explained simultaneously by a singlet-like Higgs boson in the general next-to-minimal supersymmetric Standard Model (NMSSM). Higgs mixing in the NMSSM relies on the singlet coupling to the MSSM Higgs doublets and the higgsino mass parameter, and thus is subject to the constraints on these supersymmetric parameters. We find that the NMSSM can account for both the LEP and CMS excesses at 96 GeV while accommodating the observed 125 GeV SM-like Higgs boson. Interestingly, the required mixing angles constrain the heavy doublet Higgs boson to be heavier than about 500 GeV. We also show that the viable region of mixing parameter space is considerably modified if the higgsino mass parameter is around the weak scale, mainly because of the Higgs coupling to photons induced by the charged higgsinos.

arXiv comment1+16 pages, 4 figures, title changed, analyses improved, references added, matches journal version

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• Possible indications for new Higgs bosons in the reach of the LHC: N2HDM and NMSSM interpretations
• The CMS di-photon excess at 95 GeV in view of the LHC Run 2 results
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• The "96 GeV excess" at the LHC
• Multiphoton signals of a (96 GeV?) stealth boson
• Scotogenic $U(1{)}_{L_{\mu }-L_{\tau }}$ origin of $(g-2{)}_{\mu }$, W-mass anomaly and 95 GeV excess
• A 95 GeV Higgs Boson in the Georgi-Machacek Model
• Explanation of the 95 GeV $\gamma \gamma$ and $b\bar{b}$ excesses in the Minimal Left-Right Symmetric Model
• Dark Matter Phenomenology in 2HDMS in light of the 95 GeV excess
• $M_W$, Dark Matter and $a_{\mu }$ in the NMSSM
• Phenomenology of a Supersymmetric Model Inspired by Inflation
• High Precision Calculations of the Higgs Boson Mass
• 95 GeV light Higgs in the top-pair-associated diphoton channel at the LHC in the minimal dilaton model
• Interpretation of 95 GeV Excess within the Georgi-Machacek Model in Light of Positive Definiteness Constraints
• Exploring the phenomenology of weak adjoint scalars in minimal $R$-symmetric models
• Impact of LHC Higgs couplings measurements on bosonic decays of the neutral Higgs sector in the scNMSSM
• Reconciling Higgs physics and pseudo-Nambu-Goldstone dark matter in the S2HDM using a genetic algorithm
• Testing a 95 GeV Scalar at the CEPC with Machine Learning
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• Curing tachyonic tree-level syndrome in NMSSM light-singlet scenarios
• Phenomenology of the standard HVM and 95.4 GeV excess
• Constraining the light Higgs bosons in the GNMSSM with recent Higgs data
• Search for Dark Matter in 2HDMS at LHC and future Lepton Colliders
• Mounting evidence for a 95 GeV Higgs boson