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Unified Interpretation of 95 GeV Excesses in the Two Higgs Doublet type II Seesaw Model
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abstract
In the search for a light Higgs boson, the ATLAS and CMS experiments have observed excesses in both the diphoton ($\gamma\gamma$) and di-tau-pair ($\tau^+\tau^-$) decay channels at about $95$ GeV. The LEP collaboration has also previously reported an excess in the $b\bar{b}$ channel at a comparable Higgs mass. In this paper, we explore whether these excesses can be accommodated within the framework of the Two Higgs Doublet type II Seesaw Model (2HDMcT). By implementing various theoretical constraints and experimental limits on the parameter space, we first demonstrate that a light CP-even Higgs boson, $h_1$, with a mass around 95 GeV can simultaneously account for the excesses observed in the $\gamma\gamma$ and $b\bar{b}$ channels, provided a Type I Yukawa texture is employed. More interestingly, our analysis shows that the three excesses in $\gamma\gamma$, $b\bar{b}$ and $\tau^+\tau^-$ channels can well be accommodated simultaneously, reaching a $0.64 \sigma$ C.L. if the CP-odd Higgs boson $A_1$ is nearly mass degenerate and superposed to the light CP-even Higgs $h_1$.
Forward citations
Cited by 6 Pith papers
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Probing Doubly Charged Higgs Bosons with Three-Body Associated Production at Future $e^+e^-$ Colliders
Doubly charged Higgs bosons in the type-II seesaw 2HDM can be produced via 2-to-3 associated channels at e+e- colliders with cross sections up to ~10^2 fb and good 4-lepton discovery sensitivity.
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Light Scalars in the Extended Georgi-Machacek Model
A global fit of the Georgi-Machacek and extended Georgi-Machacek models finds that the 95 GeV diphoton and bottom-quark excesses are compatible with the 125 GeV Higgs data, while the ditau excess is not, and it sets u...
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Interpretation of 95 GeV Excess within the Georgi-Machacek Model in Light of Positive Definiteness Constraints
The Georgi-Machacek model keeps viable parameter space for the 95 GeV diphoton and bbbar excesses under positive definiteness constraints, which the paper finds expand the allowed region relative to tree-level bounded...
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96 GeV Scalar Boson in the 2HDM with U(1)_H Gauge Symmetry
Type-II and Type-Y two-Higgs-doublet models with a gauged U(1)_H symmetry can accommodate the 96 GeV diphoton, ditau, and bbbar excesses within 2 sigma, with the light scalar mostly a new singlet.
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A comprehensive study of the charged Higgs boson in the two Higgs doublet type-II seesaw model
Charged Higgs production rates and 5-sigma discovery regions at a 3 TeV muon collider are computed for the 2HDMcT Type-III seesaw model, with the H1+ H1- channel exceeding the e+e- rate.
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Exploring Potential Higgs Resonances at 650 GeV and 95 GeV in the 2HDM Type III
In a 2HDM Type III, a 650 GeV CP-odd Higgs decaying via H(125)Z with H->γγ and Z->bb, plus a 95 GeV light Higgs, can accommodate both the CMS 650 GeV and the 95 GeV diphoton excesses at about 2.5 sigma.
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