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Seesaw lepton masses and muon g-2 from heavy vector-like leptons
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Seesaw lepton masses and muon g-2 from heavy vector-like leptons
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We propose a model for the vector-like lepton to explain the small muon mass by a seesaw mechanism, based on lepton-specific two Higgs doublet models with a local $U(1)'$ symmetry. There is no bare muon mass for a nonzero $U(1)'$ charge of the leptophilic Higgs doublet, so the physical muon mass is generated due to the mixing between the vector-like lepton and the muon after the leptophilic Higgs doublet and the dark Higgs get VEVs. In this scenario, the non-decoupling effects of the vector-like lepton give rise to leading contributions to the muon $g-2$, thanks to the light $Z'$ and the light dark Higgs boson. We discuss various constraints on the model from lepton flavor violation, electroweak precision and Higgs data, as well as collider searches.
Forward citations
Cited by 1 Pith paper
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Implications of portal vector-like lepton on associated Higgs production at a multi-TeV muon collider
At a future muon collider, Higgs production with an invisible dark photon could outshine Higgs+Z by 1–100 times in a vector-like-lepton portal model, giving a kinetic-mixing-independent dark photon probe.
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