Highly enhanced contributions of heavy Higgs bosons and new leptons to muon $g-2$ and prospects at future colliders

Abstract

We show that in a two Higgs doublet model type-II extended by vectorlike leptons the contributions from heavy neutral and charged Higgs bosons to the anomalous magnetic moment of the muon simultaneously feature chiral enhancement from masses of new leptons and ${\tan }^2\beta$ enhancement from couplings of Higgs bosons. Assuming moderate values of new Yukawa couplings, not exceeding one, that can remain perturbative to very high energy scales, the measured value of muon $g-2$ can be explained within one standard deviation even with 6.5 TeV leptons or 20 TeV Higgs bosons. Allowing new couplings near the perturbativity limit, these mass ranges extend to 45 TeV for leptons and 190 TeV for Higgs bosons. In spite of the high scale of new physics this scenario can be completely probed at planned future colliders.

5 pages, 4 figures. v2: Updated value of muon g-2, title slightly changed, and discussion added to match published version

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Cited by in corpus (22)

• New physics explanations of $a_{\mu }$ in light of the FNAL muon $g-2$ measurement
• Consequences of chirally enhanced explanations of $(g-2{)}_{\mu }$ for $h\to \mu \mu$ and $Z\to \mu \mu$
• Challenges for an axion explanation of the muon $g-2$ measurement
• Muon $g-2$ in two Higgs doublet models with vectorlike leptons
• $(\mathbf{g}-2{)}_{\mathbf{e},\mathbf{\mu }}$ in an extended inverse type-III seesaw
• $(g-2{)}_{\mu }$ in the 2HDM and slightly beyond -- an updated view
• Di-Higgs and tri-Higgs boson signals of muon $g-2$ at a muon collider
• Tau-jet signatures of vectorlike quark decays to heavy charged and neutral Higgs bosons
• The Ellipse of Muon Dipole Moments
• Collider signatures of vector-like fermions from a flavor symmetric model
• Flavor Seesaw Mechanism
• Current status on pair-produced muon-philic vectorlike leptons in multilepton channels at the LHC
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• Leptonic cascade decays of a heavy Higgs boson through vectorlike leptons at the LHC
• Predictions for Muon Electric and Magnetic Dipole Moments from $h\to {\mu }^{+}{\mu }^{-}$ in Two-Higgs-Doublet Models with New Leptons
• High-energy frontier of the muon g-2 at a muon collider
• Investigation of $(g-2{)}_{\mu }$ anomaly in the $\mu$-specific 2HDM with Vector like leptons and the phenomenological implications
• Multi Higgs Boson Signals of a Modified Muon Yukawa Coupling at a Muon Collider
• The Two Scales of New Physics in Higgs Couplings
• Connecting $(g-2{)}_{\mu }$ to neutrino mass in the extended neutrinophilic 2HDM
• Two-Higgs Doublet Model Effective Field Theory
• On-shell Renormalization with Vector-like Leptons, One-loop Muon-Higgs Coupling and Muon g-2