2020.PhysRevD.102.095023.pdf (3.09 MB)
Model building from asymptotic safety with Higgs and flavor portals
journal contribution
posted on 2023-06-10, 02:46 authored by Gudrun Hiller, Clara Hormigos-Feliu, Daniel LitimDaniel Litim, Tom SteudtnerWe perform a comprehensive search for Standard Model extensions inspired by asymptotic safety. Our models feature a singlet matrix scalar field, three generations of vectorlike leptons, and direct links to the Higgs and flavor sectors via new Yukawa and portal couplings. A novel feature is that the enlarged scalar sector may spontaneously break lepton flavor universality. We provide a complete two-loop renormalization group analysis of the running gauge, Yukawa, and quartic couplings to find ultraviolet fixed points and the critical surface of parameters, i.e., the set of boundary conditions at the TeV scale for which models remain well-behaved and predictive up to the Planck scale without encountering Landau poles or instabilities. This includes templates for asymptotically safe Standard Model extensions that match the measured values of gauge couplings and the Higgs, top, and bottom masses. We further detail the phenomenology of our models covering production, decay, fermion mixing, anomalous magnetic moments, effects from scalar mixing and chiral enhancement, and constraints on model parameters from data. Signatures at proton-proton and lepton colliders, such as lepton flavor violation and displaced vertices, and the prospect for electric dipole moments or charged lepton-flavor-violating type processes are also indicated.
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Publication status
- Published
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- Published version
Journal
Physical Review DISSN
2470-0010Publisher
American Physical SocietyExternal DOI
Issue
9Volume
102Page range
1-39Article number
a095023Pages
39.0Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2022-03-01First Open Access (FOA) Date
2022-03-01First Compliant Deposit (FCD) Date
2022-02-28Usage metrics
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