Model Building from Asymptotic Safety with Higgs and Flavor Portals

Abstract

We perform a comprehensive search for Standard Model extensions inspired by asymptotic safety. Our models feature a singlet matrix scalar field, three generations of vector-like 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 BSM 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 which 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.

40 pages, 23 figures, 11 tables

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Cited by in corpus (32)

• Multi-lepton signatures of vector-like leptons with flavor
• Minimal models for $g-2$ and dark matter confront asymptotic safety
• Review of searches for vector-like quarks, vector-like leptons, and heavy neutral leptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV at the CMS experiment
• Muon $g-2$ in two Higgs doublet models with vectorlike leptons
• Inclusive nonresonant multilepton probes of new phenomena at $\sqrt{s}=$ 13 TeV
• Fermion mass hierarchies from vector-like families with an extended 2HDM and a possible explanation for the electron and muon anomalous magnetic moments
• Portals into Higgs vacuum stability
• Leptophilic fermion WIMP ~ Role of future lepton colliders
• Non-local Non-Abelian Gauge Theory: Conformal Invariance and $\beta$-function
• Asymptotic safety and gauged baryon number
• Universal Inverse seesaw mechanism as a source of the SM fermion mass hierarchy
• Asymptotically safe dark matter with gauged baryon number
• Explanation of electron and muon $g-2$ anomalies in AMSB
• Perturbative Asymptotic Safety and Its Phenomenological Applications
• Probing New Physics in the Vector-like Lepton Model by Lepton Electric Dipole Moments
• An asymptotically safe SU(5) GUT
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• Fermion mass hierarchy and g-2 anomalies in an extended 3HDM Model
• Asymptotic safety in the Litim-Sannino model at four loops
• Search for vector-like leptons coupling to first- and second-generation Standard Model leptons in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• A compact frozen-spin trap for the search for the electric dipole moment of the muon
• Scale symmetry breaking and generation of mass at quantum critical points
• Same-Sign Taus Signatures of Maximally Flavor-Violating Scalars at the LHC
• Collider imprint of vector-like leptons in light of anomalous magnetic moment and neutrino data
• ARGES -- Advanced Renormalisation Group Equation Simplifier
• B-Anomalies from flavorful U(1)' extensions, safely
• Deep Learning Searches for Vector-Like Leptons at the LHC and Electron/Muon Colliders
• Excess of Tau events at SND@LHC, FASER$\nu$ and FASER$\nu$2
• Can electron and muon $g-2$ anomalies be jointly explained in SUSY?
• Explaining lepton-flavor non-universality and self-interacting dark matter with $L_{\mu }-L_{\tau }$
• Conformal Windows beyond Asymptotic Freedom
• Asymptotic safety guaranteed for strongly coupled gauge theories