Model building from asymptotic safety with Higgs and flavor portals

Hiller, Gudrun, Hormigos-Feliu, Clara, Litim, Daniel F and Steudtner, Tom (2020) Model building from asymptotic safety with Higgs and flavor portals. Physical Review D, 102 (9). a095023 1-39. ISSN 2470-0010

[img] PDF - Published Version
Available under License Creative Commons Attribution.

Download (3MB)


We 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.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 01 Mar 2022 08:18
Last Modified: 01 Mar 2022 08:30

View download statistics for this item

📧 Request an update