Anomalous magnetic moments from asymptotic safety

The measurements of the muon and electron anomalous magnetic moments hint at physics beyond the standard model. We show why and how models inspired by asymptotic safety can explain deviations from standard model predictions naturally. Our setup features an enlarged scalar sector and Yukawa couplings...

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Bibliographic Details
Published in:Physical review. D 2020-10, Vol.102 (7), p.071901-1
Main Authors: Hiller, Gudrun, Hormigos-Feliu, Clara, Litim, Daniel F, Steudtner, Tom
Format: Article
Language:English
Subjects:
Anomalies
Asymptotic methods
Asymptotic properties
Couplings
Electrons
Fermions
Leptons
Magnetic moments
Magnetism
Muons
Safety
Standard model (particle physics)
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Summary:The measurements of the muon and electron anomalous magnetic moments hint at physics beyond the standard model. We show why and how models inspired by asymptotic safety can explain deviations from standard model predictions naturally. Our setup features an enlarged scalar sector and Yukawa couplings between leptons and new vectorlike fermions. Using the complete two-loop running of couplings, we observe a well-behaved high-energy limit of models including a stabilization of the Higgs. We find that a manifest breaking of lepton universality beyond standard model Yukawas is not necessary to explain the muon and electron anomalies. We further predict the tau anomalous magnetic moment and new particles in the TeV energy range, whose signatures at colliders are indicated. With small CP phases, the electron EDM can be as large as the present bound.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.102.071901