Muon and electron g − 2 and lepton masses in flavor models

Abstract

Abstract The stringent experimental bound on μ → eγ is compatible with a simultaneous and sizable new physics contribution to the electron and muon anomalous magnetic moments (g − 2)ℓ (ℓ = e, μ), only if we assume a non-trivial flavor structure of the dipole operator coefficients. We propose a mechanism in which the realization of the (g − 2)ℓ correction is manifestly related to the mass generation through a flavor symmetry. A radiative flavon correction to the fermion mass gives a contribution to the anomalous magnetic moment. In this framework, we introduce a chiral enhancement from a non-trivial O $$ \mathcal{O} $$ (1) quartic coupling of the scalar potential. We show that the muon and electron anomalies can be simultaneously explained in a vast region of the parameter space with predicted vector-like mediators of masses as large as Mχ ∈ [0.6, 2.5] TeV.

Keywords

• Precision QED
• Beyond Standard Model
• Effective Field Theories
• Quark Masses and SM Parameters