Muon and electron g − 2 and lepton masses in flavor models
Lorenzo Calibbi, M. L. López-Ibáñez, Aurora Melis, Oscar Vives · Journal of High Energy Physics · 2020
A bstract The stringent experimental bound on μ → e γ 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 $$ \mathcal{O} $$ 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.