Electron and muon anomalous magnetic dipole moment in a 3–3–1 model

Abstract

We calculate, in the context of a 3-3-1 model with heavy charged leptons, constraints on some parameters of the extra particles in the model by imposing that their contributions to both the electron and muon (g − 2) factors are in agreement with experimental data up to 1σ-3σ. In order to obtain realistic results we use some of the possible solutions of the left-and right-unitary matrices that diagonalize the lepton mass matrices, giving the observed lepton masses and at the same time allowing to accommodate the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) mixing matrix. We show that, at least up to 1-loop order, in the particular range of the space parameter that we have explored, it is not possible to fit the observed electron and muon (g − 2) factors at the same time unless one of the extra leptons has a mass of the order of 20-40 GeVs and the energy scale of the 331 symmetry to be of around 60-80 TeVs.

Dirac neutrinos in an SU(2) left-right symmetric model

“…In order to fit the muon and electron g − 2 anomalies [49] we need m S ≳ 4.318 TeV and m A ≳ 4.321 TeV [50]. However, lower masses are allowed if we consider the contributions of all scalar and pseudoscalars in the model.…”

Copositivity criteria, scalar mass eigenstates, and custodial symmetry parameter $Δρ$ for the $S_3 \otimes \mathbb{Z}_2$ model

“…Therefore, it seems wise to leave these as they are until other phenomenological studies bring different constraints on the model parameters, which can give us a direction to follow among the many possibilities here presented. Some possible phenomenological studies are: the electron and muon anomalous magnetic dipole moments [14], the neutron electric dipole moment [15,16], and Flavor-Changing Neutral Currents [17]. All these observables are well suited for studies in multi-Higgs models.…”

Vectorlike leptons and inert scalar triplet: Lepton flavor violation, g−2 , and collider searches

“…It has been recently shown that none of these models are capable of accommodating the g − 2 anomaly due to the existence of stringent collider bounds (see [87][88][89][90][91] for g − 2 studies in the context of 3-3-1 models). The masses of the gauge bosons are proportional to the energy scale at which SUð3Þ L × Uð1Þ N → SUð2Þ L × Uð1Þ Y .…”