One colorful resolution to the neutrino mass generation, three lepton flavor universality anomalies, and the Cabibbo angle anomaly

We propose a simple model to simultaneously explain four observed flavor anomalies while generating the neutrino mass at the one-loop level. Specifically, we address the measured anomalous magnetic dipole moments of the muon, Delta a(mu), and electron, Delta a(e), the observed anomaly of b -> sl(+) l(-) in the B-meson decays, and the Cabibbo-angle anomaly. The model consists of four colorful new degrees of freedom: three scalar leptoquarks with the Standard Model quantum numbers (3, 3, -1/3), (3, 2, 1/6), and (3, 1, 2/3), and one pair of down-quark-like vector fermion in (3, 1, -1/3). The baryon number is assumed to be conserved for simplicity. Phenomenologically viable solutions with the minimal number of real parameters can be found to accommodate all the above-mentioned anomalies and produce the approximate, close to 1 sigma, neutrino oscillation pattern at the same time. From general consideration, the model robustly predicts: (1) neutrino mass is of the normal hierarchy type, and (2) M-ee(nu) less than or similar to 3 x 10(-4) MeV. The possible UV origin to explain the flavor pattern of the found viable parameter space is briefly discussed. The parameter space can be well reproduced within a simple split fermion toy model.

Automated summary

The proposed model aims to explain various flavor anomalies and generate neutrino mass at the one-loop level using four colorful new degrees of freedom. By conserving baryon number and finding solutions with minimal parameters, the model can accommodate anomalies and predict properties like normal hierarchy type neutrino mass and specific bounds on M-ee(nu). The possible UV origin for the discovered viable parameter space is briefly discussed and the parameter space can be reproduced within a simple split fermion toy model.