Charge Quantization and Neutrino Mass from Planck-scale SUSY

TL;DR

This paper proposes a model where charge quantization of Standard Model particles arises from a global symmetry and supersymmetry, linking neutrino masses to Planck-scale physics and anomaly mediation effects.

Contribution

It introduces a minimal model connecting charge quantization, neutrino masses, and Planck-scale SUSY, with novel predictions for neutrino mass scales and millicharged particles.

Findings

Charge quantization via anomaly cancellation in a SUSY framework.

Neutrino masses predicted to be around oscillation scales.

Existence of millicharged particles without hidden photons.

Abstract

We show a possibility for the charge quantization of the standard model (SM) particles. If a global symmetry makes the three copies of a generation and supersymmetry (SUSY) relates the Higgs boson to a lepton, all the charges of the SM particles can be quantized through gauge-anomaly cancellation. In the minimal model realizing the possibility, the gravitino mass around the Planck-scale is needed to generate the SM couplings through (quantum) supergravity. Much below the Planck-scale, the SM is obtained as the effective theory. Interestingly, if the gaugino masses are generated through anomaly mediation, one of the neutrino masses is predicted to be around the neutrino oscillation scales. In an extension of the model, millicharged particles can exist without introducing massless hidden photons.