Supersymmetric Models for Neutrino Mass

TL;DR

This paper reviews supersymmetric models for neutrino mass, focusing on R-parity violation, which explains neutrino oscillations and predicts observable collider signatures, including invisible Higgs decays due to the majoron.

Contribution

It introduces a predictive supersymmetric model with explicit bilinear R-parity violation that accounts for neutrino data and discusses its spontaneous R-parity breaking extension with distinctive collider signatures.

Findings

Model explains atmospheric and solar neutrino anomalies.

R-parity violation effects are observable at colliders.

Spontaneous R-parity breaking introduces a majoron affecting Higgs decays.

Abstract

We review models for neutrino mass, with special emphasis in supersymmetric models where R-parity is broken either explicitly or spontaneously. The simplest unified extension of the MSSM with explicit bilinear R-parity violation provides a predictive scheme for neutrino masses and mixings which can account for the observed atmospheric and solar neutrino anomalies. Despite the smallness of neutrino masses R-parity violation is observable at present and future high-energy colliders, providing an unambiguous cross-check of the model. This model can be shown to be an effective model for the, more theoretically satisfying, spontaneous broken theory. The main difference in this last case is the appearance of a massless particle, the majoron, that can modify the decay modes of the Higgs boson, making it decay invisibly most of the time.