Neutrino mass induced radiatively by supersymmetric leptoquarks

TL;DR

This paper proposes a model where supersymmetric leptoquarks induce Majorana neutrino masses radiatively at one-loop level, linking neutrino mass differences to quark mass matrices and explaining neutrino oscillation data.

Contribution

It introduces a novel extension of the MSSM with leptoquark multiplets that generate neutrino masses without violating R-parity, connecting neutrino and quark mass hierarchies.

Findings

Neutrino masses are generated radiatively at one-loop level.

The neutrino mass-squared splitting ratio matches observed neutrino oscillation data.

The model naturally explains the hierarchy of neutrino mass differences.

Abstract

We show how nonzero Majorana neutrino masses can be radiatively generated by extending the MSSM with leptoquark chiral multiplets without violating R-parity. It is found that, with these particles, the R-parity conservation does not imply lepton number conservation. Neutrino masses generated at a one-loop level are closely related to the down quark mass matrix. The ratio of neutrino mass-squared splittings $\Delta m^2_{\nu_2-\nu_1}/\Delta m^2_{\nu_3-\nu_2}$ obtained is naturally close to $\Delta m^2_{s-d}/\Delta m^2_{b-s}\sim 10^{-3}$ which is in the right region required to explain both the atmospheric neutrino data and the MSW solutions for the solar neutrino data.