Flavor changing models with strictly massless neutrinos

TL;DR

This paper explores models where neutrinos change flavor through interactions without gaining mass, explaining neutrino oscillation phenomena without requiring neutrino mass or mixing.

Contribution

It introduces and discusses flavor-changing neutrino interaction models that do not involve neutrino mass, providing alternative explanations for neutrino oscillation data.

Findings

Models can explain solar neutrino deficit

Models account for atmospheric neutrino zenith-angle dependence

No neutrino mass or mixing needed in these models

Abstract

Theoretical models which present flavor changing neutrino interactions and simultaneously prevent this particle from acquiring any mass exist. We discuss some of them and their predictions for neutrino oscillations in matter which can account for the solar neutrino anomaly as well as the zenith-angle dependence of the deficit of atmospheric neutrinos observed by the SuperKamiokande experiment without invoking, therefore, neutrino masses nor mixing.