Signatures of Extra Dimensional Sterile Neutrinos

TL;DR

This paper explores how sterile neutrinos arising from extra dimensions could explain neutrino anomalies and dark matter, analyzing their effects on oscillation experiments and beta decay spectra.

Contribution

It introduces a model with sterile neutrinos from extra dimensions and investigates their experimental signatures in oscillation and beta decay data.

Findings

Sterile neutrinos can explain short-baseline anomalies.

Kaluza-Klein tower impacts oscillation patterns.

Potential signals in KATRIN-like beta decay experiments.

Abstract

We study a large extra dimension model with active and sterile Dirac neutrinos. The sterile neutrino masses stem from compactification of an extra dimension with radius $R$ and are chosen to have masses around eV or keV, in order to explain short-baseline anomalies or act as warm dark matter candidates. We study the effect of the sterile neutrino Kaluza-Klein tower in short-baseline oscillation experiments and in the beta spectrum as measurable by KATRIN-like experiments.