Neutrino Masses and Oscillations in Models with Large Extra Dimensions

TL;DR

This paper explores how large extra dimensions affect neutrino masses and oscillations, showing that right-handed neutrinos on branes lead to unique oscillation patterns and require a high string scale.

Contribution

It introduces a model with large extra dimensions where right-handed neutrinos on branes influence neutrino properties, differing from bulk neutrino models.

Findings

String scale must exceed 10^8 GeV for desired neutrino properties.

Lightest neutrino mass is zero in these models.

Neutrino oscillations involve sterile neutrinos with distinct characteristics.

Abstract

We discuss the profile of neutrino masses and mixings in models with large extra dimensions when right handed neutrinos are present in the branes along with the usual standard model particles. In these models, string scale must be bigger than $10^{8}$ GeV to have desired properties for the neutrinos at low energies. The lightest neutrino mass is zero and there is oscillations to sterile neutrinos that are different from other models with the bulk neutrino.