The evolution of neutrino masses and mixings in the 5D MSSM

TL;DR

This paper investigates how neutrino masses, mixing angles, and phases evolve in a five-dimensional MSSM framework, considering different compactification scenarios and their implications for leptonic CP violation.

Contribution

It introduces a detailed analysis of neutrino parameter evolution in 5D MSSM, including bulk and brane matter field scenarios, highlighting potential large CP violation effects.

Findings

Large variation in Dirac phase possible

Models predicting maximal CP violation are promising

Evolution depends on compactification radius and matter field localization

Abstract

We consider a five-dimensional Minimal Supersymmetric Standard Model compactified on a S1/Z2 orbifold, and study the evolution of neutrino masses, mixing angles and phases for different values of tan beta and different radii of compactification. We consider the usual four dimensional Minimal Supersymmetric Standard Model limit plus two extra-dimensional scenarios: where all matter superfields can propagate in the bulk, and where they are constrained to the brane. We discuss in both cases the evolution of the mass spectrum, the implications for the mixing angles and the phases. We find that a large variation for the Dirac phase is possible, which makes models predicting maximal leptonic CP violation especially appealing.