Neutrino phenomenology of a high scale supersymmetry model

TL;DR

This paper explores neutrino properties and CP violation within a high scale supersymmetry framework, highlighting the role of sneutrino VEVs and heavy triplets in generating neutrino masses and CP effects.

Contribution

It introduces a model where heavy triplets and sneutrino VEVs contribute to neutrino masses and CP violation, providing a natural explanation for mass degeneracy and ordering.

Findings

Neutrino masses are approximately 0.020, 0.022, and 0.054 eV.

Large CP violation in neutrino oscillations is predicted.

Effective Majorana mass of electron neutrino is about 0.02 eV.

Abstract

CP violation in the lepton sector, and other aspects of neutrino physics, are studied within a high scale supersymmetry model. In addition to the sneutrino vacuum expectation values (VEVs), the heavy vector-like triplet also contributes to neutrino masses. Phases of the VEVs of relevant fields, complex couplings and Zino mass are considered. The approximate degeneracy of neutrino masses $m_{\nu_1}$ and $m_{\nu_2}$ can be naturally understood. The neutrino masses are then normal ordered, $\sim$ 0.020 eV, 0.022 eV, and 0.054 eV. Large CP violation in neutrino oscillations is favored. The effective Majorana mass of the electron neutrino is about 0.02 eV.