One-loop contribution to the neutrino mass matrix in NMSSM with right-handed neutrinos and tri-bimaximal mixing

TL;DR

This paper investigates how one-loop quantum corrections affect neutrino masses in the NMSSM framework with right-handed neutrinos, highlighting the interplay between tree-level and loop-level contributions in achieving tri-bimaximal mixing.

Contribution

It introduces a detailed analysis of one-loop corrections to neutrino masses in NMSSM with right-handed neutrinos, emphasizing the conditions where loop effects are significant.

Findings

One-loop contributions can be comparable to tree-level masses.

Neutrino masses are generated via a TeV-scale seesaw mechanism.

Tri-bimaximal mixing pattern is consistent with both tree and loop contributions.

Abstract

Neutrino mass patterns and mixing have been studied in the context of next-to-minimal supersymmetric standard model (NMSSM) with three gauge singlet neutrino superfields. We consider the case with the assumption of R-parity conservation. The vacuum expectation value of the singlet scalar field $S$ of NMSSM induces the Majorana masses for the right-handed neutrinos as well as the usual $\mu$-term. The contributions to the light neutrino mass matrix at the tree level as well as one-loop level are considered, consistent with the tri-bimaximal pattern of neutrino mixing. Light neutrino masses arise at the tree level through a TeV scale seesaw mechanism involving the right-handed neutrinos. Although all the three light neutrinos acquire non-zero masses at the tree-level, we show that the one-loop contributions can be comparable in size under certain conditions.