Radiative contribution to neutrino masses and mixing in $\mu\nu$SSM

TL;DR

This paper investigates how one-loop quantum corrections influence neutrino masses and mixing in the $$SSM, demonstrating compatibility with experimental data and favoring a normal hierarchy.

Contribution

It provides a detailed analysis of one-loop effects on neutrino masses in the $$SSM, showing improved alignment with observed neutrino oscillation data.

Findings

One-loop corrections help fit experimental neutrino data.

Normal hierarchy is more easily accommodated than inverted or degenerate.

The model remains consistent with current neutrino measurements.

Abstract

In an extension of the minimal supersymmetric standard model (popularly known as the $\mu\nu$SSM), three right handed neutrino superfields are introduced to solve the $\mu$-problem and to accommodate the non-vanishing neutrino masses and mixing. Neutrino masses at the tree level are generated through $R-$parity violation and seesaw mechanism. We have analyzed the full effect of one-loop contributions to the neutrino mass matrix. We show that the current three flavour global neutrino data can be accommodated in the $\mu\nu$SSM, for both the tree level and one-loop corrected analyses. We find that it is relatively easier to accommodate the normal hierarchical mass pattern compared to the inverted hierarchical or quasi-degenerate case, when one-loop corrections are included.