Cobimaximal mixing pattern from a $\Delta(27)$ inverse seesaw model

TL;DR

This paper proposes a $ abla(27)$ symmetry-based inverse seesaw model that explains neutrino mixing patterns and baryon asymmetry, emphasizing the normal hierarchy scenario.

Contribution

It introduces a novel $ abla(27)$ inverse seesaw framework with specific symmetry breaking to achieve cobimaximal mixing and successful leptogenesis.

Findings

Achieves viable leptonic mixing angles consistent with cobimaximal pattern.

Successfully explains baryon asymmetry via leptogenesis in the normal hierarchy.

Provides a new symmetry-based approach to neutrino mass and mixing modeling.

Abstract

We present an inverse seesaw model based on the $\Delta(27)$ symmetry and Abelian discrete symmetries, which account for the mass hierarchies and, through a specific pattern of symmetry breaking, leads to viable leptonic mixing angles according to the cobimaximal mixing pattern. In the model, leptogenesis successfully accounts for the observed baryon asymmetry of the Universe for a large range of the parameter space, only for the scenario of normal neutrino mass hierarchy.