Neutrino Mass and Leptogenesis in the Non-SUSY Modular $A^\prime_5$ Inverse Seesaw

TL;DR

This paper introduces a non-supersymmetric inverse seesaw model utilizing $A^{"}_5$ modular symmetry to explain neutrino properties and baryon asymmetry, with testable predictions for experiments and colliders.

Contribution

It presents a novel $A^{"}_5$ modular symmetry-based inverse seesaw model that unifies neutrino mass generation and leptogenesis in a non-SUSY framework.

Findings

Compatible with current neutrino oscillation data within 3σ

Predicts neutrino mass ordering and CP-violating phases

Achieves TeV-scale leptogenesis consistent with baryon asymmetry

Abstract

A non-supersymmetric inverse seesaw model of neutrino mass based on the $A^{\prime}_5$ modular symmetry is presented. This framework provides a combined explanation for neutrino masses, mixing, and the cosmic baryon asymmetry through leptogenesis. Three concrete realisations are constructed, and their phenomenological predictions are analysed. The results are not only compatible with the measured neutrino oscillation parameters within the current experimental 3$\sigma$ ranges, but also provide predictions for the neutrino mass ordering, Dirac and Majorana CP-violating phases, and the effective Majorana mass in neutrinoless double beta decay. The model further realises TeV-scale leptogenesis consistent with the observed baryon asymmetry, rendering the scenario testable in both low-energy neutrino experiments and high-energy collider searches.