One-Zero Neutrino Textures and Resonant Type-II Leptogenesis: Flavor-Resolved Thermal Evolution and Baryon Asymmetry

Abstract

We investigate the viability of one-zero neutrino mass textures within the framework of resonant Type-II leptogenesis. Considering a two-triplet scalar realization of the Type-II seesaw mechanism, we analyze the compatibility between neutrino texture structures, CP asymmetry generation, and the observed baryon asymmetry of the Universe. We perform extensive numerical scans over the neutrino parameter space and classify the phenomenologically viable one-zero textures under both hierarchical and resonant leptogenesis scenarios. We show that several one-zero textures remain compatible with neutrino oscillation data while simultaneously generating sizable CP asymmetries through resonant enhancement. We further investigate the thermal evolution of the generated asymmetry using Boltzmann equations and demonstrate the freeze-out behavior of the baryon asymmetry. Extending the analysis to a flavor-resolved framework, we study the separate evolution of electron, muon, and tau asymmetries and show that flavor-dependent washout effects play a crucial role in determining the final baryon asymmetry. Our analysis establishes a direct connection between neutrino flavor textures, resonant thermal leptogenesis, and flavor-dependent baryogenesis dynamics.