Leptogenesis implications of two-zero textures of Majorana neutrino mass matrix in type-I seesaw model

TL;DR

This paper explores how specific two-zero textures of the Majorana neutrino mass matrix in the type-I seesaw model influence leptogenesis, revealing strong correlations with neutrino parameters and implications for baryon asymmetry.

Contribution

It systematically analyzes the compatibility of two-zero textures of $M_R$ with leptogenesis, considering both general and specific Dirac mass matrices, providing new insights into neutrino physics and baryogenesis.

Findings

Two-zero textures of $M_R$ strongly correlate with neutrino parameters.

Certain textures are compatible with successful leptogenesis.

Distinct phenomenological implications for neutrino flavor physics.

Abstract

The type-I seesaw model with two-zero textures of the Majorana mass matrix for the right-handed neutrinos $M^{}_{\rm R}$ provides a highly predictive framework for neutrino mass generation and baryon asymmetry of the Universe via leptogenesis. In this work, we systematically investigate the compatibility of viable two-zero textures of $M^{}_{\rm R}$ with leptogenesis within the type-I seesaw scenario. We consider both a general diagonal Dirac neutrino mass matrix $M^{}_{\rm D}$ and two theoretically motivated special cases, namely the SO(10) GUT-inspired $M^{}_{\rm D} \sim \mathrm{diag}(m_u,m_c,m_t)$ and the flavor symmetry-induced $M^{}_{\rm D} \propto I$. Our study shows that two-zero textures of $M^{}_{\rm R}$ yield strong correlations between neutrino parameters and leptogenesis, offering distinctive phenomenological implications for neutrino flavor physics and baryon asymmetry of the Universe.