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

Abstract

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

Comments: 15 pages, 5 figures