SYMMETRY REALIZATION UNDER (5+4) SCHEME IN THE CONTEXT OF MINIMAL EXTENDED SEESAW MECHANISM

Abstract

This work includes the Abelian group symmetry realization of two-zero textures of neutrino mass matrices ( ) under Minimal Extended Seesaw (MES) Mechanism. MES is an extension of type-I seesaw mechanism which incorporates an additional scalar singlet field ‘S’ apart from the three right-handed neutrinos. MES mechanism deals with  form of Dirac neutrino mass matrix  and right-handed Majorana neutrino mass matrix , along with  form of  which couples the right-handed neutrinos and the singlet scalar ‘S’. In this work, we present the  cyclic group symmetry realization of those textures of ,  and   which are viable in realizing the two-zero textures of  under MES mechanism. In doing so, the Standard Model is extended to include few  scalar doublets to realize the zero textures of , scalar singlet  to realize  and few scalar singlets  to realize