General Structure of Democratic Mass Matrix of Lepton Sector in E 6 Model

An extension of the Standard Model (SM) fermion sector, which is inspired by the E-6 grand unified theory model, may be a good candidate to explain a number of unanswered questions in SM. Existence of the E-6 leptons may explain great mass difference of charged and neutral leptons. Also, democracy on mass matrix elements is a natural approach in SM. In this study, we have given general structure of democratic mass matrix of lepton sector in E-6 model.