Survey of texture zeros with light Dirac neutrinos

Abstract We classify all possible texture zeros in a light neutrino mass matrix diagonal charged lepton basis by considering the Dirac nature of neutrinos. For Hermitian matrix, number remain same as Majorana zeros, but with less free parameters due to absence additional CP phases. Relaxing leads many more possibilities and freedom phases, mixing angles not constrained data. While we find only very few one-zero two-zero textures case be allowed, non-Hermitian some even four are allowed. most one-zero, three-zero this four-zero tightly six allowed out 126 possibilities. The also give interesting correlations between sharp distinctions normal inverted ordering. Many these saturate Planck 2018 upper bound on sum absolute masses.