Modular $A_4$ symmetry in 3+1 active-sterile neutrino masses and mixings

Mayengbam Kishan Singh, S. Robertson Singh, N. Nimai Singh

Motivated by the significance of modular symmetry in generating neutrino masses and flavor mixings, we apply the modular $A_4$ symmetry in a 3+1 scheme of active-sterile neutrino m…