Softly broken $\mu \leftrightarrow \tau$ symmetry in the minimal see-saw model

Juan Carlos Gómez-Izquierdo, Abdel Pérez-Lorenzana

Neutrino oscillations data indicates that neutrino mixings are consistent with an apparent ${\nu }_{\mu }-{\nu }_{\tau }$ exchange symmetry in neutrino mass matrix. We observe that in the mininimally…