Neutrino mass generation with large SU(2)L multiplets under local U(1)Lμ−Lτ symmetry

We propose a model of neutrino mass matrix with large SU(2) multiplets and gauged U(1)Lμ−Lτ symmetry, in which we introduce SU(2) quartet scalar and quintet fermions with nonzero Lμ−Lτ charge. Then we investigate the neutrino mass structure and explore phenomenologies of large multiplet fields at the collider, particularly, focusing on doubly- and singly- charged exotic leptons from the quintet.