Leptons and other forces of nature

Abstract

Assuming that neutrinos are not Majorana fermions and the right handed Dirac neutrino does not exist, we propose a model in which the second and the third generations of the leptons are composites, while the first generation is fundamental. The composite states are formed by the fundamental leptons and two new fundamental hidden scalar particles. In addition, there exist two hidden forces besides the SM interactions. The gauge symmetry SU(2)L ⊗U(1)Y ⊗U(1)h ⊗SU(2)h of the electroweak and the hidden forces breaks down to U(1)Y ⊗ U(1)h after the spontaneous symmetry breaking (SSB). We explain the neutrino masses in terms of the binding dynamics of a hidden force. The phenomenon of neutrino oscillation can also be explained by our model in a dynamical framework of the hidden forces.

The μ-τ mixed symmetry and neutrino mass matrix

“…The inability to generate these tiny neutrino masses is a limitation of the SM. One can propose new models [6] or go beyond the SM in order to put light on various neutrino mass generation mechanisms [7,8]. In the present work we emphasize on seesaw mechanisms viz., Type-I and Type-II that are widely used in the literature.…”