Leptons and other forces of Nature

TL;DR

This paper proposes a model where the second and third lepton generations are composite particles formed by fundamental leptons and hidden scalars, with hidden forces explaining neutrino masses and oscillations.

Contribution

It introduces a novel composite lepton model with hidden forces, providing a dynamical explanation for neutrino masses and oscillations.

Findings

Neutrino masses explained via hidden force dynamics

Neutrino oscillations accounted for in the model

Second and third generations are composite, first is fundamental

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 $SU(2)_L\otimes U(1)_{Y}\otimes U(1)_h\otimes SU(2)_h$ of the electroweak and the hidden forces breaks down to $U(1)_{Y}\otimes U(1)_h$ 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