Underlying SU(3) Symmetry of the Standard Model of Electroweak Interactions

TL;DR

This paper proposes that the electroweak interactions of the Standard Model can be derived from an underlying SU(3) symmetry, unifying gauge bosons and explaining coupling properties and charge assignments.

Contribution

It introduces a novel SU(3) symmetry framework underlying the Standard Model's electroweak sector, linking gauge bosons, scalar fields, and charge quantization.

Findings

SU(3) symmetry yields four gauge bosons as gauge fields.

Predicts purely axial Z coupling to leptons with sinθ=1/2.

Supports Han-Nambu scheme for quark charges.

Abstract

The Standard Model for electroweak interactions derives four vector gauge boson from an SU(2)xU(1) symmetry. A doublet of complex scalar (Higgs) bosons is added to generate masses by spontaneous symmetry breaking. Both, the four vector bosons and four scalar bosons corresponding to the Higgs bosons of the Standard Model are shown to emerge as gauge bosons from an underlying SU(3) symmetry of electroweak lepton interactions. For the known leptons, the latter symmetry implies purely axial coupling of the Z boson to charged leptons, if the photon is required to have purely vector coupling. The corresponding Weinberg angle is determined by sin{\theta} = 1/2. The same SU(3) symmetry holds for quarks as well, if the observed fractional electric quark charges are averages of integer charges, according to the Han-Nambu scheme.