Principles for a unified picture of fermions

TL;DR

This paper proposes a chiral SU(2) model where spontaneous Lorentz symmetry breaking leads to a unified fermion picture, describing leptons and quarks as excitations and interactions via Nambu-Goldstone bosons, potentially simplifying the standard theory.

Contribution

It introduces a novel chiral SU(2) framework that unifies fermions and explains interactions through spontaneous symmetry breaking and Nambu-Goldstone bosons, offering a new conceptual foundation.

Findings

Lorentz symmetry can be spontaneously broken at the Lagrangian level.

Leptons and quarks can be described as quasi-excitations within this model.

The model provides an alternative explanation for baryon and lepton asymmetries.

Abstract

It is shown that a chiral SU(2) model can break Lorentz symmetry spontaneously at the Lagrangian level when gauge bosons become massive. This model seems to propose the principles and conceptual foundations leading to a unified picture of fermions, and may reduce the standard theory to a far simpler form. The model suggests describing leptons and quarks as quasi-excitations, while electromagnetic and strong interactions as secondary interactions mediated by Nambu-Goldstone bosons originating from spontaneous violations of global SU(2) and rotational symmetries. Both the possibility of observing Lorentz-violating phenomena and their magnitudes are discussed. The model also provides an alternative scenario for baryon and lepton asymmetries of the Universe.