Space-time evolution induced by spinor fields with canonical and non-canonical kinetic terms

TL;DR

This paper investigates how spinor fields with different kinetic terms influence the evolution of the universe's expansion, including acceleration and deceleration phases, within a cosmological model.

Contribution

It introduces a framework for analyzing spinor fields with canonical and non-canonical kinetic terms as drivers of cosmic evolution, incorporating dynamical symmetry breaking.

Findings

Spinor fields can induce both acceleration and deceleration in universe expansion.

The deceleration parameter is derived from combined solutions of equations of motion and Friedmann equations.

Dynamical symmetry breaking contributes to realistic cosmological models.

Abstract

We study spinor field theories as an origin to induce space-time evolution. Self-interacting spinor fields with canonical and non-canonical kinetic terms are considered in a Friedman-Robertson-Walker universe. The deceleration parameter is calculated by solving the equation of motion and the Friedman equation, simultaneously. It is shown that the spinor fields can accelerate and decelerate the universe expansion. To construct realistic models we discuss the contributions from the dynamical symmetry breaking.