Einstein-Yang-Mills-aether theory with nonlinear axion field: Decay of color aether and the axionic dark matter production

TL;DR

This paper develops a nonlinear SU(N) symmetric theory linking gravitational, gauge, vector, and axion fields, explaining how decaying color aether in the early Universe could produce axionic dark matter with potentially large abundance.

Contribution

It introduces a nonlinear SU(N) symmetric model incorporating discrete symmetry and axion dynamics, explaining dark matter production via color aether decay.

Findings

Color aether decay transfers energy to axion field.

Axion field can grow arbitrarily large in the model.

Model explains the abundance of axionic dark matter.

Abstract

We establish a nonlinear version of the SU(N) symmetric theory, which describes self-consistently the interaction between the gravitational, gauge, vector and pseudoscalar (axion) fields. In the context of this theory the SU(N) symmetric multiplet of vector fields is associated with the color aether, the decay of which in the early Universe produced the canonic dynamic aether and the axionic dark matter. The SU(N) symmetric Yang-Mills field, associated with the color aether, forms the source, which transfers the energy of the decaying color aether to the axion field. The nonlinear modification of the model uses explicitly the requirement of discrete symmetry, prescribed by the axion field, and is based on the analogy with nonlinear physical pendulum. We show that in the framework of this nonlinear regular model the axion field can grow to an arbitrarily large value, thus explaining the abundance of the axionic dark matter in the Universe.