A theory of the dark matter

TL;DR

This paper proposes a symmetric semi-classical initial condition within the Standard Model that predicts the universe's evolution without dark matter, inflation, or beyond Standard Model physics, identifying the cosmological gauge field as dark matter.

Contribution

It introduces a novel initial condition that fully determines cosmology, with the cosmological gauge field acting as dark matter, eliminating the need for inflation or new physics beyond the Standard Model.

Findings

The cosmological gauge field evolves as a non-relativistic fluid.

Dark matter is explained as a classical Standard Model phenomenon.

The model predicts a flat universe with dark matter and dark energy components.

Abstract

In an earlier paper I proposed a highly symmetric semi-classical initial condition to describe the universe in the period leading up to the electroweak transition and completely determine all cosmology after that. Nothing beyond the Standard Model is assumed. Inflation is not needed. The initial symmetry allows no adjustable parameters. It is a complete theory of the Standard Model cosmological epoch, predictive and falsifiable. Here, the time evolution of the initial condition is calculated in the classical approximation. The fields with nontrivial classical values are the SU(2)-weak gauge field (the cosmological gauge field or CGF) and the Higgs field. The CGF produces the electroweak transition then evolves as a non-relativistic perfect fluid ($w_{\mathrm{CGF}}\approx 0$). At the present time, i.e. when $H=H_{0}$, the CGF energy density satisfies $\Omega_{\Lambda}+\Omega_{\mathrm{CGF}}=1$. The CGF is the dark matter. The dark matter is a classical phenomenon of the Standard Model. The classsical universe contains only the dark matter, no ordinary matter. At next to leading order the fluctuations of the Standard Model fields will provide a calculable, relatively small amount of ordinary matter such that $\Omega_{\Lambda}+\Omega_{\mathrm{CGF}}+\Omega_{\mathrm{ordinary}}=1$.