A Weyl-Dirac Cosmological Model with DM and DE

TL;DR

This paper proposes a cosmological model within the Weyl-Dirac framework where Weylian microstructure generates dark matter and dark energy, explaining cosmic evolution and acceleration through geometric fields and bosons called weylons.

Contribution

It introduces a Weyl-Dirac cosmological model where dark matter and dark energy arise from geometric fields, providing a unified geometric explanation for cosmic phenomena.

Findings

Weylons as dark matter candidates

Dark energy driven by Dirac's gauge function

Oscillatory universe with specific initial and current scales

Abstract

In the Weyl-Dirac (W-D) framework a spatially closed cosmological model is considered. It is assumed that the space-time of the universe has a chaotic Weylian microstructure but is described on a large scale by Riemannian geometry. Locally fields of the Weyl connection vector act as creators of massive bosons having spin 1. It is suggested that these bosons, called weylons, provide most of the dark matter in the universe. At the beginning the universe is a spherically symmetric geometric entity without matter. Primary matter is created by Dirac's gauge function very close to the beginning. In the early epoch, when the temperature of the universe achieves its maximum, chaotically oriented Weyl vector fields being localized in micro-cells create weylons. In the dust dominated period Dirac's gauge function is giving rise to dark energy, the latter causing the cosmic acceleration at present. This oscillatory universe has an initial radius identical to the Plank length = 1.616 exp (-33) cm, at present the cosmic scale factor is 3.21 exp (28) cm, while its maximum value is 8.54 exp (28) cm. All forms of matter are created by geometrically based functions of the W-D theory.