Mirror World and Superstring-Inspired Hidden Sector of the Universe, Dark Matter and Dark Energy

TL;DR

This paper proposes a cosmological model with a hidden superstring-inspired sector, explaining dark energy, dark matter, and baryogenesis through a new symmetry group and its associated particles, within a parallel universe framework.

Contribution

It introduces a novel hidden sector based on superstring-inspired symmetry breaking, linking it to dark energy and matter, and provides a comprehensive cosmological evolution scenario.

Findings

The hidden sector includes a new SU(2)'_ heta group responsible for dark energy.

The model accounts for baryogenesis and the origin of dark matter and energy.

It offers a unified cosmological scenario consistent with known epochs.

Abstract

We develop a concept of parallel existence of the ordinary (O) and hidden (H) worlds. We compare two cases: 1) when the hidden sector of the Universe is a mirror counterpart of the ordinary world, and 2) when it is a superstring-inspired shadow world described, in contrast to the mirror world, by a symmetry group (or by a chain of groups), which does not coincide with the ordinary world symmetry group. We construct a cosmological model assuming the existence of the superstring-inspired E_6 unification, broken at the early stage of the Universe to SO(10)\times U(1)_Z - in the O-world, and to SU(6)'\times SU(2)'_\theta - in the H-world. As a result, we obtain the low energy symmetry group G'_SM\times SU(2)'_\theta in the shadow world, instead of the Standard Model group G_SM existing in the O-world. The additional non-Abelian SU(2)'_\theta group with massless gauge fields, "thetons", is responsible for dark energy. Considering a quintessence model of cosmology with an inflaton \sigma and an axion a_\theta, which is a pseudo Nambu-Goldstone boson induced by the SU(2)'_\theta-group anomaly, we explain the origin of Dark Energy, Dark Matter and Ordinary Matter. In the present model we review all cosmological epochs (inflation, reheating, recombination and nucleosynthesis), and give our version of the baryogenesis. The cosmological constant problem is also briefly discussed.