Positive-energy Dirac particles in cosmology

TL;DR

This paper explores the behavior of positive-energy Dirac particles within flat cosmological models, proposing their potential role as dark matter candidates and discussing implications for cosmic anisotropy.

Contribution

It provides a relativistic framework for Dirac particles in cosmology and suggests their relevance to dark matter and cosmic anisotropy.

Findings

Dirac particles can be modeled in flat FRW cosmology

Potential connection between Dirac particles and dark matter

Implications for cosmic anisotropy generation

Abstract

We provide general relativistic treatment of the single-component field described by Dirac's positive-energy wave equation of 1971. It is motivated by Bogomolny's proposal to regard that field as a possible candidate for dark matter. Our emphasis is on standard (flat) Friedmann-Robertson-Walker cosmology. The early universe is not considered, though there is a strong indication that the field may play a role in internally driven generation of cosmic anisotropy.