Spin precession in anisotropic cosmologies
General Relativity and Quantum Cosmology
2016-06-22 v3 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We consider the precession of a Dirac particle spin in some anisotropic Bianchi universes. This effect is present already in the Bianchi-I universe. We discuss in some detail the geodesics and the spin precession for both the Kasner and the Heckmann-Schucking solutions. In the Bianchi-IX universe the spin precession acquires the chaotic character due to the stochasticity of the oscillatory approach to the cosmological singularity. The related helicity flip of fermions in the very early Universe may produce the sterile particles contributing to dark matter.
Keywords
Cite
@article{arxiv.1510.08253,
title = {Spin precession in anisotropic cosmologies},
author = {A. Yu. Kamenshchik and O. V. Teryaev},
journal= {arXiv preprint arXiv:1510.08253},
year = {2016}
}
Comments
15 pages, 1 figure