Mirror dark matter: Cosmology, galaxy structure and direct detection
Abstract
A simple way to accommodate dark matter is to postulate the existence of a hidden sector. That is, a set of new particles and forces interacting with the known particles predominantly via gravity. In general, this leads to a large set of unknown parameters, however, if the hidden sector is an exact copy of the standard model sector, then, an enhanced symmetry arises. This symmetry, which can be interpreted as spacetime parity, connects each ordinary particle (e, ν, p, n, γ, …) with a mirror partner (e′, ν′, p′, n′, γ′, …). If this symmetry is completely unbroken, then the mirror particles are degenerate with their ordinary particle counterparts, and would interact amongst themselves with exactly the same dynamics that govern ordinary particle interactions. The only new interaction postulated is photonmirror photon kinetic mixing, whose strength ∊, is the sole new fundamental (Lagrangian) parameter relevant for astrophysics and cosmology. It turns out that such a theory, with suitably chosen initial conditions effective in the very early universe, can provide an adequate description of dark matter phenomena provided that ∊ 10^{9}. This review focusses on three main developments of this mirror dark matter theory during the last decade: early universe cosmology, galaxy structure and the application to direct detection experiments.
 Publication:

International Journal of Modern Physics A
 Pub Date:
 April 2014
 DOI:
 10.1142/S0217751X14300130
 arXiv:
 arXiv:1401.3965
 Bibcode:
 2014IJMPA..2930013F
 Keywords:

 Dark matter;
 mirror matter;
 hidden sector;
 12.35.+d;
 Astrophysics  Cosmology and Nongalactic Astrophysics;
 High Energy Physics  Phenomenology
 EPrint:
 130 pages