Mirror World and its Cosmological Consequences

Details Mirror World and its Cosmological Consequences Mirror World and its Cosmological Consequences

2003-12-23

arxiv.org/abs/hep-ph/0312335v1

Int.J.Mod.Phys. A19 (2004) 3775-3806

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1142/S0217751X04020075

We briefly review the concept of a parallel `mirror' world which has the same particle physics as the observable world and couples to the latter by gravity and perhaps other very weak forces. The nucleosynthesis bounds demand that the mirror world should have a smaller temperature than the ordinary one. By this reason its evolution should substantially deviate from the standard cosmology as far as the crucial epochs like baryogenesis, nucleosynthesis etc. are concerned. In particular, we show that in the context of certain baryogenesis scenarios, the baryon asymmetry in the mirror world should be larger than in the observable one. Moreover, we show that mirror baryons could naturally constitute the dominant dark matter component of the Universe, and discuss its cosmological implications.

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