4 years ago

Reconstruction of Cosmological Evolution in the Presence of Extra Dimensions.

Stelios Karydas, B. C. Georgalas, Eleftherios Papantonopoulos

The model of Physics resulting from a Kaluza-Klein dimensional reduction procedure offers very good dark matter candidates in the form of Light Kaluza-Klein Particles, and thus becomes relevant to Cosmology. In this work we recover a late-time cosmological picture, similar to that of the $\Lambda$CDM, in a multidimensional scenario, in the general framework of Universal Extra Dimensions. This is achieved by utilizing a special, Kasner-type solution that is analytically known, and acts as an attractor for a plethora of pairs of initial conditions of the usual and extra spatial Hubble parameters. The phenomenology of fundamental interactions dictates the stabilization of the extra dimensional evolution from a very early epoch in these scenarios. Without an explicit mechanism, this is achieved through particular behaviors of the usual and extra spatial fluids, which have to be motivated by a more fundamental theory.

Publisher URL: http://arxiv.org/abs/1711.02723

DOI: arXiv:1711.02723v1

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