Hubble Law and Brane Matter after Ekpyrosis

Details Hubble Law and Brane Matter after Ekpyrosis Hubble Law and Brane Matter after Ekpyrosis

2001-06-29

arxiv.org/abs/hep-th/0106282v3

Nucl.Phys. B614 (2001) 388-401

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, LaTex2e. v2: References added, discussion clarified. v3: Summary of tension debate revised, wordings clarified

Scientific paper

10.1016/S0550-3213(01)00412-6

We study brane matter in the ekpyrotic scenario and observe that in order to obtain standard gravity on the visible brane, the tension of the visible brane should be positive. If the sizes of both the fifth dimension and the Calabi-Yau threefold are fixed, the Israel junction conditions do not allow time-dependent brane matter. Relaxing this constraint, it is possible to obtain approximately standard cosmology on the visible brane, with small corrections due to possible time-dependence of the Calabi-Yau threefold.

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