Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-05-15
Phys.Rev.D62:126004,2000
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, Latex file, 1 figure, some comments, clarifications and a reference added, typos corrected, version to appear in Phy
Scientific paper
10.1103/PhysRevD.62.126004
We analyze cosmological solutions in the class of two-brane models with arbitrary tensions which contain matter with general equations of state. We show that the mass hierarchy between the two branes is determined by the ratio of the lapse functions evaluated on the branes. This ratio can be sufficiently small without fine-tuning the brane separation, once the transverse dimension is stabilized. For suitably large interbrane separations, both brane tensions are positive. We also find that the cosmological evolution obeys the standard four-dimensional Friedman equation up to small corrections.
Kanti Panagiota
Olive Keith A.
Pospelov Maxim
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