Solving the Hierarchy Problem in Two-Brane Cosmological Models
高能物理 - 唯象学
2009-09-15 v2 天体物理学
广义相对论与量子宇宙学
高能物理 - 理论
摘要
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.
引用
@article{arxiv.hep-ph/0005146,
title = {Solving the Hierarchy Problem in Two-Brane Cosmological Models},
author = {Panagiota Kanti and Keith A. Olive and Maxim Pospelov},
journal= {arXiv preprint arXiv:hep-ph/0005146},
year = {2009}
}
备注
18 pages, Latex file, 1 figure, some comments, clarifications and a reference added, typos corrected, version to appear in Physical Review D