Exponentially large extra dimensions

被引：33

作者：

Albrecht, A

Burgess, CP

Ravndal, F

Skordis, C

机构：

[1] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[2] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA

[3] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[4] Univ Oslo, Inst Phys, N-0316 Oslo, Norway

来源：

PHYSICAL REVIEW D | 2002年 / 65卷 / 12期

关键词：

D O I：

10.1103/PhysRevD.65.123506

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show how the presence of a very light scalar with a cubic self-interaction in six dimensions can stabilize the extra dimensions at radii that are naturally exponentially large, rsimilar tol exp[(4pi)(3)/g(2)], where l is a microscopic physics scale and g is the (dimensionless) cubic coupling constant. The resulting radion mode of the metric becomes a very light degree of freedom whose mass msimilar to1/(M(p)r(2)) is stable under radiative corrections. For 1/rsimilar to10(-3) eV the radion is extremely light, msimilar to10(-33) eV. Its couplings cause important deviations from general relativity in the very early universe, but naturally evolve to phenomenologically acceptable values at present.

引用

页数：14

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