Exponentially large extra dimensions

被引:34
|
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.
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页数:14
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