Strong coupling in nonrelativistic general covariant theory of gravity

被引：33

作者：

Lin, Kai ^{[1
,2
]}

Wang, Anzhong ^{[1
,2
]}

Wu, Qiang ^{[1
]}

Zhu, Tao ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Inst Adv Phys & Math, Hangzhou 310032, Zhejiang, Peoples R China

[2] Baylor Univ, Dept Phys, GCAP CASPER, Waco, TX 76798 USA

来源：

PHYSICAL REVIEW D | 2011年 / 84卷 / 04期

关键词：

D O I：

10.1103/PhysRevD.84.044051

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the strong coupling problem in the Horava-Melby-Thompson setup of the Horava-Lifshitz theory of gravity with an arbitrary coupling constant lambda, generalized recently by da Silva, where lambda describes the deviation of the theory in the infrared from general relativity that has lambda(GR) = 1. We find that a scalar field in the Minkowski background becomes strongly coupled for processes with energy higher than Lambda(omega)[equivalent to (M-pl/c(1))M-3/2(pl)vertical bar lambda - 1 vertical bar(5/4)], where generically c(1) << M-pl. However, this problem can be cured by introducing a new energy scale M-*, so that M-* < Lambda(omega), where M-* denotes the suppression energy of high-order derivative terms of the theory.

引用

页数：8

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