A stringy origin of the recent acceleration

被引：2

作者：

Biswas, T ^{[1
]}

Mazumdar, A ^{[1
]}

机构：

[1] McGill Univ, CHEP, Montreal, PQ H3A 2T8, Canada

来源：

PHYSICS LETTERS B | 2006年 / 634卷 / 5-6期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/j.physletb.2006.02.015

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Inspired by the current observations that the ratio of the abundances of dark energy and matter density is close to one, we provide a string inspired phenomenological model where we try to explain this order one ratio, smallness of the cosmological constant, and also the recent cosmic acceleration. We observe that any effective theory motivated by higher-dimensional physics provides radion/dilaton couplings to the standard model and the dark matter component with different strengths. Provided radion/dilaton is a dynamical field we then show that the dark energy component tracks matter density and can start to dominate very recently. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：437 / 441

页数：5

共 40 条

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