Inflation in Gauss-Bonnet brane cosmology

被引：116

作者：

Lidsey, JE ^{[1
]}

Nunes, NJ ^{[1
]}

机构：

[1] Queen Mary Univ London, Sch Math Sci, Astron Unit, London E1 4NS, England

来源：

PHYSICAL REVIEW D | 2003年 / 67卷 / 10期

关键词：

D O I：

10.1103/PhysRevD.67.103510

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The effect of including a Gauss-Bonnet contribution in the bulk action is investigated within the context of the steep inflationary scenario. When inflation is driven by an exponential inflaton field, this Gauss-Bonnet term allows the spectral index of the scalar perturbation spectrum to take values in the range 0.944 and 0.989, thereby bringing the scenario in closer agreement with the most recent observations. Once the perturbation spectrum is normalized to the microwave background temperature anisotropies, the value of the spectral index is determined by the Gauss-Bonnet coupling parameter and the tension of the brane and is independent of the logarithmic slope of the potential.

引用

页数：9

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