Comparing infrared Dirac-Born-Infeld brane inflation to observations
Comparing infrared Dirac-Born-Infeld brane inflation to observations
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DOI：
10.1103/physrevd.77.023527
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发表时间：
2007-10
影响因子：
5
通讯作者：
R. Bean;Xingang Chen;H. Peiris;Jiajun Xu
中科院分区：
文献类型：
--
作者：
R. Bean;Xingang Chen;H. Peiris;Jiajun Xu
我们将红外 Dirac-Born-Infeld 膜膨胀模型与使用贝叶斯分析的观测结果进行比较。当前数据无法将其与 $\ensuremath{\Lambda}\mathrm{CDM}$ 模型区分开来，但能够对各种微观参数给出有趣的约束，包括膜模量势的质量、基本弦尺度、喉部的电荷或扭曲因子以及移动膜的数量。我们用字符串特征来量化一些独特的可测试预测，例如大的非高斯性，以及大但区域性的光谱指数运行。这些结果说明了我们如何能够利用宇宙学观测来探索弦理论的各个方面。
We compare the infrared Dirac-Born-Infeld brane inflation model to observations using a Bayesian analysis. The current data cannot distinguish it from the $\ensuremath{\Lambda}\mathrm{CDM}$ model but is able to give interesting constraints on various microscopic parameters including the mass of the brane moduli potential, the fundamental string scale, the charge or warp factor of throats, and the number of the mobile branes. We quantify some distinctive testable predictions with stringy signatures, such as the large non-Gaussianity, and the large, but regional, running of the spectral index. These results illustrate how we may be able to probe aspects of string theory using cosmological observations.