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arXiv · 0812.3421

Brane inflation revisited after WMAP five-year results

Yin-Zhe Ma·Xin Zhang
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Abstract

In this paper, we revisit brane inflation models with the WMAP five-year results. The WMAP five-year data favor a red-tilted power spectrum of primordial fluctuations at the level of two standard deviations, which is the same as the WMAP three-year result qualitatively, but quantitatively the spectral index is slightly greater than the three-year value. This result can bring impacts on brane inflation models. According to the WMAP five-year data, we find that the KKLMMT model can survive at the level of one standard deviation, and the fine-tuning of the parameter $β$ can be alleviated to a certain extent at the level of two standard deviations.

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Yin-Zhe Ma, Xin Zhang. 2009-03-04. Brane inflation revisited after WMAP five-year results. https://doi.org/10.1088/1475-7516%2F2009%2F03%2F006

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