Multi-natural inflation in supergravity and BICEP2
Multi-natural inflation in supergravity and BICEP2
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DOI：
10.1016/j.physletb.2014.05.041
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发表时间：
2014-03
影响因子：
4.4
通讯作者：
M. Czerny;Tetsutaro Higaki;F. Takahashi
中科院分区：
文献类型：
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作者：
M. Czerny;Tetsutaro Higaki;F. Takahashi
我们重新审视最近提出的多自然暴胀和它的实现在超重力的BICEP 2结果。多自然暴胀是一个单场暴胀模型，其中暴胀子势由多个正弦函数组成，并且已知可以产生相当大的运行谱指数，这放松了BICEP 2和普朗克结果之间的紧张关系。在本文中，我们表明，多自然暴胀可以容纳范围广泛的值（ns，r），包括频谱指数接近甚至高于单位。如果张力被其他来源，如暗辐射，热暗物质或非零中微子质量解决，这将是有利的。我们还讨论了对弦理论实施的影响。
We revisit the recently proposed multi-natural inflation and its realization in supergravity in light of the BICEP2 results. Multi-natural inflation is a single-field inflation model where the inflaton potential consists of multiple sinusoidal functions, and it is known that a sizable running spectral index can be generated, which relaxes the tension between the BICEP2 and the Planck results. In this paper we show that multi-natural inflation can accommodate a wide range of values of (n s, r), including the spectral index close to or even above unity. This will be favored if the tension is resolved by other sources such as dark radiation, hot dark matter, or non-zero neutrino mass. We also discuss the implications for the implementation in string theory.