Chromo-Natural Inflation in the Axiverse
Chromo-Natural Inflation in the Axiverse
复制标题
轴宇宙中的色自然膨胀
DOI：
10.1103/physrevd.92.063516
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发表时间：
2015
影响因子：
5
通讯作者：
Takashi Miura and Jiro Soda
中科院分区：
文献类型：
--
作者：
Ippei Obata;Takashi Miura and Jiro Soda
我们研究宇宙中的色自然暴胀。更准确地说，我们研究了两个轴子与SU(2)规范场耦合的自然暴胀。假设耦合常数之间存在层次关系，我们发现在某些初始条件下，常规自然暴胀开始并持续数十次折叠，随后色自然暴胀取代自然暴胀。对于这些解，我们期望预测与CMB尺度上的观测结果一致。此外，由于色自然暴胀发生在暴胀阶段的后期，手性原始引力波产生的频率范围可能高于，这可能在未来的引力波观测中被探测到。
We study chromo-natural inflation in the axiverse. More precisely, we investigate natural inflation with two axions coupled with a SU(2) gauge field. Assuming a hierarchy between the coupling constants, we find that for certain initial conditions, conventional natural inflation commences and continues for tens of-foldings, and subsequently chromo-natural inflation takes over from natural inflation. For these solutions, we expect that the predictions are in agreement with observations on CMB scales. Moreover, since chromo-natural inflation occurs in the latter part of the inflationary stage, chiral primordial gravitational waves are produced in the interesting frequency range higher than, which might be detectable by future gravitational wave observations.