Axion monodromy inflation with multi-natural modulations
Axion monodromy inflation with multi-natural modulations
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DOI：
10.1088/1475-7516/2014/10/025
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发表时间：
2014-05
影响因子：
6.4
通讯作者：
Tetsutaro Higaki;Tatsuo C. Kobayashi;O. Seto;Yuya Yamaguchi
中科院分区：
文献类型：
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作者：
Tetsutaro Higaki;Tatsuo C. Kobayashi;O. Seto;Yuya Yamaguchi
本文研究了用与轴子有关的动态生成项修正的轴子单值暴胀中的参数空间。电势具有多个正弦函数的线性项，其在产生调制中起作用。结果表明，该势导致了大的张量标量比rT = 0.16和谱指数αs =（0.02 - 0.03）的负向变化，从而改善了普朗克和BICEP 2结果之间的矛盾.为了实现这些结果，需要在动力学尺度之间建立一个小的层次结构，而在该模型中，正弦函数中的衰减常数保持亚普朗克。我们还讨论了通货膨胀后的再加热过程，在一个自下而上的方法。
We study parameter space in the axion monodromy inflation corrected by dynamically generated terms involving with the axion. The potential has the linear term with multiple sinusoidal functions, which play a role in generating modulations. We show that this potential leads both to a large tensor-to-scalar ratio rT ∼ 0.16 and to a large negative running of spectral index αs ∼ - (0.02 -0.03), ameliorating the tension between the result of the PLANCK and that of the BICEP2. To realize these results, a small hierarchy among dynamical scales is required whereas the decay constants in sinusoidal functions remain sub-Planckian in this model. We discuss also reheating process after the inflation in a bottom-up approach.