Exploring the superimposed oscillations parameter space
Exploring the superimposed oscillations parameter space
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DOI：
10.1088/1475-7516/2005/01/007
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发表时间：
2005-01-01
影响因子：
6.4
通讯作者：
Ringeval, C
中科院分区：
文献类型：
--
作者：
Martin, J;Ringeval, C
用蒙特卡罗方法研究了具有小的叠加振荡的膨胀原始功率谱的参数空间。分析中包括了与高频振荡相对应的最有趣的区域。这些振荡起源于在膨胀阶段开始时发生的一些新的物理现象，并以新的能量尺度M-c为特征。结果表明，给出第一年的WMAP数据，标准慢滚模型仍然是最可能的模型。同时，振荡模型对数据的平均拟合度较好，这与前人的研究成果是一致的。这是参数空间中的体积效应起重要作用的典型情况。然后，我们发现振荡的幅度小于平均幅度的22%，并且新的标度M-c使得H/M-c
The space of parameters characterizing an inflationary primordial power spectrum with small superimposed oscillations is explored using Monte Carlo methods. The most interesting region corresponding to high frequency oscillations is included in the analysis. The oscillations originate from some new physics taking place at the beginning of the inflationary phase and characterized by the new energy scale M-c. It is found that the standard slow roll model remains the most probable one given the first-year WMAP data. At the same time, the oscillatory models fit the data better on average, which is consistent with previous works on the subject. This is typical of a situation where volume effects in the parameter space play a significant role. Then, we find the amplitude of the oscillations to be less than 22% of the mean amplitude and the new scale M-c to be such that H/M-c