论文标题
光谱扭曲因轴支单形成膨胀而产生的畸变
Spectral Distortions from Axion Monodromy Inflation
论文作者
论文摘要
随着新任务的出现，以探测宇宙微波背景的光谱扭曲具有前所未有的精度，对这些信号的理论预测的研究成为测试我们对早期宇宙的描述的有希望的途径。同时，Axion Monodromy仍然提供了一个可行的框架来描述宇宙通胀。为了探索基于轴突单型的通货膨胀模型的新约束，同时旨在伪造这种情况，我们计算了该模型预测的光谱扭曲，揭示了与Planck数据兼容的振荡特征。此外，预测的扭曲比从基准LCDM模型获得的信号大高达10％，并且原则上可观察到。但是，与最简单的幂律通货膨胀潜力的预测形成对比，挑战了轴突单片的可变性，因为它需要减少小精灵卫星当前预测误差的至少100倍，这在某些预计的观察设置中可能是可能的。
With the advent of new missions to probe spectral distortions of the cosmic microwave background with unprecedented precision, the study of theoretical predictions of these signals becomes a promising avenue to test our description of the early Universe. Meanwhile, axion monodromy still offers a viable framework to describe cosmic inflation. In order to explore new constraints on inflationary models based on axion monodromy while aiming at falsifying this scenario, we compute the spectral distortions predicted by this model, revealing oscillatory features that are compatible with Planck data. Further, the predicted distortions are up to 10% larger than the signals obtained from the fiducial LCDM model and are observable in principle. However, contrasting with the predictions of the simplest power-law inflationary potentials challenges the falsifiability of axion monodromy as it would require to reduce at least 100 times the current forecast error of the PIXIE satellite, which shall be possible at some projected observational setups.
