标题： 功率抑制和透镜异常——一项现象学研究 显示英文标题

标题： Power Suppression and Lensing Anomaly -- A phenomenological investigation

摘要： 具有低功率的原始功率谱可以在长波长下减轻透镜异常。然而，数据支持这种原始功率谱的程度尚不清楚。在这项工作中，我们借助有效的尺度模型研究了功率抑制和与透镜异常相关的缓解。我们考虑接近尺度不变功率谱的简单扩展，例如包括谱指数的运行和运行的运行。我们对这些模型进行了贝叶斯分析，这些模型对功率抑制持中立态度，并使用各种数据集表明数据倾向于选择导致低多极矩功率抑制的参数。然后，我们使用信息准则分析了这些发现的意义。此外，我们调查了近未来的CMB任务（如ECHO）对这些模型施加更严格限制的能力。我们得出结论，通过研究这类简单的现象学模型，我们可以对未来功率抑制的存在做出更强有力的结论。 显示英文摘要

摘要： Primordial power spectra with low power at long wavelengths can alleviate lensing anomaly. However the extent to which data favours such a primordial spectra is not clear. In this work, we investigate power suppression and related mitigation of lensing anomaly with the help of phenomenological models which are valid over scales of interest. We consider simple extensions to nearly scale invariant power spectra such as those which includes running and running of running of spectral index. We perform Bayesian analysis of these models, which are agnostic about power suppression, with various data sets and show that data tend to choose parameters which leads to power suppression at low multipoles. We then analyse the significance of these findings using information criteria. Further, we investigate the ability of near-ultimate future CMB missions such as ECHO to put tighter constraints on these models. We conclude that we can make stronger conclusions about the presence of power suppression in the future by studying such simple phenomenological models.