http://arxiv.org/abs/1712.08758
The precise measurements of Cosmic Microwave Background Anisotropy angular power spectra made by the Planck satellite show an anomalous value for the lensing amplitude, defined by the parameter $A_{lens}$, at $2.3$ standard deviations. In this paper we quantify the potential of future CMB measurements in confirming/falsifying the $A_{lens}$ anomaly. We found that a space-based experiment as LiteBIRD could falsify the current $A_{lens}$ anomaly at the level of $5$ standard deviations. Similar constraints can be achieved by a Stage-III experiment assuming an external prior on the reionization optical depth of $\tau=0.055\pm0.010$ as already provided by the Planck satellite. A Stage-IV experiment could further test the $A_{lens}$ anomaly at the level of $10$ standard deviations. We also evaluate the future constraints on a possible scale dependence for $A_{lens}$.
F. Renzi, E. Valentino and A. Melchiorri
Wed, 27 Dec 2017
46/56
Comments: 5 pages, 4 figures
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