Cornering the Planck $A_{lens}$ tension with future CMB data

Abstract

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 more than $2$ standard deviations. In this paper, after discussing the current status of the anomaly, we quantify the potential of future CMB measurements in confirming/falsifying the $A_{lens}$ tension. We find that a space-based experiment as LiteBIRD could falsify the current $A_{lens}$ tension 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 $\tau =0.055\pm 0.010$ as already provided by the Planck satellite. A Stage-IV experiment could further test the $A_{lens}$ tension at the level of $10$ standard deviations. A comparison between temperature and polarization measurements made at different frequencies could further identify possible systematics responsible for $A_{lens}>1$. We show that, in the case of the CMB-S4 experiment, polarization data alone will have the potential of falsifying the current $A_{lens}$ anomaly at more than five standard deviation and to strongly bound its frequency dependence. We also evaluate the future constraints on a possible scale dependence for $A_{lens}$.

5 pages, 4 figures

References in corpus (5)

• Cosmic Microwave Weak lensing data as a test for the dark universe
• KiDS-450: The tomographic weak lensing power spectrum and constraints on cosmological parameters
• A Vacuum Phase Transition Solves $H_0$ Tension
• Tensions between direct measurements of the lens power spectrum from Planck data
• The impact of theoretical assumptions in the determination of the neutrino effective number from future CMB measurements

Cited by in corpus (28)

• DESI 2024 VII: Cosmological Constraints from the Full-Shape Modeling of Clustering Measurements
• Updated results on neutrino mass and mass hierarchy from cosmology with Planck 2018 likelihoods
• Cosmology in Extended Parameter Space with DESI Data Release 2 Baryon Acoustic Oscillations: A 2$\sigma$+ Detection of Nonzero Neutrino Masses with an Update on Dynamical Dark Energy and Lensing Anomaly
• The state of the dark energy equation of state circa 2023
• Dynamical Dark Energy Beyond Planck? Constraints from multiple CMB probes, DESI BAO and Type-Ia Supernovae
• Planck 2015 constraints on the non-flat XCDM inflation model
• A fake Interacting Dark Energy detection?
• Modified Gravity Constraints from the Full Shape Modeling of Clustering Measurements from DESI 2024
• Lensing-like tensions in the Planck legacy release
• The cosmological impact of future constraints on $H_0$ from gravitational-wave standard sirens
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• Model marginalized constraints on neutrino properties from cosmology
• Measuring the reionization optical depth without large-scale CMB polarization
• Sources of $H_0$-tensions in dark energy scenarios
• Testing signatures of phantom crossing through full-shape galaxy clustering analysis
• Strong Bounds on Sum of Neutrino Masses in a 12 Parameter Extended Scenario with Non-Phantom Dynamical Dark Energy ($w(z)\ge -1$)
• Probing spatial variation of the fine-structure constant using the CMB
• Planck-PR4 anisotropy spectra show (better) consistency with General Relativity
• The BAHAMAS project: Effects of dynamical dark energy on large-scale structure
• No Slip CMB
• Neutrino mass tension or suppressed growth rate of matter perturbations?
• Forecast Analysis on Interacting Dark Energy Models from Future Generation PICO and DESI Missions
• Cosmologically viable generalized Einstein-Aether theories
• Excess of lensing amplitude in the Planck CMB power spectrum
• Current and Future constraints on single-field $\alpha$-Attractor model
• Impact of Low ell's on Large Scale Structure Anomalies
• One Extension to Explain Them All, One Scale-Invariant Spectrum to Test Them All, and in One Model Bind Them
• Constraints on Generalized Gravity-Thermodynamic Cosmology from DESI DR2