Current and Future Constraints on the Primordial Power Spectrum

arXiv:2609.35964 · astro-ph.CO, hep-ph, hep-th · Submitted 2026-09-28 · Read on arXiv

astro-ph.CO, hep-ph, hep-th

Submitted: 2026-09-28

Updated: 2026-09-28

Code: https://github.com/CMB-HD/hdMockData

Terminology

• Accuracy — 48× in this paper · explained in 1 episode
• Matter Power Spectrum — 12× in this paper · explained in 2 episodes
• Consistency — 8× in this paper · explained in 3 episodes
• Simons Observatory — 5× in this paper
• ACT Data — 4× in this paper · explained in 1 episode
• Degeneracy — 4× in this paper · explained in 3 episodes
• Abundance — 3× in this paper · explained in 1 episode
• Anisotropy — 3× in this paper · explained in 3 episodes
• Atacama Cosmology Telescope — 3× in this paper
• Baryonic Feedback — 3× in this paper · explained in 3 episodes
• Calibration — 2× in this paper · explained in 7 episodes
• Reheating — 2× in this paper · explained in 2 episodes
• AGN — 1× in this paper · explained in 1 episode
• Baryon Acoustic Oscillation — 1× in this paper
• Core — 1× in this paper · explained in 2 episodes
• Dark Energy Spectroscopic Instrument — 1× in this paper
• Fisher Information — 1× in this paper · explained in 3 episodes
• Non-Gaussianity — 1× in this paper · explained in 2 episodes
• Nonminimal coupling — 1× in this paper · explained in 2 episodes
• Primordial non-Gaussianity — 1× in this paper · explained in 2 episodes
• Robustness — 1× in this paper · explained in 5 episodes
• Spectral Distortions — 1× in this paper · explained in 2 episodes
• Topological Defects — 1× in this paper · explained in 2 episodes

Sources

• CMB-S4 Science Book, First Edition
• The Quest for B Modes from Inflationary Gravitational Waves
• Planck 2018 results. IX. Constraints on primordial non-Gaussianity
• Constraining local non-Gaussianities with kSZ tomography
• Reconstructing the primordial power spectrum
• Complete WMAP Constraints on Bandlimited Inflationary Features
• Cosmological parameter estimation with free-form primordial power spectrum
• Planck 2018 results. X. Constraints on inflation
• Knot reconstruction of the scalar primordial power spectrum with Planck, ACT, and SPT CMB data
• The Atacama Cosmology Telescope: DR6 Constraints on Extended Cosmological Models
• Planck 2018 results. VI. Cosmological parameters
• The Atacama Cosmology Telescope: DR6 Power Spectra, Likelihoods and $\Lambda$CDM Parameters
• SPT-3G D1: CMB temperature and polarization power spectra and cosmology from 2019 and 2020 observations of the SPT-3G Main field
• DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
• The Simons Observatory: Science Goals and Forecasts for the Enhanced Large Aperture Telescope
• Snowmass2021 CMB-HD White Paper
• SRoll2: an improved mapmaking approach to reduce large-scale systematic effects in the Planck High Frequency Instrument legacy maps
• Reionization optical depth determination from Planck HFI data with ten percent accuracy
• Unified and consistent structure growth measurements from joint ACT, SPT and \textit{Planck} CMB lensing
• Data Release 1 of the Dark Energy Spectroscopic Instrument

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