Using SquiRels to Find LiMRs: A Model-Insensitive Approach to Cosmic Microwave Background Studies of Light but Massive Relics

arXiv:2607.12021 · astro-ph.CO, hep-ph · Submitted 2026-07-13 · Read on arXiv

Nicholas DePorzio, David Imig, Jessie Shelton

astro-ph.CO, hep-ph

Submitted: 2026-07-13

Comments: 19 pages, 11 figures

Code: https://github.com/ndeporzio/squirel

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Abundance — 24× in this paper · explained in 1 episode
• Model-Agnostic — 5× in this paper · explained in 2 episodes
• Velocity Dispersion — 5× in this paper · explained in 2 episodes
• Decoupling — 4× in this paper · explained in 2 episodes
• Simons Observatory — 4× in this paper
• Accuracy — 2× in this paper · explained in 1 episode
• Clustering — 1× in this paper · explained in 2 episodes
• Degeneracy — 1× in this paper · explained in 3 episodes
• Matter Power Spectrum — 1× in this paper · explained in 2 episodes
• Reheating — 1× in this paper · explained in 2 episodes
• Robustness — 1× in this paper · explained in 5 episodes

Sources

• Planck 2018 results. VI. Cosmological parameters
• Cosmological parameters derived from the final (PR4) Planck data release
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• The Simons Observatory: Science goals and forecasts
• The Simons Observatory: Science Goals and Forecasts for the Enhanced Large Aperture Telescope
• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology with the SPHEREX All-Sky Spectral Survey
• The LSST Dark Energy Science Collaboration (DESC) Science Requirements Document
• Cosmology with the Wide-Field Infrared Survey Telescope -- Multi-Probe Strategies
• Finding eV-scale Light Relics with Cosmological Observables
• New Light Species and the CMB
• Cosmological Probes of Light Relics
• The Physics of Light Relics
• Do observations prove that cosmological neutrinos are thermally distributed?
• Cosmological bounds on neutrino statistics
• How to relax the cosmological neutrino mass bound
• What can CMB observations tell us about the neutrino distribution function?
• Is it possible to tell the difference between fermionic and bosonic hot dark matter?
• Cosmological constraints on a light non-thermal sterile neutrino

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