CMB Injection Bounds on Moduli Fields

arXiv:2609.38151 · hep-th, astro-ph.CO, hep-ph · Submitted 2026-09-29 · Read on arXiv

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

Submitted: 2026-09-29

Updated: 2026-09-29

Comments: 15 pages + appendix, 3 figures

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

Terminology

• Reheating — 19× in this paper · explained in 2 episodes
• Decoupling — 11× in this paper · explained in 2 episodes
• Abundance — 9× in this paper · explained in 1 episode
• Boltzmann Equation — 3× in this paper · explained in 2 episodes
• Spectral Distortions — 3× in this paper · explained in 2 episodes
• Trace — 2× in this paper · explained in 2 episodes
• 21-cm Power Spectrum — 1× in this paper · explained in 1 episode
• Accuracy — 1× in this paper · explained in 1 episode
• Anisotropy — 1× in this paper · explained in 3 episodes
• Aperture — 1× in this paper · explained in 1 episode

Sources

• Planck 2018 results. VI. Cosmological parameters
• CMB constraints on Dark Matter models with large annihilation cross-section
• CMB Constraints on WIMP Annihilation: Energy Absorption During the Recombination Epoch
• Energy Injection And Absorption In The Cosmic Dark Ages
• A fresh look at linear cosmological constraints on a decaying dark matter component
• Constraining decaying dark matter with BOSS data and the effective field theory of large-scale structures
• Exotic energy injection in the early universe I: a novel treatment for low-energy electrons and photons
• CMB limits on decaying dark matter beyond the ionization threshold
• String Cosmology: from the Early Universe to Today
• Cosmological constraints on decaying axion-like particles: a global analysis
• The Irreducible Axion Background
• Gravitational wave background from Standard Model physics: Qualitative features
• Gravitational wave background from Standard Model physics: Complete leading order
• Gravitational Waves as a Big Bang Thermometer
• String Thermodynamics In and Out of Equilibrium: Boltzmann Equations and Random Walks
• Gravitational Waves from High Temperature Strings
• Constraining exotic high-$z$ reionization histories with Gaussian processes and the Cosmic Microwave Background
• Constraining the axiverse with reionization
• Thermal axion production in the primordial quark-gluon plasma
• Axions and saxions from the primordial supersymmetric plasma and extra radiation signatures

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