Plasma Effects Suppress Mixing-Induced Collisional Freeze-In

arXiv:2609.29911 · hep-ph, astro-ph.CO · Submitted 2026-09-24 · Read on arXiv

hep-ph, astro-ph.CO

Submitted: 2026-09-24

Updated: 2026-09-24

Terminology

• Abundance — 4× in this paper · explained in 1 episode
• Boltzmann Equation — 4× in this paper · explained in 2 episodes
• Trace — 4× in this paper · explained in 2 episodes
• Standard Model — 2× in this paper
• Effective Hamiltonian — 1× in this paper · explained in 2 episodes
• Generalization — 1× in this paper · explained in 13 episodes
• Symmetry Breaking — 1× in this paper · explained in 3 episodes
• Wigner function — 1× in this paper · explained in 2 episodes
• alpha — 1× in this paper · explained in 1 episode

Sources

• Freeze-In Production of FIMP Dark Matter
• Planck 2018 results. VI. Cosmological parameters
• Dark Matter, Baryogenesis and Neutrino Oscillations from Right Handed Neutrinos
• A White Paper on keV Sterile Neutrino Dark Matter
• Sterile Neutrino Dark Matter
• Bosonic super-WIMPs as keV-scale dark matter
• Massive hidden photons as lukewarm dark matter
• Signatures of a hidden cosmic microwave background
• New stellar constraints on dark photons
• Cosmological Constraints on Very Dark Photons
• Dark photon limits: a handbook
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
• Sterile neutrinos produced near the EW scale I: mixing angles, MSW resonances and production rates
• Thermal production of ultrarelativistic right-handed neutrinos: Complete leading-order results
• New Production Mechanism for keV Sterile Neutrino Dark Matter by Decays of Frozen-In Scalars
• Production of heavy sterile neutrinos from vector boson decay at electroweak temperatures
• Seesaw determination of the dark matter relic density
• Imprint of the seesaw mechanism on feebly interacting dark matter and the baryon asymmetry
• Dark matter produced from right-handed neutrinos
• Thermal effects in freeze-in neutrino dark matter production

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• Axions as Dark Matter, Dark Energy, and Dark Radiation