What does it take to have N eff < 3 at CMB times?

arXiv:2603.22391 · hep-ph, astro-ph.CO · Submitted 2026-03-23 · Read on arXiv

hep-ph, astro-ph.CO

Submitted: 2026-03-23

Updated: 2026-10-26

Terminology

• Abundance — 2× in this paper · explained in 1 episode

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