Impact of non-standard neutrino-electron interactions on Big Bang Nucleosynthesis

arXiv:2602.23915 · hep-ph, astro-ph.CO · Submitted 2026-02-27 · Read on arXiv

hep-ph, astro-ph.CO

Submitted: 2026-02-27

Updated: 2026-10-21

Comments: 25 pages, 12 figures, 4 tables. Version 3 matches the accepted manuscript to appear in JCAP. Version 2 addresses an inconsistent treatment of the initial baryon-to-photon ratio when varying the NSI parameters, that affected the final deuterium abundance. The main conclusions are unchanged

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

Terminology

• Big Bang Nucleosynthesis — 2× in this paper
• Decoupling — 2× in this paper · explained in 2 episodes
• Big Bang Nucleosynthesis (BBN) — 1× in this paper · explained in 2 episodes

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