Impact of non-standard neutrino-electron interactions on Big Bang Nucleosynthesis
The study investigates how non-standard neutrino interactions (NSI) with electrons change neutrino decoupling and subsequent Big Bang Nucleosynthesis (BBN). By tracking NSI effects on neutrino distributions, the research shows that primordial abundances like helium-4 are sensitive to these modifications, offering a complementary probe to standard $N_{ m eff}$ measurements. Cosmological constraints derived from this study are compared against terrestrial limits.