Big Bang Nucleosynthesis and the Neutrino-Extended Standard Model Effective Field Theory

Pieter Braat, Jordy de Vries, Jelle Groot +2

We study the impact of light GeV-scale heavy neutral leptons (HNLs) on Big Bang nucleosynthesis (BBN) in the neutrino-extended Standard Model Effective Field Theory ($\nu$SMEFT). We…