Neutrino Portals to Beyond Standard Model Physics: From 100 MeV to 100 GeV

This talk will cover new ideas to search for physics beyond the Standard Model with accelerator neutrino beams in the intermediate energy range. I will review searches for heavy neutral leptons, dark photons, and light scalars using decay-in-flight and neutrino-scattering signatures. I will review several models proposed to explain anomalies in accelerator experiments, focusing on dark sector models and their interplay with other intensity frontier experiments. I will then conclude with the prospect of their discovery at current and future facilities.