Probing Heavy Neutral Leptons through New Gauge Interactions at the Forward Physics Facilities
We investigate the prospects for improving the heavy neutral lepton (HNL) searches at the far-forward LHC experiments FASER and FASER$\nu$, as well as their proposed HL-LHC successors, FASER2 and FASER$\nu$2, using new HNL production mechanisms. We consider scenarios in which HNLs couple directly to a new $U(1)$ gauge...