Speaker
Description
The search for beyond the Standard Model interactions of neutrinos and other light new physics species is one of the most promising experimental targets, which, in the high-energy regime, is also currently less explored. In the talk, we will discuss novel prospects for such studies that will be opened up thanks to a new far-forward physics program at the LHC to be initiated with the FASER experiment. We will illustrate this for GeV-scale heavy neutral leptons (HNLs) that could be produced in neutrino scatterings mediated by the dipole or light vector portal, but also for long-lived dark photons, dark Higgs bosons, and stable dark matter particles of similar mass that can be produced in interaction right in front of the detector. Such a secondary production of new physics species would also extend the reach of the proposed MATHUSLA and SHiP detectors. In all cases, we find good discovery prospects of BSM physics.
