Seminarium "High Energy, Cosmology and Astro-particle Physics (HECA)"

The recent observation of neutrinos produced at the Large Hadron Collider (LHC), reported by the FASERnu and SND@LHC experiments, has given rise to a novel neutrino physics program for the LHC. In particular, the proposal of a purpose-built Forward Physics Facility (FPF) motivates studies of the discovery potential of these searches. This requires resolving degeneracies between new predictions and uncertainties in modeling neutrino production in the forward kinematic region. Based on a broad selection of existing predictions for the parent hadron spectra at FASERnu and the FPF, we parametrize the expected correlations in the spectra of neutrinos produced in their decays, and use a Fisher information approach to determine the highest achievable precision for their observation. This allows for constraining various physics processes within and beyond the Standard Model, including neutrino non-standard interactions. We also illustrate how combining multiple neutrino observables could lead to experimental confirmation of the enhanced-strangeness scenario proposed to resolve the cosmic-ray muon puzzle during LHC Run 3.