NOPTREX: A Search for Time-Reversal Invariance Violation in Polarized Neutron-Nucleus Resonances

One of the motivations to search for new physics Beyond the Standard Model (BSM) is to understand the baryon asymmetry present in the Universe, namely the discrepancy between the theoretical prediction of the baryon asymmetry based on the SM and the value obtained through observations of the cosmic microwave background. The Neutron OPtics Time Reversal EXperiment (NOPTREX) Collaboration seeks to measure signatures of parity-odd (P-odd) and time-reversal-symmetry-odd (T-odd) interactions in polarized neutron transmission through polarized nuclear targets which contain p-wave resonances in the eV energy range. While the collaboration is conducting ongoing research at a number of neutron sources across the globe, this talk will focus on the progress of the current P-odd T-even experiment at the Los Alamos Neutron Science Center (LANSCE).