Update on the Status of the UCNB Experiment

Precision neutron beta decay experiments serve well as a test of the Standard Model, and act as a sensitive probe for Beyond the Standard Model (BSM) physics. The UCNB experiment at the Los Alamos Neutron Science Center (LANSCE) uses a direct measurement of the proton and coincident electron from free neutron beta decay to determine the neutrino asymmetry, B, to a target precision of 1 × 10^-3. Recent efforts have led to an improved analysis of digitized detector traces and a more detailed  understanding of detector systematics. An updated analysis of a first attempt to measure B using ultracold neutrons and a discussion of implications for future experimental efforts such as Nab will be presented.