Techniques for Improving Event Reconstruction in He6-CRES

The $^6$He-CRES experiment at the University of Washington CENPA aims to precisely measure the Fierz coefficient $b_{fierz}$ which parameterizes exotic currents in the Weak Interaction representing a violation of SM physics. A measurement of $b_{fierz}$ with a $10^{-3}$ uncertainty would be competitive with current LHC searches for tensor currents. The first results of broadband CRES were recently reported by our collaboration footnote{https://doi.org/10.48550/arXiv.2209.02870}.

This talk will discuss those results, and the CRES event reconstruction techniques developed to perform this broadband CRES measurement. Recent improvements in event recognition and reconstruction fidelity will be presented, as well as a new method of keeping track of the times of events which allows vetoing artifacts that can cause spectral distortions.