Progress of the ⁴⁵Ca beta spectrum measurement at Los Alamos National Laboratory

The Standard Model describes fundamental particle interactions to high precision; however, neutrino flavor oscillations, the observed baryon asymmetry, and complete absence of gravity from the model make it clear that there exists important physics which the model does not describe: so called beyond the standard model (BSM). The Fierz interference term for beta decay is one such observable sensitive to exotic scalar/tensor currents motivated by several BSM theories. A nonzero measurement of the Fierz term essentially manifests in the form of a distortion of the beta decay electron energy spectrum. ⁴⁵Ca is a particularly appealing nucleus to attempt a measurement of the interference term, as it is an allowed, pure ground state to ground state, beta emitter. A measurement was performed at Los Alamos National Lab in 2017. A brief overview of the experiment along with some preliminary waveform data analyses will be presented.