Improved calculations of beta decay backgrounds to new physics in liquid xenon detectors

Scott Haselschwardt, Joel Kostensalo, Xavier Mougeot +1

We present high-precision theoretical predictions for the electron energy spectra for the ground-state to ground-state $\beta$ decays of ${}^{214}$Pb, ${}^{212}$Pb, and ${}^{85}$Kr most rele…