Searching for Two-Neutrino and Neutrinoless Double Beta Decay of ${}^{134}$Xe with the PandaX-4T Experiment

PandaX Collaboration, Xiyu Yan, Zhaokan Cheng +94

${}^{134}$Xe is a candidate isotope for neutrinoless double beta decay~($0\nu \beta \beta$) search. In addition, the two-neutrino case ($2\nu \beta \beta$) allowed by the Standard Model of particle physics…