Searching for Sterile Neutrinos at J-PARC with JSNS$^2$

The J-PARC Sterile Neutrino Search at the J-PARC Spallation Neutron Source (JSNS$^2$) will look for neutrino oscillations with a characteristic frequency of $\Delta m^2 \sim$ 1 eV$^2$ . The experiment will be constructed at the J-PARC Material and Life Science Experimental Facility (MLF) and will perform a search for $\bar{\nu}_\mu \rightarrow \bar{\nu}_e$ oscillations over a 24 m baseline using muon decay at rest neutrinos originating from 3 GeV proton interactions with a mercury target. Using two tanks of Gd-doped liquid scintillator with a total fiducial volume of 50 tons, JSNS$^2$ will exploit the unique signature of inverse beta decay (prompt positron signal, delayed gammas from neutron capture) to look for $\bar{\nu}_e$ appearance. Additionally, JSNS$^2$ will enable novel cross section measurements using 236 MeV muon neutrinos from charged kaon decay at rest (KDAR).