Speaker
Description
The primary purpose of the JSNS2 (J-PARC Sterile Neutrino Search at the J-PARC Spallation Neutron Source) experiment is to search for neutrino oscillations over a short 24 m baseline with Δm2 near 1 eV square. Physics run data have been acquired in 2021/2022, corresponding to 23 % of approved Proton On Target (POT) by J-PARC. We also have a plan for using another detector as the 2nd phase of the experiment (JSNS2-II). The 2nd detector will be installed on the far side, 48 m from the target, to observe neutrinos' more apparent oscillation behavior. It will be filled with 32 tons of Gd-LS, and designed with a longer baseline than the near-side detector. Combined analysis using both detectors is expected to reduce systematic uncertainties and provide significantly better sensitivity, especially in the low Δm2 region. In this presentation, we will summarize the latest results of JSNS2, and the status of JSNS2-II.
