The J-PARC E88 experiment is proposed to study the in-medium modification of the π meson mass using high-statistics πΎ+πΎβ decay measurements in proton-nucleus collisions. We study π mass dependence on momentum to evaluate β¨π π β© condensate in the nucleon with the mass shift extrapolated to zero momentum. We also aim to study the slopes of the mass shift as a function of the momentum-squared for longitudinally and transversely polarized s, which are closely related to higher-order quark and gluon condensates than qq. For Kaon identification, we will introduce detectors: Multi-gap Resistive Plate Chambers, Start Counters, and Aerogel Cherenkov counters at the forward angles in the E16 Spectrometer. In April-June 2024, we tested these detectors to evaluate the particle identification performance.
Liu et al. (Mon,) studied this question.