Recent progress and future prospects of hyperon nucleon scattering experiment

Miwa, Koji*; Fujita, Manami; Harada, Takeshi; Hasegawa, Shoichi   ; Hosomi, Kenji  ; Ichikawa, Masaya; Imai, Kenichi*; Sako, Hiroyuki   ; Sato, Susumu  ; Tamura, Hirokazu; Tanida, Kiyoshi   ; Yamamoto, Takeshi  ; 60 of others*

A new hyperon-proton scattering experiment, dubbed J-PARC E40, was performed to measure differential cross sections of the , elastic scatterings and the scattering by identifying a lot of particles in the momentum ranging from 0.4 to 0.8 GeV/ produced by the reactions. We successfully measured the differential cross sections of these three channels with a drastically improved accuracy with a fine angular step. These new data will become important experimental constraints to improve the theories of the two-body baryon-baryon interactions. Following this success, we proposed a new experiment to measure the differential cross sections and spin observables by using a highly polarized beam for providing quantitative information on the interaction. The results of three channels and future prospects of the scattering experiment are described.