Recent progress and future prospects of hyperon nucleon scattering experiment

三輪 浩司*; 藤田 真奈美; 原田 健志; 長谷川 勝一   ; 細見 健二  ; 市川 真也; 今井 憲一*; 佐甲 博之   ; 佐藤 進  ; 田村 裕和; 谷田 聖   ; 山本 剛史  ; 他60名*

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.