Spectroscopic experiment of via the in-flight reaction at J-PARC K1.8BR

J-PARC K1.8BRでの反応によるの分光実験

川崎 新吾*; 橋本 直*   ; 谷田 聖   ; 他59名*

Kawasaki, Shingo*; Hashimoto, Tadashi*; Tanida, Kiyoshi; 59 of others*

Experimental investigation of via the in-flight reaction is being performed at the J-PARC K1.8BR beam-line (J-PARC E31). The first E31 physics run was carried out in June, 2016. About kaons were irradiated on the deuteron target. The missing mass spectra of the "" reactions were measured. The difference between the two spectra was observed clearly, which tells us the existence of the interference term between the isospin = 0 and 1 amplitudes. The missing mass spectrum of the "" reaction was also measured, which gives the information on the =1 amplitude. The identification of the "" reaction seems successful.