J-PARC E07; Systematic study of double strangeness system with hybrid emulsion method

Yoshida, Junya; Akaishi, Takaya; Fujita, Manami; Hasegawa, Shoichi   ; Hashimoto, Tadashi   ; Hosomi, Kenji  ; Ichikawa, Masaya; Ichikawa, Yudai   ; Imai, Kenichi*; Kim, S.; Nanamura, Takuya; Naruki, Megumi; Sako, Hiroyuki   ; Sato, Susumu  ; Tamura, Hirokazu; Tanida, Kiyoshi   ; Yamamoto, Takeshi  ; 86 of others*

J-PARC E07 is the most ambitious and complex emulsion experiment to date investigating double hypernuclei with Hybrid emulsion method. The physics run at the K1.8 beam line in the J-PARC hadron experimental facility have been completed in 2017. The emulsion sheets are presently being analyzed with dedicated optical microscopes. Current statistics are estimated to be more 3 times than that of previous experiments. Quantitative data on the and interaction are being accumulated successfully via analysis of double and hypernuclei. Multiple hypernucleus candidates suggests several features about hypernucleus that the identification efficiency of C is significantly higher than other mode, many daughters of C are identified as He or Be, and multiple bound states of exist in the N nucleus. An analysis of X-ray spectroscopy of hyperatoms are ongoing.