J-PARC E07: Systematic Study of Double Strangeness System with Hybrid Emulsion Method

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 Λ Λ and \Xi N interaction are being accumulated successfully via analysis of double Λ and \Xi hypernuclei. Multiple \Xi hypernucleus candidates suggests several features about \Xi hypernucleus that the identification efficiency of _\Xi ¹⁵C is significantly higher than other mode, many daughters of _\Xi ¹⁵C are identified as He or Be, and multiple bound states of \Xi ^- exist in the ¹⁴N nucleus. An analysis of X-ray spectroscopy of \Xi ^- hyperatoms are onging.