Observation of Double-Strangeness Nuclei at J-PARC

for the J-PARC E07 collaboration

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1 Citation (Scopus)


Double-strangeness nuclei, i.e. double Λ hypernuclei and Ξ hypernuclei, are few-body nuclear systems containing two strange quarks. They are valuable information sources on the ΛΛ and ΞN interaction, which are essential for understanding baryon-baryon interactions under the flavour SU(3) symmetry. In 2016 and 2017, we conducted the J-PARC E07 experiment to study the double-strangeness nuclei in a hadron experimental facility at J-PARC. J-PARC E07 was conducted using the emulsion-counter hybrid method; it is the most complex experiment on the double-strangeness nuclei. We completed the analysis in the first stage using the method adopted in the experimental proposal. Currently, 33 double-strangeness nucleus events have been detected, three times as much as that of the previous experiments. We succeeded in identifying the nuclide for several events. As typical events, we introduce a double Λ hypernuclei event (MINO) and three Ξ-- 14N bound systems (IBUKI, KINKA, and IRRAWADDY) in this article.

Original languageEnglish
Article number13
JournalFew-Body Systems
Issue number1
Publication statusPublished - 2022 Mar


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