QNP2022 - The 9th International Conference on Quarks and Nuclear Physics

Production of light Ξ and double-Λ hypernuclei at J-PARC

Sep 9, 2022, 9:15 AM

25m

online

Nuclear Strangeness

Speaker

Hiroyuki Fujioka (Tokyo Institute of Technology)

Description

Spectroscopy of hypernuclei with strangeness $-2$ is important to extract information on hyperon-nucleon and hyperon-hyperon interactions. In J-PARC, followed by a hybrid-emulsion experiment, a series of counter experiments with a newly constructed high-resolution spectrometer S-2S will be performed in near future. In particular, We propose an experiment (J-PARC E75 experiment) to investigate both $\mathrm{\Xi }$ and double-$\mathrm{\Lambda }$ hypernuclei using a ${}^7\mathrm{Li}$ target; in decay of ${}_{\mathrm{\Xi }}^7\mathrm{H}$, which can be populated in the ${}^7\mathrm{Li}(K^{-},K^{+})$ reaction, ${}_{\mathrm{\Lambda }\mathrm{\Lambda }}^5\mathrm{H}$ may be formed. The lightest double-$\mathrm{\Lambda }$ hypernucleus is considered to be ${}_{\mathrm{\Lambda }\mathrm{\Lambda }}^5\mathrm{H}$, according to many theoretical calculations, but it is yet to be discovered experimentally.

In this contribution, the overview of the $S=-2$ experiments at J-PARC is shown, with an emphasis on the E75 experiment.

Presentation materials

fujioka_QNP2022.pdf