New stage of S=-2 hypernuclear study opened with a new high-resolution spectrometer

Spectroscopy of strangeness −2 systems has not been greatly in progress, because of the limited K− beam intensity to produce such systems and the limited energy resolution to identify them. Increasing K− beam intensity at J-PARC will enable us to carry out the spectroscopy by improving the energy resolution of the spectrometers in one order of magnitude from 14 MeV to ????2 MeV. The status of the new spectrometer S − 2S is reported.