Summary of the HypHI Phase 0 experiment and future plans with FRS at GSI (FAIR Phase 0)

Abstract Results of the HypHI Phase 0 experiment with the reaction of 6 Li+ 12 C at 2 A GeV are summarised. Invariant mass distributions as well as the lifetime measurements for 3 Λ H and 4 Λ H are discussed. The lifetime values for both the hypernuclei are respectively observed to be 183 +42 −32 ps and 140 +48 −33 ps, being significantly shorter than those of the Λ-hyperon. Statistical analyses of existing lifetime data for 3 Λ H up to 2014 confirm a significantly short lifetime of 3 Λ H, which is not explained by present models. Observed hypernuclear production cross section values for 3 Λ H and 4 Λ H are also summarised. In addition, observed signals for the final states of d + π − and t + π − are discussed. All the discussions on the results of the HypHI Phase 0 experiment in this article are based on [1] , [2] , [3] , [4] . We also present a new proposed experiment with the FRS (FRagment Separator) at GSI (FAIR Phase 0) to improve the precision of the hypernuclear spectroscopy with peripheral heavy ion induced reactions.