5 research outputs found
J-PARC E27 Experiment to Search for a K−pp Bound State
We have carried out an experimental search for the simplest kaonic nucleus, , by using the reaction at = 1.69 GeV/. The differential cross section of this reaction with covering a wide missing-mass range from the production threshold to the region has been measured for the first time. The inclusive missing-mass shape of the and production region was understood with a simple quasi-free picture except for an enhancement at 2.13 GeV/ due to a cusp. An obtained peak attributed to production was significantly shifted to the low mass side compared with the simulation by MeV/
Summary of the
The possible existence of deeply-bound -nuclear bound states, kaonic nuclei, has been widely discussed as products of the strongly attractive N interaction in I = 0 channels. Investigations of those exotic states will provide us unique information of the N interaction below the threshold, which is still not fully understood so far. Recently, we observed the simplest kaonic nuclei, NN, having a much deeper binding energy than normal nuclei via inflight (K−, N) reactions at the J-PARC E15 experiment. For further studies, we have proposed a series of experimental programs for the systematic investigation of light kaonic nuclei, from N (Λ(1405)) to NNNN. We will measure the NNN (A = 3) system at the new experiment approved as J-PARC E80, as a first step toward a comprehensive study