Search for the bound state in the final states of the in-flight reaction on He

Heを標的とした飛行反応での終状態解析による束縛核の探索

橋本 直   

Hashimoto, Tadashi

In recent years, the possible existence of deeply-bound nuclear bound states has been widely discussed as a consequence of the strongly attractive interaction in I = 0 channels. Very recently, J-PARC E15 experiment reported an observation of the simplest kaonic nuclei, , in the invariant-spectrum of the in-flight reaction on helium-3. Observation of other kaonic nuclei would provide a further support for the existence of such exotic states. Furthermore, mass-number dependence of kaonic nuclear systems would be of great importance to study interplay between the attraction and the repulsion at short distances. We collected -induced data on helium-4 as a feasibility test of a lifetime measurement of light hypernuclei (J-PARC T77) in June 2020. In this contribution, we would like to present the latest results of the analysis, and discuss future prospects towards more comprehensive investigation of the system.