K¯ -nuclear bound systems, kaonic nuclei, have been widely discussed as products of the strongly attractive K¯ N interaction in I= 0 channels. Recently, we demonstrated that kaonic nuclei can be produced via in-flight (K-, N) reactions using the low-momentum DC kaon beam at the J-PARC E15 experiment. We observed the simplest kaonic nuclei, K-pp, having a much deeper binding energy than normal nuclei. For further studies, we have proposed a series of experimental programs for the systematic investigation of light kaonic nuclei, from K¯ N (Λ (1405)) to K¯ NNNN. In the new experiment approved as J-PARC E80, we will measure the K¯ NNN (A= 3) system as a first step toward a comprehensive study.
Bibliographical noteFunding Information:
We are grateful to all the staff members of J-PARC/KEK/JAEA for their extensive efforts in the successful operation of the facility. This work is supported in part by MEXT Grants-in-Aid 26800158, 17K05481, 26287057, 24105003, 14102005, 17070007, 18H05402, 18H01237, and 20K04006. Part of this work is also supported by the Ministero degli Affari Esteri e della Cooperazione Internazionale, Direzione Generale per la Promozione del Sistema Paese (MAECI), StrangeMatter project.
© 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics