Observation of Ξ bound states in the 12C(K-,K+)X reaction at 1.8 GeV/c in J-PARC

T. Nagae, S. Kanatsuki, T. Gogami, H. Ekawa, T. Nanamura, M. Naruki, S. Hasegawa, K. Hosomi, Y. Ichikawa, K. Imai, H. Sako, S. Sato, H. Sugimura, K. Tanida, K. Kobayashi, S. H. Hayakawa, T. Hayakawa, R. Honda, Y. Nakada, M. NakagawaA. Sakaguchi, Y. Akazawa, M. Fujita, K. Miwa, Y. Sasaki, H. Tamura, T. O. Yamamoto, K. Aoki, T. Takahashi, M. Ukai, Jung Keun Ahn, W. Jung, S. H. Kim, E. Botta, A. Feliciello, S. Marcello, P. Evtoukhovitch, Z. Tsamalaidze, J. Y. Lee, T. Moon, S. Kimbara, T. Hasegawa, K. Shirotori

Research output: Contribution to journalArticle


We have carried out a pilot data taking of the J-PARC E05 experiment to search for the bound state peaks of 12 Ξ Be in the 12C(K-,K+)X reaction at 1.8 GeV/c. The measurement was performed at the K1.8 beam line of the J-PARC hadron experimental hall with a typical K- beam intensity of 6×105 every six seconds. So far the best energy resolution of about 6 MeVFWHM was achieved with the existing SKS spectrometer. With a reasonable statistics, we have succeeded to observe peak structures in the bound region, which seems to suggest that the potential depth of Ξ would be deeper than 14 MeV estimated in the previous measurements.

Original languageEnglish
Article number038
JournalProceedings of Science
Publication statusPublished - 2016 Jan 1

ASJC Scopus subject areas

  • General

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    Nagae, T., Kanatsuki, S., Gogami, T., Ekawa, H., Nanamura, T., Naruki, M., Hasegawa, S., Hosomi, K., Ichikawa, Y., Imai, K., Sako, H., Sato, S., Sugimura, H., Tanida, K., Kobayashi, K., Hayakawa, S. H., Hayakawa, T., Honda, R., Nakada, Y., ... Shirotori, K. (2016). Observation of Ξ bound states in the 12C(K-,K+)X reaction at 1.8 GeV/c in J-PARC. Proceedings of Science, 2016-September, [038].