Double-Λ hypernuclei observed in a hybrid emulsion experiment

J. K. Ahn, H. Akikawa, S. Aoki, K. Arai, S. Y. Bahk, K. M. Baik, B. Bassalleck, J. H. Chung, M. S. Chung, D. H. Davis, T. Fukuda, K. Hoshino, A. Ichikawa, M. Ieiri, K. Imai, K. Itonaga, Y. H. Iwata, Y. S. Iwata, H. Kanda, M. KanekoT. Kawai, M. Kawasaki, C. O. Kim, J. Y. Kim, S. H. Kim, S. J. Kim, Y. Kondo, T. Kouketsu, H. N. Kyaw, Y. L. Lee, J. W.C. McNabb, A. A. Min, M. Mitsuhara, K. Miwa, K. Nakazawa, Y. Nagase, C. Nagoshi, Y. Nakanishi, H. Noumi, S. Ogawa, H. Okabe, K. Oyama, B. D. Park, H. M. Park, I. G. Park, J. Parker, Y. S. Ra, J. T. Rhee, A. Rusek, A. Sawa, H. Shibuya, K. S. Sim, P. K. Saha, D. Seki, M. Sekimoto, J. S. Song, H. Takahashi, T. Takahashi, F. Takeutchi, H. Tanaka, K. Tanida, K. T. Tint, J. Tojo, H. Torii, S. Torikai, D. N. Tovee, T. Tsunemi, M. Ukai, N. Ushida, T. Wint, K. Yamamoto, N. Yasuda, J. T. Yang, C. J. Yoon, C. S. Yoon, M. Yosoi, T. Yoshida, L. Zhu

研究成果: Article査読

96 被引用数 (Scopus)


A hybrid experiment with nuclear emulsion and scintillating-fiber detectors (KEK-E373) has been performed to search for double-strangeness systems. Among about 103 events of Ξ- hyperons captured at rest by emulsion nuclei, we have observed four events which clearly show the topology of cascade weak decays of double-Λ hypernuclei including the "Nagara" event. Regarding the Nagara event, values of the two-Λ binding energy (BΛΛ) and the Λ-Λ interaction energy (ΔBΛΛ) of ΛΛ6He have been revised to 6.91 ± 0.16 and 0.67 ± 0.17 MeV, respectively, due to the recent change of the Ξ- mass value (Particle Data Group). For another three events, we have determined possible species of double-Λ hypernuclei together with their binding energies.

ジャーナルPhysical Review C - Nuclear Physics
出版ステータスPublished - 2013 7月 17

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学


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