{"paper":{"title":"Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Iskendir, A. Kasagi, A. Koshikawa, A. M. M. Theint, A. N. L. Nyaw, A. T. Moe, B. Bassalleck, C. S. Yoon, D. H. Zhang, D. Nakashima, E. Hayata, E. Hirose, E. Umezaki, F. Schupp, H. Ekawa, H. Ito, H. Kanauchi, H. Kobayashi, H. Sako, H. Sugimura, H. Takahashi, H. Tamura, J. K. Ahn, J. Pochodzalla, J. W. Lee, J. Y. Lee, J. Yoshida, J. Y. Sohn, K. Agari, K. Hicks, K. Hoshino, K. Hosomi, K. Imai, K. Inaba, K. Ito, K. Kobayashi, K. Miwa, K. Nakazawa, K. N. Suzuki, K. Oue, K. Shirotori, K. Tanida, K. T. Tint, K. Watanabe, M. Fujita, M. Hirose, M. H. Kim, M. Ichikawa, M. Ieiri, M. K. Soe, M. Minakawa, M. Moritsu, M. M. Soe, M. Nakagawa, M. Naruki, M. Ohashi, M. Ukai, M. Yoshimoto, N. Fujioka, R. Goto, R. Honda, R. Kiuchi, S. Ashikaga, S. Bleser, S. B. Yang, S. Hasegawa, S. H. Hayakawa, S. H. Hwang, S. H. Kim, S. Hoshino, S. Kanatsuki, S. Kinbara, S. Ozawa, S. Sato, S. Y. Matsumoto, S. Y. Ryu, T. Akaishi, T. Hashimoto, T. Hayakawa, T. J. Moon, T. Kawai, T. Koike, T. L. Ma, T. Nanamura, T. O. Yamamoto, T. Takahashi, T. Takeda, T. Watabe, W. S. Jung, Y. Akazawa, Y. Endo, Y. Fujikawa, Y. Han, Y. Ichikawa, Y. Ishikawa, Y. Nagase, Y. Nakada, Y. Ogura, Y. Sasaki, Y. Sato, Y. Takahashi, Y. Toyama, Z. Zhang","submitted_at":"2018-11-19T14:34:04Z","abstract_excerpt":"A double-$\\Lambda$ hypernucleus, ${}_{\\Lambda\\Lambda}\\mathrm{Be}$, was observed by the J-PARC E07 collaboration in nuclear emulsions tagged by the $(K^{-},K^{+})$ reaction. This event was interpreted as a production and decay of $ {}_{\\Lambda\\Lambda}^{\\;10}\\mathrm{Be}$, ${}_{\\Lambda\\Lambda}^{\\;11}\\mathrm{Be}$, or ${}_{\\Lambda\\Lambda}^{\\;12}\\mathrm{Be}^{*}$ via $\\Xi^{-}$ capture in ${}^{16}\\mathrm{O}$. By assuming the capture in the atomic 3D state, the binding energy of two $\\Lambda$ hyperons$\\,$($B_{\\Lambda\\Lambda}$) of these double-$\\Lambda$ hypernuclei are obtained to be $15.05 \\pm 0.11\\,\\m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.07726","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}