Observation of Coulomb-assisted nuclear bound state of \(\Xi^-\)-\(^{14}\)N system

• Published in: arXiv.org
• Main Authors: Hayakawa, S H, Agari, K, Ahn, J K, Akaishi, T, Akazawa, Y, Ashikaga, S, Bassalleck, B, Bleser, S, Ekawa, H, Endo, Y, Fujikawa, Y, Fujioka, N, Fujita, M, Goto, R, Han, Y, Hasegawa, S, Hashimoto, T, Hayakawa, T, Hayata, E, Hicks, K, Hirose, E, Hirose, M, Honda, R, Hoshino, K, Hoshino, S, Hosomi, K, Hwang, S H, Ichikawa, Y, Ichikawa, M, Imai, K, Inaba, K, Ishikawa, Y, Ito, H, Ito, K, Jung, W S, Kanatsuki, S, Kanauchi, H, Kasagi, A, Kawai, T, Kim, M H, Kim, S H, Kinbara, S, Kiuchi, R, Kobayashi, H, Kobayashi, K, Koike, T, Koshikawa, A, Lee, J Y, Ma, T L, Matsumoto, S Y, Minakawa, M, Miwa, K, Moe, A T, Moon, T J, Moritsu, M, Nagase, Y, Nakada, Y, Nakagawa, M, Nakashima, D, Nakazawa, K, Nanamura, T, Naruki, M, Nyaw, A N L, Ogura, Y, Ohashi, M, Oue, K, Ozawa, S, Pochodzalla, J, Ryu, S Y, Sako, H, Sato, S, Sato, Y, Schupp, F, Shirotori, K, Soe, M M, Soe, M K, Sohn, J Y, Sugimura, H, Suzuki, K N, Takahashi, H, Takahashi, T, Takeda, T, Tamura, H, Tanida, K, Theint, A M M, Tint, K T, Toyama, Y, Ukai, M, Umezaki, E, Watabe, T, Watanabe, K, Yamamoto, T O, Yang, S B, Yoon, C S, Yoshida, J, Yoshimoto, M, Zhang, D H, Zhang, Z
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 27.01.2021
• Subjects: Energy levels; Hybrid systems; Hypernuclei
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2010.14317

In an emulsion-counter hybrid experiment performed at J-PARC, a \(\Xi^-\) absorption event was observed which decayed into twin single-\(\Lambda\) hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as \(\Xi^{-} + ^{14}\)N\(\ \rightarrow\ ^{10}_\Lambda\)Be + \(^5_\Lambda\)He. For the binding energy of the \(\Xi^{-}\) hyperon in the \(\Xi^-\)-\(^{14}\)N system a value of \(1.27 \pm 0.21\) MeV was deduced. The energy level of \(\Xi^-\) is likely a nuclear \(1p\) state which indicates a weak \({\Xi}N\)-\(\Lambda\Lambda\) coupling.