@article{24eaf9e2958f410da744156e6d326353,
title = "First observation of a nuclear s-state of a Ξ hypernucleus, 15ΞC",
abstract = "Bound systems of Ξ- -14N are studied via Ξ- capture at rest followed by emission of a twin single-Λ hypernucleus in the emulsion detectors. Two events forming extremely deep Ξ- bound states were obtained by analysis of a hybrid method in the E07 experiment at J-PARC and reanalysis of the E373 experiment at KEK-PS. The decay mode of one event was assigned as Ξ- +14N → 5λHe +5λHe +4He + n. Since there are no excited states for daughter particles, the binding energy of the Ξ- hyperon, BΞ-, in the 14N nucleus was uniquely determined to be 6.27 ± 0.27MeV. Another Ξ- -14N system via the decay 9 λBe +5λHe + n brings a BΞ- value, 8.00 ± 0.77MeV or 4.96 ± 0.77MeV, where the two possible values of BΞ- correspond to the ground and the excited states of the daughter 9λ Be nucleus, respectively. Because the BΞ- values are larger than those of the previously reported events (KISO and IBUKI), which are both interpreted as the nuclear 1p state of the Ξ-14Nsystem, these newevents give the first indication of the nuclear 1s state of the Ξ hypernucleus, 15ΞC.",
author = "M. Yoshimoto and Ahn, {J. K.} and B. Bassalleck and H. Ekawa and Y. Endo and M. Fujita and Y. Han and T. Hashimoto and Shuhei Hayakawa and K. Hicks and K. Hoshino and S. Hoshino and Hwang, {S. H.} and Y. Ichikawa and M. Ichikawa and K. Imai and Y. Ishikawa and H. Kanauchi and A. Kasagi and Kim, {S. H.} and S. Kinbara and Lin, {P. M.} and Ma, {T. L.} and K. Miwa and Moe, {A. T.} and Y. Nagase and K. Nakazawa and T. Nanamura and M. Naruki and Nyaw, {A. N.L.} and J. Pochodzalla and H. Sako and S. Sato and Soe, {M. M.} and Soe, {M. K.} and Sohn, {J. Y.} and H. Takahashi and T. Takahashi and H. Tamura and K. Tanida and Theint, {A. M.M.} and Tint, {K. T.} and M. Ukai and Yamamoto, {T. O.} and Yang, {S. B.} and Yoon, {C. S.} and J. Yoshida and Zhang, {D. H.} and Z. Zhang",
note = "Funding Information: We thank the KEK staff for the E373 experiment. We also thank the staff of the J-PARC accelerator and the Hadron experimental facility, FUJIFILM Corporation, KEK computing research, NII for SINET5, Kamioka Observatory, ICRR for the E07 experiment. We thank E. Hiyama for the useful discussion on the interpretation. This work was supported by Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Numbers JP23224006, JP16H02180, JP20H00155, JP20J00682; Ministry of Education, Culture, Sports, Science and Technology (MEXT) KAKENHI Grant Numbers JP15001001, JP24105002, JP18H05403, JP19H05147; and the National Research Foundation (NRF) of Korea with Grant Number 2018R1A2B2007757. J.P. is supported by Deutscher Akademischer Austauschdienst (DAAD) Grant numbers PPP Japan 2017, No. 57345296 by DE/Federal Republic of Germany, and Grant agreement STRONG 2020, No. 824093 by the European Union. Publisher Copyright: {\textcopyright} 2021 The Author(s). Published by Oxford University Press on behalf of the Physical Society of Japan.",
year = "2021",
month = jul,
day = "1",
doi = "10.1093/ptep/ptab073",
language = "English",
volume = "2021",
journal = "Progress of Theoretical and Experimental Physics",
issn = "2050-3911",
publisher = "Oxford University Press",
number = "7",
}