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  1. University of Mandalay
  2. Department of Physics

The first evidence of a deeply bound state of Xi−–14N system

http://hdl.handle.net/20.500.12678/0000000954
http://hdl.handle.net/20.500.12678/0000000954
da3b40b0-3411-4101-a1f2-e21dbbb61894
c9139db0-87dd-4464-867d-4be50ae4b499
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The The first evidence of a deeply bound state.pdf (3373 Kb)
Publication type
Journal article
Upload type
Publication
Title
Title The first evidence of a deeply bound state of Xi−–14N system
Language en
Publication date 2015
Authors
Nakazawa, K.
Endo, Y.
Fukunaga, S.
Hoshino, K.
Hwang, S. H.
Imai, K.
Ito, H.
Itonaga, K.
Kanda, T.
Kawasaki, M.
Kim, J. H.
Kinbara, S.
Kobayashi, H.
Mishina, A.
Ogawa, S.
Shibuya, H.
Sugimura, T.
Myint Kyaw Soe
Takahashi, H.
Takahashi, T.
Khin Than Tint
Umehara, K.
Yoon, C. S.
Yoshida, J.
Description
We have observed a deeply bound state of the Ξ−–14N system that decayed into twin single-hypernuclei in nuclear emulsion exposed in the E373 experiment at KEK-PS. The process is uniquely identified as Ξ−+14N→10ΛBe+5ΛHe⁠. We have measured the binding energy of the Ξ−–14N system, BΞ−⁠, to be 4.38±0.25MeV, which is significantly larger than that of the Ξ−–14N 3D atomic state (0.17 MeV), if both single-hypernuclei are emitted in the ground state from at-rest capture of a Ξ− hyperon. If the 10ΛBe nucleus is produced in an excited state, the BΞ− value mentioned above decreases by the excitation energy. Model calculations based on known values for 9Be excited states have predicted two excited states in the bound region. Even in the case of 10ΛBe production in the highest excited state, the BΞ− value is far from the 3D atomic level of the Ξ−–14N system by more than 3.7 standard deviations. The event provides the first clear evidence of a deeply bound state of the Ξ−–14N system by an attractive ΞN interaction.
Keywords
deeply bound state
Identifier https://umoar.mu.edu.mm/handle/123456789/381
Journal articles
3
Progress of Theoretical and Experimental Physics
2015
Conference papaers
Books/reports/chapters
Thesis/dissertations
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