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Emulsion Scanning System for Searching Double-strangeness Nuclei

Authors
Sohn, Jong YoonYoon, Chun Sil
Issue Date
Nov-2023
Publisher
Korean Physical Society
Keywords
J-PARC E07; Nuclear emulsion; S = −2 nuclei
Citation
New Physics: Sae Mulli, v.73, no.11, pp 929 - 933
Pages
5
Indexed
SCOPUS
KCI
Journal Title
New Physics: Sae Mulli
Volume
73
Number
11
Start Page
929
End Page
933
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/68833
DOI
10.3938/NPSM.73.929
ISSN
0374-4914
2289-0041
Abstract
A nuclear emulsion system is a very suitable detector for recognizing very short tracks (∼several µm) of S = −2 nuclei, such as double-Λ hypernuclei, twin-Λ hypernuclei, and Ξ- hypernuclei, because of its submicron spatial resolution. The S = −2 nuclei can provide special experimental information on the Λ-Λ and Ξ--N interactions in the nuclei. The attribute of the S = −2 nuclei is their three vertices around the Ξ- stopping points. The Ξ- hyperons are generated from the quasi-free 'p'(K-, K+)Ξ- reactions. By following the Ξ- tracks plate by plate and observing the Ξ- capture points carefully in the emulsion, S = −2 nuclei can be found. In this work, two methods for emulsion scanning developed to search for S = −2 nuclei are presented, namely, the “track following method” and the “overall scanning method”, as well as the recent results of the event analysis. © 2023 The Korean Physical Society. All rights reserved.
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