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## Prog. Theor. Phys. Vol. 89 No. 2 (1993) pp. 493-500

[ Full Text PDF : FREE ACCESS (678K) ]

# Production of Two Single-Λ Hypernuclei by Ξ- Capture

1)Department of Physics, Nagoya University, Nagoya 464-01
2)Wonkang University, Iri 570-749
3)Gyeongsang National University, Jinju 660-701
4)Department of Physics, Kyoto University, Kyoto 606-01
5)Changwon National University, Changwon 641-773
6)College of Liberal Arts, Kobe University, Kobe 657
7)KEK, National Laboratory for High Energy Physics, Tsukuba 305
8)Department of Physics, Toho University, Funabashi 274
9)Faculty of Education, Utsunomiya University, Utsunomiya 321
10)Korea University, Seoul 136-701
11)Chonnam National University, Kwangju 500-757
12)Aichi University of Education, Kariya 448
13)Faculty of Education, Yokohama National University, Yokohama 240
14)Institute for Nuclear Study, University of Tokyo, Tanashi 188
15)Physics Department, Gifu University, Gifu 501-11
16)Science Education Institute of Osaka Prefecture, Osaka 558
17)Kyoto University of Education, Kyoto 612
18)Faculty of Science, Kyoto Sangyo University, Kyoto 603
19)Department of Physics, Osaka City University, Osaka 558

### Abstract:

The S = -2 hypernuclear states formed through (K-, K+) reactions have been studied by using the 1.66 GeV/c K- beam provided by KEK Proton Synchrotron. Investigation has been done on the stars due to the capture of the Ξ- hyperons at rest in nuclear emulsion, which hyperons were produced in (K-, K+) reactions. We observed a clear case of an absorption of Ξ- hyperon at rest by a nucleus followed by a back-to-back emission of two single-Λ hypernuclei.

DOI : 10.1143/PTP.89.493

[ Full Text PDF : FREE ACCESS (678K) ] Citation:

### References:

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13. The level energies and widths of both the 12C + Ξ- and 12B + Ξ0 systems are calculated by Akaishi with the use of a nucleus-Ξ potential of Woods-Saxon type as follows: Unucl( r) = - \frac{{\it V}_{0} + {\it iW}_{0}}{1 + exp\{({\it r-R})/{\it a}\}}, where V0 = 24 MeV, W0 = 3 MeV, R = 1.1 × A1/3 and a = 0.65 fm. The atomic level of the 1s' state in the 12C + Ξ- system is shifted by a strong interaction between a Ξ- hyperon and 12C nuclei. This 1s' atomic state is -0.55 (Γ = 0.1) MeV. The 0s nuclear state in the 12B + Ξ0 system is very close to the 1s' atomic state and lies under the threshold of the 12C + Ξ- system by -0.47 (Γ = 3.7) MeV. Therefore, there is a possibility of the mixing of the 1s' atomic state in the 12C + Ξ- system and the 0s nuclear state in the 12B + Ξ0 system.
14. S. Aoki et al., to be submitted to Prog. Theor. Phys.

### Citing Article(s) :

1. Progress of Theoretical Physics Vol. 102 No. 1 (1999) pp. 89-119 :
Quantum Fluctuation Effects on Hyperfragment Formation from Ξ- Absorption at Rest on 12C
Yuichi Hirata, Yasushi Nara, Akira Ohnishi, Toru Harada and Jørgen Randrup
2. Progress of Theoretical Physics Vol. 105 No. 4 (2001) pp. 627-648 :
ΞN and ΞΞ OBEP and Ξ--Nucleus Bound States
Masahiro Yamaguchi, Kouji Tominaga, Yasuo Yamamoto and Tamotsu Ueda
3. Progress of Theoretical Physics Vol. 106 No. 2 (2001) pp. 363-372 :
Ξ- Emission Probabilities at (K-,K+) Reaction Points and the ΞN Interaction
Yasuo Yamamoto, Toru Tamagawa, Tomokazu Fukuda and Toshio Motoba
4. Progress of Theoretical Physics Supplement No.117 (1994) pp. 265-279 :
Formation and Fragmentation of Double-Λ Compound Nucleus
Yasuo Yamamoto, Mitsuo Sano and Masamichi Wakai
5. Progress of Theoretical Physics Supplement No.117 (1994) pp. 281-306 :
Formation and Transition of Strangeness = -2 Nuclear Systems
Yasuo Yamamoto, Toshio Motoba, Tomokazu Fukuda, Miho Takahashi and Kiyomi Ikeda
6. Progress of Theoretical Physics Supplement No.117 (1994) pp. 307-324 :
Widths of Ξ Hypernuclear States
D. J. Millener, C. B. Dover and A. Gal
7. Progress of Theoretical Physics Supplement No.117 (1994) pp. 445-460 :
Hypernuclei and Deep Hole States