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

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

S. Aoki,¹⁾ S.Y. Bahk,²⁾ K.S. Chung,³⁾ S.H. Chung,³⁾ H. Funahashi,⁴⁾ C.H. Hahn,⁵⁾ T. Hara,⁶⁾ S. Hirata,⁴⁾ K. Hoshino,¹⁾ M. Ieiri,⁷⁾ T. Iijima,⁴⁾ K. Imai,⁴⁾ Y. Itow,⁴⁾ T. Jin-ya,⁸⁾ M. Kazuno,⁸⁾ K. Kikuchi,⁹⁾ C.O. Kim,¹⁰⁾ D.C. Kim,³⁾ J.Y. Kim,¹¹⁾ K. Kodama,¹²⁾ Y. Maeda,¹³⁾ A. Masaike,⁴⁾ A. Masuoka,¹²⁾ Y. Matsuda,⁶⁾ C. Nagoshi,¹⁴⁾ M. Nakamura,¹⁾ S. Nakanishi,¹⁾ T. Nakano,⁴⁾ K. Nakazawa,¹⁵⁾ K. Niwa,¹⁾ H. Oda,¹²⁾ H. Okabe,¹⁶⁾ S. Ono,⁸⁾ R. Ozaki,¹⁵⁾ I.G. Park,³⁾ M.S. Park,³⁾ Y. Sato,⁹⁾ H. Shibuya,⁸⁾ H.M. Shimizu,⁴⁾ J.S. Song,³⁾ M. Sugimoto,¹³⁾ M. Tairadate,⁸⁾ H. Tajima,¹⁾ R. Takashima,¹⁷⁾ F. Takeutchi,¹⁸⁾ K.H. Tanaka,⁷⁾ M. Teranaka,¹⁹⁾ I. Tezuka,⁹⁾ H. Togawa,⁴⁾ N. Ushida,¹²⁾ T. Watanabe,¹⁹⁾ N. Yasuda,⁹⁾ J. Yokota¹⁶⁾ and C.S. Yoon³⁾

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

(Received February 24, 1992)

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.

URL : http://ptp.ipap.jp/link?PTP/89/493/
DOI : 10.1143/PTP.89.493

[ Full Text PDF : FREE ACCESS (678K) ] Citation: Plain Text BiBTeX EndNote(RIS) RSS

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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: U_nucl-Ξ( 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 × A^1/3 and a = 0.65 fm. The atomic level of the `1s' state in the <sup>12</sup>C + Ξ<sup>-</sup> system is shifted by a strong interaction between a Ξ<sup>-</sup> hyperon and <sup>12</sup>C 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 <sup>12</sup>C + Ξ<sup>-</sup> 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

   Taiichi Yamada and Kiyomi Ikeda

8. Progress of Theoretical Physics Supplement No. 185 (2010) pp. 72-105 :

   G-Matrix Approach to Hyperon-Nucleus Systems

   Yasuo Yamamoto, Toshio Motoba and Thomas A. Rijken

9. Progress of Theoretical Physics Supplement No. 185 (2010) pp. 152-196 :

   S = -2 Hypernuclear Structure

   Emiko Hiyama, Masayasu Kamimura, Yasuo Yamamoto, Toshio Motoba and Thomas A. Rijken

10. Progress of Theoretical Physics Supplement No. 185 (2010) pp. 335-343 :

    Experimental Study of Double-Λ Hypernuclei with Nuclear Emulsion

    Kazuma Nakazawa and Hitoshi Takahashi

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