Direct Observation of Sequential Weak Decay of a Double Hypernucleus

S. Aoki; S. Y. Bahk; K.S. Chung; S.H. Chung; H. Funahashi; C. Hahn; T. Hara; S. Hirata; K. Hoshino; M. Ieiri; T. Iijima; K. Imai; T. Ishigami; Y. Itow; M. Kazuno; K. Kikuchi; C. O. Kim; D.C. Kim; J. Y. Kim; M. Kobayashi; K. Kodama; Y. Maeda; A. Masaike; A. Masuoka; Y. Matsuda; C. Nagoshi; Mitsuhiro Nakamura; S. Nakanishi; T. Nakano; K. Nakazawa; K. Niwa; Hirohisa Oda; H. Okabe; Shunsuke Ono; R. Ozaki; I. G. Park; Yoshihiro Sato; H. Shibuya; Hirohiko M. Shimizu; J. Song; M. Sugimoto; H. Tajima; R. Takashima; F. Takéutchi; К. Таnака; M. Teranaka; I. Tezuka; M. Togawa; N. Ushida; Shuji Watanabe; Tetsuyou Watanabe; J. Yokota; C.S. Yoon

doi:10.1143/ptp.85.1287

Direct Observation of Sequential Weak Decay of a Double Hypernucleus

S. Aoki(Nagoya University), S. Y. Bahk(Wonkwang University), K.S. Chung(Gyeongsang National University), S.H. Chung(Gyeongsang National University), H. Funahashi(Kyoto University), C. Hahn(Changwon National University), T. Hara(Kobe University), S. Hirata(Kyoto University), K. Hoshino(Nagoya University), M. Ieiri(High Energy Accelerator Research Organization), T. Iijima(Kyoto University), K. Imai(Kyoto University), T. Ishigami(Toho University), Y. Itow(Kyoto University), M. Kazuno(Toho University), K. Kikuchi(Utsunomiya University), C. O. Kim(Korea University), D.C. Kim(Gyeongsang National University), J. Y. Kim(Chonnam National University), M. Kobayashi(Toho University), K. Kodama(Aichi University of Education), Y. Maeda(Yokohama National University), A. Masaike(Kyoto University), A. Masuoka(Aichi University of Education), Y. Matsuda(Kobe University), C. Nagoshi(The University of Tokyo), Mitsuhiro Nakamura(Nagoya University), S. Nakanishi(Nagoya University), T. Nakano(Kyoto University), K. Nakazawa(Gifu University), K. Niwa(Nagoya University), Hirohisa Oda(Aichi University of Education), H. Okabe(Osaka Prefectural Education Center), Shunsuke Ono(Toho University), R. Ozaki(Gifu University), I. G. Park(Gyeongsang National University), Yoshihiro Sato(Utsunomiya University), H. Shibuya(Toho University), Hirohiko M. Shimizu(Kyoto University), J. Song(Gyeongsang National University), M. Sugimoto(Yokohama National University), H. Tajima(Nagoya University), R. Takashima(Kyoto University of Education), F. Takéutchi(Kyoto Sangyo University), К. Таnака(High Energy Accelerator Research Organization), M. Teranaka(Osaka City University), I. Tezuka(Utsunomiya University), M. Togawa(Kyoto University), N. Ushida(Aichi University of Education), Shuji Watanabe(Toho University), Tetsuyou Watanabe(Osaka City University), J. Yokota(Osaka Prefectural Education Center), C.S. Yoon(Gyeongsang National University)

Progress of Theoretical Physics

June 1, 1991

10.1143/ptp.85.1287

Cited by 283Open Access

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Abstract

We have studied stars in nuclear emulsion due to the capture at rest of the Ξ- hyperons produced in the (<it>K</it>-, <it>K</it>+) reaction. The sequential weak decay of a double hypernucleus (nucleus with <it>S</it> = -2) has been directly observed. The double hypernucleus is assigned as either 10<inf>ΛΛ</inf>Be or 13<inf>ΛΛ</inf>B. This assignment excludes the existence of the <it>H</it> dibaryon lighter than 2203.7 ±0.7 MeV/c2.

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