Study of Λ → NN process in polarized Λ5He

T. Kishimoto; S. Ajimura; H. Ejiri; K. Ikeda; M. Ishikawa; T. Nakano; A. Okusu; N. Shinkai; Y. Tanaka; T. Hasegawa; O. Hashimoto; T. Nagae; M. Sekimoto; T. Shibata; H. Noumi; K. Manabe; K. Maeda; T. Takahashi; H. Bhang; H. Park; M. Youn

doi:10.1016/0375-9474(94)00566-6

Study of Λ → NN process in polarized _Λ⁵He

T. Kishimoto, S. Ajimura, H. Ejiri, K. Ikeda, M. Ishikawa, T. Nakano, A. Okusu, N. Shinkai, Y. Tanaka, T. Hasegawa, O. Hashimoto, T. Nagae, M. Sekimoto, T. Shibata, H. Noumi, K. Manabe, K. Maeda, T. Takahashi, H. Bhang, H. ParkM. Youn

SCI - Physics

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Strangeness changing weak hyperon nucleon interaction is studied by observing the weak nonmesonic decay (NM-decay) of Λ hypernuclei (ΛN → NN). Observation of its branching ratios gave spin-isospin structure of the NM-decay. Recently we carried out the experiment to observe asymmetry of protons from the weak NM-decay of the polarized _Λ⁵He hypernucleus. The asymmetry is due to interference between amplitudes with different parities. It is shown that asymmetry parameter elucidates the dominant part of the NM-decay mechanism.

Original language	English
Pages (from-to)	205-210
Number of pages	6
Journal	Nuclear Physics, Section A
Volume	585
Issue number	1-2
DOIs	https://doi.org/10.1016/0375-9474(94)00566-6
Publication status	Published - 1995 Mar 13

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0375-9474(94)00566-6

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Kishimoto, T., Ajimura, S., Ejiri, H., Ikeda, K., Ishikawa, M., Nakano, T., Okusu, A., Shinkai, N., Tanaka, Y., Hasegawa, T., Hashimoto, O., Nagae, T., Sekimoto, M., Shibata, T., Noumi, H., Manabe, K., Maeda, K., Takahashi, T., Bhang, H., ... Youn, M. (1995). Study of Λ → NN process in polarized _Λ⁵He. Nuclear Physics, Section A, 585(1-2), 205-210. https://doi.org/10.1016/0375-9474(94)00566-6

Study of Λ → NN process in polarized _Λ⁵He. / Kishimoto, T.; Ajimura, S.; Ejiri, H.; Ikeda, K.; Ishikawa, M.; Nakano, T.; Okusu, A.; Shinkai, N.; Tanaka, Y.; Hasegawa, T.; Hashimoto, O.; Nagae, T.; Sekimoto, M.; Shibata, T.; Noumi, H.; Manabe, K.; Maeda, K.; Takahashi, T.; Bhang, H.; Park, H.; Youn, M.

In: Nuclear Physics, Section A, Vol. 585, No. 1-2, 13.03.1995, p. 205-210.

Research output: Contribution to journal › Article › peer-review

Kishimoto, T, Ajimura, S, Ejiri, H, Ikeda, K, Ishikawa, M, Nakano, T, Okusu, A, Shinkai, N, Tanaka, Y, Hasegawa, T, Hashimoto, O, Nagae, T, Sekimoto, M, Shibata, T, Noumi, H, Manabe, K, Maeda, K, Takahashi, T, Bhang, H, Park, H & Youn, M 1995, 'Study of Λ → NN process in polarized _Λ⁵He', Nuclear Physics, Section A, vol. 585, no. 1-2, pp. 205-210. https://doi.org/10.1016/0375-9474(94)00566-6

Kishimoto, T. ; Ajimura, S. ; Ejiri, H. ; Ikeda, K. ; Ishikawa, M. ; Nakano, T. ; Okusu, A. ; Shinkai, N. ; Tanaka, Y. ; Hasegawa, T. ; Hashimoto, O. ; Nagae, T. ; Sekimoto, M. ; Shibata, T. ; Noumi, H. ; Manabe, K. ; Maeda, K. ; Takahashi, T. ; Bhang, H. ; Park, H. ; Youn, M. / Study of Λ → NN process in polarized _Λ⁵He. In: Nuclear Physics, Section A. 1995 ; Vol. 585, No. 1-2. pp. 205-210.

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title = "Study of Λ → NN process in polarized Λ5He",

abstract = "Strangeness changing weak hyperon nucleon interaction is studied by observing the weak nonmesonic decay (NM-decay) of Λ hypernuclei (ΛN → NN). Observation of its branching ratios gave spin-isospin structure of the NM-decay. Recently we carried out the experiment to observe asymmetry of protons from the weak NM-decay of the polarized Λ5He hypernucleus. The asymmetry is due to interference between amplitudes with different parities. It is shown that asymmetry parameter elucidates the dominant part of the NM-decay mechanism.",

author = "T. Kishimoto and S. Ajimura and H. Ejiri and K. Ikeda and M. Ishikawa and T. Nakano and A. Okusu and N. Shinkai and Y. Tanaka and T. Hasegawa and O. Hashimoto and T. Nagae and M. Sekimoto and T. Shibata and H. Noumi and K. Manabe and K. Maeda and T. Takahashi and H. Bhang and H. Park and M. Youn",

note = "Funding Information: The authors are grateful to professors K. Nakai, T. Ohshima, T. Ohsuka and J. Chiba for supports to carry out the experiment. They thank professors T. Motoba, K. Itonaga and late H. Band5 for discussions related to polarization phenomena. T. K. is grateful to Yamada Science Foundation for financial support.",

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doi = "10.1016/0375-9474(94)00566-6",

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T1 - Study of Λ → NN process in polarized Λ5He

AU - Kishimoto, T.

AU - Ajimura, S.

AU - Ejiri, H.

AU - Ikeda, K.

AU - Ishikawa, M.

AU - Nakano, T.

AU - Okusu, A.

AU - Shinkai, N.

AU - Tanaka, Y.

AU - Hasegawa, T.

AU - Hashimoto, O.

AU - Nagae, T.

AU - Sekimoto, M.

AU - Shibata, T.

AU - Noumi, H.

AU - Manabe, K.

AU - Maeda, K.

AU - Takahashi, T.

AU - Bhang, H.

AU - Park, H.

AU - Youn, M.

N1 - Funding Information: The authors are grateful to professors K. Nakai, T. Ohshima, T. Ohsuka and J. Chiba for supports to carry out the experiment. They thank professors T. Motoba, K. Itonaga and late H. Band5 for discussions related to polarization phenomena. T. K. is grateful to Yamada Science Foundation for financial support.

PY - 1995/3/13

Y1 - 1995/3/13

N2 - Strangeness changing weak hyperon nucleon interaction is studied by observing the weak nonmesonic decay (NM-decay) of Λ hypernuclei (ΛN → NN). Observation of its branching ratios gave spin-isospin structure of the NM-decay. Recently we carried out the experiment to observe asymmetry of protons from the weak NM-decay of the polarized Λ5He hypernucleus. The asymmetry is due to interference between amplitudes with different parities. It is shown that asymmetry parameter elucidates the dominant part of the NM-decay mechanism.

AB - Strangeness changing weak hyperon nucleon interaction is studied by observing the weak nonmesonic decay (NM-decay) of Λ hypernuclei (ΛN → NN). Observation of its branching ratios gave spin-isospin structure of the NM-decay. Recently we carried out the experiment to observe asymmetry of protons from the weak NM-decay of the polarized Λ5He hypernucleus. The asymmetry is due to interference between amplitudes with different parities. It is shown that asymmetry parameter elucidates the dominant part of the NM-decay mechanism.

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JO - Nuclear Physics A

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ER -

Study of Λ → NN process in polarized _Λ⁵He

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