Asymmetry in the nonmesonic weak decay of polarized 5ΛHe hypernuclei

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

doi:10.1103/PhysRevLett.84.4052

Asymmetry in the nonmesonic weak decay of polarized ⁵ΛHe hypernuclei

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

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

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Abstract

We have measured the asymmetric emission of protons from the nonmesonic decay of polarized ⁵ΛHe produced by the (π+, K+) reaction. ⁵ΛHe is an s-shell hypernucleus and its polarization is due to the Λ. One expects to obtain direct information on the elementary weak Λ→ p → np process. The asymmetry parameter has been determined to be 0.24 ± 0.22. The implication of the result is discussed.

Original language	English
Pages (from-to)	4052-4055
Number of pages	4
Journal	Physical review letters
Volume	84
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.84.4052
Publication status	Published - 2000
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.84.4052

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Ajimura, S., Ikeda, K., Ishikawa, M., Kishimoto, T., Okusu, A., Shinkai, N., Tanaka, Y., Ejiri, H., Nakano, T., Manabe, K., Nagae, T., Noumi, H., Sekimoto, M., Shibata, T., Hashimoto, O., Maeda, K., Takahashi, T., Hasegawa, T., Bhang, H., ... Youn, M. (2000). Asymmetry in the nonmesonic weak decay of polarized ⁵ΛHe hypernuclei. Physical review letters, 84(18), 4052-4055. https://doi.org/10.1103/PhysRevLett.84.4052

Asymmetry in the nonmesonic weak decay of polarized ⁵ΛHe hypernuclei. / Ajimura, S.; Ikeda, K.; Ishikawa, M.; Kishimoto, T.; Okusu, A.; Shinkai, N.; Tanaka, Y.; Ejiri, H.; Nakano, T.; Manabe, K.; Nagae, T.; Noumi, H.; Sekimoto, M.; Shibata, T.; Hashimoto, O.; Maeda, K.; Takahashi, T.; Hasegawa, T.; Bhang, H.; Kim, Y. D.; Park, H.; Youn, M.

In: Physical review letters, Vol. 84, No. 18, 2000, p. 4052-4055.

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

Ajimura, S, Ikeda, K, Ishikawa, M, Kishimoto, T, Okusu, A, Shinkai, N, Tanaka, Y, Ejiri, H, Nakano, T, Manabe, K, Nagae, T, Noumi, H, Sekimoto, M, Shibata, T, Hashimoto, O, Maeda, K, Takahashi, T, Hasegawa, T, Bhang, H, Kim, YD, Park, H & Youn, M 2000, 'Asymmetry in the nonmesonic weak decay of polarized ⁵ΛHe hypernuclei', Physical review letters, vol. 84, no. 18, pp. 4052-4055. https://doi.org/10.1103/PhysRevLett.84.4052

Ajimura, S. ; Ikeda, K. ; Ishikawa, M. ; Kishimoto, T. ; Okusu, A. ; Shinkai, N. ; Tanaka, Y. ; Ejiri, H. ; Nakano, T. ; Manabe, K. ; Nagae, T. ; Noumi, H. ; Sekimoto, M. ; Shibata, T. ; Hashimoto, O. ; Maeda, K. ; Takahashi, T. ; Hasegawa, T. ; Bhang, H. ; Kim, Y. D. ; Park, H. ; Youn, M. / Asymmetry in the nonmesonic weak decay of polarized ⁵ΛHe hypernuclei. In: Physical review letters. 2000 ; Vol. 84, No. 18. pp. 4052-4055.

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abstract = "We have measured the asymmetric emission of protons from the nonmesonic decay of polarized 5ΛHe produced by the (π+, K+) reaction. 5ΛHe is an s-shell hypernucleus and its polarization is due to the Λ. One expects to obtain direct information on the elementary weak Λ→ p → np process. The asymmetry parameter has been determined to be 0.24 ± 0.22. The implication of the result is discussed.",

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AU - Ajimura, S.

AU - Ikeda, K.

AU - Ishikawa, M.

AU - Kishimoto, T.

AU - Okusu, A.

AU - Shinkai, N.

AU - Tanaka, Y.

AU - Ejiri, H.

AU - Nakano, T.

AU - Manabe, K.

AU - Nagae, T.

AU - Noumi, H.

AU - Sekimoto, M.

AU - Shibata, T.

AU - Hashimoto, O.

AU - Maeda, K.

AU - Takahashi, T.

AU - Hasegawa, T.

AU - Bhang, H.

AU - Kim, Y. D.

AU - Park, H.

AU - Youn, M.

PY - 2000

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AB - We have measured the asymmetric emission of protons from the nonmesonic decay of polarized 5ΛHe produced by the (π+, K+) reaction. 5ΛHe is an s-shell hypernucleus and its polarization is due to the Λ. One expects to obtain direct information on the elementary weak Λ→ p → np process. The asymmetry parameter has been determined to be 0.24 ± 0.22. The implication of the result is discussed.

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Asymmetry in the nonmesonic weak decay of polarized ⁵ΛHe hypernuclei

Abstract

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