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Spin control and structure of weak nucleon currents in A= 8, 12, 20 and 41

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Abstract

The β-ray angular distributions from purely spin aligned 12B and 12N were precisely remeasured using a further refined spin-manipulation technique. We determined the amount of a g-parity violating induced tensor form factor in a weak axial vector current as 2M fT/fA= +0.22 ± 0.05\ (stat.) ± 0.15\ (syst.) ± 0.05\ (theor.). The result is consistent with the theoretical prediction in the framework of which induced tensor form factor is proportional to u- and d-quark mass difference. To study the g-parity violation in weak nucleon current systematically, we have started to measure the alignment correlation terms of 8Li, 8B, 20F and 41Sc.

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Authors and Affiliations

  1. Department of Physics, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560, Japan

    K. Minamisono, T. Yamaguchi, K. Matsuta, T. Minamisono, T. Ikeda, Y. Muramoto, M. Fukuda & Y. Nojiri

  2. National Institute of Radiological Science, 4-9-1 Anagawa, Inage, Chiba, 263, Japan

    A. Kitagawa

  3. Department of Physics, Osaka Kyoiku University, Kashiwara, 582, Japan

    K. Koshigiri

  4. Department of Physics, Josai International University, 1 Gumyo, Togane, Chiba, 283, Japan

    M. Morita

Authors
  1. K. Minamisono
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  2. T. Yamaguchi
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  3. K. Matsuta
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  4. T. Minamisono
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  5. T. Ikeda
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  6. Y. Muramoto
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  7. M. Fukuda
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  8. Y. Nojiri
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  9. A. Kitagawa
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  10. K. Koshigiri
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  11. M. Morita
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Minamisono, K., Yamaguchi, T., Matsuta, K. et al. Spin control and structure of weak nucleon currents in A= 8, 12, 20 and 41. Hyperfine Interactions 120, 707–712 (1999). https://doi.org/10.1023/A:1017048312405

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