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Polarization Experiments in the Godfrey-Cycle

  • Laszlo Grenacs
Part of the Ettore Majorana International Science Series book series (volume 4)

Abstract

From the “new” experiments performed in the A = 12 mass multiplet, viz. i) beta-decay asymmetry of aligned 12B/12N mirror nuclei and ii) the average and longitudinal polarizations of 12B (g.s.) produced by μ-capture in 12C, we learned about the nature of weak interactions:
  • there are no second class axial-vector currents,

  • the weak magnetism is now verified in μ-capture,

  • -the helicity of the “muonic” neutrino is measured with good precision (≃ 10%) (the result agrees with the standard V-A scheme).

Keywords

Polarization Experiment Longitudinal Polarization Weak Magnetism Conserve Vector Current Recoil Polarization 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. [1]
    T.N.K. Godfrey, Thesis, Princeton University, 1954 (unpublished)Google Scholar
  2. [2]
    K. Koshigiri, Osaka preprint (1979, to be published in Nucl. Phys.)Google Scholar
  3. [3]
    C.S. Wu, Y.K. Lee and L.W. Mo, Phys. Rev. Letters 39 (1977) 72ADSCrossRefGoogle Scholar
  4. [4]
    W. Kaina, V. Soergel, H. Thies and W. Trost, Phys. Lett. 70B (1977) 411Google Scholar
  5. [5]
    M. Morita et al., Progr. Theor. Phys., Suppl. 60 (1976) 1ADSCrossRefGoogle Scholar
  6. [6]
    S. Weinberg, Phys. Rev. 112 (1958) 1375ADSMATHCrossRefGoogle Scholar
  7. [7]
    J H. Brändle et al., Phys. Rev. Letters 41 (1978) 299 (and references quoted therein); the fig. 1 is taken from the “extended” version of this reference (unpublished preprint)ADSCrossRefGoogle Scholar
  8. [8]
    A. Possoz et al., Phys. Lett. 70B (1977) 265 and A. Possoz, Thesis, Louvain 1978 (unpublished)ADSGoogle Scholar
  9. [9]
    Since Pav is a scalar, this is merely a convenient choiceGoogle Scholar
  10. [10]
    More recent calculations [M. Kobayashi et al., Nucl. Phys. A312 (1978) 377 and W.-Y. Hwang (preprint 1979)] yield Pav(1-) > 0. This affects the value of WM (μ)only very slightly, the value of (gp+gT)/gA becomes 10 ± 2.7 which is still compatible with the PCAC predictionADSGoogle Scholar
  11. [11]
    P. Truttmann et al., Phys. Lett. 83B (1979) 48Google Scholar

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • Laszlo Grenacs
    • 1
  1. 1.Institut de Physique CorpusculaireUniversité Catholique de LouvainLouvain-la-NeuveBelgium

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