Helicity of the Electron and Positron in Muon Decay

Phys. Rev. 112, 2061 – Published 15 December 1958
Pierre C. Macq, Kenneth M. Crowe, and Roy P. Haddock


The helicity of the electron and positron from muon decay has been measured by determining the sense of circular polarization of their bremsstrahlung by the method of absorption in iron magnetized against or along the direction of motion of the particles. The positron is found to be right-handed and the electron left-handed.

The results are consistent with the two-component neutrino theory, which assumes (V, A) interaction, conservation of leptons, and left-handed neutrinos.

DOI: http://dx.doi.org/10.1103/PhysRev.112.2061

  • Received 29 August 1958
  • Published in the issue dated December 1958

© 1958 The American Physical Society

Authors & Affiliations

Pierre C. Macq*, Kenneth M. Crowe, and Roy P. Haddock

  • Radiation Laboratory, University of California, Berkeley, California

  • *On leave of absence from the University of Louvain, Belgium.

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