Rare Muon Decays and Lepton-Family Number Conservation

  • C. M. Hoffman
Part of the Ettore Majorana International Science Series book series (EMISS, volume 23)


The muon was discovered in cosmic radiation in 1937.1 For several years it was believed to be the meson of Yukawa’s theory that was the carrier of the strong nuclear force: its mass (105.5 MeV/c2) is deceptively close to Yukawa’s predicted meson mass. It was only after it was found that the muon did not interact strongly and another particle (the pi meson) did that the real puzzle presented itself: what role does the muon play? This mystery was succinctly expressed by Rabi: “The Muon, Who Ordered That?”


Gauge Boson Lepton Number Axial Magnetic Field Magnetic Spectrometer Muon Decay 
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Copyright information

© Plenum Press, New York 1985

Authors and Affiliations

  • C. M. Hoffman
    • 1
  1. 1.Los Alamos National LaboratoryLos AlamosUSA

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