A DIFFUSION CLOUD CHAMBER STUDY OF VERY SLOW MESONS. II. BETA DECAY OF THE MUON
C. P. Sargent, Marion C. Rinehart, Leon M. Lederman, Kenneth C. Rogers · 1955
The spectrum of electrons arising from the decay of the negative mu meson has been determined. The muons are arrested in the gas of a high pressure hydrogen filled diffusion cloud chamber. The momenta of the decay electrons are determined from their curvature in a magnetic field of 7750 gauss. The spectrum of 415 electrons has been analyzed according to the theory of Michel. The shape parameter, {rho}, is found to be 0.64 {plus_minus} .10. The significance of this result in terms of the beta interaction is discussed.