Nature 142, 878-878 (12 November 1938) | doi:10.1038/142878c0

Mesotron (Intermediate Particle) as a Name for the New Particles of Intermediate Mass

CARL D. ANDERSON &  SETH H. NEDDERMEYER

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THE existence of particles intermediate in mass between protons and electrons has been shown in experiments on the cosmic radiation1. Since at present so little is known concerning the properties of these particles, for example, the exact value of the mass, the laws governing their production, their stability against disintegration, etc., it may yet be too early to assign to them a name. But inasmuch as several names have already been suggested, namely, dynatron, penetron, barytron, heavy electron, yukon and x-particle, it may be wise to consider the matter at this time.

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References

  1. For historical summary see Wentzel, G., Naturwiss., 26, 273 (1938); and Bowen, Millikan and Neher, footnote, Phys. Rev., 53, 219 (1938).