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The Mass of the Mesotron as Determined by Cosmic-Ray Measurements
Phys. Rev. 71, 387 – Published 1 April, 1947
DOI: https://doi.org/10.1103/PhysRev.71.387
Abstract
All quantitative determinations of the masses of individual cosmic-ray mesotrons have been based on cloud-chamber photographs involving measurements of magnetic curvature plus ionization density, range, or energy of knock-on electrons. The errors involved in the different methods are discussed as well as the possibility of reducing these errors by the choice of experimental conditions. The errors and the mass values themselves of 47 published measurements are reviewed in the light of the discussion. The great majority of the results are statistically reconcilable with a single mass; only a very small fraction of the mesotrons seem to have significantly different masses.
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