Letter | Published:

Does the Mesotron Obey Bose-Einstein or Fermi-Dirac Statistics?

Nature volume 145, page 69 (13 January 1940) | Download Citation



WHETHER the mesotron obeys Bose-Einstein or Fermi-Dirac statistics is closely associated with what one assumes regarding the nature of the field, emission and absorption of which by the heavy particle is responsible for the interaction between elementary nuclear particles. If the field be a one-particle field, as postulated by Yukawa1, the mesotron obeys Bose-Einstein statistics, and has a spin equal to unity (All momenta are expressed in units of ħ.) However, in view of the fact that all known elementary particles obey Fermi-Dirac statistics and possess a spin ½, one is rather reluctant to accept, unless experimental evidence points. that way, that the mesotron obeys Bose-Einstein statistics and has a spin equal to unity. If we could suppose that the field involved is a two-particle field instead of a one-particle one, Fermi-Dirac statistics and a spin of ½ could be attributed to the particle concerned. So we suppose that the mesotron is emitted or absorbed by a heavy particle always in conjunction with a neutrino or an antineutrino.

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  1. 1.

    , Proc. Phys. Math. Soc. Japan, 1748 (1935).

  2. 2.

    , and , Phys. Rev., 50, 806 (1936); 53, 239 (1938)

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  1. Physics Department, University of the Punjab, Lahore.

    • P. L. KAPUR


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