Abstract
Different observers1 believe they have found evidence for the existence of charged particles whose mass amounts probably to about fifty times the electron mass. Furthermore these particles seem to behave according to the Bethe-Heitler theory.2
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J. C. Street and E. C. Stevenson, Bull. Am. Phys. Sue. 12, 13 (1937); S. H. Neddermeyer and C. D. Anderson, Phys. Rev. 51, 886 (1937).
H. Bethe and W. Heitler, Proc. Roy. Soc. A146, 83 (1934).
H. Yukawa. Proc. Phys. Math. Soc. Japan 17, 48 (1937).
N. Kemmer, Helv. Phys. Acta 10, 47 (1937).
E. C. G. Stueckelberg, Nature 137, 1032 (1936); CR. de la Soc. phys. etsc. nat. Geneve 53, 64 (1936); Helv, Phys. Acta 9, 389 and 533 (1936). The matrices A in this note are the A and the Ω matrices in the former theory. Instead of the conservation law of charge numbers the author introduced in these former publications a certain relationship between particles and their antiparticles.
6 See, for example, the different publications of the Leipzig Institute: S. Fluegge, Zeits. f. Physik 105, 522 (1937); H. Volz, Zeits. f. Physik 105, 537 (1937); H. Euler, Zeits. f. Physik 105, 553 (1937).
W. Pauli and V. Weisskopf, Helv. Phys. Acta 7, 709 (1934); W. Pauli, Ann. Inst. H. Poincaré p. 137 (1936).
G. Wentzel, Zeits. f. Physik 104, 34 (1936) has also introduced new particles, but he attributed to them a mass near that of the proton (Bose protons and Bose neutrons).
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(2009). On the existence of heavy electrons [38]. In: Lacki, J., Ruegg, H., Wanders, G. (eds) E.C.G. Stueckelberg, An Unconventional Figure of Twentieth Century Physics. Birkhäuser Basel. https://doi.org/10.1007/978-3-7643-8878-2_15
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