Attempts at Understanding the Mass Spectra of Elementary Particles

  • G. Bisiacchi
  • C. Fronsdal
Conference paper
Part of the Acta Physica Austriaca book series (FEWBODY, volume 3/1966)


This report contains an account of some attempts to unfurl the intricacies of the mass spectrum of elementary particles. Although the discussion is limited to ideas that work, in the sense that they are not immediately refuted by experiments, we are not yet convinced that any of them are correct. We have gone off in several different directions; in some cases we have carried out enormous calculations. We hope that others may use the results to better advantage.


Lorentz Transformation Mass Operator Neutral Component Irreducible Operator Meson Representation 
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    C. Fronsdal, “Relativistic Symmetries” Proceedings of the Seminar on Elementary Particles and High Energy Physics, Trieste, 1965, published by IAEA, Vienna, 1965.Google Scholar
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    This corresponds to the case when ‘the mass operator is diagonal in the U-channel; see Appendix and ref. 3.Google Scholar
  7. 7.
    We use the same irreducible, unitary representations of SL(6,C) as in ref. 2.Google Scholar

Copyright information

© Springer-Verlag GmbH Wien 1966

Authors and Affiliations

  • G. Bisiacchi
    • 1
  • C. Fronsdal
    • 1
  1. 1.International Centre for Theoretical PhysicsTriesteItaly

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