Massless Particles and Analytic Continuation in Mass

  • A. O. Barut
Conference paper
Part of the Acta Physica Austriaca book series (FEWBODY, volume 6/1969)


The fundamental importance of the massless particles in physics is seen from the fact that almost all known interactions are dominated by a massless particle (with an extrapolation to soft mesons (m→o) in the case of strong interactions) (Table 1).


Analytic Continuation Gauge Condition Massless Particle Pole Term Subsidiary Condition 
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Copyright information

© Springer-Verlag / Wien 1969

Authors and Affiliations

  • A. O. Barut
    • 1
    • 2
  1. 1.University of ColoradoBoulderUSA
  2. 2.International Centre for Theoretical PhysicsTriesteItaly

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