Zeitschrift für Physik C Particles and Fields

, Volume 1, Issue 3, pp 307–320 | Cite as

Glueball singularity, flavour loops and the Harari-Freund picture

  • P. Aurenche
  • L. González Mestres


We discuss several points concerning the structure of the cylinder term in the dual topological expansion. Using dual field theory as a guide, we concentrate on the possibility of a two-singularity scheme à la Harari-Freund. We start from results obtained previously at the lowest order in ϱ=N f /N c and study what can be the role of flavour-loop corrections in the real world where ϱ∼1. It is argued that, in spite of the actual value of ϱ, precise mechanisms exist which can weaken the role of the flavour-loop corrections in the kinematical region where “soft” dynamics dominates. We also claim that theS-matrix at largeN c (ϱ≈-0) incorporates already many realistic features, and we refute some objections recently raised against the Harari-Freund picture.


Field Theory Real World Elementary Particle Quantum Field Theory Lower Order 
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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • P. Aurenche
    • 1
  • L. González Mestres
    • 2
  1. 1.Centre de Physique ThéoriqueEcole PolytechniquePalaiseau CedexFrance
  2. 2.Theory DivisionCERNGenève 23Switzerland

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