Communications in Mathematical Physics

, Volume 97, Issue 4, pp 569–582 | Cite as

Relation between effective couplings for asymptotically free models

  • Reinhard Oehme
  • Wolfhart Zimmermann


For asymptotically free models with two independent couplings asymptotic expansions are constructed which express one effective coupling in terms of the other. The expansions involve powers (including fractional or irrational exponents) and logarithms. All orders of theβ-functions are taken into account. The expansions found are complete in the sense that they represent solutions (exact to any order) which generalize all the solutions obtained with theβ-functions approximated to second order. It is shown that higher orders are relevant since it is not possible in general to reparametrize the system such that theβ-functions become polynomials of the coupling parameters. The simplifications in case of supersymmetric models are discussed.


Neural Network Statistical Physic Complex System Nonlinear Dynamics Asymptotic Expansion 
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Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • Reinhard Oehme
    • 1
  • Wolfhart Zimmermann
    • 2
  1. 1.The Enrico Fermi Institute and the Department of PhysicsThe University of ChicagoChicagoUSA
  2. 2.Max-Planck-Institut für Physik und AstrophysikWerner-Heisenberg-Institut für PhysikMünchenGermany

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