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Photo of Johan Bijnens

Johan Bijnens

Professor

Photo of Johan Bijnens

Chiral perturbation theory for anomalous processes

Author

  • J. Bijnens
  • A. Bramon
  • F. Cornet

Summary, in English

A general expression containing all the divergences in Chiral Perturbation Theory at one loop for anomalous processes has been calculated. The nonrenormalization of some amplitudes (Adler-Bardeen theorem) is observed. The different types of corrections are identified. The contributions from vector meson exchange are determined for all anomalous processes. Explicit cancellation of divergences is shown for π0, η and η′ decays to γγ*. The dependence on the γ* mass squared is predicted to be essentially the same for all the three processes. It proceeds mainly through the VMD estimate of the finite parts of the next order Lagrangian and compares reasonably well with the available experimental data.

Publishing year

1990-12-01

Language

English

Pages

599-607

Publication/Series

Zeitschrift für Physik C Particles and Fields

Volume

46

Issue

4

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0170-9739