Pion transitions and models of chiral symmetry
- 1 October 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 40 (7) , 2378-2388
- https://doi.org/10.1103/physrevd.40.2378
Abstract
We describe a set of pion-decay and scattering amplitudes which are described by only two low-energy parameters in the effective chiral Lagrangian of QCD. After a phenomenological analysis of the data, we demonstrate how the effective-Lagrangian framework correlates the many predictions of these reactions which have been made in the literature using a variety of models with chiral symmetry. A comparison with the data then also determines which model represents QCD. Not surprisingly, the winner is a form of vector dominance.Keywords
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