Abstract
Three basic pionic amplitudes , (for ), and (for ) are calculated in a QCD-oriented Bethe-Salpeter model of hadrons which fits the spectra of all quarkonia. The results, MeV (experiment, 135), eV (7.9), and Ge (13±2), obtained with no free parameters, agree with the data and with the Wess-Zumino-Witten theory.
- Received 30 April 1987
DOI:https://doi.org/10.1103/PhysRevLett.59.2408
©1987 American Physical Society