Abstract
Some comparisons with experiment of the hard-pion three-point functions obtained from current algebra are given. Available experimental data involving , , , and mesons are examined. The hard-pion current-algebra method is used to calculate the decays , , and , and the electromagnetic form factor of the pion. Peripheral processes such as are also examined as a test of meson-vertex functions for spacelike momentum transfers. Here, to reproduce correctly the momentum-transfer dependence at the nucleon vertex, a new extrapolation for the pionic nucleon form factor is introduced, using the Goldberger-Treiman relation. The results of the above calculations are found to be consistent with the present experimental situation. Current-algebra predictions for the cross section and the decays and are given. A cross section of about 0.1 μb is obtained for the photoproduction, which is on the verge of being detectable.
- Received 10 June 1968
DOI:https://doi.org/10.1103/PhysRev.174.2008
©1968 American Physical Society