Abstract
On the basis of the current-field-identity relation, a unified treatment and quantitatively successful calculation of pion production by mesons and photons is presented. The model, which is independent of free parameters, explains the empirically established facts about strong mass dependences in the density matrix elements (in particular, also in the combination ) considered as a function of the mass of the meson. These facts have been the basis for a recent criticism of the vector-meson-dominance hypothesis in pion production. But our results indicate that the current-field-identity relation is not in conflict with experiment. We emphasize in our discussion that no model-independent formulation of vector-meson dominance is possible in pion production, according to our present knowledge.
- Received 1 August 1969
DOI:https://doi.org/10.1103/PhysRev.188.2458
©1969 American Physical Society