Abstract
It is shown that the Callan-Gross sum rules for electroproduction fail in perturbation theory. Nonperturbative lepton annihilation sum rules are derived. The inapplicability of perturbation theory is traced to the breakdown of the Johnson-Low-Bjorken high-energy theorem.
- Received 24 February 1969
DOI:https://doi.org/10.1103/PhysRevLett.22.975
©1969 American Physical Society
