Abstract
The current commutation and partially conserved axial-vector current (PCAC) allow the calculation of the matrix elements for emission and absorption of any number of soft and, therefore, in particular, determine the scattering length of a pion on any target particle. In this note we give a simple formula for pion scattering on any particle but a , and then extend this result to the more difficult case of pion-pion scattering.
- Received 20 June 1966
DOI:https://doi.org/10.1103/PhysRevLett.17.616
©1966 American Physical Society