Abstract
The CERN phase-shift analysis is used to evaluate the left-cut term of the partial wave of pion-nucleon scattering. The inelastic equation is solved with this term and the elasticity as input. The output and input phase shifts agree below 2 BeV if and only if at least two Castillejo-Dalitz-Dyson poles are included in the canonical function. This result rules out single-channel bootstrap models and furnishes a constraint on many-channel models.
- Received 16 January 1969
DOI:https://doi.org/10.1103/PhysRevLett.22.1081
©1969 American Physical Society