Abstract
The inverse amplitude method is used to unitarize the two-loop ππ scattering amplitudes of SU(2) chiral perturbation theory in the and channels. An error analysis in terms of the low energy one-loop parameters and existing experimental data is undertaken. A comparison to standard resonance saturation values for the two-loop coefficients is also carried out. Crossing violations are quantified and the convergence of the expansion is discussed.
- Received 10 September 2001
DOI:https://doi.org/10.1103/PhysRevD.65.036002
©2002 American Physical Society