Abstract
We evaluate the scattering amplitude at next-to-leading order in chiral perturbation theory. We discuss the conventional approach of the pseudoscalar Goldstone bosons (, K, ) only and an extension including explicit resonance fields. The contributions of these resonances saturate the low-energy constants at order E4. We present predictions for the scattering lengths and phase shifts of the low partial waves.
| Original language | English |
|---|---|
| Pages (from-to) | 3698-3701 |
| Number of pages | 4 |
| Journal | Physical Review D |
| Volume | 44 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1991 |
| Externally published | Yes |