Abstract
We set up a general framework to describe ππ scattering below 1 GeV based on chiral low-energy expansion with possible spin-0 and -1 resonances. Partial wave amplitudes are obtained with the N/D method, which satisfy unitarity, analyticity, and approximate crossing symmetry. A comparison with the phase shift data in the J=0 channel favors a scalar resonance near the ρ mass.
| Original language | English |
|---|---|
| Article number | 034005 |
| Pages (from-to) | 1-9 |
| Number of pages | 9 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 59 |
| Issue number | 3 |
| Publication status | Published - 1999 Feb 1 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)