I=1/2  S-wave
preliminary scattering-amplitude poles

pole position (GeV)     origin
0.772 - 0.281 i
continuum
1.52 - 0.097 i
confinement (E0)
1.79 - 0.052 i
confinement (E1)
2.04 - 0.15 i
continuum
2.14 - 0.065 i
confinement (E2)

A impressão digital
de dispersão mesónica em   I=1/2  S-wave

Pole positions are model dependent.
However, GOOD models
will show reasonable agreement.