Evidence for axial-vector and pseudoscalar resonances near 1. 275 GeV in eta. pi. /sup +/. pi. /sup -/

We present the first results from an isobar-model phase-shift analysis of the $\ensuremath{\eta}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ system. The $D(1275)$ meson is established as a narrow ($\ensuremath{\Gamma}\ensuremath{\sim}10$ MeV) $I{J}^{P}={01}^{+}$ resonance. Beneath the $D$ is a broader ($\ensuremath{\Gamma}\ensuremath{\sim}70$ MeV) $I{J}^{P}={00}^{\ensuremath{-}}$ state which is a candidate for the radially excited $\ensuremath{\eta}$. The data are consistent with the existence of another 0${0}^{\ensuremath{-}}$ object of comparable width near 1.4 GeV.