Evidence for Axial-Vector and Pseudoscalar Resonances near 1.275 GeV in $η π^{+} π^{-}$

We present the first results from an isobar-model phase-shift analysis of the

η π^{+} π^{-}

system. The

D (1275)

meson is established as a narrow (

Γ \sim 10

MeV)

I J^{P} = 01^{+}

resonance. Beneath the

D

is a broader (

Γ \sim 70

MeV)

I J^{P} = 00^{-}

state which is a candidate for the radially excited

η

. The data are consistent with the existence of another 0

0^{-}

object of comparable width near 1.4 GeV.

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Evidence for Axial-Vector and Pseudoscalar Resonances near 1.275 GeV inηπ+π−