Evidence for a pi eta-P-wave in (p)over-barp-annihilations at rest into pi(0)pi(0)eta

A partial wave analysis is presented of two high-statistics data samples of protonium annihilation into pi(0)pi(0)eta in liquid and 12 arm gaseous hyd rogen. The contributions from the S-1(0), P-3(1) and P-3(2) initial atomic fine structure states to the two data sits are different. The change of the ir fractional contributions when going from liquid to gaseous H-2 as calcul ated in a cascade model is imposed in fitting the data. Thus the uncertaint y in the fraction of S-state and P-state capture is minimized. Both data se ts allow a description with a common set of resonances and resonance parame ters. The inclusion of a pi eta P-wave in the fit gives supportive evidence for the <(rho)over cap>(1405). with parameters compatible with previous fi ndings. (C) 1999 Elsevier Science B.V. All rights reserved.