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 hydrogen. 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 their fractional contributions when going from liquid to gaseous H-2 as calculated in a cascade model is imposed in fitting the data. Thus the uncertainty in the fraction of S-state and P-state capture is minimized. Both data sets allow a description with a common set of resonances and resonance parameters. 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 findings. (C) 1999 Elsevier Science B.V. All rights reserved.