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The cross sections of the pd -> 3He eta, pd -> 3He pi0 pi0 pi0 and pd -> 3Hepi+ pi- pi0 reactions have been measured at beam kinetic energies T_p= 1360 MeVand T_p= 1450 MeV using the CELSIUS/WASA detector setup. At both energies, thedifferential cross section dsigma/dOmega of the eta meson in the pd -> 3He etareaction shows a strong forward-backward asymmetry in the CMS. The ratiobetween the pd -> 3He pi+ pi- pi0 and the pd -> 3He pi0 pi0 pi0 cross sectionshas been analysed in terms of isospin amplitudes. The reconstructed invariantmass distributions of the pi-pi, 3He-pi and 3He-2pi systems provide hints onthe role of nucleon resonances in the 3pi production process.

Production of eta and 3pi mesons in the pd->3HeX reaction at 1360 and 1450 MeV