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The decay channel J/\psi->gamma omega omega, omega -> pi+ pi- pi0 is analyzedusing a sample of 5.8x10^7 J/psi events collected with the BESII detector. Theomega omega invariant mass distribution peaks at 1.76 GeV/c^2, just above theomega omega threshold. Analysis of angular correlations indicate that the omegaomega system below 2 GeV/c^2 is predominantly pseudoscalar. A partial waveanalysis confirms the predominant pseudoscalar structure, together with small0^{++} and 2^{++} contributions, and yields a pseudoscalar mass M = 1744 \pm 10(stat) \pm 15 (syst) MeV/c^2, a width Gamma = 244^{+24}_{-21} (stat) \pm 25(syst) MeV/c^2, and a product branching fraction Br(J/psi-> gamma eta(1760))\cdot Br(\eta(1760)->omega omega) = (1.98 \pm 0.08 (stat) \pm 0.32 (syst)) x10^{-3}.Comment: 18 pages, 5 figures, submit to PR

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Pseudoscalar production at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ω</mml:mi><mml:mi>ω</mml:mi></mml:math>threshold in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:mo>→</mml:mo><mml:mi>γ</mml:mi><mml:mi>ω</mml:mi><mml:mi>ω</mml:mi></mml:math>

Pseudoscalar production atωωthreshold inJ/ψ→γωω