Study of J/ψ → ωpp at BESIII.

The decay J/ψ →ωpp has been studied, using 225.3 X 106 J/ψ events accumulated at BESIH. No significant enhancement near the pp invariant-mass threshold [denoted as X(pp)] is observed. The upper limit of the branching fraction B ( J / ψ → ωX(pp) → ωpp) is determined to be 3.9 X 10-6 at the 95% confidence level. The branching fraction of J / ψ →ωpp is measured to be B ( J / ψ → ωpp) = (9.0 ± 0.2(stat) ± 0.9(syst)) x 10-4. [ABSTRACT FROM AUTHOR]