A 2.25×10 8 J/ψ event sample accumulated with the BESIII detector is used to study the doubly OZI... more A 2.25×10 8 J/ψ event sample accumulated with the BESIII detector is used to study the doubly OZI suppressed decay modes J/ψ → γωφ, ω → π + π − π 0 , φ → K + K − . A strong deviation (> 30σ) from three-body J/ψ → γωφ phase space is observed near the ωφ mass threshold that is consistent with a previous observation reported by the BESII experiment. A partial wave analysis with a tensor covariant amplitude that assumes that the enhancement is due to the presence of a resonance, the X(1810), is performed, and confirms that the spin-parity of the X(1810) is 0 ++ . The mass and width of the X(1810) are determined to be M = 1795 ± 7(stat) +13
A 2.25×10 8 J/ψ event sample accumulated with the BESIII detector is used to study the doubly OZI... more A 2.25×10 8 J/ψ event sample accumulated with the BESIII detector is used to study the doubly OZI suppressed decay modes J/ψ → γωφ, ω → π + π − π 0 , φ → K + K − . A strong deviation (> 30σ) from three-body J/ψ → γωφ phase space is observed near the ωφ mass threshold that is consistent with a previous observation reported by the BESII experiment. A partial wave analysis with a tensor covariant amplitude that assumes that the enhancement is due to the presence of a resonance, the X(1810), is performed, and confirms that the spin-parity of the X(1810) is 0 ++ . The mass and width of the X(1810) are determined to be M = 1795 ± 7(stat) +13
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