Abstract

Based on the 225 million J/ψ. and 106 million ψ′ events collected at BESIII, recent results on the meson spectroscopy are reported. The p̄p mass threshold enhancement is confirmed and the partial wave analysis is performed in the process J/ψ(ψ′) → γp̄p. X(1835) is confirmed and two new structures are found in J/ψ → γη′π+π−. Other results include a new structure X(1870) in J/ψ → ωη′π+π−, a0(980) and f0(980) mixing, isospin-violating decay model of η(1405) → f0(980)π0, ωφ threshold enhancement in J/ψ → γωφ and the preliminary partial wave analysis of J/ψ → γηη.

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