Abstract
In this talk, I will report recent results from BESIII Collaboration. (1) The χcJ decay into π0π0, ηη and γV(V = ρ,ω,ϕ) are presented and compared with that of theory calculation. (2) The first observation of χc1 → ϕ ϕ and ωω is displayed. Doubly OZI suppressed decay of χcJ → ωϕ are observed for the first time. (3) The mass and decay of hc(1P1) is important to learn about hyperfine(spin-spin) interaction of P wave states, and the hyperfine or triplet-singlet splitting determined by spin-spin term in QCD potential models. The mass and width of hc are measured, and Br(hc → γηc) are firstly obtained. Some results are also compared with theory prediction. (4) In order to study nature of light scalar meson a0 and f0, The J/ψ → ϕf0 → ϕa0 → ϕηπ and χc1 → aπ00 → f0π0 → π+π−π0 are performed. (5) The result of X(1835) in the η′π+π− are also shown, the possibility that there are two new resonances is under further study.
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