Baryons studies at BESIII

Hyperons production and decays are studied with using 1310.6 × 106 J/ψ and 448.1 × 106 ψ(3686) events collected with the BESIII experiment. The recent achievements in BESIII are report. The spin polarization of Σ+ and Σ ‾ − is observed in J/ψ and ψ(3686) decays for the first time. The spin of Ω− is determined to be 3/2 unambiguously with helicity amplitude analysis method. The SU(3)-flavor violating decay J / ψ → Ξ ( 1530 ) − Ξ ‾ + + c.c. is studied with the evidence for the radiative decay Ξ(1530)− → γΞ− of a significance of 3.9σ. The branching fractions of the decays χ c J → Σ − Σ ‾ + are measured for the first time using the final states n n ‾ π + π − .