人们对重子的认识还是比较有限，许多基本的物理问题没有解决，理论预言的许多重子激发态没有找到，共振态的质量和宽度仍存在很大的不确定性，有些重子激发态的自旋宇称还没有确定，特别是超子激发态的实验数据非常少。利用BESIII实验上获取的100亿 J/psi和4.48亿 psi(2S)实验数据可以对Lambda,Sigma,Xi等超子激发态进行研究，通过J/psi（psi(2S)）衰变到K- Lambda Xi+,K- Sigma0 Xi+,n Ks Lambda, p ks Sigma,Lambda Lambdabar Omega等衰变过程可以寻找更多的超子激发态并测量它们的质量、宽度和衰变分支比，确定其自旋宇称等参数，改善超子重子激发态的数据质量，丰富重子谱。同时，实验结果与理论预言进行比较可以检验强相互作用QCD以及各种解释重子结构的理论模型，促进理论发展。

The studies on the baryon spectroscopy are relatively limited, and some fundamental physics problems have not been solved because of the low statistic of excited baryon states in experiment. Such as many theoretically predicted baryon states have not been found, the errors of the mass and width of some resonance are still very large, and the spin-parity of excited baryon states have not yet been determined. Based on ten billion J/psi and 448M psi(2S) events collected with BESIII detector at the BEPCII, we can study the properties of the excited states of hyperon, such as Lambda, Sigma, Xi and so on. And we also can search new excited baryon states and determine their mass, width, branching fraction and spin-parity through charmonium decaying into K- Lambda Xi+, K- Sigma0 Xi+, n Ks Lambda, p Ks Sigma, and Lambda Lambda-bar omega. The work will improve the data quality and the baryon spectrum. In addition, the comparison between experiment result and theoretical prediction can test QCD and other theory models, promote the development of theory.