Search For C Violation Process η’→ηe~+e~- In Electromagnetic Interaction At BESⅢ

C parity is the symmetry of matter and antimatter.If the C parity is precisely conserved,there will be as much material and antimatter in the universe,but this is not the case.The study of C parity violation helps us understand the asymmetry of material antimatter in the universe today.In the weak interaction,the phenomenon of C parity violation has been discovered,and among the other three interactions,C parity has been regarded as a perfect symmetry.Physicists are still trying to do a more accurate test of C parity in the other three interactions.As early as 1965,Tsung-Dao Lee proposed a possible form of C parity damage in the electromagnetic interaction.However,due to the experimental data statistics at that time,it has not been effectively tested.The 1.3 billion J/ψ data collected on BESIII provides us with the possibility to test C parity on higher precision.In this article,based on the data of BESⅢ,η’→ηe+e-test in the process of C parity,and looking for possible other new physical mechanism.In order to avoid the possible influence of human factors,the blind analysis method was adopted.We select J/ψ→γη’,η’→ηe+e-as the signal channel.To reduce the systematic uncertainty,we select J/ψ→γη’,η’→ηπ+π-as the reference channel.Based on the monte carlo samples,we obtain a preliminray result on B(η’→ηe+e-)/B(η’→ηπ+π-)<2.8×10-5 at 90%confidence level.Not observed obvious signal of C failure process.With the approval of the referees,we’ll open the data’s signal region and get results based on the data.