The Study Of Charmonium Decaying Into Ppπ~+π~-π~+π~-

To know the microworld deeply,we usually do the research by high energy physics experiment.Beijing electron position collider(BEPC)is used to study the particle physics in the π and charmonium regions. BEPC has achieved many international high energy physics results,such as measuring the π’s mass and so on. BESIII is a large magnetic spectrometer founded on BEPC.After upgrated,BESⅢ provides us a better condition to study the strong interaction and we can measure the branching ratios of charmonium decay much more exactly.In this paper,we study the charmonium decaying into the final states of ppπ+π-π+π-, Basing on the225M J/ψ and106M ψ(2S)event samples,we measure the branch-ing ratios of J/ψ�'(?)-(?)+、J/(?)�'(?)-(?)(1530)+、J/ψ�'(?)(1530)-(?)+、J/ψ�'∑(1385)-∑(1385)+、J/ψ�'∑(1385)+∑(1385)-and ψ(2S)�'(?)-(?)+、ψ(2S)�'∑(1385)-∑(1385)++c.c. In PDG,the branching ratio of J/ψ�'(?)-(?)(1530)+has not been measured. Using the measured branching ratios,we can test the QCD "12%"rule, The results are given as the following: Br(J/ψ�'(?)-(?)+)=(10.01±0.20±0.69)×10-4, Br(J/ψ�'(?)-(?)+(1530))=(1.49±0.21±0.13)×10-4, Br(J/ψ�'(?)-(?)+)=(10.16±0.28±0.72)×10-4, Br(J/ψ�'(?)-(1530)(?)+)=(1.55±0.36±0.26)×10-4, Br(J/ψ�'∑(1385)-∑(1385)+)=(9.77±0.39±0.78)×10-4, Br(J/ψ�'∑(1385)+∑(1385)-)=(9.73±0.57±1.13)×10-4, Br(ψ(2S)�'(?)-(?)+)=(3.56±0.21±0.23)×10-4, Br(ψ(2S)�'∑(1385)-∑(1385)+)=(1.05±0.21±0.08)×10-4, Br(ψ(2S)�'∑(1385)+∑(1385)-)=(1.60±0.31±0.52)×10-4, where the first error is statistical and the second one is systematic.