Measurements Of Cross Section For E~+e~-??? Production With Data Points Of 3.773-4.600 GeV At BES?

Since the discovery of X(3872)by the Belle experiments in 2003,a series charmonium-like states have been observed by BaBar,Belle,CLEO and BES? experiments via the e+e-collision.For example:The Belle Collaboration observed X(3872)in B+?K±?+?-J/?decay;Y(4260)was discovered in e+e-??+?-J/? production by BaBar Collaboration,which is confirmed by CLEO,Belle,and BES?.Recently,BES? experiment have been observed Y(4260)and Y(4360)via the process e+e-??+?-J/?.The discovery of Y states has stimulated a great deal of discussion on their properties.Being produced in e+e-annihilation,the quantum number of Y state should be JPC=1--.However,the nature of the Y state has remained a mystery.To understand the underlying nature of these Y states,many theoretical interpretations have been proposed,such as hybrid,tetraquark or hadronic molecule model.However,none of them can explain the phenomena in experiment.Searching new decay model and measuring the line-shape of the cross section would help to understand the Y particles,and can improve the existing theoretical modelsBES? has accumulated a large data samples at center-of-mass energies(?)>3.773 GeV,an opportunity to search the charmonium-like states and studying their properties.In this paper,we report the measurement of the born cross section of e+e-??? with the data sample(from(?)=3.773 to 4.600 GeV)collected at BES?.According to our work,there are no significant evidences for the existences of Y(4260)and Y(4360).