Inspired by the recent measurement of the process e+e-→∧■,we calculate the mass spectrum of the 0 meson with the GI model.For the excited vector strangeonium states ?（3 S,4 S,5 S,6 S） and ?（2 D,3 D,4 D,5 D）,we ...Inspired by the recent measurement of the process e+e-→∧■,we calculate the mass spectrum of the 0 meson with the GI model.For the excited vector strangeonium states ?（3 S,4 S,5 S,6 S） and ?（2 D,3 D,4 D,5 D）,we investigate the electronic decay width with the Van Royen-Weisskopf formula,and the partial widths of the ∧■,■,and■ decay modes with the extended quark-pair creation model.We find that the electronic decay width of the D-wave vector strangeonium is about 3～8 times larger than of the S-wave vector strangeonium.Around 2232 Me V,the partial decay width of the ∧■ mode can be up to several MeV for ?（33 S1）,while the partial ∧■ decay width of ?（23 D1） is O(10-3) keV.If the threshold enhancement reported by the BESIII collaboration arises from the strangeonium meson,this state is very likely the ?（33 S1） state.We also note that the ∧■ and∑+■partial decay widths of the states ?（33 D1） and ?（43 S1） are several MeV,which is sufficient to be observed in future experiments.展开更多
基金Supported by the National Natural Science Foundation of China(11575008,11621131001,11775078,U1832173)National Key Basic Research Program of China(2015CB856700)In part supported by China Postdoctoral Science Foundation(2017M620492)
文摘Inspired by the recent measurement of the process e+e-→∧■,we calculate the mass spectrum of the 0 meson with the GI model.For the excited vector strangeonium states ?（3 S,4 S,5 S,6 S） and ?（2 D,3 D,4 D,5 D）,we investigate the electronic decay width with the Van Royen-Weisskopf formula,and the partial widths of the ∧■,■,and■ decay modes with the extended quark-pair creation model.We find that the electronic decay width of the D-wave vector strangeonium is about 3～8 times larger than of the S-wave vector strangeonium.Around 2232 Me V,the partial decay width of the ∧■ mode can be up to several MeV for ?（33 S1）,while the partial ∧■ decay width of ?（23 D1） is O(10-3) keV.If the threshold enhancement reported by the BESIII collaboration arises from the strangeonium meson,this state is very likely the ?（33 S1） state.We also note that the ∧■ and∑+■partial decay widths of the states ?（33 D1） and ?（43 S1） are several MeV,which is sufficient to be observed in future experiments.
