We investigate the e^(+)e^(-)→∑∑^(-) and e^(+)e^(-)→Λ∑^(-)reactions within the extended vector meson dominance model.In addition to the ground state mesons ρ and ω,we consider the contributions of the excited ...We investigate the e^(+)e^(-)→∑∑^(-) and e^(+)e^(-)→Λ∑^(-)reactions within the extended vector meson dominance model.In addition to the ground state mesons ρ and ω,we consider the contributions of the excited states ρ(3D),ω(3D),φ(3D),and ρ(2850).It is found that the current experimental data on the Σ electromagnetic form factors in timelike region can be well reproduced.The Φ(3D) resonance is essential to the near thresholdenhancement of the cross-section for the e^(+)e^(-)→∑∑^(-) reaction. Furthermore, in the e^(+)e^(-)→Λ∑^(-) reaction, theρ(3D) is important to get a good fit for the experimental results.展开更多
基金partly supported by the National Key R&D Program of China(Grant No.2023YFA1606703)the National Natural Science Foundation of China(Grant Nos.12435007,12361141819,12275185,and 12335002)。
文摘We investigate the e^(+)e^(-)→∑∑^(-) and e^(+)e^(-)→Λ∑^(-)reactions within the extended vector meson dominance model.In addition to the ground state mesons ρ and ω,we consider the contributions of the excited states ρ(3D),ω(3D),φ(3D),and ρ(2850).It is found that the current experimental data on the Σ electromagnetic form factors in timelike region can be well reproduced.The Φ(3D) resonance is essential to the near thresholdenhancement of the cross-section for the e^(+)e^(-)→∑∑^(-) reaction. Furthermore, in the e^(+)e^(-)→Λ∑^(-) reaction, theρ(3D) is important to get a good fit for the experimental results.
