Abstract
Within the extended vector meson dominance model,we investigate the e+e-→ ∧+c(∧)-c reaction and the electromagnetic form factors of the charmed baryon ∧+c.The model parameters are determined by fitting them to the cross sections of the process e+e-→ ∧+c(∧)-c and the magnetic form factor |GM| of ∧+c.By considering four charmonium-like states,called φ(4500),φ(4660),φ(4790),and φ(4900),we can well describe the current data on the e+e-→ ∧+c(∧)-c reaction from the reaction threshold up to 4.96 GeV.In addition to the total cross sections and |GM|,the ratio |GE/GM| and the effective form factor |Geff| for ∧+c are also calculated,and found that these calculations are consistent with the experimental data.Within the fitted model parameters,we have also estimated the charge radius of the charmed ∧+c baryon.
基金项目
National Key R&D Program of China(2023YFA1606703)
National Natural Science Foundation of China(12075288)
Youth Innovation Promotion Association CAS()
万方数据