首页|e+e-→ ∧+c(∧)-c Cross Sections and the ∧+c Electromagnetic Form Factors within the Extended Vector Meson Dominance Model
e+e-→ ∧+c(∧)-c Cross Sections and the ∧+c Electromagnetic Form Factors within the Extended Vector Meson Dominance Model
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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.
陈诚、闫冰、谢聚军
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Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China
School of Nuclear Sciences and Technology,University of Chinese Academy of Sciences,Beijing 101408,China
College of Mathematics and Physics,Chengdu University of Technology,Chengdu 610059,China
Southern Center for Nuclear-Science Theory(SCNT),Institute of Modern Physics,Chinese Academy of Sciences,Huizhou 516000,China
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National Key R&D Program of ChinaNational Natural Science Foundation of ChinaYouth Innovation Promotion Association CAS
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