Investigation on Virtual State Contribution to Gauge Invariant Cross Section of e<sup>+</sup>e<sup>-</sup>→J/ψ+η<sub>c</sub>in Bethe-Salpeter Framework

• 作者: Ming Li Shashank Bhatnagar Shiyuan Li
• 来源期刊: 现代物理(英文)
• 学科: 物理学
• 关键词: Bethe-Salpeter Wave Function Virtual States Relative MOMENTUM
• 年，卷（期）: 2014,（11）
• 页码范围: 1027-1035
• 页数: 9页
• 分类号: O57

摘要

It is shown that the virtual states and relative momentum of the constituents of the bound states are very important for the cross section of the process e+e-→J/ψ+ηc with the help of the Bethe-Salpeter wave function description of the bound states. The gauge invariance of the cross section is demonstrated. The numerical results can explain the experimental data.