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
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作者机构：Department of Physics Addis Ababa University Addis Ababa Ethiopia School of Physics Shandong University Jinan China
出 版 物：《Journal of Modern Physics》 (现代物理（英文）)
年 卷 期：2014年第5卷第11期
页 面：1027-1035页
学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学]
主 题：Bethe-Salpeter Wave Function Virtual States Relative Momentum
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.
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