| A discussion on vacuum polarization correction to the cross-section of e~+e~-→γ~*/ψ →μ~+μ~- |
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| 引用本文： | 金红豆,周利鹏,张丙新,胡海明.A discussion on vacuum polarization correction to the cross-section of e~+e~-→γ~*/ψ →μ~+μ~-[J].中国物理C（英文版）,2019(1). |
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| 作者姓名： | 金红豆 周利鹏 张丙新 胡海明 |
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| 摘 要： | Vacuum polarization is a part of the initial-state radiative correction for the cross-section of e~+e~- annihilation processes. In the energy region in the vicinity of narrow resonances J/ψ and ψ(3686), the vacuum polarization contribution from the resonant component has a significant effect on the line-shape of the lepton pair production cross-section. This paper discusses some basic concepts and describes an analytical calculation of the cross-section of e~+e~-→γ*/ψ→μ+μ-considering the single and double vacuum polarization effect of the virtual photon propagator. Moreover, it presents some numerical comparisons with the traditional treatments.
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