Analytic forms for cross sections of di-lepton production from e+e-collisions around the J/ψ resonance

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2017,（8）
• 页码范围: 1-8
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1137/41/8/083001

摘要

A detailed theoretical derivation of the cross sections of e+e-→ e+e-and e+e-→ μ+ μ-around the J/ψ resonance is reported.The resonance and interference parts of the cross sections,related to J/ψ resonance parameters,are calculated.Higher-order corrections for vacuum polarization and initial-state radiation are considered.An arbitrary upper limit of radiative correction integration is involved.Full and simplified versions of analytic formulae are given with precision at the level of 0.1％ and 0.2％,respectively.Moreover,the results obtained in the paper can be applied to the case of the ψ(3686) resonance.