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arXiv · 1701.00218

Analytical Forms for Cross Sections of Di-lepton Production from $e^+e^-$ Collisions around the $J/\psi$ Resonance

Xing-Yu Zhou·Ya-Di Wang·Li-Gang Xia
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Abstract

A detailed theoretical derivation of the cross sections of $e^+e^- \to e^+e^-$ and $e^+e^- \to \mu^+\mu^-$ around the $J/\psi$ resonance is reported. The resonance and interference parts of the cross sections, related to $J/\psi$ 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 $\psi(3686)$ resonance.

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Xing-Yu Zhou, Ya-Di Wang, Li-Gang Xia. 2017-01-01. Analytical Forms for Cross Sections of Di-lepton Production from $e^+e^-$ Collisions around the $J/\psi$ Resonance. https://doi.org/10.1088/1674-1137%2F41%2F8%2F083001

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