论文信息 - Precision test of QED by direct comparison of e+e− → γγ and e+e− → e+e− at 29 GeV

Precision test of QED by direct comparison of e+e− → γγ and e+e− → e+e− at 29 GeV

Abstract The ratio of differential cross sections for the reactions e+e− → γγ and e+e− → e+e− is measured at s = 29 GeV in the central polar angle region, |cos θ| 59 GeV and Λ- > 59 GeV.

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