Experimental study of the reactions e+e--->e+e- and e+e---> gamma gamma at 29 GeV.

Journal article

This paper reports measurements of the differential cross sections for the reactions e+e-'e+e- (Bhabha scattering) and e+e-' (-pair production). The reactions are studied at a center-of-mass energy of 29 GeV and in the polar-angular region -costheta -<0.55. A direct cross-section comparison between these two reactions provides a sensitive test of the predictions of quantum electrodynamics (QED) to order ±3. When the ratio of -pair to Bhabha experimental cross sections, integrated over -costheta -<0.55, is divided by the same ratio predicted from ±3 QED theory, the result is 1.007±0.009±0.008. The 95%-confidence limits on the QED-cutoff parameters are +>154 GeV and ->220 GeV for Bhabha scattering, and +>59 GeV and ->59 GeV for -pair production. © 1986 The American Physical Society.

Authors: Derrick, M; Gan, K; Kooijman, P; Loos, J; Musgrave, B

• Publication status: Published
• Journal: Physical review D: Particles and fields
• Volume: 34
• Issue: 11
• Pages: 3286-3303
• Publication date: 1986-12-01
• DOI: 10.1103/physrevd.34.3286
• ISSN: 0556-2821
• Language: English