Test of QED in e+ e- ---> gamma gamma at LEP - INSPIRE

DataBETA

Test of QED in e+ e- ---> gamma gamma at LEP

L3

Collaboration

Aug, 1990

6 pages

Published in:

Phys.Lett.B 250 (1990) 199-204

Published: 1990

DOI:

10.1016/0370-2693(90)91177-D

Report number:

L3-013

Experiments:

CERN-LEP-L3

View in:

CERN Document Server

reference search37 citations

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Abstract: (Elsevier)

We have measured the cross-section of the reaction e + e − → γγ at center of mass energies around the Z 0 mass. The results are in good agreement with QED predictions. For the QED cutoff parameters the limit of Λ + > 103 GeV and Λ − 118 GeV are found. For the decays Z 0 → γ ,Z 0 → π 0 γ , Z 0 → γγγ we find upper limits of 2.9 × 10 −4 ,2.9×10 −4 ,4.1×10 −4 and 1.2×10 −4 , respectively. All limits are at 95% CL.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
photon: pair production
pair production: photon
quantum electrodynamics: Lambda parameter
Z0: electroproduction
electroproduction: Z0
Z0: radiative decay

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