Measurement of the Running of the Fine-Structure Constant

Details Measurement of the Running of the Fine-Structure Constant Measurement of the Running of the Fine-Structure Constant

2000-02-14

arxiv.org/abs/hep-ex/0002035v1

Phys.Lett.B476:40-48,2000

Physics

High Energy Physics

High Energy Physics - Experiment

Scientific paper

10.1016/S0370-2693(00)00122-2

Bhabha scattering data recorded at \sqrt{s}=189 GeV by the L3 detector at LEP
are used to measure the running of the effective fine-structure constant for
spacelike momentum transfers. The results are alpha^-1(-2.1 GeV^2) -
alpha^-1(-6.25 GeV^2) = 0.78 +/- 0.26 alpha^-1(-12.25 GeV^2) - alpha^-1(-3434
GeV^2) = 3.80 +/- 1.29, in agreement with theoretical predictions.

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