Tests of the Standard Model in Leptonic Reactions at {PETRA} Energies

is presented. The data were obtained with the JADE detector at thee+e− storage ring PETRA. They are compared to predictions of electroweak theories, in particular the standard model. For the total cross-sections of all three reactions and for the differential cross-section of Bhabha scattering no deviation from QED is found over the entire energy range. The differential cross-sections of μ and τ pairs at high energies show the angular asymmetry predicted by electroweak interference. The axial-vector and vector weak coupling constant, sin2θW andMZ are determined and compared to other measurements. Finally, limits on deviations from the standard model are given.

ELECTRON POSITRON: ELASTIC SCATTERING
ELASTIC SCATTERING: ELECTRON POSITRON
ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON
ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
MUON: ELECTROPRODUCTION
ELECTROPRODUCTION: MUON
TAU: ELECTROPRODUCTION
ELECTROPRODUCTION: TAU

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