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München 1997 – scientific programme

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T: Teilchenphysik

T 403: QCD IV

T 403.3: Talk

Thursday, March 20, 1997, 14:40–14:55, 101

Extracting αs from Electron-Positron Annihilation around 10 GeV — •Thomas Teubner1, K.G. Chetyrkin2, and J.H. Kühn31University of Durham, England — 2Max-Planck-Institut für Physik, München — 3Institut für Theoretische Teilchenphysik, Universität Karlsruhe

The total cross section for electron-positron annihilation into hadrons is calculated in the region just below the B meson threshold. QCD corrections up to third order, quark mass effects, initial state radiation, the running of αQED and the tails of the Upsilon resonances are included in the prediction. For given αs the prediction is accurate to 0.5 percent. An experimental measurement with the corresponding precision would allow to determine αs with high accuracy at intermediate energies.

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