1 0 A ug 1 99 9 Revised BIHEP - TH - 96 - 24 High Precision Test of QCD at Beijing Electron Positron Collider
نویسنده
چکیده
The generalized Crewther relation relates the cross section ratio R = σ(e + e − → hadrons)/σ(e + e − → µ + µ −) in e + e − annihilation with the Bjorken sum rule or the Gross-Llewellyn Smith sum rule in deep inelastic scattering and provides a fundamental connection for observables in Quantum Chromodynamics (QCD) without scale or scheme ambiguities. The ratio R can be measured at the upgrated Bejing Electron Positron Collider or the τ-Charm factory with higher precision and thus can be served for a high precision test of QCD in the Standard Model.lider, deep inelastic scattering.
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