High Precision Test of QCD at Beijing Electron Positron Collider

Details High Precision Test of QCD at Beijing Electron Positron Collider High Precision Test of QCD at Beijing Electron Positron Collider

1999-08-10

arxiv.org/abs/hep-ph/9908312v1

High Energy Phys.Nucl.Phys. 23 (1999) 922-925

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 page Latex file, to be published in High Energy Phys. Nucl. Phys. 23 (1999) 922-925

Scientific paper

The generalized Crewther relation relates the cross section ratio $R=\sigma(e^+e^- \to {\rm hadrons})/\sigma(e^+e^- \to {\mu}^+ {\mu}^-)$ 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 $\tau$-Charm factory with higher precision and thus can be served for a high precision test of QCD in the Standard Model.

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