High Precision Test of QCD at Beijing Electron Positron Collider

1999/08/10 by Bo-Qiang Ma
Physics and Astronomy · #hep-ph #hep-ex

paper · pdf

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

arxiv created 1999/08/10 · arxiv updated 2009/11/30

Abstract

The generalized Crewther relation relates the cross section ratio R=σ(e⁺e^- → \rm 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.

Related

• Commensurate Scale Relations: Precise Tests of Quantum Chromodynamics without Scale or Scheme Ambiguity
• Precise Tests of QCD in e+e- Annihilation
• Optimal Renormalization Scales and Commensurate Scale Relations
• Precision Tests of Quantum Chromodynamics and the Standard Model
• Representation of the RG-invariant quantities in perturbative QCD through powers of the conformal anomaly