Skip to main content

Research Repository

Advanced Search

Direct extraction of QCD Λ<SUB>MS</SUB> from e⁺e⁻ jet observables

Burby, S.J.; Maxwell, C.J.


S.J. Burby

C.J. Maxwell


We directly fit the QCD dimensional transmutation parameter, , to experimental data on e+e− jet observables, making use of next-to-leading order (NLO) perturbative calculations. In this procedure there is no need to mention, let alone to arbitrarily vary, the unphysical renormalisation scale μ, and one avoids the ad hoc and potentially meaningless “theoretical error” associated with standard αs determinations. PETRA, SLD, and LEP data are considered in the analysis. An attempt is made to estimate the importance of uncalculated next-NLO and higher order perturbative corrections, and power corrections, by studying the scatter in the values of obtained for different observables.


Burby, S., & Maxwell, C. (2001). Direct extraction of QCD ΛMS from e⁺e⁻ jet observables. Nuclear Physics B, 609(1-2), 193-224.

Journal Article Type Article
Publication Date Aug 20, 2001
Deposit Date Nov 29, 2006
Journal Nuclear Physics B
Print ISSN 0550-3213
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 609
Issue 1-2
Pages 193-224
Keywords Electron-positron annihilation, Strong-coupling-constant, Free perturbation-theory, Su(N) gauge-theories, Quantum chromodynamics, E+E-annihilation, Cross-sections, Energy correlations, Leading order, Dependence.