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

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

doi:10.1016/s0550-3213(01)00281-4

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

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

Authors

S.J. Burby

C.J. Maxwell

Abstract

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.

Citation

Burby, S., & Maxwell, C. (2001). Direct extraction of QCD ΛMS from e⁺e⁻ jet observables. Nuclear Physics B, 609(1-2), 193-224. https://doi.org/10.1016/s0550-3213%2801%2900281-4

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
DOI	https://doi.org/10.1016/s0550-3213%2801%2900281-4
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.