Distributions of event shape variables obtained from 120600 hadronic Z decays measured with the DELPHI detector are compared to the predictions of QCD based event generators. Values of the strong coupling constant alpha(s) are derived as a function of the renormalization scale from a quantitative analysis of eight hadronic distributions. The final result, alpha(s) (M(Z)) = 0.113 +/- 0.007, is based on second order perturbation theory and uses two hadronization corrections, one computed with a parton shower model and the other with a QCD matrix element model.

Determination of Alpha-s In 2nd-order Qcd From Hadronic-z Decays

CIRIO, Roberto;ROMERO, Alessandra;
1992-01-01

Abstract

Distributions of event shape variables obtained from 120600 hadronic Z decays measured with the DELPHI detector are compared to the predictions of QCD based event generators. Values of the strong coupling constant alpha(s) are derived as a function of the renormalization scale from a quantitative analysis of eight hadronic distributions. The final result, alpha(s) (M(Z)) = 0.113 +/- 0.007, is based on second order perturbation theory and uses two hadronization corrections, one computed with a parton shower model and the other with a QCD matrix element model.
1992
54
55
73
P. ABREU;W. ADAM;F. ADAMI;T. ADYE;T. AKESSON;G. D. ALEKSEEV;P. ALLEN;S. ALMEHED;S. J. ALVSVAAG;U. AMALDI;E. ANASSONTZIS;P. ANTILOGUS;W. D....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/102889
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