Results are presented from a study of the structure of high energy hadronic events recorded by the L3 detector at √s≥192 GeV. The distributions of several event shape variables are compared to resummed σ(αs2) QCD calculations. We determine the strong coupling constant at three average centre-of-mass energies: 194.4, 200.2 and 206.2 GeV. These measurements, combined with previous L3 measurements at lower energies, demonstrate the running of αs as expected in QCD and yield αs(mZ)=0.1227±0.0012±0.0058, where the first uncertainty is experimental and the second is theoretical.

Determination of Alpha_s from Hadronic Event Shapes in e+e- Annihilation at 192 < or = sqrt(s) < or = 208 GeV

CAVALLO, Nicola;
2002-01-01

Abstract

Results are presented from a study of the structure of high energy hadronic events recorded by the L3 detector at √s≥192 GeV. The distributions of several event shape variables are compared to resummed σ(αs2) QCD calculations. We determine the strong coupling constant at three average centre-of-mass energies: 194.4, 200.2 and 206.2 GeV. These measurements, combined with previous L3 measurements at lower energies, demonstrate the running of αs as expected in QCD and yield αs(mZ)=0.1227±0.0012±0.0058, where the first uncertainty is experimental and the second is theoretical.
2002
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11563/8443
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 36
  • ???jsp.display-item.citation.isi??? 35
social impact