TY - JOUR
T1 - A simultaneous measurement of the QCD colour factors and the strong coupling
AU - Abbiendi, G
AU - Anagnostou, Georgios
AU - Bloodworth, Ian
AU - Charlton, David
AU - Hawkes, Christopher
AU - Homer, Roger
AU - Jovanovic, Predrag
AU - Lloyd, Alun
AU - McMahon, Thomas
AU - O'Neale, Stephen
AU - Talbot, Scott
AU - Watson, Miriam
AU - Watkins, Peter
AU - Watson, Alan
AU - Watson, Nigel
AU - Wilson, John
PY - 2001/5/1
Y1 - 2001/5/1
N2 - Using data from e(+)e(-) annihilation into hadrons, taken with the OPAL detector at LEP at the Z pole between 1991 and 1995, we performed a simultaneous measurement of the colour factors of the underlying gauge group of the strong interaction, C-F and C-A, and the strong coupling, alpha (s). The measurement was carried out by fitting next-to-leading order perturbative predictions to measured angular correlations of 4-jet events together with multi-jet related variables. Our results, C-A = 3.02 +/- 0.25(stat.) +/- 0.49(syst.), CF = 1.34 +/- 0.13(stat.) +/- 0.22(syst.), alpha (s) (M-Z) = 0.120 +/- 0.011(stat.) +/- 0.020(syst,), provide a test of perturbative QCD in which the only assumptions are non-abelian gauge symmetry and standard hadronization models. The measurements are in agreement with SU(3) expectations for C-F and C-A and the world average of alpha (s)(M-Z).
AB - Using data from e(+)e(-) annihilation into hadrons, taken with the OPAL detector at LEP at the Z pole between 1991 and 1995, we performed a simultaneous measurement of the colour factors of the underlying gauge group of the strong interaction, C-F and C-A, and the strong coupling, alpha (s). The measurement was carried out by fitting next-to-leading order perturbative predictions to measured angular correlations of 4-jet events together with multi-jet related variables. Our results, C-A = 3.02 +/- 0.25(stat.) +/- 0.49(syst.), CF = 1.34 +/- 0.13(stat.) +/- 0.22(syst.), alpha (s) (M-Z) = 0.120 +/- 0.011(stat.) +/- 0.020(syst,), provide a test of perturbative QCD in which the only assumptions are non-abelian gauge symmetry and standard hadronization models. The measurements are in agreement with SU(3) expectations for C-F and C-A and the world average of alpha (s)(M-Z).
U2 - 10.1007/s100520100699
DO - 10.1007/s100520100699
M3 - Article
VL - 20
SP - 601
EP - 615
JO - European Physical Journal C
JF - European Physical Journal C
IS - 4
ER -