Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - A combination by the LEP QCD working group of alpha-s values derived from event shape variables at LEP : a contribution to the 10th high-energy international conference on quantum chromodynamics held in Montpellier, France in July 2003.
AU - Jones, Roger W. L.
PY - 2004/7
Y1 - 2004/7
N2 - The LEP QCD Working Group has produced a combination of αs values derived from event-shape distributions. The distributions are measured at scales below the mass of the Z boson up to 206 GeV. Values of αs are all extracted using the consistent application of O(αs2)+ NLLA predictions with the modified Log(R) matching scheme. A combined αs is obtained for each experiment and observable using at least two experiments in each case for energies above at ad above the mass of the Z boson. A consistent treatment and controlled breakdown is made of the sources of uncertainty on the input values. The combined best value for αs(MZ) = 0.11 ± 0.003 ± 0.003. The dominant uncertainty is theoretical, due to the effects of missing higher order contributions.
AB - The LEP QCD Working Group has produced a combination of αs values derived from event-shape distributions. The distributions are measured at scales below the mass of the Z boson up to 206 GeV. Values of αs are all extracted using the consistent application of O(αs2)+ NLLA predictions with the modified Log(R) matching scheme. A combined αs is obtained for each experiment and observable using at least two experiments in each case for energies above at ad above the mass of the Z boson. A consistent treatment and controlled breakdown is made of the sources of uncertainty on the input values. The combined best value for αs(MZ) = 0.11 ± 0.003 ± 0.003. The dominant uncertainty is theoretical, due to the effects of missing higher order contributions.
U2 - 10.1016/j.nuclphysbps.2004.04.130
DO - 10.1016/j.nuclphysbps.2004.04.130
M3 - Journal article
VL - 133
SP - 13
EP - 20
JO - Nuclear Physics B - Proceedings Supplements
JF - Nuclear Physics B - Proceedings Supplements
SN - 0920-5632
IS - 1
ER -