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 - Theoretical uncertainties on alpha_s from event-shape variables in e+e? annihilations.
AU - Jones, Roger W. L.
AU - Ford, Matthew
AU - Salam, Gavin P.
AU - Stenzel, Hasko
AU - Wicke, Daniel
N1 - Jones led the analysis group and was chief author of the paper. This has set the method for subsequent systematic uncertainty determinations; it is referenced beyond the e+e- community. 29 citations (SPIRES). RAE_import_type : Journal article RAE_uoa_type : Physics
PY - 2003/12/1
Y1 - 2003/12/1
N2 - The precision of measurements of the strong coupling constant using event-shape variables in e +e- annihilations is limited by theoretical systematic uncertainties. The uncertainties are related to missing higher orders in the perturbative predictions for the event-shape distributions. A new method is presented for the assessment of theoretical uncertainties in α s . This method evaluates the systematic uncertainty of the parameter α s from the uncertainty of the prediction for the distributions from which it is extracted. The perturbative uncertainties are calculated on a purely theoretical basis, without accessing measured distributions. The method is therefore especially suited for an unbiased combination of results from different observables or experiments. It is universal and can be applied to other processes like jet production in deep-inelastic ep scattering or in hadron collisions.
AB - The precision of measurements of the strong coupling constant using event-shape variables in e +e- annihilations is limited by theoretical systematic uncertainties. The uncertainties are related to missing higher orders in the perturbative predictions for the event-shape distributions. A new method is presented for the assessment of theoretical uncertainties in α s . This method evaluates the systematic uncertainty of the parameter α s from the uncertainty of the prediction for the distributions from which it is extracted. The perturbative uncertainties are calculated on a purely theoretical basis, without accessing measured distributions. The method is therefore especially suited for an unbiased combination of results from different observables or experiments. It is universal and can be applied to other processes like jet production in deep-inelastic ep scattering or in hadron collisions.
KW - QCD
KW - NLO Computations
KW - Jets
U2 - 10.1088/1126-6708/2003/12/007
DO - 10.1088/1126-6708/2003/12/007
M3 - Journal article
VL - 2003
SP - 7
EP - 37
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 12
ER -