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Theoretical uncertainties for measurements of alpha_s from electroweak observables | H.Stenzel
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26 Dec 2004 | Journal: | JHEP 0507 (2005) 0132 | Subject: | hep-ph | Abstract: | One of the most precise measurements of the strong coupling constant alpha_s(MZ) is obtained in the context of global analyses of precision electroweak data. This article reviews the sensitivity of different electroweak observables to alpha_s and describes the perturbative uncertainties related to missing higher orders. The complete renormalisation scale dependence for the relevant observables is calculated at next-to-next-to-leading order and a new method is presented to determine the corresponding perturbative uncertainty for measurements of alpha_s based on these observables. | Source: | arXiv, hep-ph/0501245 | Services: | Forum | Review | PDF | Favorites |
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