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Non-Singlet QCD Analysis of the Structure Function F_2 in 3-Loops

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arxiv hep-ph/0407089 v2 pith:ENGZU34J submitted 2004-07-07 hep-ph hep-ex

classification hep-phhep-ex
keywords resultsanalysiscorrelateddeterminederrorsfunctionnon--singletstructure
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

First results of a non--singlet QCD analysis of the structure function $F_2(x,Q^2)$ in 3--loop order based on the non--singlet world data are presented. Correlated errors are determined and their propagation through the evolution equations is performed analytically. The value for $\alpha_s(M_Z)$ is determined to be $0.1135 +/- 0.0023/0.0026$ compatible with results from other QCD analyses. Low moments for $u_v(x)$, $d_v(x)$ and $u_v(x) - d_v(x)$ with correlated errors are calculated which may be compared with results from lattice simulations.

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