{"paper":{"title":"Non--Singlet QCD Analysis of Deep Inelastic World Data at \\boldmath $O(\\alpha_s^3)$","license":"","headline":"","cross_cats":["hep-ex","hep-lat"],"primary_cat":"hep-ph","authors_text":"Alberto Guffanti, Helmut B\\\"ottcher, Johannes Bl\\\"umlein","submitted_at":"2006-07-18T17:55:42Z","abstract_excerpt":"A non--singlet QCD analysis of the structure function $F_2(x,q^2)$ in LO, NLO, NNLO and N$^3$LO is performed based on the world data for charged lepton scattering. We determine the valence quark parton densities and present their parameterization and that of the correlated errors in a wide range of $x$ and $Q^2$. In the analysis we determined the QCD--scale $\\Lambda_{\\rm QCD, N_f = 4}^{\\bar{\\rm MS}} = 265 \\pm 27 \\MeV {\\rm (NLO)}, 226 \\pm 25 \\MeV  {\\rm (NNLO)}, 234 \\pm 26 \\MeV {\\rm (N^3LO)}$, with a remainder uncertainty of $\\pm 2\\MeV$ for the yet unknown 4--loop anomalous dimension, correspond"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0607200","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}