{"paper":{"title":"An updated determination of \\alpha_s from tau decays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-lat","nucl-th"],"primary_cat":"hep-ph","authors_text":"Andisheh Mahdavi, Diogo Boito, James Osborne, Kim Maltman, Maarten Golterman, Matthias Jamin, Santiago Peris","submitted_at":"2012-03-14T17:07:23Z","abstract_excerpt":"Employing our previous framework to treat non-perturbative effects self-consistently, including duality violations, we update the determination of the strong coupling, \\alpha_s, using a modified version of the 1998 OPAL data, updated to reflect current values of exclusive mode hadronic \\tau decay branching fractions. Our best n_f=3 values from the updated OPAL data are \\alpha_s(m^2_\\tau)=0.325+-0.018 and \\alpha_s(m^2_\\tau)=0.347+-0.025 in fixed-order and contour-improved perturbation theory, respectively.\n  To account for non-perturbative effects, non-linear, multi-parameter fits are necessary"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.3146","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"}