{"paper":{"title":"The strong coupling from $e^+e^-\\to$ hadrons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Alex Keshavarzi, Daisuke Nomura, Diogo Boito, Kim Maltman, Maarten Golterman, Santiago Peris, Thomas Teubner","submitted_at":"2018-11-05T16:28:39Z","abstract_excerpt":"We use a new compilation of the hadronic $R$-ratio from available data for the process $e^+e^-\\to$ hadrons below the charm mass to determine the strong coupling $\\alpha_s$, using finite-energy sum rules. Quoting our results at the $\\tau$ mass to facilitate comparison to the results obtained from similar analyses of hadronic $\\tau$-decay data, we find $\\alpha_s(m_\\tau^2)=0.298\\pm 0.016\\pm 0.006$ in fixed-order perturbation theory, and $\\alpha_s(m_\\tau^2)=0.304\\pm 0.018\\pm 0.006$ in contour-improved perturbation theory, where the first error is statistical, and the second error combines various "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.01829","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"}