{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"bcd4dc1b23a1f1dcafc8d80b3ab8423d37a585222fed7161163cce225a868912","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["7bf08dc0cbbc6d712f88659419fa7f025240cebcdba676af431a6ddfada7c88e","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"24eb2b1647dcc7b407d58fc00f66323037e03a50f847f7c8116ea6512ed64627","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"hep.electroweak-anomalies.muon-g2-residual","kind":"well-posed","literature_status":"partially-resolved","n":"2","parents":[],"plain":"The muon behaves like a tiny magnet whose strength was measured to about one part in ten million. The SM prediction now agrees, but only after replacing one method of computing the strong-force part with another.","posed_since":"2001","precise":"Fermilab's final result (2025) gives $a_{\\mu} = 116592070.5(14.8) x 1e-11\\ (127\\ \\mathrm{ppb})$; the world average with BNL is $116592071.5(14.5) x 1e-11\\ (124\\ \\mathrm{ppb})$; the 2025 Theory Initiative prediction using lattice-QCD HVP (hadronic vacuum polarization) is $116592033(62) x 1e-11$, in agreement. The residual question is whether the SM prediction with uncertainty $\\sim 20 \\times 1e-11$ still agrees once data-driven and lattice HVP are reconciled.","problem_ref":"7bf08dc0cbbc6d712f88659419fa7f025240cebcdba676af431a6ddfada7c88e","references":"","settled_by":"Lattice HVP at $\\sim 0.2\\%$ from several groups, consistent $e+e-$ hadronic data, the MUonE spacelike HVP measurement, and the J-PARC muon $g-2$ experiment.","status_note":"In 2025 the long-standing $4\\ \\text{to}\\ 5\\,\\sigma$ discrepancy disappeared with the lattice-based SM value; the data-driven value remains inconsistent.","title":"Does the SM match the final muon g-2 measurement?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"331bfb79ef4428301c8934b62fefe5284aed9dfb5db199fdcf98a2261e0f3f77","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"da126511273db689d3fb341d188b3a3e0632e16115e29be372a00e62788ad70b","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"w1jBrlgbYHM8KgVlLaO-0py6bf2529jeNgYrL82-EDPSIvbKtZmfusDDo70qUcsrZmpyqBh3V8JhJdjldZI9BQ"},"schema":"pubphys.envelope/1"},"record_hash":"331bfb79ef4428301c8934b62fefe5284aed9dfb5db199fdcf98a2261e0f3f77","leaf_index":3330}