{"paper":{"title":"The anomalous magnetic moment of the muon in the Standard Model: an update","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Adopting the lattice-QCD average for leading hadronic vacuum polarization shifts the Standard Model prediction for the muon anomalous magnetic moment upward, removing tension with experiment.","cross_cats":["hep-ex","hep-lat","nucl-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"A. Altherr, A. Bashir, A. Beltran, A. Crivellin, A. Czarnecki, A. Denig, A. Driutti, A. Francis, A. G\\'erardin, A. Guevara, A. Gurgone, A. Hoecker, A. J\\\"uttner, A. Keshavarzi, A. Kupich, A. Kup\\'s\\'c, A. Lusiani, A. Lutz, A. Miramontes, A. Miranda, A. Pich, A. Portelli, A. Price, A. Radzhabov, A. Rebhan, A. Risch, A. Rodr\\'iguez-S\\'anchez, A. Signer, A. S. Kronfeld, A. S. Zhevlakov, A. T. Lytle, A. Vaquero, A. V. Grebe, A. V. Nesterenko, A. Wright, A. X. El-Khadra, B. Chakraborty, B. Kubis, B.-L. Hoid, B. L. Roberts, B. Malaescu, C. Alexandrou, C. Aubin, C. DeTar, C. F. Redmer, C. Lehner, C. M. Carloni Calame, C. S. Fischer, C. T. Peterson, C. Y. London, C. Z. Yuan, D. A. Clarke, D. Boito, D. Djukanovic, D. Giusti, D. Nomura, D. Portillo-S\\'anchez, D. Radic, D. Stamen, D. St\\\"ockinger, D. W. Hertzog, E. Balzani, E. Budassi, E. Estrada, E. G\\'amiz, E. P. Solodov, E. T. Neil, E. Zaid, F. Erben, F. Hagelstein, F. Ignatov, F. M. Stokes, F. No\\\"el, F. Piccinini, F. P. Ucci, F. Sannino, G. Benton, G. Chanturia, G. Colangelo, G. Eichmann, G. Gagliardi, G. Kanwar, G. Levati, G. L\\'opez Castro, G. Montagna, G. S. Huang, G. Toledo, G. Venanzoni, G. von Hippel, G. Wang, H. B. Meyer, H. Hayashii, H. Sch\\\"afer, H. St\\\"ockinger-Kim, H. Wittig, I. Campos Plasencia, I. Caprini, I. Danilkin, I. Logashenko, J. Bijnens, J. Finkenrath, J. Gogniat, J. Komijani, J. Koponen, J. Leutgeb, J. Libby, J. L. Ma, J. L\\\"udtke, J. Mager, J. M\\'arquez, J. Muskalla, J. N. Simone, J.-N. Toelstede, J. Paltrinieri, J. Parrino, J. Ruiz de Elvira, J. T. Tsang, J. W. Sitison, K. Demory, K. Ferraby, K. F. Liu, K. Inami, K. Maltman, K. Miura, K. M\\\"ohling, K. Ottnad, K. Raya, K. Yamashita, L. A. Heuser, L. Cappiello, L. Cotrozzi, L. Del Debbio, L. Flower, L. Hostetler, L. Jin, L. Lellouch, L. Parato, L. Polat, L. Punzi, L.-Y. Dai, M. Anderson, M. Bruno, M. C\\`e, M. Cottini, M. Davier, M. Della Morte, M. Endo, M. Ghilardi, M. Golterman, M. Hayakawa, M. Hoferichter, M. K. Marinkovi\\'c, M. Knecht, M. Lellmann, M. Nio, M. Passera, M. Procura, M. T. Hansen, M. T. Lynch, M. Vanderhaeghen, M. Zanke, M. Zillinger, N. Hermansson-Truedsson, N. Kalntis, N. Miller, N. Vestergaard, O. Nicrosini, O. Shekhovtsova, P. Beltrame, P. Boyle, P. Masjuan, P. Paradisi, P. Petit Ros\\`as, P. Roig, P. S\\'anchez-Puertas, P. Stoffer, P. Tavella, Q. Liu, Q. M. Li, R. Aliberti, R. Frezzotti, R. Gruber, R. J. Hudspith, R. Kitano, R. N. Pilato, R. S. Van de Water, S. Bacchio, S. Burri, S. E. M\\\"uller, S. Gonz\\`alez-Sol\\'is, S. Gottlieb, S. G\\\"undogdu, S. Hashimoto, S. Holz, S. I. Serednyakov, S. Kollatzsch, S. Kuberski, S. Lahert, S. Laporta, S. Peris, S. Pitelis, S. Plura, S. Romiti, S. Sahoo, S. Simula, S. Volkov, T. Aoyama, T. Blum, T. Dave, T. Draper, T. Iijima, T. Lenz, T. Leplumey, T. Lin, T. Mibe, T. Teubner, T. Yoshioka, U. Wenger, V. Biloshytskyi, V. Cirigliano, V. Druzhinin, V. G\\\"ulpers, V. Lubicz, V. Pascalutsa, W. J. Torres Bobadilla, W.P. Wang, X. Feng, X. T. Hou, Y. B. Yang, Y. P. Liao, Y. Schelhaas, Y. Sue, Y. Ulrich, Z. W\\k{a}s, Z. Zhang","submitted_at":"2025-05-27T17:48:30Z","abstract_excerpt":"We present the current Standard Model (SM) prediction for the muon anomalous magnetic moment, $a_\\mu$, updating the first White Paper (WP20) [1]. The pure QED and electroweak contributions have been further consolidated, while hadronic contributions continue to be responsible for the bulk of the uncertainty of the SM prediction. Significant progress has been achieved in the hadronic light-by-light scattering contribution using both the data-driven dispersive approach as well as lattice-QCD calculations, leading to a reduction of the uncertainty by almost a factor of two. The most important dev"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Adopting the lattice-QCD average for LO HVP has resulted in a major upward shift of the total SM prediction, which now reads a_μ^SM = 116592033(62)×10^{-11} (530 ppb). When compared against the current experimental average one finds a_μ^exp - a_μ^SM = 38(63)×10^{-11}, which implies that there is no tension between the SM and experiment at the current level of precision.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The assumption that the consolidated lattice-QCD average for the leading-order hadronic vacuum polarization is more reliable than any combination of the conflicting data-driven dispersive evaluations; this single choice produces the upward shift and the no-tension conclusion.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"The updated SM prediction for the muon anomalous magnetic moment is 116592033(62)×10^{-11}, showing no tension with the experimental average of 38(63)×10^{-11}.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Adopting the lattice-QCD average for leading hadronic vacuum polarization shifts the Standard Model prediction for the muon anomalous magnetic moment upward, removing tension with experiment.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"7e202c3eb75d98f808bdd2ef101cb8d47a84f0b318c324cf25659d39168b74bb"},"source":{"id":"2505.21476","kind":"arxiv","version":3},"verdict":{"id":"a5ca78a6-8de9-4df9-b8eb-317d93fe088a","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-15T13:14:56.426058Z","strongest_claim":"Adopting the lattice-QCD average for LO HVP has resulted in a major upward shift of the total SM prediction, which now reads a_μ^SM = 116592033(62)×10^{-11} (530 ppb). When compared against the current experimental average one finds a_μ^exp - a_μ^SM = 38(63)×10^{-11}, which implies that there is no tension between the SM and experiment at the current level of precision.","one_line_summary":"The updated SM prediction for the muon anomalous magnetic moment is 116592033(62)×10^{-11}, showing no tension with the experimental average of 38(63)×10^{-11}.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The assumption that the consolidated lattice-QCD average for the leading-order hadronic vacuum polarization is more reliable than any combination of the conflicting data-driven dispersive evaluations; this single choice produces the upward shift and the no-tension conclusion.","pith_extraction_headline":"Adopting the lattice-QCD average for leading hadronic vacuum polarization shifts the Standard Model prediction for the muon anomalous magnetic moment upward, removing tension with experiment."},"references":{"count":300,"sample":[{"doi":"","year":2020,"title":"Aoyama et al., Phys","work_id":"ffacfe73-9e74-4915-b003-8a61b2b71546","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":1962,"title":"G. Charpak, F. J. M. Farley, and R. L. Garwin, Phys. Lett.1, 16 (1962)","work_id":"c8bb7c91-bac8-4b3e-b56c-3e8fb2c0bfb2","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":1968,"title":"J. Bailey, W. Bartl, G. V on Bochmann, R. C. A. Brown, F. J. M. Farley, H. Joestlein, E. Picasso, and R. W. Williams, Phys. Lett. B28, 287 (1968)","work_id":"f90005ab-efec-4237-a67d-e53f0201912e","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":1979,"title":"J. Baileyet al.(CERN-Mainz-Daresbury), Nucl. Phys. B150, 1 (1979)","work_id":"72e4cf09-6fa2-4b5f-a45c-5e1863fb19bb","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2006,"title":"Bennettet al.(Muon g-2), Phys","work_id":"cde86f7d-be78-4400-a1fb-fab16ac3f1f8","ref_index":5,"cited_arxiv_id":"hep-ex/0602035","is_internal_anchor":true}],"resolved_work":300,"snapshot_sha256":"069f693eed24b9f1b25de13ef74e9a53d7ed045b6d54b4791b0ed1374944501f","internal_anchors":95},"formal_canon":{"evidence_count":2,"snapshot_sha256":"48f226955b1629d5c05dee9cbfc7e42bf19a169c527917274d0398c7f858cf65"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}