{"paper":{"title":"Revisit of the electromagnetic correction to $\\tau\\to\\pi\\pi\\nu_\\tau$ and its implication for muon $g-2$ based on $\\tau$ data","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Ao Li, Chun-Gui Duan, Jin Hao, Zhi-Hui Guo, Zhi-Xin Li","submitted_at":"2025-10-05T12:20:42Z","abstract_excerpt":"In this work we focus on the evaluation of the leading-order hadronic vacuum polarization contribution from the $\\pi\\pi$ channel to the muon anomalous magnetic moment $a_\\mu$ by using the experimental $\\tau\\to\\pi\\pi\\nu_\\tau$ data. The isospin breaking corrections play the decisive role in this approach of computing $a_\\mu$. One of such important isospin breaking sources is the long-distance electromagnetic correction factor $G_{\\rm EM}$ of the $\\tau\\to\\pi\\pi\\nu_\\tau$ process from the real photon radiation. The latter effect can be calculated from the $\\tau\\to\\pi\\pi\\nu_\\tau\\gamma$ amplitude, wh"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2510.04172","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2510.04172/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}