{"schema":"pubphys.bundle/1","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},"content_withheld":"false","files":[],"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"331bfb79ef4428301c8934b62fefe5284aed9dfb5db199fdcf98a2261e0f3f77","schema":"pubphys.attested/1"},"id_token":null,"id_token_withheld":"false","envelope":{"attested_hash":"da126511273db689d3fb341d188b3a3e0632e16115e29be372a00e62788ad70b","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"w1jBrlgbYHM8KgVlLaO-0py6bf2529jeNgYrL82-EDPSIvbKtZmfusDDo70qUcsrZmpyqBh3V8JhJdjldZI9BQ"},"schema":"pubphys.envelope/1"},"ots":{"attested":["AE9wZW5UaW1lc3RhbXBzAABQcm9vZgC_ieLohOiSlAEI2hJlESc9tonT-zQdGIs6PgYy4WEV4pvjcqAOYniK1wvwINodrvL_ZCDrGSL1ZNua3HkSYOhMQULZ3knJT6axaRFxCPAgwVV7nyBc2aBq7lndnqxsm6Fzu4l0CvF0IzMEhhew0H8I8CCEHX3ZQQtkQZG76Dtr4hqoZDxo5g40MT7TVJmuFDBIegjwIIaQXWOgbk1WxY_s7Cy5Zyml7znQxQ5m-HN2SNbwCxFRCPAg9KOsR5itmWo6z0jFQlhmpfYOxETluNUZMgC_tfmrncAI8SAkw4-FKikdZ9yrVszVracDV3BTJTboMzt2UveSyZlRtwjwIMtN_WSs-pavrta_9vKxLs54fFvTCFo_EbbiRpbJsL8_CPAg286fbogvT8QZD8nJMDWZS1r_Vyg5Jg4hl47VhsL1_UQI8SCRZP0ctidqGb7ZjgNGhZ1hJpAMc97VLUvI8DuO4xChLwjxID89HsXrUag9eRv04qSQX18D2ak5pxDN4H8m3_0Qkp84CPAg3mczMYDKOd7Nhf3ojA9ZvuTsN66Y1NnyYTp9j8GKQNwI8SCvAiiN-Hrv7IEejd8wdUihoozu5KOvpoBFJ0vg3UnGAQj_8Ajn9YmozHwo9QjwEJ46aM9ZDv3TdtqV3ZbRsNgI8SBOF8pILGf1kodr5MKmQs6Cd93joraGn3g6UPt_-kewPwjwIOG-gmM7bd_eR4AiDMNfluS3xvr7vicLR-sCBr5qtG2cCPAgrVNFrCoeQcCxhlmnE0BzHgR8HQpZAlfqzDDFzfWb8GUI8QRq0WWT8AjZJ2cF_c7k8ACD3-MNLvkMjiwraHR0cHM6Ly9ib2IuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZ_AI9ZMS1zxd7IEI8BDd00WgJZ0RncsC1Fyai_4aCPEgvxMFrnu7F05IW5INiraQ3OVEYMjNx6JfBxw1Q4jPLi4I8QRq0WWS8Ag2zxPAtI5JsP8Ag9_jDS75DI4uLWh0dHBzOi8vYWxpY2UuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZwjxIHAnv4KFFf4uiYEFJvLxiMxSyz8VowJP4roTfDD9h7bICPAgj5tgvbNF7mxSP4jGGE66ezUFRLnI4g1VTkvuV4VtCPAI8CCxlc1HuKORuHgn7DYIYcDhc4oo99OkTWBEvddBypoa7AjwIFcjjaF8kDNDYCZGaNISlRjvX-I7in-QNwsr4JYQbFJvCPAgnl0k4gs7LuY5i1umiHO-J7My3uBThLJUWQoY9LdVSrQI8SA6-Ft11_K_GqMNWYhkVsVqCFvXSYbp4S8JoLsLBnUzvgjxIBC8_mAE7JBP35SNxDBcG7joLJwURpMxdV2vSO64_jEOCPEge04Coj1xSi7CE8UwqiBGNhPyZ5QdD_YZwn-heSdObU4I8SBgdDSgr3VUx1j8m_pK7-OzMwwFgXeLy43ujffCv-hf5AjwIMl-PnAt4xjoBEVU4-nkyN0NKRa9AvX4kEMfllFyIJS9CPFZAQAAAAHz4rV-uwQFg02bVnEMUFgpIdGKjM4tWuID1kTVnrjisAAAAAAA_v___wJURAIAAAAAABYAFBFys2oc0-U-bYrC3VulGLzND5fbAAAAAAAAAAAiaiDwBHLTDgAICPEgMJIBYi46xOIuFDwzJ9nOx14ngW5HbglUf65ORpkoIYcICPAgHgGWEGCDHWgscwT92NOoJ7s-ezbPkyiWr2RnYZDC_dwICPAgtffMyyLu-MscJsDc0dzwGspwSrrmvVAnMNgsgWhHClgICPAgMUl1OfBDUwhp5VZjHwVA0nuz1F5HZTUJCHAnM1L1F3MICPAgStK7UWpnrUueV5EaE7uE0y6BLMp6EANmrbhrTqEBZu8ICPAg5LVW7IHtUL5mNOvPx1hOTfLMmqlQ7t9EFW-KDtrISIQICPAgABgXZ6upFU8qiDQKFtQFpqkjKwl0PsxM4JUjVLlDKbkICPAgEwb96FiOhjlbwI8GFZQ4a5GXwxs4bUdqVOMKrtBWV30ICPEgqBg-wp0c8CAPV9k6J7wIa9_GtQfpWmhpE1zqFZyi2pQICPAg2pZLTVPGJbriiz0UhMytYDVYAXOgQnWDcrMOewK9O8cICPEgxm3QwzbvT4siJzubQGnST67bWv-exYwSPP1KDi7CaUwICPEgm6udUudfjUaM0gUFTylKGDMypj7ptMTG0zmxd_T5yTcICPAgMpOInkjFCVp1pOZhfZnyPAl8hdWGmHzQcrGLgLwSKLgICAAFiJYNc9cZAQPzpjs"],"envelope":["AE9wZW5UaW1lc3RhbXBzAABQcm9vZgC_ieLohOiSlAEIkGeg_CfuBWQsUKUwxPp5kXuihkoLAmT-5r3E14Z_JzPxIJBRSuH9YyxPNNviQy3kOh2T8nM9vEV17WxZkGK8SLOLCPAgg3TJLyWFnjv3ZJOZ9iaSaaeQSPIK5tX91XgVm8GLBt0I8SBjx6iA7MUbbVJsqojWF9_JWmQNWE3-3kBFCwSas0Gg2gjxIE2lgPgNyrj_Y1uL_qt4fAWw5H9r_CNlUtDd4roT6OMUCPEghAgoGIkd7lV7VYrvQ7xj-6Oq24PA0NhzgfZuA2KF0xgI8CAyLNPQHlwXsO8Zbzwm_lQDxUkLVt3wZoyYThjwMWonSAjwIC_Gba7HRql5FYyT9X5PObagnwcrViXVIuGyziSpunbtCPEgk0jawVpf5QClliidHPo8W5ZfByRzF4yUE2LGRzo296cI8SA2AWlsr6OtzkJEYtRd4vkA1WvJDOR5VTRovvQJKclq5QjxICknnLxa8xs8qmAdhtb0NnANbtwYyrlRTgqcMVLLl8ogCPEgHd9u6OIGCvUV12A1B1xdiOprSJ-4w0cqwfe7CzVX5HsI8CDQo_sIWZiWXaTGRSQBLmU-lHJKskYKqsjO1r02DhB8LAj_8Ajn9YmozHwo9QjwEJ46aM9ZDv3TdtqV3ZbRsNgI8SBOF8pILGf1kodr5MKmQs6Cd93joraGn3g6UPt_-kewPwjwIOG-gmM7bd_eR4AiDMNfluS3xvr7vicLR-sCBr5qtG2cCPAgrVNFrCoeQcCxhlmnE0BzHgR8HQpZAlfqzDDFzfWb8GUI8QRq0WWT8AjZJ2cF_c7k8ACD3-MNLvkMjiwraHR0cHM6Ly9ib2IuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZ_AI9ZMS1zxd7IEI8BDd00WgJZ0RncsC1Fyai_4aCPEgvxMFrnu7F05IW5INiraQ3OVEYMjNx6JfBxw1Q4jPLi4I8QRq0WWS8Ag2zxPAtI5JsP8Ag9_jDS75DI4uLWh0dHBzOi8vYWxpY2UuYnRjLmNhbGVuZGFyLm9wZW50aW1lc3RhbXBzLm9yZwjxIHAnv4KFFf4uiYEFJvLxiMxSyz8VowJP4roTfDD9h7bICPAgj5tgvbNF7mxSP4jGGE66ezUFRLnI4g1VTkvuV4VtCPAI8CCxlc1HuKORuHgn7DYIYcDhc4oo99OkTWBEvddBypoa7AjwIFcjjaF8kDNDYCZGaNISlRjvX-I7in-QNwsr4JYQbFJvCPAgnl0k4gs7LuY5i1umiHO-J7My3uBThLJUWQoY9LdVSrQI8SA6-Ft11_K_GqMNWYhkVsVqCFvXSYbp4S8JoLsLBnUzvgjxIBC8_mAE7JBP35SNxDBcG7joLJwURpMxdV2vSO64_jEOCPEge04Coj1xSi7CE8UwqiBGNhPyZ5QdD_YZwn-heSdObU4I8SBgdDSgr3VUx1j8m_pK7-OzMwwFgXeLy43ujffCv-hf5AjwIMl-PnAt4xjoBEVU4-nkyN0NKRa9AvX4kEMfllFyIJS9CPFZAQAAAAHz4rV-uwQFg02bVnEMUFgpIdGKjM4tWuID1kTVnrjisAAAAAAA_v___wJURAIAAAAAABYAFBFys2oc0-U-bYrC3VulGLzND5fbAAAAAAAAAAAiaiDwBHLTDgAICPEgMJIBYi46xOIuFDwzJ9nOx14ngW5HbglUf65ORpkoIYcICPAgHgGWEGCDHWgscwT92NOoJ7s-ezbPkyiWr2RnYZDC_dwICPAgtffMyyLu-MscJsDc0dzwGspwSrrmvVAnMNgsgWhHClgICPAgMUl1OfBDUwhp5VZjHwVA0nuz1F5HZTUJCHAnM1L1F3MICPAgStK7UWpnrUueV5EaE7uE0y6BLMp6EANmrbhrTqEBZu8ICPAg5LVW7IHtUL5mNOvPx1hOTfLMmqlQ7t9EFW-KDtrISIQICPAgABgXZ6upFU8qiDQKFtQFpqkjKwl0PsxM4JUjVLlDKbkICPAgEwb96FiOhjlbwI8GFZQ4a5GXwxs4bUdqVOMKrtBWV30ICPEgqBg-wp0c8CAPV9k6J7wIa9_GtQfpWmhpE1zqFZyi2pQICPAg2pZLTVPGJbriiz0UhMytYDVYAXOgQnWDcrMOewK9O8cICPEgxm3QwzbvT4siJzubQGnST67bWv-exYwSPP1KDi7CaUwICPEgm6udUudfjUaM0gUFTylKGDMypj7ptMTG0zmxd_T5yTcICPAgMpOInkjFCVp1pOZhfZnyPAl8hdWGmHzQcrGLgLwSKLgICAAFiJYNc9cZAQPzpjs"]},"log":{"leaf_index":"3330","tree_size":"3804","proof":["b3c10b2115a6985b1350e2caed44514fec066581278edc3099f347266e66ca7e","cc70467db1ab93dd720e2fe379f56b880bfa7e565c93ff7acb8f7c6009e4659a","206488e4b292442e711f321f31e224fde99bbf16fc1eb64d9ac9234fb7ed2c7f","57197457506ce7d4f0657378a15a39507d3142a0b70ce5d868a05686f22a0b9c","a3c0f51485e9092f4a47cf000a71bafec5af135402740e07c6d94ce4dcf66385","f128b8653a2a611002a82dfc80adcb9859644c5085cab8777b02afe5b9785bd5","f53e55cbf0c3a29497278a68db662e4165ddf338dc5ab74121e2097cae8d3b55","f543c2acee32c00eed64ca6a002c4cdf20cd84f300a60f431863f4556659c7bc","5bc8f1bbb7a36ffa2afc301ec767424419006f77d79dfc7ac3adb0dab9eb36e8","98b5a14b42b3a202b6ef825f66833fa505601404c4c0f14575f3ec922607a858","af34d80d0065c0ab502282775e865492e2cb49c9493f4594d63ba5577922854a","3c578dccc15502c5f3efe228cadc99fee76ab536ed01f66b14d316fdcc157429"],"checkpoint":"pubphys.com/log/v1\n3804\nAK6t4qgu96+M9wScTrIlsJ10d/zhKVEtYguyM3aeJvo=\n\n— pubphys.com/log/v1 JFPwIPP8EtoxgcsQg7V7CwIdL4UKPqJtpv+eB8sFNJjyQHIdyA1VabmBsPyLqq2bLxJPn57rA6fQi8y0QDDjRXHvlQg=\n","promise":"pubphys.com/log/v1 promise\n28887070a79584f85bb0e378f915bfba024407814b4ce4632bcca152ebd0e92e\n3330\n2026-10-15T23:43:57Z\n2026-10-16T01:43:57Z\n\n— pubphys.com/log/v1 JFPwIP2LsWMt5+JOKMV7/vZUTU13bwZ+hGho1Cf5lpyTxA536xGlG4MnlWb87U8K/FnDVe4uCqSYNYKUjj99+BkrbQE=\n"},"orcid_key_evidence":[],"attesting":null}