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Ahmed","submitted_at":"2025-12-03T04:24:11Z","abstract_excerpt":"The Dalitz decay $\\pi^0 \\to e^+e^-\\gamma$ has\n  been measured with the highest statistical accuracy obtained so far in\n  the $\\gamma p\\to \\pi^0 p$ reaction with the A2 tagged-photon facility at the Mainz Microtron, MAMI.\n  The value of the slope parameter for the $\\pi^0$ electromagnetic transition form factor,\n  $a_\\pi=0.0315\\pm 0.0026_{\\mathrm{stat}}\\pm 0.0010_{\\mathrm{syst}}$,\n  is obtained from the analysis of $2.4\\times10^6$ $\\pi^0 \\to e^+e^-\\gamma$ observed decays.\n  Within experimental uncertainties, it is in agreement with existing measurements and\n  theoretical calculations, with its o"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2512.03431","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ex","submitted_at":"2025-12-03T04:24:11Z","cross_cats_sorted":[],"title_canon_sha256":"659ac086c7c9086ae381cd978f157f01147ab95ba8659cbb2d9e4697949ae71c","abstract_canon_sha256":"93820a6d6fd6f669c49222b480dc47dd5c701a341574765ecf808d9525386bba"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-10T01:09:48.916520Z","signature_b64":"7STHYjqXg3b8mQAJtbn37g9Z0OU71YTGA8Alt34r963OPCYP5L/fLE3i5pFrTOg5tmdfqKY5bzcxgay8s2YtAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"76b01be08a30712459b125ad9646bbbada65788b719f9bb70ceeacc53662ff9b","last_reissued_at":"2026-06-10T01:09:48.915456Z","signature_status":"signed_v1","first_computed_at":"2026-06-10T01:09:48.915456Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"New high-statistics measurement of the $\\pi^0 \\to e^+e^-\\gamma$ Dalitz decay at the Mainz Microtron","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. 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