{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2001:H74ERVOHVGW5XG2GBCA3U2B445","short_pith_number":"pith:H74ERVOH","schema_version":"1.0","canonical_sha256":"3ff848d5c7a9addb9b460881ba683ce7613cb97cfcac550bd15b6599bb2cab99","source":{"kind":"arxiv","id":"nucl-ex/0112015","version":1},"attestation_state":"computed","paper":{"title":"Backward spin polarizability $\\gamma_\\pi$ of the proton","license":"","headline":"","cross_cats":["hep-ex","hep-ph"],"primary_cat":"nucl-ex","authors_text":"A.I. L'vov, A. Natter, A. Thomas, B. Seitz, F. Smend, F. Wissmann, F. Zapadtka, G. Caselotti, H.-J. Arends, J. Ahrens, J.C. McGeorge, K. Kossert, M. Camen, M.I. Levchuk, M. Schumacher, O. Jahn, P.D. Harty, P. Grabmayr, P. Jennenwein, R. Beck, R. Kondratiev, V. Lisin, V. Olmos de Le\\'on, W. Weihofen","submitted_at":"2001-12-28T11:45:24Z","abstract_excerpt":"Using the Mainz $48 cm {\\O}\\times 64 cm$ NaI(Tl) detector and the segmented G\\\"ottingen recoil detector SENECA in coincidence, Compton scattering by the proton at $\\theta^{lab}_\\gamma = 136^\\circ$ has been measured at MAMI (Mainz) in the energy range from 200 to 470 MeV. The new data confirm the previous observation that there is a systematic discrepancy between MAMI and LEGS (Brookhaven) data leading to different spin polarizabilities $\\gamma_\\pi = - 38.7 \\pm 1.8$ and $-27.2 \\pm 3.1$ $(\\times 10^{-4}fm^4)$, respectively."},"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":"nucl-ex/0112015","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-ex","submitted_at":"2001-12-28T11:45:24Z","cross_cats_sorted":["hep-ex","hep-ph"],"title_canon_sha256":"82fd1588f83e579894efda78032c557a1522aa559bf99585b348827e3a5b86ce","abstract_canon_sha256":"bea26916e197f202ab94915d920764a98e3c18ad0829668fda94db784dd119f4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:19:57.798210Z","signature_b64":"EwjseZKWPvzjU/K3AdT0W6ShEriYkNmqrG769JvL8rrOyal5vjNcWZcAQGoz5eommnhjQEQHlOjizCjnkcq1Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ff848d5c7a9addb9b460881ba683ce7613cb97cfcac550bd15b6599bb2cab99","last_reissued_at":"2026-05-18T03:19:57.797452Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:19:57.797452Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Backward spin polarizability $\\gamma_\\pi$ of the proton","license":"","headline":"","cross_cats":["hep-ex","hep-ph"],"primary_cat":"nucl-ex","authors_text":"A.I. L'vov, A. Natter, A. Thomas, B. Seitz, F. Smend, F. Wissmann, F. Zapadtka, G. Caselotti, H.-J. Arends, J. Ahrens, J.C. McGeorge, K. Kossert, M. Camen, M.I. Levchuk, M. Schumacher, O. Jahn, P.D. Harty, P. Grabmayr, P. Jennenwein, R. Beck, R. Kondratiev, V. Lisin, V. Olmos de Le\\'on, W. Weihofen","submitted_at":"2001-12-28T11:45:24Z","abstract_excerpt":"Using the Mainz $48 cm {\\O}\\times 64 cm$ NaI(Tl) detector and the segmented G\\\"ottingen recoil detector SENECA in coincidence, Compton scattering by the proton at $\\theta^{lab}_\\gamma = 136^\\circ$ has been measured at MAMI (Mainz) in the energy range from 200 to 470 MeV. The new data confirm the previous observation that there is a systematic discrepancy between MAMI and LEGS (Brookhaven) data leading to different spin polarizabilities $\\gamma_\\pi = - 38.7 \\pm 1.8$ and $-27.2 \\pm 3.1$ $(\\times 10^{-4}fm^4)$, respectively."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0112015","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"nucl-ex/0112015","created_at":"2026-05-18T03:19:57.797578+00:00"},{"alias_kind":"arxiv_version","alias_value":"nucl-ex/0112015v1","created_at":"2026-05-18T03:19:57.797578+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-ex/0112015","created_at":"2026-05-18T03:19:57.797578+00:00"},{"alias_kind":"pith_short_12","alias_value":"H74ERVOHVGW5","created_at":"2026-05-18T12:25:50.254431+00:00"},{"alias_kind":"pith_short_16","alias_value":"H74ERVOHVGW5XG2G","created_at":"2026-05-18T12:25:50.254431+00:00"},{"alias_kind":"pith_short_8","alias_value":"H74ERVOH","created_at":"2026-05-18T12:25:50.254431+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/H74ERVOHVGW5XG2GBCA3U2B445","json":"https://pith.science/pith/H74ERVOHVGW5XG2GBCA3U2B445.json","graph_json":"https://pith.science/api/pith-number/H74ERVOHVGW5XG2GBCA3U2B445/graph.json","events_json":"https://pith.science/api/pith-number/H74ERVOHVGW5XG2GBCA3U2B445/events.json","paper":"https://pith.science/paper/H74ERVOH"},"agent_actions":{"view_html":"https://pith.science/pith/H74ERVOHVGW5XG2GBCA3U2B445","download_json":"https://pith.science/pith/H74ERVOHVGW5XG2GBCA3U2B445.json","view_paper":"https://pith.science/paper/H74ERVOH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=nucl-ex/0112015&json=true","fetch_graph":"https://pith.science/api/pith-number/H74ERVOHVGW5XG2GBCA3U2B445/graph.json","fetch_events":"https://pith.science/api/pith-number/H74ERVOHVGW5XG2GBCA3U2B445/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/H74ERVOHVGW5XG2GBCA3U2B445/action/timestamp_anchor","attest_storage":"https://pith.science/pith/H74ERVOHVGW5XG2GBCA3U2B445/action/storage_attestation","attest_author":"https://pith.science/pith/H74ERVOHVGW5XG2GBCA3U2B445/action/author_attestation","sign_citation":"https://pith.science/pith/H74ERVOHVGW5XG2GBCA3U2B445/action/citation_signature","submit_replication":"https://pith.science/pith/H74ERVOHVGW5XG2GBCA3U2B445/action/replication_record"}},"created_at":"2026-05-18T03:19:57.797578+00:00","updated_at":"2026-05-18T03:19:57.797578+00:00"}