{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:XTYNCT2GR2J343VY6WRFCIPE4R","short_pith_number":"pith:XTYNCT2G","schema_version":"1.0","canonical_sha256":"bcf0d14f468e93be6eb8f5a25121e4e46ba708c217f6010a09107168d12b29ee","source":{"kind":"arxiv","id":"1812.03023","version":2},"attestation_state":"computed","paper":{"title":"Near-threshold $\\pi^-$ photoproduction on the deuteron","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. E. Kudryavtsev, B. Oussena, B. Schr\\\"oder, B. Seitz, B. Strandberg, D. G. Middleton, D. I. Glazier, D. O'Donnell, E. J. Downie, F. Cividini, G. Feldman, G. V. O'Rielly, I. I. Strakovsky, J. Brudvik, J. R. M. Annand, K. England, K. G. Fissum, K. Hamilton, K. Hansen, L. Clark, L. Isaksson, L. S. Myers, M. A. Kovash, M. F. Preston, M. Lundin, M. Meshkian, M. Taragin, R. Al Jebali, S. Lipschutz, V. E. Tarasov, V. Lensky, W. J. Briscoe","submitted_at":"2018-12-07T13:28:40Z","abstract_excerpt":"The first experimental investigation of the near-threshold cross section for incoherent $\\pi^-$ photoproduction on the deuteron $\\gamma$ d -> $\\pi^-$ pp is presented. The experimental technique involved detection of the ~131 MeV gamma ray resulting from the radiative capture of photoproduced $\\pi^-$ in the target. The total cross section has been measured using an unpolarized tagged-photon beam, a liquid-deuterium target, and three very large NaI(Tl) spectrometers. The data are compared to theoretical models that give insight into the elementary reaction $\\gamma$ n -> $\\pi^-$ p and pion-nucleo"},"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":"1812.03023","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2018-12-07T13:28:40Z","cross_cats_sorted":[],"title_canon_sha256":"ff846d0a65de3cc72fcc21b4d187bad5ea0dd2a608f9c0edffd22948df5acc2a","abstract_canon_sha256":"349d83ae75eeb4999ba90dc53dde3fbdd16cc50696da01e8ae43a1a9e329ab86"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:50:00.826837Z","signature_b64":"aHQewONqMJTdEpSULiaDmUz36QMmNjVHubE1KyaHAn3BPw5qfknKwlftJng85Bh7b9sRCkGaXtPFKzFwun84Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bcf0d14f468e93be6eb8f5a25121e4e46ba708c217f6010a09107168d12b29ee","last_reissued_at":"2026-07-05T00:50:00.826340Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:50:00.826340Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Near-threshold $\\pi^-$ photoproduction on the deuteron","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. E. Kudryavtsev, B. Oussena, B. Schr\\\"oder, B. Seitz, B. Strandberg, D. G. Middleton, D. I. Glazier, D. O'Donnell, E. J. Downie, F. Cividini, G. Feldman, G. V. O'Rielly, I. I. Strakovsky, J. Brudvik, J. R. M. Annand, K. England, K. G. Fissum, K. Hamilton, K. Hansen, L. Clark, L. Isaksson, L. S. Myers, M. A. Kovash, M. F. Preston, M. Lundin, M. Meshkian, M. Taragin, R. Al Jebali, S. Lipschutz, V. E. Tarasov, V. Lensky, W. J. Briscoe","submitted_at":"2018-12-07T13:28:40Z","abstract_excerpt":"The first experimental investigation of the near-threshold cross section for incoherent $\\pi^-$ photoproduction on the deuteron $\\gamma$ d -> $\\pi^-$ pp is presented. The experimental technique involved detection of the ~131 MeV gamma ray resulting from the radiative capture of photoproduced $\\pi^-$ in the target. The total cross section has been measured using an unpolarized tagged-photon beam, a liquid-deuterium target, and three very large NaI(Tl) spectrometers. The data are compared to theoretical models that give insight into the elementary reaction $\\gamma$ n -> $\\pi^-$ p and pion-nucleo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.03023","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/1812.03023/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1812.03023","created_at":"2026-07-05T00:50:00.826392+00:00"},{"alias_kind":"arxiv_version","alias_value":"1812.03023v2","created_at":"2026-07-05T00:50:00.826392+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.03023","created_at":"2026-07-05T00:50:00.826392+00:00"},{"alias_kind":"pith_short_12","alias_value":"XTYNCT2GR2J3","created_at":"2026-07-05T00:50:00.826392+00:00"},{"alias_kind":"pith_short_16","alias_value":"XTYNCT2GR2J343VY","created_at":"2026-07-05T00:50:00.826392+00:00"},{"alias_kind":"pith_short_8","alias_value":"XTYNCT2G","created_at":"2026-07-05T00:50:00.826392+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/XTYNCT2GR2J343VY6WRFCIPE4R","json":"https://pith.science/pith/XTYNCT2GR2J343VY6WRFCIPE4R.json","graph_json":"https://pith.science/api/pith-number/XTYNCT2GR2J343VY6WRFCIPE4R/graph.json","events_json":"https://pith.science/api/pith-number/XTYNCT2GR2J343VY6WRFCIPE4R/events.json","paper":"https://pith.science/paper/XTYNCT2G"},"agent_actions":{"view_html":"https://pith.science/pith/XTYNCT2GR2J343VY6WRFCIPE4R","download_json":"https://pith.science/pith/XTYNCT2GR2J343VY6WRFCIPE4R.json","view_paper":"https://pith.science/paper/XTYNCT2G","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1812.03023&json=true","fetch_graph":"https://pith.science/api/pith-number/XTYNCT2GR2J343VY6WRFCIPE4R/graph.json","fetch_events":"https://pith.science/api/pith-number/XTYNCT2GR2J343VY6WRFCIPE4R/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/XTYNCT2GR2J343VY6WRFCIPE4R/action/timestamp_anchor","attest_storage":"https://pith.science/pith/XTYNCT2GR2J343VY6WRFCIPE4R/action/storage_attestation","attest_author":"https://pith.science/pith/XTYNCT2GR2J343VY6WRFCIPE4R/action/author_attestation","sign_citation":"https://pith.science/pith/XTYNCT2GR2J343VY6WRFCIPE4R/action/citation_signature","submit_replication":"https://pith.science/pith/XTYNCT2GR2J343VY6WRFCIPE4R/action/replication_record"}},"created_at":"2026-07-05T00:50:00.826392+00:00","updated_at":"2026-07-05T00:50:00.826392+00:00"}