{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:3MDWMVEC5PIZ7F3BLUGD6HVR2N","short_pith_number":"pith:3MDWMVEC","schema_version":"1.0","canonical_sha256":"db07665482ebd19f97615d0c3f1eb1d34a3fb19355c18066956c62a05c075785","source":{"kind":"arxiv","id":"1401.7481","version":1},"attestation_state":"computed","paper":{"title":"Quasi-free photoproduction of pion-pairs off protons and neutrons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","nucl-ex"],"primary_cat":"physics.acc-ph","authors_text":"B. Krusche, M. Oberle","submitted_at":"2014-01-29T12:12:48Z","abstract_excerpt":"Beam-helicity asymmetries and mass-differential cross sections have been measured at the MAMI accelerator in Mainz for the photoproduction of neutral and mixed-charge pion pairs in the reactions $\\boldsymbol{\\gamma}p\\rightarrow n\\pi^0\\pi^+$ and $\\boldsymbol{\\gamma}p\\rightarrow p\\pi^0\\pi^0$ off free protons and $\\boldsymbol{\\gamma}d \\rightarrow (p)p\\pi^0\\pi^-$, $\\boldsymbol{\\gamma}d\\rightarrow (n)p\\pi^0\\pi^0$ and $\\boldsymbol{\\gamma}d\\rightarrow (n)n\\pi^0\\pi^+$, $\\boldsymbol{\\gamma}d\\rightarrow (p)n \\pi^0\\pi^0$ off quasi-free nucleons bound in the deuteron for incident photon energies up to 1.4"},"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":"1401.7481","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.acc-ph","submitted_at":"2014-01-29T12:12:48Z","cross_cats_sorted":["hep-ex","nucl-ex"],"title_canon_sha256":"0712359608e3693914f9aaf5307a25dea70aa1cb812fa4095be30c3ff91da95b","abstract_canon_sha256":"98e3b04fddcd5a13cf39a8d42059a971c49f1b339659c63999398776ab53e062"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:00:48.271991Z","signature_b64":"xhhfeq1Ujy+AUyA3K88dC/1aD1d2QLmeiADxfSPUlfQP/ZoDl2vSFcsswWKAZW3wn+zJh8eriAy8jQsJ7GmHBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"db07665482ebd19f97615d0c3f1eb1d34a3fb19355c18066956c62a05c075785","last_reissued_at":"2026-05-18T03:00:48.271242Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:00:48.271242Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Quasi-free photoproduction of pion-pairs off protons and neutrons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","nucl-ex"],"primary_cat":"physics.acc-ph","authors_text":"B. Krusche, M. Oberle","submitted_at":"2014-01-29T12:12:48Z","abstract_excerpt":"Beam-helicity asymmetries and mass-differential cross sections have been measured at the MAMI accelerator in Mainz for the photoproduction of neutral and mixed-charge pion pairs in the reactions $\\boldsymbol{\\gamma}p\\rightarrow n\\pi^0\\pi^+$ and $\\boldsymbol{\\gamma}p\\rightarrow p\\pi^0\\pi^0$ off free protons and $\\boldsymbol{\\gamma}d \\rightarrow (p)p\\pi^0\\pi^-$, $\\boldsymbol{\\gamma}d\\rightarrow (n)p\\pi^0\\pi^0$ and $\\boldsymbol{\\gamma}d\\rightarrow (n)n\\pi^0\\pi^+$, $\\boldsymbol{\\gamma}d\\rightarrow (p)n \\pi^0\\pi^0$ off quasi-free nucleons bound in the deuteron for incident photon energies up to 1.4"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.7481","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":"1401.7481","created_at":"2026-05-18T03:00:48.271412+00:00"},{"alias_kind":"arxiv_version","alias_value":"1401.7481v1","created_at":"2026-05-18T03:00:48.271412+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.7481","created_at":"2026-05-18T03:00:48.271412+00:00"},{"alias_kind":"pith_short_12","alias_value":"3MDWMVEC5PIZ","created_at":"2026-05-18T12:28:11.866339+00:00"},{"alias_kind":"pith_short_16","alias_value":"3MDWMVEC5PIZ7F3B","created_at":"2026-05-18T12:28:11.866339+00:00"},{"alias_kind":"pith_short_8","alias_value":"3MDWMVEC","created_at":"2026-05-18T12:28:11.866339+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/3MDWMVEC5PIZ7F3BLUGD6HVR2N","json":"https://pith.science/pith/3MDWMVEC5PIZ7F3BLUGD6HVR2N.json","graph_json":"https://pith.science/api/pith-number/3MDWMVEC5PIZ7F3BLUGD6HVR2N/graph.json","events_json":"https://pith.science/api/pith-number/3MDWMVEC5PIZ7F3BLUGD6HVR2N/events.json","paper":"https://pith.science/paper/3MDWMVEC"},"agent_actions":{"view_html":"https://pith.science/pith/3MDWMVEC5PIZ7F3BLUGD6HVR2N","download_json":"https://pith.science/pith/3MDWMVEC5PIZ7F3BLUGD6HVR2N.json","view_paper":"https://pith.science/paper/3MDWMVEC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1401.7481&json=true","fetch_graph":"https://pith.science/api/pith-number/3MDWMVEC5PIZ7F3BLUGD6HVR2N/graph.json","fetch_events":"https://pith.science/api/pith-number/3MDWMVEC5PIZ7F3BLUGD6HVR2N/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3MDWMVEC5PIZ7F3BLUGD6HVR2N/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3MDWMVEC5PIZ7F3BLUGD6HVR2N/action/storage_attestation","attest_author":"https://pith.science/pith/3MDWMVEC5PIZ7F3BLUGD6HVR2N/action/author_attestation","sign_citation":"https://pith.science/pith/3MDWMVEC5PIZ7F3BLUGD6HVR2N/action/citation_signature","submit_replication":"https://pith.science/pith/3MDWMVEC5PIZ7F3BLUGD6HVR2N/action/replication_record"}},"created_at":"2026-05-18T03:00:48.271412+00:00","updated_at":"2026-05-18T03:00:48.271412+00:00"}