{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:Z564FLDHMMIKWXANAZU3HXL7TF","short_pith_number":"pith:Z564FLDH","schema_version":"1.0","canonical_sha256":"cf7dc2ac676310ab5c0d0669b3dd7f9970e9821f7b845dc9654f70a3c91ffab0","source":{"kind":"arxiv","id":"1507.06001","version":5},"attestation_state":"computed","paper":{"title":"Angular distribution in s-channel formation of the pentaquark $\\Theta^+$ baryon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"hep-ex","authors_text":"A.E. Asratyan, C. Curceanu, C. Guaraldo, DIANA Collaboration: V.V. Barmin, G.V. Davidenko, I.F. Larin, L.I. Sokolov, M.A. Kubantsev, N.N. Shishov, V.A. Matveev, V.A. Shebanov, V.V. Tarasov","submitted_at":"2015-07-21T21:51:31Z","abstract_excerpt":"Using the DIANA data on the charge-exchange reaction $K^+n \\rightarrow pK^0$ on a bound neutron, in which the s-channel formation of the pentaquark baryon $\\Theta^+(1538)$ has been observed, we analyze the dependence of the background-subtracted $\\Theta^+ \\rightarrow pK^0$ signal on the $K^0$ emission angle in the $pK^0$ rest frame. In order to describe the observed $\\cos\\Theta_K^\\mathrm{cms}$ distribution, invoking the interference between the nonresonant s-wave and the $\\Theta^+$-mediated higher-wave contributions to the amplitude of the charge-exchange reaction is required at a 2.8$\\sigma$ "},"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":"1507.06001","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2015-07-21T21:51:31Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"2970c33088203a51e8b7f889b9cdaac6aeaa172b8c132723f4f06d68a3634191","abstract_canon_sha256":"6fdd19edcb161ab6897ca0c1ea2ad592ecc4f4c00d24112c3e9ffb2467631212"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:38.050522Z","signature_b64":"dL9JhlRvlh8zTikb4v6oPdqkchOmhF1kSaepl/4jDfYX6wh68YzvHtv3ZcAIwhYmNPNph+EXo/mzxIkdWtvjDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cf7dc2ac676310ab5c0d0669b3dd7f9970e9821f7b845dc9654f70a3c91ffab0","last_reissued_at":"2026-05-18T01:12:38.050046Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:38.050046Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Angular distribution in s-channel formation of the pentaquark $\\Theta^+$ baryon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"hep-ex","authors_text":"A.E. Asratyan, C. Curceanu, C. Guaraldo, DIANA Collaboration: V.V. Barmin, G.V. Davidenko, I.F. Larin, L.I. Sokolov, M.A. Kubantsev, N.N. Shishov, V.A. Matveev, V.A. Shebanov, V.V. Tarasov","submitted_at":"2015-07-21T21:51:31Z","abstract_excerpt":"Using the DIANA data on the charge-exchange reaction $K^+n \\rightarrow pK^0$ on a bound neutron, in which the s-channel formation of the pentaquark baryon $\\Theta^+(1538)$ has been observed, we analyze the dependence of the background-subtracted $\\Theta^+ \\rightarrow pK^0$ signal on the $K^0$ emission angle in the $pK^0$ rest frame. In order to describe the observed $\\cos\\Theta_K^\\mathrm{cms}$ distribution, invoking the interference between the nonresonant s-wave and the $\\Theta^+$-mediated higher-wave contributions to the amplitude of the charge-exchange reaction is required at a 2.8$\\sigma$ "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.06001","kind":"arxiv","version":5},"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":"1507.06001","created_at":"2026-05-18T01:12:38.050116+00:00"},{"alias_kind":"arxiv_version","alias_value":"1507.06001v5","created_at":"2026-05-18T01:12:38.050116+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.06001","created_at":"2026-05-18T01:12:38.050116+00:00"},{"alias_kind":"pith_short_12","alias_value":"Z564FLDHMMIK","created_at":"2026-05-18T12:29:52.810259+00:00"},{"alias_kind":"pith_short_16","alias_value":"Z564FLDHMMIKWXAN","created_at":"2026-05-18T12:29:52.810259+00:00"},{"alias_kind":"pith_short_8","alias_value":"Z564FLDH","created_at":"2026-05-18T12:29:52.810259+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/Z564FLDHMMIKWXANAZU3HXL7TF","json":"https://pith.science/pith/Z564FLDHMMIKWXANAZU3HXL7TF.json","graph_json":"https://pith.science/api/pith-number/Z564FLDHMMIKWXANAZU3HXL7TF/graph.json","events_json":"https://pith.science/api/pith-number/Z564FLDHMMIKWXANAZU3HXL7TF/events.json","paper":"https://pith.science/paper/Z564FLDH"},"agent_actions":{"view_html":"https://pith.science/pith/Z564FLDHMMIKWXANAZU3HXL7TF","download_json":"https://pith.science/pith/Z564FLDHMMIKWXANAZU3HXL7TF.json","view_paper":"https://pith.science/paper/Z564FLDH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1507.06001&json=true","fetch_graph":"https://pith.science/api/pith-number/Z564FLDHMMIKWXANAZU3HXL7TF/graph.json","fetch_events":"https://pith.science/api/pith-number/Z564FLDHMMIKWXANAZU3HXL7TF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/Z564FLDHMMIKWXANAZU3HXL7TF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/Z564FLDHMMIKWXANAZU3HXL7TF/action/storage_attestation","attest_author":"https://pith.science/pith/Z564FLDHMMIKWXANAZU3HXL7TF/action/author_attestation","sign_citation":"https://pith.science/pith/Z564FLDHMMIKWXANAZU3HXL7TF/action/citation_signature","submit_replication":"https://pith.science/pith/Z564FLDHMMIKWXANAZU3HXL7TF/action/replication_record"}},"created_at":"2026-05-18T01:12:38.050116+00:00","updated_at":"2026-05-18T01:12:38.050116+00:00"}