{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:GFQC5UXHRWSJD5L3HQHKHZ22AI","short_pith_number":"pith:GFQC5UXH","schema_version":"1.0","canonical_sha256":"31602ed2e78da491f57b3c0ea3e75a02017f9a8c0271eff0215df616e025627e","source":{"kind":"arxiv","id":"1105.1111","version":1},"attestation_state":"computed","paper":{"title":"Disappointing model for ultrahigh-energy cosmic rays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Gazizov, R. Aloisio, V. Berezinsky","submitted_at":"2011-05-05T16:01:44Z","abstract_excerpt":"Data of Pierre Auger Observatory show a proton-dominated chemical composition of ultrahigh-energy cosmic rays spectrum at (1 - 3) EeV and a steadily heavier composition with energy increasing. In order to explain this feature we assume that (1 - 3) EeV protons are extragalactic and derive their maximum acceleration energy, E_p^{max} \\simeq 4 EeV, compatible with both the spectrum and the composition. We also assume the rigidity-dependent acceleration mechanism of heavier nuclei, E_A^{max} = Z x E_p^{max}. The proposed model has rather disappointing consequences: i) no pion photo-production on "},"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":"1105.1111","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-05-05T16:01:44Z","cross_cats_sorted":[],"title_canon_sha256":"4b3c3990f1d9e0c390eec177ba065766a286b6db1c29ff28c2e8078db73b16ab","abstract_canon_sha256":"3b88bbbca01e9448acc10f9416af41168f863e25e54e8b015fe3b66c6da493d4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:45:01.131763Z","signature_b64":"w0yZSUj5LXAU7xCyTfgnnsOmycdMSGh2O1bsUwQoTzd9UslKn24l7hha4zkquULKOzcXv0bckAYWecQqU17KDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"31602ed2e78da491f57b3c0ea3e75a02017f9a8c0271eff0215df616e025627e","last_reissued_at":"2026-05-18T03:45:01.130981Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:45:01.130981Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Disappointing model for ultrahigh-energy cosmic rays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Gazizov, R. Aloisio, V. Berezinsky","submitted_at":"2011-05-05T16:01:44Z","abstract_excerpt":"Data of Pierre Auger Observatory show a proton-dominated chemical composition of ultrahigh-energy cosmic rays spectrum at (1 - 3) EeV and a steadily heavier composition with energy increasing. In order to explain this feature we assume that (1 - 3) EeV protons are extragalactic and derive their maximum acceleration energy, E_p^{max} \\simeq 4 EeV, compatible with both the spectrum and the composition. We also assume the rigidity-dependent acceleration mechanism of heavier nuclei, E_A^{max} = Z x E_p^{max}. The proposed model has rather disappointing consequences: i) no pion photo-production on "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.1111","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":"1105.1111","created_at":"2026-05-18T03:45:01.131085+00:00"},{"alias_kind":"arxiv_version","alias_value":"1105.1111v1","created_at":"2026-05-18T03:45:01.131085+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.1111","created_at":"2026-05-18T03:45:01.131085+00:00"},{"alias_kind":"pith_short_12","alias_value":"GFQC5UXHRWSJ","created_at":"2026-05-18T12:26:28.662955+00:00"},{"alias_kind":"pith_short_16","alias_value":"GFQC5UXHRWSJD5L3","created_at":"2026-05-18T12:26:28.662955+00:00"},{"alias_kind":"pith_short_8","alias_value":"GFQC5UXH","created_at":"2026-05-18T12:26:28.662955+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/GFQC5UXHRWSJD5L3HQHKHZ22AI","json":"https://pith.science/pith/GFQC5UXHRWSJD5L3HQHKHZ22AI.json","graph_json":"https://pith.science/api/pith-number/GFQC5UXHRWSJD5L3HQHKHZ22AI/graph.json","events_json":"https://pith.science/api/pith-number/GFQC5UXHRWSJD5L3HQHKHZ22AI/events.json","paper":"https://pith.science/paper/GFQC5UXH"},"agent_actions":{"view_html":"https://pith.science/pith/GFQC5UXHRWSJD5L3HQHKHZ22AI","download_json":"https://pith.science/pith/GFQC5UXHRWSJD5L3HQHKHZ22AI.json","view_paper":"https://pith.science/paper/GFQC5UXH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1105.1111&json=true","fetch_graph":"https://pith.science/api/pith-number/GFQC5UXHRWSJD5L3HQHKHZ22AI/graph.json","fetch_events":"https://pith.science/api/pith-number/GFQC5UXHRWSJD5L3HQHKHZ22AI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GFQC5UXHRWSJD5L3HQHKHZ22AI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GFQC5UXHRWSJD5L3HQHKHZ22AI/action/storage_attestation","attest_author":"https://pith.science/pith/GFQC5UXHRWSJD5L3HQHKHZ22AI/action/author_attestation","sign_citation":"https://pith.science/pith/GFQC5UXHRWSJD5L3HQHKHZ22AI/action/citation_signature","submit_replication":"https://pith.science/pith/GFQC5UXHRWSJD5L3HQHKHZ22AI/action/replication_record"}},"created_at":"2026-05-18T03:45:01.131085+00:00","updated_at":"2026-05-18T03:45:01.131085+00:00"}