{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:D3WU5BDUYEGMLROAEVAFXHLDJE","short_pith_number":"pith:D3WU5BDU","canonical_record":{"source":{"id":"1807.00832","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-07-02T18:00:07Z","cross_cats_sorted":[],"title_canon_sha256":"1bee69402e1238b99d2d9e9a555c6826d561b70ee0dfdd50760bf8958c854c9f","abstract_canon_sha256":"979dfc876cb60f05f88c8844948faae3322b15674e9e6ee882e1ee43c25f55b2"},"schema_version":"1.0"},"canonical_sha256":"1eed4e8474c10cc5c5c025405b9d634919c4d8e41278fbaa82d3a9aeac87a361","source":{"kind":"arxiv","id":"1807.00832","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.00832","created_at":"2026-05-18T00:00:52Z"},{"alias_kind":"arxiv_version","alias_value":"1807.00832v2","created_at":"2026-05-18T00:00:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.00832","created_at":"2026-05-18T00:00:52Z"},{"alias_kind":"pith_short_12","alias_value":"D3WU5BDUYEGM","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"D3WU5BDUYEGMLROA","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"D3WU5BDU","created_at":"2026-05-18T12:32:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:D3WU5BDUYEGMLROAEVAFXHLDJE","target":"record","payload":{"canonical_record":{"source":{"id":"1807.00832","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-07-02T18:00:07Z","cross_cats_sorted":[],"title_canon_sha256":"1bee69402e1238b99d2d9e9a555c6826d561b70ee0dfdd50760bf8958c854c9f","abstract_canon_sha256":"979dfc876cb60f05f88c8844948faae3322b15674e9e6ee882e1ee43c25f55b2"},"schema_version":"1.0"},"canonical_sha256":"1eed4e8474c10cc5c5c025405b9d634919c4d8e41278fbaa82d3a9aeac87a361","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:00:52.549401Z","signature_b64":"cT/YR0/oOSJmCJSaO6AbHiHHr+GaIh/r9EZeVA+pxdnEd5HJQnue+F3mJgZRcIo3kysM4AK+yCGdoCV0STyZCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1eed4e8474c10cc5c5c025405b9d634919c4d8e41278fbaa82d3a9aeac87a361","last_reissued_at":"2026-05-18T00:00:52.548690Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:00:52.548690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.00832","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:00:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HHbKyGRdYdHTDhB15NrUy0f6Rd0xQeWaxf9yVKK0nOSqf9tfkQuR+zJXozO0gy/em1+5FBdVG0a147nvIIPuAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T13:12:25.473033Z"},"content_sha256":"52c04d9045b81f84290f209a61e3286673a58ec776bd22e0587fb732bf3abc8e","schema_version":"1.0","event_id":"sha256:52c04d9045b81f84290f209a61e3286673a58ec776bd22e0587fb732bf3abc8e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:D3WU5BDUYEGMLROAEVAFXHLDJE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low-Temperature Enhancement of Semi-annihilation and the AMS-02 Positron Anomaly","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Andrew Spray, Yi Cai","submitted_at":"2018-07-02T18:00:07Z","abstract_excerpt":"Semi-annihilation is a generic feature of particle dark matter that is most easily probed by cosmic ray experiments. We explore models where the semi-annihilation cross section is enhanced at late times and low temperatures by the presence of an s-channel resonance near threshold. The relic density is then sensitive to the evolution of the dark matter temperature, and we compute expressions for the associated Boltzmann equation valid in general semi-annihilating models. At late times, a self-heating effect warms the dark matter, allowing number-changing processes to remain effective long after"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.00832","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:00:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RxG5LX2TKhKxW8W6xK6Uexq5IuBLO59wQr67ZkTPYcdMm30x+Gs0JiCvw+ZB4bVngF3RFYKWlVn94DT4r41uDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T13:12:25.473398Z"},"content_sha256":"fd9f31d8c12b812bb7b288e070e63963339763057e1bf693fd5e20b20cf811e1","schema_version":"1.0","event_id":"sha256:fd9f31d8c12b812bb7b288e070e63963339763057e1bf693fd5e20b20cf811e1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D3WU5BDUYEGMLROAEVAFXHLDJE/bundle.json","state_url":"https://pith.science/pith/D3WU5BDUYEGMLROAEVAFXHLDJE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D3WU5BDUYEGMLROAEVAFXHLDJE/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-20T13:12:25Z","links":{"resolver":"https://pith.science/pith/D3WU5BDUYEGMLROAEVAFXHLDJE","bundle":"https://pith.science/pith/D3WU5BDUYEGMLROAEVAFXHLDJE/bundle.json","state":"https://pith.science/pith/D3WU5BDUYEGMLROAEVAFXHLDJE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D3WU5BDUYEGMLROAEVAFXHLDJE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:D3WU5BDUYEGMLROAEVAFXHLDJE","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"979dfc876cb60f05f88c8844948faae3322b15674e9e6ee882e1ee43c25f55b2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-07-02T18:00:07Z","title_canon_sha256":"1bee69402e1238b99d2d9e9a555c6826d561b70ee0dfdd50760bf8958c854c9f"},"schema_version":"1.0","source":{"id":"1807.00832","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.00832","created_at":"2026-05-18T00:00:52Z"},{"alias_kind":"arxiv_version","alias_value":"1807.00832v2","created_at":"2026-05-18T00:00:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.00832","created_at":"2026-05-18T00:00:52Z"},{"alias_kind":"pith_short_12","alias_value":"D3WU5BDUYEGM","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"D3WU5BDUYEGMLROA","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"D3WU5BDU","created_at":"2026-05-18T12:32:19Z"}],"graph_snapshots":[{"event_id":"sha256:fd9f31d8c12b812bb7b288e070e63963339763057e1bf693fd5e20b20cf811e1","target":"graph","created_at":"2026-05-18T00:00:52Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Semi-annihilation is a generic feature of particle dark matter that is most easily probed by cosmic ray experiments. We explore models where the semi-annihilation cross section is enhanced at late times and low temperatures by the presence of an s-channel resonance near threshold. The relic density is then sensitive to the evolution of the dark matter temperature, and we compute expressions for the associated Boltzmann equation valid in general semi-annihilating models. At late times, a self-heating effect warms the dark matter, allowing number-changing processes to remain effective long after","authors_text":"Andrew Spray, Yi Cai","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-07-02T18:00:07Z","title":"Low-Temperature Enhancement of Semi-annihilation and the AMS-02 Positron Anomaly"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.00832","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:52c04d9045b81f84290f209a61e3286673a58ec776bd22e0587fb732bf3abc8e","target":"record","created_at":"2026-05-18T00:00:52Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"979dfc876cb60f05f88c8844948faae3322b15674e9e6ee882e1ee43c25f55b2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-07-02T18:00:07Z","title_canon_sha256":"1bee69402e1238b99d2d9e9a555c6826d561b70ee0dfdd50760bf8958c854c9f"},"schema_version":"1.0","source":{"id":"1807.00832","kind":"arxiv","version":2}},"canonical_sha256":"1eed4e8474c10cc5c5c025405b9d634919c4d8e41278fbaa82d3a9aeac87a361","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1eed4e8474c10cc5c5c025405b9d634919c4d8e41278fbaa82d3a9aeac87a361","first_computed_at":"2026-05-18T00:00:52.548690Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:52.548690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cT/YR0/oOSJmCJSaO6AbHiHHr+GaIh/r9EZeVA+pxdnEd5HJQnue+F3mJgZRcIo3kysM4AK+yCGdoCV0STyZCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:52.549401Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.00832","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:52c04d9045b81f84290f209a61e3286673a58ec776bd22e0587fb732bf3abc8e","sha256:fd9f31d8c12b812bb7b288e070e63963339763057e1bf693fd5e20b20cf811e1"],"state_sha256":"507829e77ebbc059b5302ff570657e8919347d3b64e95759007e8bb0905c9453"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e5VWOmU8X44w4OLAvxJT8JEaRZQujh9OK89Y6AYsA+3KNpRr46D8ldYak3B+WIjtPX7nS2wUadkZ6ZoWP3+aBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T13:12:25.475305Z","bundle_sha256":"5b9de673b349828f3836b4ad313c0372ba0fdf446407c62030c6be8277c3b1c0"}}