{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:DDFGL4IIXJ5LRHPGADDKHWGX5U","short_pith_number":"pith:DDFGL4II","canonical_record":{"source":{"id":"1608.03348","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-11T02:09:30Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"5ef105673165d2418f2b79370a49f64170e7b995438d9741e890130cc775453a","abstract_canon_sha256":"3fdfa17c882116145375c5f66bbcf30dcf82f6fc682d203d59ac1a61e6b9b7dd"},"schema_version":"1.0"},"canonical_sha256":"18ca65f108ba7ab89de600c6a3d8d7ed2a45095bb8bc4c59bc70fa02435818f3","source":{"kind":"arxiv","id":"1608.03348","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.03348","created_at":"2026-05-18T00:54:34Z"},{"alias_kind":"arxiv_version","alias_value":"1608.03348v1","created_at":"2026-05-18T00:54:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.03348","created_at":"2026-05-18T00:54:34Z"},{"alias_kind":"pith_short_12","alias_value":"DDFGL4IIXJ5L","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"DDFGL4IIXJ5LRHPG","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"DDFGL4II","created_at":"2026-05-18T12:30:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:DDFGL4IIXJ5LRHPGADDKHWGX5U","target":"record","payload":{"canonical_record":{"source":{"id":"1608.03348","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-11T02:09:30Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"5ef105673165d2418f2b79370a49f64170e7b995438d9741e890130cc775453a","abstract_canon_sha256":"3fdfa17c882116145375c5f66bbcf30dcf82f6fc682d203d59ac1a61e6b9b7dd"},"schema_version":"1.0"},"canonical_sha256":"18ca65f108ba7ab89de600c6a3d8d7ed2a45095bb8bc4c59bc70fa02435818f3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:54:34.930144Z","signature_b64":"+kZFwVoIeGNv4ag+5DHiHWp1JvOs9vxRJTQ9suML4MJcArSg3sMCzFLWK67Ld49O+LeGhp7HviwBnK9tMqDzDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"18ca65f108ba7ab89de600c6a3d8d7ed2a45095bb8bc4c59bc70fa02435818f3","last_reissued_at":"2026-05-18T00:54:34.929480Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:54:34.929480Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.03348","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:54:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MuWVduPA+LvAX8axeu0YFhNX2iX7PIhOlX07Qplem02L/fFf9MIf+J62U+p06p6L7sr1WtF5W1bU096bYPO7Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T21:03:39.456455Z"},"content_sha256":"8b7f9d454340c0a418d3e1d220ed047e131e9049574d97b2326a38acd9510cb8","schema_version":"1.0","event_id":"sha256:8b7f9d454340c0a418d3e1d220ed047e131e9049574d97b2326a38acd9510cb8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:DDFGL4IIXJ5LRHPGADDKHWGX5U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Parametrization of the nucleus-nucleus gamma-ray production cross sections below 100 GeV/nucleon: Subthreshold pions and Hard photons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"astro-ph.HE","authors_text":"Ervin Kafexhiu","submitted_at":"2016-08-11T02:09:30Z","abstract_excerpt":"\"Subthreshold pions\" and so-called \"hard photons\" are two important channels for producing less than 1 GeV $\\gamma$-rays and $e^\\pm$ pairs from nuclear collisions with energy per nucleon below the $\\pi$-meson production threshold. I use publicly available experimental data to parametrize these two channels' $\\gamma$-ray and $e^\\pm$ production cross sections and extend the pion contribution to these particles spectra at higher energies using their corresponding spectra from $pp$ interactions. These parametrizations are valid for collision energy $T_p\\leq 100$ A GeV and agree reasonably well wit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.03348","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:54:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ww51ktG8fERprkTFCasWH7xgpd3+X9a+ikABMS6EHUrUVjz9iQfyzdzwenJNi0pj5rD8oy60ymg7VPtS0ArmAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T21:03:39.456813Z"},"content_sha256":"ee10ed13dc6f15de30cfdad470f72f81c98cc022d190e4fadd45dfb0b91a12a2","schema_version":"1.0","event_id":"sha256:ee10ed13dc6f15de30cfdad470f72f81c98cc022d190e4fadd45dfb0b91a12a2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DDFGL4IIXJ5LRHPGADDKHWGX5U/bundle.json","state_url":"https://pith.science/pith/DDFGL4IIXJ5LRHPGADDKHWGX5U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DDFGL4IIXJ5LRHPGADDKHWGX5U/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":"2026-08-03T21:03:39Z","links":{"resolver":"https://pith.science/pith/DDFGL4IIXJ5LRHPGADDKHWGX5U","bundle":"https://pith.science/pith/DDFGL4IIXJ5LRHPGADDKHWGX5U/bundle.json","state":"https://pith.science/pith/DDFGL4IIXJ5LRHPGADDKHWGX5U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DDFGL4IIXJ5LRHPGADDKHWGX5U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:DDFGL4IIXJ5LRHPGADDKHWGX5U","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":"3fdfa17c882116145375c5f66bbcf30dcf82f6fc682d203d59ac1a61e6b9b7dd","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-11T02:09:30Z","title_canon_sha256":"5ef105673165d2418f2b79370a49f64170e7b995438d9741e890130cc775453a"},"schema_version":"1.0","source":{"id":"1608.03348","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.03348","created_at":"2026-05-18T00:54:34Z"},{"alias_kind":"arxiv_version","alias_value":"1608.03348v1","created_at":"2026-05-18T00:54:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.03348","created_at":"2026-05-18T00:54:34Z"},{"alias_kind":"pith_short_12","alias_value":"DDFGL4IIXJ5L","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"DDFGL4IIXJ5LRHPG","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"DDFGL4II","created_at":"2026-05-18T12:30:12Z"}],"graph_snapshots":[{"event_id":"sha256:ee10ed13dc6f15de30cfdad470f72f81c98cc022d190e4fadd45dfb0b91a12a2","target":"graph","created_at":"2026-05-18T00:54:34Z","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":"\"Subthreshold pions\" and so-called \"hard photons\" are two important channels for producing less than 1 GeV $\\gamma$-rays and $e^\\pm$ pairs from nuclear collisions with energy per nucleon below the $\\pi$-meson production threshold. I use publicly available experimental data to parametrize these two channels' $\\gamma$-ray and $e^\\pm$ production cross sections and extend the pion contribution to these particles spectra at higher energies using their corresponding spectra from $pp$ interactions. These parametrizations are valid for collision energy $T_p\\leq 100$ A GeV and agree reasonably well wit","authors_text":"Ervin Kafexhiu","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-11T02:09:30Z","title":"Parametrization of the nucleus-nucleus gamma-ray production cross sections below 100 GeV/nucleon: Subthreshold pions and Hard photons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.03348","kind":"arxiv","version":1},"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":"sha256:8b7f9d454340c0a418d3e1d220ed047e131e9049574d97b2326a38acd9510cb8","target":"record","created_at":"2026-05-18T00:54:34Z","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":"3fdfa17c882116145375c5f66bbcf30dcf82f6fc682d203d59ac1a61e6b9b7dd","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-11T02:09:30Z","title_canon_sha256":"5ef105673165d2418f2b79370a49f64170e7b995438d9741e890130cc775453a"},"schema_version":"1.0","source":{"id":"1608.03348","kind":"arxiv","version":1}},"canonical_sha256":"18ca65f108ba7ab89de600c6a3d8d7ed2a45095bb8bc4c59bc70fa02435818f3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"18ca65f108ba7ab89de600c6a3d8d7ed2a45095bb8bc4c59bc70fa02435818f3","first_computed_at":"2026-05-18T00:54:34.929480Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:54:34.929480Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+kZFwVoIeGNv4ag+5DHiHWp1JvOs9vxRJTQ9suML4MJcArSg3sMCzFLWK67Ld49O+LeGhp7HviwBnK9tMqDzDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:54:34.930144Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.03348","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8b7f9d454340c0a418d3e1d220ed047e131e9049574d97b2326a38acd9510cb8","sha256:ee10ed13dc6f15de30cfdad470f72f81c98cc022d190e4fadd45dfb0b91a12a2"],"state_sha256":"66434d8c5973342dcb1e0cfd1d2908413be222df3781cc7344078fc09964912d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4a794cBN1aa+RbS6pTg1LoBW9ID8fizzCeMtWyDWXSG7eFyJ6BDN1+3z5koz2r7mvc/l/TNyxJpFHRpGhUeSBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T21:03:39.459654Z","bundle_sha256":"57743291ca903147b21b2e49977a20947824ff67bdbd0af127ac7fcb295b3a6f"}}