{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:Z4A7YGHCXSHNMP6XZPA7RHVW3L","short_pith_number":"pith:Z4A7YGHC","canonical_record":{"source":{"id":"1608.02425","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-08-08T13:40:39Z","cross_cats_sorted":["astro-ph.HE","hep-ph"],"title_canon_sha256":"a62775f45cd195a7b883a62ca13b18886577f1124e0e9b4bb6b2bc96ce59f4e9","abstract_canon_sha256":"8d297d87481792c1b3189374964085d81c83b93087ecbd9bd71ce591da9be465"},"schema_version":"1.0"},"canonical_sha256":"cf01fc18e2bc8ed63fd7cbc1f89eb6daef1989cb46f39e539635ef063f3aeeea","source":{"kind":"arxiv","id":"1608.02425","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.02425","created_at":"2026-05-18T01:08:37Z"},{"alias_kind":"arxiv_version","alias_value":"1608.02425v1","created_at":"2026-05-18T01:08:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.02425","created_at":"2026-05-18T01:08:37Z"},{"alias_kind":"pith_short_12","alias_value":"Z4A7YGHCXSHN","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"Z4A7YGHCXSHNMP6X","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"Z4A7YGHC","created_at":"2026-05-18T12:30:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:Z4A7YGHCXSHNMP6XZPA7RHVW3L","target":"record","payload":{"canonical_record":{"source":{"id":"1608.02425","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-08-08T13:40:39Z","cross_cats_sorted":["astro-ph.HE","hep-ph"],"title_canon_sha256":"a62775f45cd195a7b883a62ca13b18886577f1124e0e9b4bb6b2bc96ce59f4e9","abstract_canon_sha256":"8d297d87481792c1b3189374964085d81c83b93087ecbd9bd71ce591da9be465"},"schema_version":"1.0"},"canonical_sha256":"cf01fc18e2bc8ed63fd7cbc1f89eb6daef1989cb46f39e539635ef063f3aeeea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:37.526232Z","signature_b64":"2M2oKz5FQHIeRAFqayM1K/wHu53THlaIUyttRh5DtcTiT7F+zh18tAWpVMaSCxWYs520oixeQXliL8B05IEmDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cf01fc18e2bc8ed63fd7cbc1f89eb6daef1989cb46f39e539635ef063f3aeeea","last_reissued_at":"2026-05-18T01:08:37.525630Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:37.525630Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.02425","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":"2026-05-18T01:08:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7tQcawkwFjcxd4zKfE7C7gZc7ELZeRZfK7+PFyafJu2Yvok8Jtzp/ZDLYxUWmLvjoAaTOyr2RMJ9CGMPNyFCAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T20:58:27.464428Z"},"content_sha256":"6d1862c0893ff45ae23a285977001a0e16b6a9d2663d69ff14df78974d009d67","schema_version":"1.0","event_id":"sha256:6d1862c0893ff45ae23a285977001a0e16b6a9d2663d69ff14df78974d009d67"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:Z4A7YGHCXSHNMP6XZPA7RHVW3L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Neutron star mass limit at $2M_\\odot$ supports the existence of a CEP","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","hep-ph"],"primary_cat":"nucl-th","authors_text":"D. Alvarez-Castillo, D. Blaschke, S. Benic, Sophia Han, S. Typel","submitted_at":"2016-08-08T13:40:39Z","abstract_excerpt":"We point out that the very existence of a \"horizontal branch\" in the mass-radius characteristics for neutron stars indicates a strong first-order phase transition and thus supports the existence of a critical endpoint (CEP) of first order phase transitions in the QCD phase diagram. This branch would sample a sequence of hybrid stars with quark matter core, leading to the endpoint of stable compact star configurations with the highest possible baryon densities. Since we know of the existence of compact stars with $2M_\\odot$, this hypothetical branch has to lie in the vicinity of this mass value"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.02425","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":"2026-05-18T01:08:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7+VpK9ojrQPwfObeMifjPHGVZ+OdZe0n4++Z1gAOK+a0sAoKvZY1Zmf1cZWw9dmwbY+Z56IzXusAg+ub87kZCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T20:58:27.464782Z"},"content_sha256":"348cc0ef3f9d6fbefcc1b2712904d3051de4e77c1508700796a626293e3b998f","schema_version":"1.0","event_id":"sha256:348cc0ef3f9d6fbefcc1b2712904d3051de4e77c1508700796a626293e3b998f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Z4A7YGHCXSHNMP6XZPA7RHVW3L/bundle.json","state_url":"https://pith.science/pith/Z4A7YGHCXSHNMP6XZPA7RHVW3L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Z4A7YGHCXSHNMP6XZPA7RHVW3L/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":"2026-06-03T20:58:27Z","links":{"resolver":"https://pith.science/pith/Z4A7YGHCXSHNMP6XZPA7RHVW3L","bundle":"https://pith.science/pith/Z4A7YGHCXSHNMP6XZPA7RHVW3L/bundle.json","state":"https://pith.science/pith/Z4A7YGHCXSHNMP6XZPA7RHVW3L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Z4A7YGHCXSHNMP6XZPA7RHVW3L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:Z4A7YGHCXSHNMP6XZPA7RHVW3L","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":"8d297d87481792c1b3189374964085d81c83b93087ecbd9bd71ce591da9be465","cross_cats_sorted":["astro-ph.HE","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-08-08T13:40:39Z","title_canon_sha256":"a62775f45cd195a7b883a62ca13b18886577f1124e0e9b4bb6b2bc96ce59f4e9"},"schema_version":"1.0","source":{"id":"1608.02425","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.02425","created_at":"2026-05-18T01:08:37Z"},{"alias_kind":"arxiv_version","alias_value":"1608.02425v1","created_at":"2026-05-18T01:08:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.02425","created_at":"2026-05-18T01:08:37Z"},{"alias_kind":"pith_short_12","alias_value":"Z4A7YGHCXSHN","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"Z4A7YGHCXSHNMP6X","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"Z4A7YGHC","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:348cc0ef3f9d6fbefcc1b2712904d3051de4e77c1508700796a626293e3b998f","target":"graph","created_at":"2026-05-18T01:08:37Z","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":"We point out that the very existence of a \"horizontal branch\" in the mass-radius characteristics for neutron stars indicates a strong first-order phase transition and thus supports the existence of a critical endpoint (CEP) of first order phase transitions in the QCD phase diagram. This branch would sample a sequence of hybrid stars with quark matter core, leading to the endpoint of stable compact star configurations with the highest possible baryon densities. Since we know of the existence of compact stars with $2M_\\odot$, this hypothetical branch has to lie in the vicinity of this mass value","authors_text":"D. Alvarez-Castillo, D. Blaschke, S. Benic, Sophia Han, S. Typel","cross_cats":["astro-ph.HE","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-08-08T13:40:39Z","title":"Neutron star mass limit at $2M_\\odot$ supports the existence of a CEP"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.02425","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":"sha256:6d1862c0893ff45ae23a285977001a0e16b6a9d2663d69ff14df78974d009d67","target":"record","created_at":"2026-05-18T01:08:37Z","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":"8d297d87481792c1b3189374964085d81c83b93087ecbd9bd71ce591da9be465","cross_cats_sorted":["astro-ph.HE","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-08-08T13:40:39Z","title_canon_sha256":"a62775f45cd195a7b883a62ca13b18886577f1124e0e9b4bb6b2bc96ce59f4e9"},"schema_version":"1.0","source":{"id":"1608.02425","kind":"arxiv","version":1}},"canonical_sha256":"cf01fc18e2bc8ed63fd7cbc1f89eb6daef1989cb46f39e539635ef063f3aeeea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cf01fc18e2bc8ed63fd7cbc1f89eb6daef1989cb46f39e539635ef063f3aeeea","first_computed_at":"2026-05-18T01:08:37.525630Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:37.525630Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2M2oKz5FQHIeRAFqayM1K/wHu53THlaIUyttRh5DtcTiT7F+zh18tAWpVMaSCxWYs520oixeQXliL8B05IEmDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:37.526232Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.02425","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6d1862c0893ff45ae23a285977001a0e16b6a9d2663d69ff14df78974d009d67","sha256:348cc0ef3f9d6fbefcc1b2712904d3051de4e77c1508700796a626293e3b998f"],"state_sha256":"97f30fe8164b0768e01f6078e42b8405c8038fab5e6c7197f0116c95c2ba91ab"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AphR1gw3oC1sCe2OzbJK0EwNZa1ntR44tENmTMVwGS9wJhteTlvM5CJ4fLRoOYDqHUiWpx3r0HvzkLsUp/bACA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T20:58:27.466838Z","bundle_sha256":"68c707b826c9bcb35efa8b941beb355853a27e53283400f170cabca8bf84af0b"}}