{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:EFR4ZUOOV3PENG7NWT6H2ERNLP","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":"6a0de798ee0775416d02ce2194293996ac16a90ac1aecc94fd6d6c889ae5646e","cross_cats_sorted":["hep-ph","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-07-10T16:06:47Z","title_canon_sha256":"2dab52d6d367b749d642843d7ab72f928bda3fd2111a682a354d96492cd69160"},"schema_version":"1.0","source":{"id":"1407.2843","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.2843","created_at":"2026-05-18T02:47:53Z"},{"alias_kind":"arxiv_version","alias_value":"1407.2843v1","created_at":"2026-05-18T02:47:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.2843","created_at":"2026-05-18T02:47:53Z"},{"alias_kind":"pith_short_12","alias_value":"EFR4ZUOOV3PE","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"EFR4ZUOOV3PENG7N","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"EFR4ZUOO","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:cf875ddf4e74e1ee0f051846c85eab8a616b3066a134f7ffdeb620e5a6d8fa80","target":"graph","created_at":"2026-05-18T02:47:53Z","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 discuss the formation of $\\Delta$ isobars in neutron star matter. We show that their threshold density strictly correlates with the density derivative of the symmetry energy of nuclear matter, the $L$ parameter. By restricting $L$ to the range of values indicated by recent experimental and theoretical analysis, i.e. $40$ MeV $\\lesssim L \\lesssim 62$ MeV, we find that $\\Delta$ isobars appear at a density of the order of 2$\\div$3 times nuclear matter saturation density, i.e. the same range for the appearance of hyperons. The range of values of the couplings of the $\\Delta$s with the mesons is","authors_text":"Alessandro Drago, Andrea Lavagno, Daniele Pigato, Giuseppe Pagliara","cross_cats":["hep-ph","nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-07-10T16:06:47Z","title":"Is there a \"$\\Delta$-isobar puzzle\" in the physics of neutron stars?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.2843","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":"sha256:5d131e73489e88a67a4c096d12585420d281926cdf3ddf8f0e9308cdb946eb94","target":"record","created_at":"2026-05-18T02:47:53Z","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":"6a0de798ee0775416d02ce2194293996ac16a90ac1aecc94fd6d6c889ae5646e","cross_cats_sorted":["hep-ph","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-07-10T16:06:47Z","title_canon_sha256":"2dab52d6d367b749d642843d7ab72f928bda3fd2111a682a354d96492cd69160"},"schema_version":"1.0","source":{"id":"1407.2843","kind":"arxiv","version":1}},"canonical_sha256":"2163ccd1ceaede469bedb4fc7d122d5bd2d75d43400c9353f2c0ea6069298b16","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2163ccd1ceaede469bedb4fc7d122d5bd2d75d43400c9353f2c0ea6069298b16","first_computed_at":"2026-05-18T02:47:53.541550Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:47:53.541550Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DS+4E0b84jlSjfrDWFjXP/6e6ivMN10ly2unnikxiMHpYE1y9UFtdMoOxgdRCHQ5ZAc1bA62udvpQX8JaIG0DA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:47:53.542028Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.2843","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5d131e73489e88a67a4c096d12585420d281926cdf3ddf8f0e9308cdb946eb94","sha256:cf875ddf4e74e1ee0f051846c85eab8a616b3066a134f7ffdeb620e5a6d8fa80"],"state_sha256":"c368dacae353e51f3bb5292218f726a30befbed411961b28553da46b780e4ffb"}