{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:4JV6DQBQ2W55JAXT2XTOI5VZ7M","short_pith_number":"pith:4JV6DQBQ","canonical_record":{"source":{"id":"nucl-th/9711029","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-th","submitted_at":"1997-11-14T16:43:42Z","cross_cats_sorted":[],"title_canon_sha256":"7687f173be6ef4d02235ee6e83864cba8e48046b349403f999dc552d985de9b6","abstract_canon_sha256":"f7e9c6e338c51181e10437d5f96ccbe6ac94dc9563f7a6225b85e1406c7c1491"},"schema_version":"1.0"},"canonical_sha256":"e26be1c030d5bbd482f3d5e6e476b9fb08ef7bd2fdd6595fe888386b44e57d5f","source":{"kind":"arxiv","id":"nucl-th/9711029","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-th/9711029","created_at":"2026-05-18T01:09:14Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-th/9711029v1","created_at":"2026-05-18T01:09:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-th/9711029","created_at":"2026-05-18T01:09:14Z"},{"alias_kind":"pith_short_12","alias_value":"4JV6DQBQ2W55","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"4JV6DQBQ2W55JAXT","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"4JV6DQBQ","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:4JV6DQBQ2W55JAXT2XTOI5VZ7M","target":"record","payload":{"canonical_record":{"source":{"id":"nucl-th/9711029","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-th","submitted_at":"1997-11-14T16:43:42Z","cross_cats_sorted":[],"title_canon_sha256":"7687f173be6ef4d02235ee6e83864cba8e48046b349403f999dc552d985de9b6","abstract_canon_sha256":"f7e9c6e338c51181e10437d5f96ccbe6ac94dc9563f7a6225b85e1406c7c1491"},"schema_version":"1.0"},"canonical_sha256":"e26be1c030d5bbd482f3d5e6e476b9fb08ef7bd2fdd6595fe888386b44e57d5f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:14.895503Z","signature_b64":"jd5LkTLnpAM7zUifvgS4Rj1b2+XUc3KZ5VmRyFzzyF9Zm1fE42tOZhkp2MVpZZ0Ns0DGyf3q2QgRB1vgjGZjDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e26be1c030d5bbd482f3d5e6e476b9fb08ef7bd2fdd6595fe888386b44e57d5f","last_reissued_at":"2026-05-18T01:09:14.894808Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:14.894808Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"nucl-th/9711029","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":"2026-05-18T01:09:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZDeJlt/pjyyb8ZHKn3qnLaCEjaJYQZz/G8InyaAk/OcMQGhy7ThwVB9yqJiscfEvEeyZ/EOekDyxNTEJwvfABA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T16:00:13.946578Z"},"content_sha256":"cf69e70a494f7f04a8732c8427303a653446c48158453c02411948c38a99170f","schema_version":"1.0","event_id":"sha256:cf69e70a494f7f04a8732c8427303a653446c48158453c02411948c38a99170f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:4JV6DQBQ2W55JAXT2XTOI5VZ7M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The role of tensor force in nuclear matter saturation","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"2), (2) IKP, 3) ((1) Department of Physics, (3) Institute for Theoretical Physics, Forschungszentrum-J\\\"ulich, John A. Tjon (1, Manoj K. Banerjee (1, University of Maryland, University of Utrecht)","submitted_at":"1997-11-14T16:43:42Z","abstract_excerpt":"Using a relativistic Dirac-Brueckner analysis the pion contribution to the ground state energy of nuclear matter is studied. Evidence is presented that the role of the tensor force in the saturation mechanism is substantially reduced compared to its dominant role in a usual non-relativistic treatment. The reduction of the pion contribution in nuclear matter is due to many-body effects present in a relativistic treatment. In particular, we show that the damping of OPEP is actually due to the decrease of $M^*/M$ with increasing density."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/9711029","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":"2026-05-18T01:09:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+MTmq9C5b2S/8lmEeYF4NMEaZPLaaRg9tjlLmXtYK37lITfzSpkX75UAPYAs8RxN9pTGG5mPo1uTAt0+7iXHCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T16:00:13.946928Z"},"content_sha256":"8cee6864f56b432ff8f0c1ff587897a3140168f771238100aa3b5be46a697f63","schema_version":"1.0","event_id":"sha256:8cee6864f56b432ff8f0c1ff587897a3140168f771238100aa3b5be46a697f63"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4JV6DQBQ2W55JAXT2XTOI5VZ7M/bundle.json","state_url":"https://pith.science/pith/4JV6DQBQ2W55JAXT2XTOI5VZ7M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4JV6DQBQ2W55JAXT2XTOI5VZ7M/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":"2026-06-09T16:00:13Z","links":{"resolver":"https://pith.science/pith/4JV6DQBQ2W55JAXT2XTOI5VZ7M","bundle":"https://pith.science/pith/4JV6DQBQ2W55JAXT2XTOI5VZ7M/bundle.json","state":"https://pith.science/pith/4JV6DQBQ2W55JAXT2XTOI5VZ7M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4JV6DQBQ2W55JAXT2XTOI5VZ7M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:4JV6DQBQ2W55JAXT2XTOI5VZ7M","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":"f7e9c6e338c51181e10437d5f96ccbe6ac94dc9563f7a6225b85e1406c7c1491","cross_cats_sorted":[],"license":"","primary_cat":"nucl-th","submitted_at":"1997-11-14T16:43:42Z","title_canon_sha256":"7687f173be6ef4d02235ee6e83864cba8e48046b349403f999dc552d985de9b6"},"schema_version":"1.0","source":{"id":"nucl-th/9711029","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-th/9711029","created_at":"2026-05-18T01:09:14Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-th/9711029v1","created_at":"2026-05-18T01:09:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-th/9711029","created_at":"2026-05-18T01:09:14Z"},{"alias_kind":"pith_short_12","alias_value":"4JV6DQBQ2W55","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"4JV6DQBQ2W55JAXT","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"4JV6DQBQ","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:8cee6864f56b432ff8f0c1ff587897a3140168f771238100aa3b5be46a697f63","target":"graph","created_at":"2026-05-18T01:09:14Z","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":"Using a relativistic Dirac-Brueckner analysis the pion contribution to the ground state energy of nuclear matter is studied. Evidence is presented that the role of the tensor force in the saturation mechanism is substantially reduced compared to its dominant role in a usual non-relativistic treatment. The reduction of the pion contribution in nuclear matter is due to many-body effects present in a relativistic treatment. In particular, we show that the damping of OPEP is actually due to the decrease of $M^*/M$ with increasing density.","authors_text":"2), (2) IKP, 3) ((1) Department of Physics, (3) Institute for Theoretical Physics, Forschungszentrum-J\\\"ulich, John A. Tjon (1, Manoj K. Banerjee (1, University of Maryland, University of Utrecht)","cross_cats":[],"headline":"","license":"","primary_cat":"nucl-th","submitted_at":"1997-11-14T16:43:42Z","title":"The role of tensor force in nuclear matter saturation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/9711029","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:cf69e70a494f7f04a8732c8427303a653446c48158453c02411948c38a99170f","target":"record","created_at":"2026-05-18T01:09:14Z","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":"f7e9c6e338c51181e10437d5f96ccbe6ac94dc9563f7a6225b85e1406c7c1491","cross_cats_sorted":[],"license":"","primary_cat":"nucl-th","submitted_at":"1997-11-14T16:43:42Z","title_canon_sha256":"7687f173be6ef4d02235ee6e83864cba8e48046b349403f999dc552d985de9b6"},"schema_version":"1.0","source":{"id":"nucl-th/9711029","kind":"arxiv","version":1}},"canonical_sha256":"e26be1c030d5bbd482f3d5e6e476b9fb08ef7bd2fdd6595fe888386b44e57d5f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e26be1c030d5bbd482f3d5e6e476b9fb08ef7bd2fdd6595fe888386b44e57d5f","first_computed_at":"2026-05-18T01:09:14.894808Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:14.894808Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jd5LkTLnpAM7zUifvgS4Rj1b2+XUc3KZ5VmRyFzzyF9Zm1fE42tOZhkp2MVpZZ0Ns0DGyf3q2QgRB1vgjGZjDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:14.895503Z","signed_message":"canonical_sha256_bytes"},"source_id":"nucl-th/9711029","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cf69e70a494f7f04a8732c8427303a653446c48158453c02411948c38a99170f","sha256:8cee6864f56b432ff8f0c1ff587897a3140168f771238100aa3b5be46a697f63"],"state_sha256":"042d8aa9ab85b067da6a6c231dda0e39879b52bf20f3db6cfef529465e918230"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tWAskMqPtJCk0Pez1ABxJUlWbK3Elv5nOMGX19SeaxDpbzw09E3m+wWF5sst89rR7euNoDJRq9nEqL9Yc/0xDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T16:00:13.948949Z","bundle_sha256":"23f0c9154fa2ebe4cdfc472a6f761ed65602c7ee8476323035f68470ff9e0886"}}