{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:LBODBYD63WMK3FF4YLPR76WU5S","short_pith_number":"pith:LBODBYD6","canonical_record":{"source":{"id":"2109.13303","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2021-09-27T18:53:27Z","cross_cats_sorted":[],"title_canon_sha256":"5ca6658058477999f5e7f760ae5f642d0577d003a08cebf196f15b12b4af80e2","abstract_canon_sha256":"5a800d065fa2c00803be263ed91e6a45acca4ada561d58d0f7363443e01d8b0c"},"schema_version":"1.0"},"canonical_sha256":"585c30e07edd98ad94bcc2df1ffad4ecb33367b8e43637c3371012d1917a594d","source":{"kind":"arxiv","id":"2109.13303","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.13303","created_at":"2026-07-05T06:57:18Z"},{"alias_kind":"arxiv_version","alias_value":"2109.13303v2","created_at":"2026-07-05T06:57:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.13303","created_at":"2026-07-05T06:57:18Z"},{"alias_kind":"pith_short_12","alias_value":"LBODBYD63WMK","created_at":"2026-07-05T06:57:18Z"},{"alias_kind":"pith_short_16","alias_value":"LBODBYD63WMK3FF4","created_at":"2026-07-05T06:57:18Z"},{"alias_kind":"pith_short_8","alias_value":"LBODBYD6","created_at":"2026-07-05T06:57:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:LBODBYD63WMK3FF4YLPR76WU5S","target":"record","payload":{"canonical_record":{"source":{"id":"2109.13303","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2021-09-27T18:53:27Z","cross_cats_sorted":[],"title_canon_sha256":"5ca6658058477999f5e7f760ae5f642d0577d003a08cebf196f15b12b4af80e2","abstract_canon_sha256":"5a800d065fa2c00803be263ed91e6a45acca4ada561d58d0f7363443e01d8b0c"},"schema_version":"1.0"},"canonical_sha256":"585c30e07edd98ad94bcc2df1ffad4ecb33367b8e43637c3371012d1917a594d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:57:18.270668Z","signature_b64":"Ra9Xx/sAVOU74Ee7uIg2CDdtmfmbXfGxICzNnuq0oZxyaE4o0t81la3/F4wN6aU39vcP0Hu7qlTkx/HoEW+BAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"585c30e07edd98ad94bcc2df1ffad4ecb33367b8e43637c3371012d1917a594d","last_reissued_at":"2026-07-05T06:57:18.270172Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:57:18.270172Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2109.13303","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":"2026-07-05T06:57:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kAbs6xSTVfapaAGNAOUOC40Oz941pyVNZcFDR/1BftpZws7OW79H8g28wSJ7Uj5ZACPG6XmoZhtkc5iVk37LCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T15:49:41.273663Z"},"content_sha256":"52ff541fc7afb76729ba4235371112982bec50387e3c0bbdca43552196ef36ae","schema_version":"1.0","event_id":"sha256:52ff541fc7afb76729ba4235371112982bec50387e3c0bbdca43552196ef36ae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:LBODBYD63WMK3FF4YLPR76WU5S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The importance of few-nucleon forces in chiral effective field theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"A. Ekstr\\\"om, C. Forss\\'en, C.-J. Yang, G. Hagen, G. Rupak, U. van Kolck","submitted_at":"2021-09-27T18:53:27Z","abstract_excerpt":"We study the importance of few-nucleon forces in chiral effective field theory for describing many-nucleon systems. A combinatorial argument suggests that three-nucleon forces -- which are conventionally regarded as next-to-next-to-leading order -- should accompany the two-nucleon force already at leading order (LO) starting with mass number $A\\approx 10-20$. We find that this promotion enables the first realistic description of the $^{16}$O ground state based on a renormalization-group-invariant LO interaction. We also performed coupled-cluster calculations of the equation of state for symmet"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.13303","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2109.13303/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T06:57:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tsABRqvPuSodKxDi+eXQpZqrwVvEjgUzY4qr6f1+MG1SH4NgvAiha1pSjuTb2gqYr3/cXrRYm9da7WrYKzeABg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T15:49:41.274564Z"},"content_sha256":"e46860be3863dfeaa65d5e42346de92538d4ccdd9c5d99b78e08ec19f45b7a2a","schema_version":"1.0","event_id":"sha256:e46860be3863dfeaa65d5e42346de92538d4ccdd9c5d99b78e08ec19f45b7a2a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LBODBYD63WMK3FF4YLPR76WU5S/bundle.json","state_url":"https://pith.science/pith/LBODBYD63WMK3FF4YLPR76WU5S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LBODBYD63WMK3FF4YLPR76WU5S/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":"2026-08-10T15:49:41Z","links":{"resolver":"https://pith.science/pith/LBODBYD63WMK3FF4YLPR76WU5S","bundle":"https://pith.science/pith/LBODBYD63WMK3FF4YLPR76WU5S/bundle.json","state":"https://pith.science/pith/LBODBYD63WMK3FF4YLPR76WU5S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LBODBYD63WMK3FF4YLPR76WU5S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:LBODBYD63WMK3FF4YLPR76WU5S","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":"5a800d065fa2c00803be263ed91e6a45acca4ada561d58d0f7363443e01d8b0c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2021-09-27T18:53:27Z","title_canon_sha256":"5ca6658058477999f5e7f760ae5f642d0577d003a08cebf196f15b12b4af80e2"},"schema_version":"1.0","source":{"id":"2109.13303","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.13303","created_at":"2026-07-05T06:57:18Z"},{"alias_kind":"arxiv_version","alias_value":"2109.13303v2","created_at":"2026-07-05T06:57:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.13303","created_at":"2026-07-05T06:57:18Z"},{"alias_kind":"pith_short_12","alias_value":"LBODBYD63WMK","created_at":"2026-07-05T06:57:18Z"},{"alias_kind":"pith_short_16","alias_value":"LBODBYD63WMK3FF4","created_at":"2026-07-05T06:57:18Z"},{"alias_kind":"pith_short_8","alias_value":"LBODBYD6","created_at":"2026-07-05T06:57:18Z"}],"graph_snapshots":[{"event_id":"sha256:e46860be3863dfeaa65d5e42346de92538d4ccdd9c5d99b78e08ec19f45b7a2a","target":"graph","created_at":"2026-07-05T06:57:18Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2109.13303/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study the importance of few-nucleon forces in chiral effective field theory for describing many-nucleon systems. A combinatorial argument suggests that three-nucleon forces -- which are conventionally regarded as next-to-next-to-leading order -- should accompany the two-nucleon force already at leading order (LO) starting with mass number $A\\approx 10-20$. We find that this promotion enables the first realistic description of the $^{16}$O ground state based on a renormalization-group-invariant LO interaction. We also performed coupled-cluster calculations of the equation of state for symmet","authors_text":"A. Ekstr\\\"om, C. Forss\\'en, C.-J. Yang, G. Hagen, G. Rupak, U. van Kolck","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2021-09-27T18:53:27Z","title":"The importance of few-nucleon forces in chiral effective field theory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.13303","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":"sha256:52ff541fc7afb76729ba4235371112982bec50387e3c0bbdca43552196ef36ae","target":"record","created_at":"2026-07-05T06:57:18Z","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":"5a800d065fa2c00803be263ed91e6a45acca4ada561d58d0f7363443e01d8b0c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2021-09-27T18:53:27Z","title_canon_sha256":"5ca6658058477999f5e7f760ae5f642d0577d003a08cebf196f15b12b4af80e2"},"schema_version":"1.0","source":{"id":"2109.13303","kind":"arxiv","version":2}},"canonical_sha256":"585c30e07edd98ad94bcc2df1ffad4ecb33367b8e43637c3371012d1917a594d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"585c30e07edd98ad94bcc2df1ffad4ecb33367b8e43637c3371012d1917a594d","first_computed_at":"2026-07-05T06:57:18.270172Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:57:18.270172Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ra9Xx/sAVOU74Ee7uIg2CDdtmfmbXfGxICzNnuq0oZxyaE4o0t81la3/F4wN6aU39vcP0Hu7qlTkx/HoEW+BAA==","signature_status":"signed_v1","signed_at":"2026-07-05T06:57:18.270668Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.13303","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:52ff541fc7afb76729ba4235371112982bec50387e3c0bbdca43552196ef36ae","sha256:e46860be3863dfeaa65d5e42346de92538d4ccdd9c5d99b78e08ec19f45b7a2a"],"state_sha256":"131751f92286b7d30abdf5f6683e81a72e328e0252f1ea448626ea59a93fc821"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k89cJG1OkIEKogF4zAo5StwRoVylKNrD+HQ07+4AfR9F5E/TF98T5qP0L338ujOabs7U8E0rpt5oEIPigp+1Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T15:49:41.280339Z","bundle_sha256":"b82713afdff7a00fcbebc1f78ec8e8b2f7d6f7bc6ffd5feef234c99c8ff5677b"}}