{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:7QK45AIQLXERYZ2X73PWC23PEG","short_pith_number":"pith:7QK45AIQ","schema_version":"1.0","canonical_sha256":"fc15ce81105dc91c6757fedf616b6f21b72fdcbea92a8bc36f42a5f34a7a2bd6","source":{"kind":"arxiv","id":"1206.7034","version":2},"attestation_state":"computed","paper":{"title":"Nucleon mass and sigma term from lattice QCD with two light fermion flavors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"A. Nobile, A. Sch\\\"afer, A. Sternbeck, B. Gl\\\"a{\\ss}le, D. Pleiter, G. S. Bali, G. Schierholz, J. Najjar, J. Zanotti, L. Greil, M. Deka, M. G\\\"ockeler, P. C. Bruns, P. E. L. Rakow, R. Horsley, R. Schiel, S. Collins, T. R. Hemmert, Y. Nakamura","submitted_at":"2012-06-29T14:02:44Z","abstract_excerpt":"We analyze Nf=2 nucleon mass data with respect to their dependence on the pion mass down to mpi = 157 MeV and compare it with predictions from covariant baryon chiral perturbation theory (BChPT). A novel feature of our approach is that we fit the nucleon mass data simultaneously with the directly obtained pion-nucleon sigma-term. Our lattice data below mpi = 435 MeV is well described by O(p^4) BChPT and we find sigma=37(8)(6) MeV for the sigma-term at the physical point. Using the nucleon mass to set the scale we obtain a Sommer parameter of r_0=0.501(10)(11) fm."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1206.7034","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2012-06-29T14:02:44Z","cross_cats_sorted":[],"title_canon_sha256":"aa30e8a04ac53d019c74d9c3b2d5907ff7acc3f472ca4ddd09f4ac1d8ac47fc4","abstract_canon_sha256":"6cc78c7126940d708c792ec86bfe09c43e7ff39062fd365eef807c7788122079"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:45:33.121427Z","signature_b64":"Nf6+kBnBUmbPWYUyPvn/29IWwxDQlD0SOTkHW3cEW+5I82v3A+kVtK67lOoW+FUpaAiTxiAy4/ZDZz4Nf/10Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fc15ce81105dc91c6757fedf616b6f21b72fdcbea92a8bc36f42a5f34a7a2bd6","last_reissued_at":"2026-05-18T03:45:33.120992Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:45:33.120992Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Nucleon mass and sigma term from lattice QCD with two light fermion flavors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"A. Nobile, A. Sch\\\"afer, A. Sternbeck, B. Gl\\\"a{\\ss}le, D. Pleiter, G. S. Bali, G. Schierholz, J. Najjar, J. Zanotti, L. Greil, M. Deka, M. G\\\"ockeler, P. C. Bruns, P. E. L. Rakow, R. Horsley, R. Schiel, S. Collins, T. R. Hemmert, Y. Nakamura","submitted_at":"2012-06-29T14:02:44Z","abstract_excerpt":"We analyze Nf=2 nucleon mass data with respect to their dependence on the pion mass down to mpi = 157 MeV and compare it with predictions from covariant baryon chiral perturbation theory (BChPT). A novel feature of our approach is that we fit the nucleon mass data simultaneously with the directly obtained pion-nucleon sigma-term. Our lattice data below mpi = 435 MeV is well described by O(p^4) BChPT and we find sigma=37(8)(6) MeV for the sigma-term at the physical point. Using the nucleon mass to set the scale we obtain a Sommer parameter of r_0=0.501(10)(11) fm."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.7034","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1206.7034","created_at":"2026-05-18T03:45:33.121053+00:00"},{"alias_kind":"arxiv_version","alias_value":"1206.7034v2","created_at":"2026-05-18T03:45:33.121053+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.7034","created_at":"2026-05-18T03:45:33.121053+00:00"},{"alias_kind":"pith_short_12","alias_value":"7QK45AIQLXER","created_at":"2026-05-18T12:26:58.693483+00:00"},{"alias_kind":"pith_short_16","alias_value":"7QK45AIQLXERYZ2X","created_at":"2026-05-18T12:26:58.693483+00:00"},{"alias_kind":"pith_short_8","alias_value":"7QK45AIQ","created_at":"2026-05-18T12:26:58.693483+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/7QK45AIQLXERYZ2X73PWC23PEG","json":"https://pith.science/pith/7QK45AIQLXERYZ2X73PWC23PEG.json","graph_json":"https://pith.science/api/pith-number/7QK45AIQLXERYZ2X73PWC23PEG/graph.json","events_json":"https://pith.science/api/pith-number/7QK45AIQLXERYZ2X73PWC23PEG/events.json","paper":"https://pith.science/paper/7QK45AIQ"},"agent_actions":{"view_html":"https://pith.science/pith/7QK45AIQLXERYZ2X73PWC23PEG","download_json":"https://pith.science/pith/7QK45AIQLXERYZ2X73PWC23PEG.json","view_paper":"https://pith.science/paper/7QK45AIQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1206.7034&json=true","fetch_graph":"https://pith.science/api/pith-number/7QK45AIQLXERYZ2X73PWC23PEG/graph.json","fetch_events":"https://pith.science/api/pith-number/7QK45AIQLXERYZ2X73PWC23PEG/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/7QK45AIQLXERYZ2X73PWC23PEG/action/timestamp_anchor","attest_storage":"https://pith.science/pith/7QK45AIQLXERYZ2X73PWC23PEG/action/storage_attestation","attest_author":"https://pith.science/pith/7QK45AIQLXERYZ2X73PWC23PEG/action/author_attestation","sign_citation":"https://pith.science/pith/7QK45AIQLXERYZ2X73PWC23PEG/action/citation_signature","submit_replication":"https://pith.science/pith/7QK45AIQLXERYZ2X73PWC23PEG/action/replication_record"}},"created_at":"2026-05-18T03:45:33.121053+00:00","updated_at":"2026-05-18T03:45:33.121053+00:00"}