{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:LLEEGBALFZ55UL73MRKBVDQXID","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":"6f77110a23750a1328b7a5a3065c80b508c9f2fc31a3e110ffedfe1231e05586","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2018-06-06T18:05:27Z","title_canon_sha256":"2e808035ee47c4e681f9a3a8d09649a3d3c1746a346a9946b68e4629ad67c0dc"},"schema_version":"1.0","source":{"id":"1806.02363","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.02363","created_at":"2026-05-18T00:10:59Z"},{"alias_kind":"arxiv_version","alias_value":"1806.02363v2","created_at":"2026-05-18T00:10:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.02363","created_at":"2026-05-18T00:10:59Z"},{"alias_kind":"pith_short_12","alias_value":"LLEEGBALFZ55","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LLEEGBALFZ55UL73","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LLEEGBAL","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:a558eee6e28c86e55ebf9374de923a939179365044e7edc52e81c1ef86887e59","target":"graph","created_at":"2026-05-18T00:10:59Z","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 present a lattice QCD study of the puzzling positive-parity nucleon channel, where the Roper resonance $N^*(1440)$ resides in experiment. The study is based on an ensemble of gauge configurations with $N_f=2+1$ Wilson-clover fermions with a pion mass of $156$ MeV and lattice size $L=2.9$ fm. We use several $qqq$ interpolating fields combined with $N\\pi$ and $N\\sigma$ two-hadron operators in calculating the energy spectrum in the rest frame. Combining experimental $N\\pi$ phase shifts with elastic approximation and the L\\\"uscher formalism suggests in the spectrum an additional energy level ne","authors_text":"Christian B. Lang, Luka Leskovec, M. Padmanath, Sasa Prelovsek","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2018-06-06T18:05:27Z","title":"A lattice QCD study of pion-nucleon scattering in the Roper channel"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.02363","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:daabd2a598dd175a96d118d053dbe8b7a459a8a1ba13c9a3022fb615124fe004","target":"record","created_at":"2026-05-18T00:10:59Z","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":"6f77110a23750a1328b7a5a3065c80b508c9f2fc31a3e110ffedfe1231e05586","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2018-06-06T18:05:27Z","title_canon_sha256":"2e808035ee47c4e681f9a3a8d09649a3d3c1746a346a9946b68e4629ad67c0dc"},"schema_version":"1.0","source":{"id":"1806.02363","kind":"arxiv","version":2}},"canonical_sha256":"5ac843040b2e7bda2ffb64541a8e1740f7f823447dcfa70164254a9d550d4366","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5ac843040b2e7bda2ffb64541a8e1740f7f823447dcfa70164254a9d550d4366","first_computed_at":"2026-05-18T00:10:59.466529Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:10:59.466529Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/lMy17/JAJA25P2/YmO00df41nxZTex1Rb8vftehI+xx6Cd1WXccUzjiDslkM3PPlnZfijz5WP6O+6jbe4uCDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:10:59.467649Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.02363","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:daabd2a598dd175a96d118d053dbe8b7a459a8a1ba13c9a3022fb615124fe004","sha256:a558eee6e28c86e55ebf9374de923a939179365044e7edc52e81c1ef86887e59"],"state_sha256":"369533c551bde3729044c119aed9610ff14226fff7c9e4006715b8f18164241f"}