{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:EOD5YZOFKRL5PS76AJWBFCCUFJ","short_pith_number":"pith:EOD5YZOF","canonical_record":{"source":{"id":"1701.08961","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2017-01-31T09:38:48Z","cross_cats_sorted":[],"title_canon_sha256":"2023ea1ffc00663489eaf0aaa842c093b8d20294ec0a5657bffbc44de9518d1c","abstract_canon_sha256":"fc6fba8c46292098701a5c094182f8ec9bc531eb7607d09007c082f49d985441"},"schema_version":"1.0"},"canonical_sha256":"2387dc65c55457d7cbfe026c1288542a69ebdfb25360154d4951633a4f20e92d","source":{"kind":"arxiv","id":"1701.08961","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.08961","created_at":"2026-05-18T00:51:38Z"},{"alias_kind":"arxiv_version","alias_value":"1701.08961v1","created_at":"2026-05-18T00:51:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.08961","created_at":"2026-05-18T00:51:38Z"},{"alias_kind":"pith_short_12","alias_value":"EOD5YZOFKRL5","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"EOD5YZOFKRL5PS76","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"EOD5YZOF","created_at":"2026-05-18T12:31:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:EOD5YZOFKRL5PS76AJWBFCCUFJ","target":"record","payload":{"canonical_record":{"source":{"id":"1701.08961","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2017-01-31T09:38:48Z","cross_cats_sorted":[],"title_canon_sha256":"2023ea1ffc00663489eaf0aaa842c093b8d20294ec0a5657bffbc44de9518d1c","abstract_canon_sha256":"fc6fba8c46292098701a5c094182f8ec9bc531eb7607d09007c082f49d985441"},"schema_version":"1.0"},"canonical_sha256":"2387dc65c55457d7cbfe026c1288542a69ebdfb25360154d4951633a4f20e92d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:51:38.794600Z","signature_b64":"REeephg1atUaB4GtvOGSvBXXa4Uhu5yshIX6JNUxiVekMYL3D+QMo8EmeA+YsswOekTapoCHWBF6wH0zJG2kAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2387dc65c55457d7cbfe026c1288542a69ebdfb25360154d4951633a4f20e92d","last_reissued_at":"2026-05-18T00:51:38.794210Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:51:38.794210Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1701.08961","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":"2026-05-18T00:51:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o07bqUUQhiuU1ab7Py5tz/0M/vjMbyjmWrvNeHjucpmzxkFI5WW9KC0FfGVr7pl6Zd2H4Xb43IEyAnQaz3XwDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:12:34.718928Z"},"content_sha256":"326dc14db5fedad99ef63f551deea9a09196dcecf7aee5fb447d530198cc4ca0","schema_version":"1.0","event_id":"sha256:326dc14db5fedad99ef63f551deea9a09196dcecf7aee5fb447d530198cc4ca0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:EOD5YZOFKRL5PS76AJWBFCCUFJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Isospin-0 $\\pi\\pi$ scattering from twisted mass lattice QCD","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"B. Knippschild, B. Kostrzewa, C. Helmes, C. Jost, C. Urbach, H. Liu, J. Finkenrath, K. Ottnad, L. Liu, M. Petschlies, M. Werner, P. Dimopoulos, R. Frezzotti, S. Bacchio","submitted_at":"2017-01-31T09:38:48Z","abstract_excerpt":"We present results for the isospin-0 $\\pi\\pi$ s-wave scattering length calculated in twisted mass lattice QCD. We use three $N_f = 2$ ensembles with unitary pion mass at its physical value, 240~MeV and 330~MeV respectively. We also use a large set of $N_f = 2 + 1 +1$ ensembles with unitary pion masses varying in the range of 230~MeV - 510~MeV at three different values of the lattice spacing. A mixed action approach with the Osterwalder-Seiler action in the valence sector is adopted to circumvent the complications arising from isospin symmetry breaking of the twisted mass quark action. Due to t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.08961","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":"2026-05-18T00:51:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zGrhR6F3H9TBDPkj1XwouhgoImLlSOSg2nvEOiLb0zTUZ1rl4nHsKeN5l6h8x3ShgU9CToEPTjqn4WNjxqjlBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:12:34.719270Z"},"content_sha256":"35998a83984bbe356fe70d879f702661380ae81375db8295822c37ce30660788","schema_version":"1.0","event_id":"sha256:35998a83984bbe356fe70d879f702661380ae81375db8295822c37ce30660788"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EOD5YZOFKRL5PS76AJWBFCCUFJ/bundle.json","state_url":"https://pith.science/pith/EOD5YZOFKRL5PS76AJWBFCCUFJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EOD5YZOFKRL5PS76AJWBFCCUFJ/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":"2026-06-02T23:12:34Z","links":{"resolver":"https://pith.science/pith/EOD5YZOFKRL5PS76AJWBFCCUFJ","bundle":"https://pith.science/pith/EOD5YZOFKRL5PS76AJWBFCCUFJ/bundle.json","state":"https://pith.science/pith/EOD5YZOFKRL5PS76AJWBFCCUFJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EOD5YZOFKRL5PS76AJWBFCCUFJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:EOD5YZOFKRL5PS76AJWBFCCUFJ","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":"fc6fba8c46292098701a5c094182f8ec9bc531eb7607d09007c082f49d985441","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2017-01-31T09:38:48Z","title_canon_sha256":"2023ea1ffc00663489eaf0aaa842c093b8d20294ec0a5657bffbc44de9518d1c"},"schema_version":"1.0","source":{"id":"1701.08961","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.08961","created_at":"2026-05-18T00:51:38Z"},{"alias_kind":"arxiv_version","alias_value":"1701.08961v1","created_at":"2026-05-18T00:51:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.08961","created_at":"2026-05-18T00:51:38Z"},{"alias_kind":"pith_short_12","alias_value":"EOD5YZOFKRL5","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"EOD5YZOFKRL5PS76","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"EOD5YZOF","created_at":"2026-05-18T12:31:12Z"}],"graph_snapshots":[{"event_id":"sha256:35998a83984bbe356fe70d879f702661380ae81375db8295822c37ce30660788","target":"graph","created_at":"2026-05-18T00:51:38Z","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 results for the isospin-0 $\\pi\\pi$ s-wave scattering length calculated in twisted mass lattice QCD. We use three $N_f = 2$ ensembles with unitary pion mass at its physical value, 240~MeV and 330~MeV respectively. We also use a large set of $N_f = 2 + 1 +1$ ensembles with unitary pion masses varying in the range of 230~MeV - 510~MeV at three different values of the lattice spacing. A mixed action approach with the Osterwalder-Seiler action in the valence sector is adopted to circumvent the complications arising from isospin symmetry breaking of the twisted mass quark action. Due to t","authors_text":"B. Knippschild, B. Kostrzewa, C. Helmes, C. Jost, C. Urbach, H. Liu, J. Finkenrath, K. Ottnad, L. Liu, M. Petschlies, M. Werner, P. Dimopoulos, R. Frezzotti, S. Bacchio","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2017-01-31T09:38:48Z","title":"Isospin-0 $\\pi\\pi$ scattering from twisted mass lattice QCD"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.08961","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":"sha256:326dc14db5fedad99ef63f551deea9a09196dcecf7aee5fb447d530198cc4ca0","target":"record","created_at":"2026-05-18T00:51:38Z","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":"fc6fba8c46292098701a5c094182f8ec9bc531eb7607d09007c082f49d985441","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2017-01-31T09:38:48Z","title_canon_sha256":"2023ea1ffc00663489eaf0aaa842c093b8d20294ec0a5657bffbc44de9518d1c"},"schema_version":"1.0","source":{"id":"1701.08961","kind":"arxiv","version":1}},"canonical_sha256":"2387dc65c55457d7cbfe026c1288542a69ebdfb25360154d4951633a4f20e92d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2387dc65c55457d7cbfe026c1288542a69ebdfb25360154d4951633a4f20e92d","first_computed_at":"2026-05-18T00:51:38.794210Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:51:38.794210Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"REeephg1atUaB4GtvOGSvBXXa4Uhu5yshIX6JNUxiVekMYL3D+QMo8EmeA+YsswOekTapoCHWBF6wH0zJG2kAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:51:38.794600Z","signed_message":"canonical_sha256_bytes"},"source_id":"1701.08961","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:326dc14db5fedad99ef63f551deea9a09196dcecf7aee5fb447d530198cc4ca0","sha256:35998a83984bbe356fe70d879f702661380ae81375db8295822c37ce30660788"],"state_sha256":"5373d8c591cf039040716ff28cf888815be0dd49f1ba55c0585e50770815713d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U6EGsMwrAPFDgmWXBGJ06KdZEvMuZJICWnqP0kdJ7kQ8+pzBOAvqKrnNcdc3jkRuWmk4pJL3Ec+xSEiVU370CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T23:12:34.721233Z","bundle_sha256":"c04bd2bb90e995587ef53702d0f13ef317bf45b846489e7571ee6dd0bf4c609a"}}