{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:D4T5YVIXQCLNY6HR7TXSUBJRUF","short_pith_number":"pith:D4T5YVIX","canonical_record":{"source":{"id":"2002.05419","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2020-02-13T10:12:40Z","cross_cats_sorted":[],"title_canon_sha256":"d77b2f50248c0c705dbceaf8b3382901619b9b82087df4878402469e3808db06","abstract_canon_sha256":"876d09a2eb7bb0768353810665e8c5e25277b35b5e7966f3d6283569254b012d"},"schema_version":"1.0"},"canonical_sha256":"1f27dc55178096dc78f1fcef2a0531a15215fbcabbb0ab36cfef3ca33866c69f","source":{"kind":"arxiv","id":"2002.05419","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.05419","created_at":"2026-07-05T02:27:19Z"},{"alias_kind":"arxiv_version","alias_value":"2002.05419v1","created_at":"2026-07-05T02:27:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.05419","created_at":"2026-07-05T02:27:19Z"},{"alias_kind":"pith_short_12","alias_value":"D4T5YVIXQCLN","created_at":"2026-07-05T02:27:19Z"},{"alias_kind":"pith_short_16","alias_value":"D4T5YVIXQCLNY6HR","created_at":"2026-07-05T02:27:19Z"},{"alias_kind":"pith_short_8","alias_value":"D4T5YVIX","created_at":"2026-07-05T02:27:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:D4T5YVIXQCLNY6HR7TXSUBJRUF","target":"record","payload":{"canonical_record":{"source":{"id":"2002.05419","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2020-02-13T10:12:40Z","cross_cats_sorted":[],"title_canon_sha256":"d77b2f50248c0c705dbceaf8b3382901619b9b82087df4878402469e3808db06","abstract_canon_sha256":"876d09a2eb7bb0768353810665e8c5e25277b35b5e7966f3d6283569254b012d"},"schema_version":"1.0"},"canonical_sha256":"1f27dc55178096dc78f1fcef2a0531a15215fbcabbb0ab36cfef3ca33866c69f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:27:19.134434Z","signature_b64":"+X3E3bj5Q6+DEi44WyjB2ZlvS29GzmYTHyx0LblZ7Z5QRziRJVMuc07ugP6SYFTd61cNSs4NKxgFQCzp4fNyCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1f27dc55178096dc78f1fcef2a0531a15215fbcabbb0ab36cfef3ca33866c69f","last_reissued_at":"2026-07-05T02:27:19.133924Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:27:19.133924Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2002.05419","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":"2026-07-05T02:27:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1YxlhbuhKiLV5IAFeTjoGRET6Qg/KbHoGSsb/IkpQtvmkxtfD9DL+x8j1llBSAtS1JZSjNjYFuNChBhntmI1BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T03:10:33.656700Z"},"content_sha256":"90b07bf5ecdffd7df235f34233bbb496bf5a8acb96334994d6309f719f69a813","schema_version":"1.0","event_id":"sha256:90b07bf5ecdffd7df235f34233bbb496bf5a8acb96334994d6309f719f69a813"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:D4T5YVIXQCLNY6HR7TXSUBJRUF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the N-pion extension of the Lovelace-Shapiro model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Dario Consoli, Massimo Bianchi, Paolo Di Vecchia","submitted_at":"2020-02-13T10:12:40Z","abstract_excerpt":"We reconsider a modification of the N-point amplitude of the Neveu-Schwarz (NS) model in which the tachyon becomes a pion by shifting its mass to zero and keeping the super-projective invariance of the integrand of the amplitude. For the scattering of four particles it reduces to the amplitude written by Lovelace and Shapiro that has Adler zeroes. We confirm that also the N-pion amplitude has Adler zeroes and show that it reduces to that of the non-linear $\\sigma$-model for $\\alpha' \\rightarrow 0$ keeping $F_\\pi$ fixed. The four- and six-point flavour-ordered amplitudes satisfy tree-level unit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.05419","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2002.05419/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":"2026-07-05T02:27:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wgsypmf11YS/Nu0sG9TG3nPBoDWhEFqrta5UVLj5iuSjYg7PWKMRs3abLGrqHTI8msezQtEB89XCIG8Yog0rDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T03:10:33.657248Z"},"content_sha256":"a71e6f1dc55cbdac716050184cbba7074a8cbc727ab0a1dab290443cfb8df28e","schema_version":"1.0","event_id":"sha256:a71e6f1dc55cbdac716050184cbba7074a8cbc727ab0a1dab290443cfb8df28e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D4T5YVIXQCLNY6HR7TXSUBJRUF/bundle.json","state_url":"https://pith.science/pith/D4T5YVIXQCLNY6HR7TXSUBJRUF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D4T5YVIXQCLNY6HR7TXSUBJRUF/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":"2026-08-10T03:10:33Z","links":{"resolver":"https://pith.science/pith/D4T5YVIXQCLNY6HR7TXSUBJRUF","bundle":"https://pith.science/pith/D4T5YVIXQCLNY6HR7TXSUBJRUF/bundle.json","state":"https://pith.science/pith/D4T5YVIXQCLNY6HR7TXSUBJRUF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D4T5YVIXQCLNY6HR7TXSUBJRUF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:D4T5YVIXQCLNY6HR7TXSUBJRUF","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":"876d09a2eb7bb0768353810665e8c5e25277b35b5e7966f3d6283569254b012d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2020-02-13T10:12:40Z","title_canon_sha256":"d77b2f50248c0c705dbceaf8b3382901619b9b82087df4878402469e3808db06"},"schema_version":"1.0","source":{"id":"2002.05419","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.05419","created_at":"2026-07-05T02:27:19Z"},{"alias_kind":"arxiv_version","alias_value":"2002.05419v1","created_at":"2026-07-05T02:27:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.05419","created_at":"2026-07-05T02:27:19Z"},{"alias_kind":"pith_short_12","alias_value":"D4T5YVIXQCLN","created_at":"2026-07-05T02:27:19Z"},{"alias_kind":"pith_short_16","alias_value":"D4T5YVIXQCLNY6HR","created_at":"2026-07-05T02:27:19Z"},{"alias_kind":"pith_short_8","alias_value":"D4T5YVIX","created_at":"2026-07-05T02:27:19Z"}],"graph_snapshots":[{"event_id":"sha256:a71e6f1dc55cbdac716050184cbba7074a8cbc727ab0a1dab290443cfb8df28e","target":"graph","created_at":"2026-07-05T02:27:19Z","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/2002.05419/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We reconsider a modification of the N-point amplitude of the Neveu-Schwarz (NS) model in which the tachyon becomes a pion by shifting its mass to zero and keeping the super-projective invariance of the integrand of the amplitude. For the scattering of four particles it reduces to the amplitude written by Lovelace and Shapiro that has Adler zeroes. We confirm that also the N-pion amplitude has Adler zeroes and show that it reduces to that of the non-linear $\\sigma$-model for $\\alpha' \\rightarrow 0$ keeping $F_\\pi$ fixed. The four- and six-point flavour-ordered amplitudes satisfy tree-level unit","authors_text":"Dario Consoli, Massimo Bianchi, Paolo Di Vecchia","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2020-02-13T10:12:40Z","title":"On the N-pion extension of the Lovelace-Shapiro model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.05419","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":"sha256:90b07bf5ecdffd7df235f34233bbb496bf5a8acb96334994d6309f719f69a813","target":"record","created_at":"2026-07-05T02:27:19Z","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":"876d09a2eb7bb0768353810665e8c5e25277b35b5e7966f3d6283569254b012d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2020-02-13T10:12:40Z","title_canon_sha256":"d77b2f50248c0c705dbceaf8b3382901619b9b82087df4878402469e3808db06"},"schema_version":"1.0","source":{"id":"2002.05419","kind":"arxiv","version":1}},"canonical_sha256":"1f27dc55178096dc78f1fcef2a0531a15215fbcabbb0ab36cfef3ca33866c69f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f27dc55178096dc78f1fcef2a0531a15215fbcabbb0ab36cfef3ca33866c69f","first_computed_at":"2026-07-05T02:27:19.133924Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:27:19.133924Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+X3E3bj5Q6+DEi44WyjB2ZlvS29GzmYTHyx0LblZ7Z5QRziRJVMuc07ugP6SYFTd61cNSs4NKxgFQCzp4fNyCA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:27:19.134434Z","signed_message":"canonical_sha256_bytes"},"source_id":"2002.05419","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:90b07bf5ecdffd7df235f34233bbb496bf5a8acb96334994d6309f719f69a813","sha256:a71e6f1dc55cbdac716050184cbba7074a8cbc727ab0a1dab290443cfb8df28e"],"state_sha256":"4c49b725583aa3c058fbf1e096b71c37fa7788cc53ed55f5d623a511de4dce5a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J1dU3kdgJ+sqPcEhgn+/MLJPRzZLfnx7el4WGg9+loYC3f4Hc6lAciT5QXIMN4V+ntyZk7oYKpjBxriGRg4iDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T03:10:33.662237Z","bundle_sha256":"a77bf729910c2e3e4260eeb3c8bf4693ae2a4a9a12da2b8c7ac604fd0f334de9"}}