{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:CY4Y2KRWB2B2BWBAC52SVBFLQ7","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":"d129996fc0cf7168aa7def95c6e36042cfbf897b305d7eb240197f404207f02d","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"nucl-th","submitted_at":"1999-04-28T10:15:26Z","title_canon_sha256":"d5ecdd738f0fb66d0c48bdb95abc2d25dfd3f389d5584bae19115ecb24cedd05"},"schema_version":"1.0","source":{"id":"nucl-th/9904072","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-th/9904072","created_at":"2026-07-04T17:25:28Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-th/9904072v1","created_at":"2026-07-04T17:25:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-th/9904072","created_at":"2026-07-04T17:25:28Z"},{"alias_kind":"pith_short_12","alias_value":"CY4Y2KRWB2B2","created_at":"2026-07-04T17:25:28Z"},{"alias_kind":"pith_short_16","alias_value":"CY4Y2KRWB2B2BWBA","created_at":"2026-07-04T17:25:28Z"},{"alias_kind":"pith_short_8","alias_value":"CY4Y2KRW","created_at":"2026-07-04T17:25:28Z"}],"graph_snapshots":[{"event_id":"sha256:e10381601e4bcc2a140dcc6e8d22fb8cd2a09c72d6fcf11b4876070445f0a30b","target":"graph","created_at":"2026-07-04T17:25:28Z","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/nucl-th/9904072/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recent experiment indicates that the behavior exhibited by the ratios $E_{1^+}/M_{1^+}$ and $S_{1^+}/M_{1^+}$ of the $\\gamma^* N \\leftrightarrow \\Delta$ transition remain small and negative for $Q^2 \\le 4.0 GeV^2$. It implies that the perturbative QCD is still not applicable at these momentum transfers. We show that these data can be explained in a dynamical model for electromagnetic production of pions, together with a simple scaling assumption for the bare $\\gamma^* N \\Delta$ form factors. Within our model we find that the bare $\\Delta$ is almost spherical and the electric E2 and Coulomb C2 ","authors_text":"Shin Nan Yang (National Taiwan University), S. S. Kamalov","cross_cats":["hep-ph"],"headline":"","license":"","primary_cat":"nucl-th","submitted_at":"1999-04-28T10:15:26Z","title":"Pion cloud and the $Q^2-$dependence of $\\gamma^* N \\leftrightarrow \\Delta$ transition form factors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/9904072","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":"sha256:985c9583fb67a4537b8818d5febea61fd88822096d547202c8b26c9b31e8fc78","target":"record","created_at":"2026-07-04T17:25:28Z","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":"d129996fc0cf7168aa7def95c6e36042cfbf897b305d7eb240197f404207f02d","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"nucl-th","submitted_at":"1999-04-28T10:15:26Z","title_canon_sha256":"d5ecdd738f0fb66d0c48bdb95abc2d25dfd3f389d5584bae19115ecb24cedd05"},"schema_version":"1.0","source":{"id":"nucl-th/9904072","kind":"arxiv","version":1}},"canonical_sha256":"16398d2a360e83a0d82017752a84ab87f4e30be471a5a2bc6565a7c634bfa001","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16398d2a360e83a0d82017752a84ab87f4e30be471a5a2bc6565a7c634bfa001","first_computed_at":"2026-07-04T17:25:28.820435Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:25:28.820435Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j/+fGwCOieSygrN1WaLN6UrWmydC7XAmi6HufAkxEyk5cJfhWETft8qnbpBCbtI2/FXkfA0WnaaxhO24FJ72DQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:25:28.820831Z","signed_message":"canonical_sha256_bytes"},"source_id":"nucl-th/9904072","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:985c9583fb67a4537b8818d5febea61fd88822096d547202c8b26c9b31e8fc78","sha256:e10381601e4bcc2a140dcc6e8d22fb8cd2a09c72d6fcf11b4876070445f0a30b"],"state_sha256":"1d5b951bcddb7c83913098cf010bda9d590f91c28c849fc2d7b501de6f60a4ef"}