{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1998:6YA7D7P7ESTVXG37UBWLPGRXC6","short_pith_number":"pith:6YA7D7P7","schema_version":"1.0","canonical_sha256":"f601f1fdff24a75b9b7fa06cb79a37178f812840b962970f3a083ced92fdf7c6","source":{"kind":"arxiv","id":"hep-ph/9809483","version":2},"attestation_state":"computed","paper":{"title":"Hard exclusive electroproduction of two pions and their resonances","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"M.V. Polyakov","submitted_at":"1998-09-22T17:50:16Z","abstract_excerpt":"We study the hard exclusive production of two pions in the virtual photon fragmentation region with various invariant masses including the resonance region. The amplitude is expressed in terms of two-pion light cone distribution amplitudes ($2\\pi$DA's). We derive dispersion relations for these amplitudes, which enables us to fix them completely in terms of $\\pi\\pi$ scattering phases and a few low-energy subtraction constants determind by the effective chiral lagrangian. Quantitative estimates of the resonance as well $\\pi\\pi$ background DA's at low normalization point are made. We also prove c"},"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":"hep-ph/9809483","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1998-09-22T17:50:16Z","cross_cats_sorted":[],"title_canon_sha256":"dc3d134bc4871f26374bfcaaebc4c9a8035027df0f52463cb4e462d4e588c4f9","abstract_canon_sha256":"d2c7d683631dcba5220da2680271364e72ee3809aee86fdb8799f50da325b0f7"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:18:24.984731Z","signature_b64":"OgSPLKkNIHw0HYJueWccrrA5W0AKNViV345m2jDSBihJo9UDxQGd035TzfWIkjYKnCCoeyyBeSgbXDLZhHUBBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f601f1fdff24a75b9b7fa06cb79a37178f812840b962970f3a083ced92fdf7c6","last_reissued_at":"2026-07-04T15:18:24.984233Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:18:24.984233Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Hard exclusive electroproduction of two pions and their resonances","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"M.V. Polyakov","submitted_at":"1998-09-22T17:50:16Z","abstract_excerpt":"We study the hard exclusive production of two pions in the virtual photon fragmentation region with various invariant masses including the resonance region. The amplitude is expressed in terms of two-pion light cone distribution amplitudes ($2\\pi$DA's). We derive dispersion relations for these amplitudes, which enables us to fix them completely in terms of $\\pi\\pi$ scattering phases and a few low-energy subtraction constants determind by the effective chiral lagrangian. Quantitative estimates of the resonance as well $\\pi\\pi$ background DA's at low normalization point are made. We also prove c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9809483","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-ph/9809483/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9809483","created_at":"2026-07-04T15:18:24.984289+00:00"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9809483v2","created_at":"2026-07-04T15:18:24.984289+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9809483","created_at":"2026-07-04T15:18:24.984289+00:00"},{"alias_kind":"pith_short_12","alias_value":"6YA7D7P7ESTV","created_at":"2026-07-04T15:18:24.984289+00:00"},{"alias_kind":"pith_short_16","alias_value":"6YA7D7P7ESTVXG37","created_at":"2026-07-04T15:18:24.984289+00:00"},{"alias_kind":"pith_short_8","alias_value":"6YA7D7P7","created_at":"2026-07-04T15:18:24.984289+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2507.06025","citing_title":"Gravitational form factors of pion in a nonlocal quark model","ref_index":12,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/6YA7D7P7ESTVXG37UBWLPGRXC6","json":"https://pith.science/pith/6YA7D7P7ESTVXG37UBWLPGRXC6.json","graph_json":"https://pith.science/api/pith-number/6YA7D7P7ESTVXG37UBWLPGRXC6/graph.json","events_json":"https://pith.science/api/pith-number/6YA7D7P7ESTVXG37UBWLPGRXC6/events.json","paper":"https://pith.science/paper/6YA7D7P7"},"agent_actions":{"view_html":"https://pith.science/pith/6YA7D7P7ESTVXG37UBWLPGRXC6","download_json":"https://pith.science/pith/6YA7D7P7ESTVXG37UBWLPGRXC6.json","view_paper":"https://pith.science/paper/6YA7D7P7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=hep-ph/9809483&json=true","fetch_graph":"https://pith.science/api/pith-number/6YA7D7P7ESTVXG37UBWLPGRXC6/graph.json","fetch_events":"https://pith.science/api/pith-number/6YA7D7P7ESTVXG37UBWLPGRXC6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6YA7D7P7ESTVXG37UBWLPGRXC6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6YA7D7P7ESTVXG37UBWLPGRXC6/action/storage_attestation","attest_author":"https://pith.science/pith/6YA7D7P7ESTVXG37UBWLPGRXC6/action/author_attestation","sign_citation":"https://pith.science/pith/6YA7D7P7ESTVXG37UBWLPGRXC6/action/citation_signature","submit_replication":"https://pith.science/pith/6YA7D7P7ESTVXG37UBWLPGRXC6/action/replication_record"}},"created_at":"2026-07-04T15:18:24.984289+00:00","updated_at":"2026-07-04T15:18:24.984289+00:00"}