{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:H4TA2ZV2POV5FCEXU33UH4S5GD","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":"a016274df855a00d85b06ce8b82c2bf1954e455f1c6c704510df79c21dbec595","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"2007-03-14T18:24:52Z","title_canon_sha256":"b831d8dc50bc1d102d3381826b11d532fd5778df133499461351d5e43ffbda9a"},"schema_version":"1.0","source":{"id":"hep-ph/0703144","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/0703144","created_at":"2026-07-04T15:25:15Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0703144v2","created_at":"2026-07-04T15:25:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0703144","created_at":"2026-07-04T15:25:15Z"},{"alias_kind":"pith_short_12","alias_value":"H4TA2ZV2POV5","created_at":"2026-07-04T15:25:15Z"},{"alias_kind":"pith_short_16","alias_value":"H4TA2ZV2POV5FCEX","created_at":"2026-07-04T15:25:15Z"},{"alias_kind":"pith_short_8","alias_value":"H4TA2ZV2","created_at":"2026-07-04T15:25:15Z"}],"graph_snapshots":[{"event_id":"sha256:981ef6cf3d914045990d1c783f7b3a1dab155ffe0cc2292c474fdc6c8ffdcc41","target":"graph","created_at":"2026-07-04T15:25:15Z","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/hep-ph/0703144/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Particles with millicharge q and sub-eV mass can be produced in photon-photon collisions, distorting the energy spectrum of the Cosmic Microwave Background. We derive the conservative bound q < 10^-7 e (as well as model-dependent bounds two orders of magnitude stronger), incompatible with proposed interpretations of the PVLAS anomaly based on millicharged production or on millicharged-mediated axion-like couplings.","authors_text":"Alessandro Melchiorri, Alessandro Strumia, Antonello Polosa","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"2007-03-14T18:24:52Z","title":"New bounds on millicharged particles from cosmology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0703144","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:e897e9667502f8e458426b9e94c725202ddd53bee658495c27c5b492ea1f020e","target":"record","created_at":"2026-07-04T15:25:15Z","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":"a016274df855a00d85b06ce8b82c2bf1954e455f1c6c704510df79c21dbec595","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"2007-03-14T18:24:52Z","title_canon_sha256":"b831d8dc50bc1d102d3381826b11d532fd5778df133499461351d5e43ffbda9a"},"schema_version":"1.0","source":{"id":"hep-ph/0703144","kind":"arxiv","version":2}},"canonical_sha256":"3f260d66ba7babd28897a6f743f25d30f05c51a022ff2cf6ec0c127accd6bbe3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3f260d66ba7babd28897a6f743f25d30f05c51a022ff2cf6ec0c127accd6bbe3","first_computed_at":"2026-07-04T15:25:15.508760Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:25:15.508760Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NG8RJu0c4XdOnqr3B67P40Rg/C9VnQoQ8jRXWWAumHHf9GT2Phh3e+EJn8l/dM5eG/VFkmJy9rpBBWKW2apFDw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:25:15.509179Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/0703144","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e897e9667502f8e458426b9e94c725202ddd53bee658495c27c5b492ea1f020e","sha256:981ef6cf3d914045990d1c783f7b3a1dab155ffe0cc2292c474fdc6c8ffdcc41"],"state_sha256":"f1ae368a6b29e7edc8b882d3a8a66b224c1dda95648efbc1c0149e2274655bc6"}