{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:W36ISOX2YNR4Y3OXVXBHWFYYJO","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":"88f17ca24876932aee1e3a82a8c8ad3740f6fcfe339cd90b17835a37a64f4590","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"hep-th","submitted_at":"1999-08-09T20:12:27Z","title_canon_sha256":"8bf2479068a09c0f5c4cc0937ae6a35f6eaf9310592a58db10c0584b33ddd419"},"schema_version":"1.0","source":{"id":"hep-th/9908072","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9908072","created_at":"2026-07-04T16:14:56Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9908072v3","created_at":"2026-07-04T16:14:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9908072","created_at":"2026-07-04T16:14:56Z"},{"alias_kind":"pith_short_12","alias_value":"W36ISOX2YNR4","created_at":"2026-07-04T16:14:56Z"},{"alias_kind":"pith_short_16","alias_value":"W36ISOX2YNR4Y3OX","created_at":"2026-07-04T16:14:56Z"},{"alias_kind":"pith_short_8","alias_value":"W36ISOX2","created_at":"2026-07-04T16:14:56Z"}],"graph_snapshots":[{"event_id":"sha256:04d15913a862122e1923c87665a9ab7a3d10b05350e5e7d8e034d2ed961febc1","target":"graph","created_at":"2026-07-04T16:14:56Z","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-th/9908072/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We derive the rules to construct type IIB compact orientifolds in six and four dimensions including D-branes and anti-D-branes. Even though the models are non-supersymmetric due to the presence of the anti-D-branes, we show that it is easy to construct large classes of models free of tachyons. Brane-antibrane annihilation can be prevented for instance by considering models with branes and antibranes stuck at different fixed points in the compact space. We construct several anomaly-free and tachyon-free six-dimensional orientifolds containing D9-branes and anti-D5-branes. This setup allows to c","authors_text":"A. M. Uranga, G. Aldazabal","cross_cats":["hep-ph"],"headline":"","license":"","primary_cat":"hep-th","submitted_at":"1999-08-09T20:12:27Z","title":"Tachyon-free Non-supersymmetric Type IIB Orientifolds via Brane-Antibrane Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9908072","kind":"arxiv","version":3},"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":"sha256:42a4b77310fd332a3136e7042ba7429d17501db6e8d24c4f1391684e1b3d628a","target":"record","created_at":"2026-07-04T16:14:56Z","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":"88f17ca24876932aee1e3a82a8c8ad3740f6fcfe339cd90b17835a37a64f4590","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"hep-th","submitted_at":"1999-08-09T20:12:27Z","title_canon_sha256":"8bf2479068a09c0f5c4cc0937ae6a35f6eaf9310592a58db10c0584b33ddd419"},"schema_version":"1.0","source":{"id":"hep-th/9908072","kind":"arxiv","version":3}},"canonical_sha256":"b6fc893afac363cc6dd7adc27b17184b8bf45da13f6355e3827dba3db34ba597","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b6fc893afac363cc6dd7adc27b17184b8bf45da13f6355e3827dba3db34ba597","first_computed_at":"2026-07-04T16:14:56.070096Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:14:56.070096Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7SOUjxDmHaiw0iQ1xHiOcKwv0ahBpGFjjujmvX1Ti14O9A/Pk+qJguYcPHKZYI4xSJlKB8cyiomwZOh3QBCxCw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:14:56.070506Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-th/9908072","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:42a4b77310fd332a3136e7042ba7429d17501db6e8d24c4f1391684e1b3d628a","sha256:04d15913a862122e1923c87665a9ab7a3d10b05350e5e7d8e034d2ed961febc1"],"state_sha256":"f59f8c5eab689786a14d96f9b04436588e6230ba98af4ad4b740facd0e3317a0"}