{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:COXTL7LMLQAIOCT7DRPKO5UKWG","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":"9e5c266ab4b219bc14b5d116bda569b949c88bf7595db9cc7444a7b634b3156d","cross_cats_sorted":[],"license":"","primary_cat":"hep-th","submitted_at":"1999-02-28T17:24:36Z","title_canon_sha256":"d4ef887c27c0f57b5fb87b01cd5b4b8c7942c2ec30e9b393634bbeeb728de3ae"},"schema_version":"1.0","source":{"id":"hep-th/9903008","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9903008","created_at":"2026-05-18T04:35:15Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9903008v1","created_at":"2026-05-18T04:35:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9903008","created_at":"2026-05-18T04:35:15Z"},{"alias_kind":"pith_short_12","alias_value":"COXTL7LMLQAI","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"COXTL7LMLQAIOCT7","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"COXTL7LM","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:78f341e9ce8bf93cabb987496cea758335f9c5c82d103df712ec1690d7319598","target":"graph","created_at":"2026-05-18T04:35:15Z","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"},"paper":{"abstract_excerpt":"We examine the effect of perturbative string loops on the cosmological pre-big-bang evolution. We study loop corrections derived from heterotic string theory compactified on a $Z_N$ orbifold and we consider the effect of the all-order loop corrections to the Kahler potential and of the corrections to gravitational couplings, including both threshold corrections and corrections due to the mixed Kahler-gravitational anomaly. We find that string loops can drive the evolution into the region of the parameter space where a graceful exit is in principle possible, and we find solutions that, in the s","authors_text":"Michele Maggiore, Riccardo Sturani, Stefano Foffa","cross_cats":[],"headline":"","license":"","primary_cat":"hep-th","submitted_at":"1999-02-28T17:24:36Z","title":"Loop corrections and graceful exit in string cosmology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9903008","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":"sha256:1198781b2c618e03bbac4c045af7100947bbc3764bd4bbd2eb81fede379e1b53","target":"record","created_at":"2026-05-18T04:35:15Z","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":"9e5c266ab4b219bc14b5d116bda569b949c88bf7595db9cc7444a7b634b3156d","cross_cats_sorted":[],"license":"","primary_cat":"hep-th","submitted_at":"1999-02-28T17:24:36Z","title_canon_sha256":"d4ef887c27c0f57b5fb87b01cd5b4b8c7942c2ec30e9b393634bbeeb728de3ae"},"schema_version":"1.0","source":{"id":"hep-th/9903008","kind":"arxiv","version":1}},"canonical_sha256":"13af35fd6c5c00870a7f1c5ea7768ab1a3cdfc0ec4a0da87ddd911debcf8ce61","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"13af35fd6c5c00870a7f1c5ea7768ab1a3cdfc0ec4a0da87ddd911debcf8ce61","first_computed_at":"2026-05-18T04:35:15.660579Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:35:15.660579Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gtgW14hw18X5UOlGwgXi4jBBw930XLxKzH8V/inLxBbKur0geVkJ2TA0cHFzDT6K1LL2Z6+YRlDkSBoiMXf0CA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:35:15.661109Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-th/9903008","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1198781b2c618e03bbac4c045af7100947bbc3764bd4bbd2eb81fede379e1b53","sha256:78f341e9ce8bf93cabb987496cea758335f9c5c82d103df712ec1690d7319598"],"state_sha256":"27acc753a900b70785c507b7f2ae1e673ff9ffe3ec1ae08d201ce5dda475b6cc"}