{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:HHQPDYYP2B7Z55PRVHPKBIQRIK","short_pith_number":"pith:HHQPDYYP","canonical_record":{"source":{"id":"1404.2767","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2014-04-10T10:48:07Z","cross_cats_sorted":[],"title_canon_sha256":"d06b253aa5084da4237832c37a39c54202067cdc6b4163c7799adfd5837a425b","abstract_canon_sha256":"ce13f6e991f58ffb0a886a88ad7b874b98679a5493db3d671290af869c4eef1e"},"schema_version":"1.0"},"canonical_sha256":"39e0f1e30fd07f9ef5f1a9dea0a21142bfa4dcb876071cc056eadb51e12c5e1b","source":{"kind":"arxiv","id":"1404.2767","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.2767","created_at":"2026-05-18T01:43:35Z"},{"alias_kind":"arxiv_version","alias_value":"1404.2767v2","created_at":"2026-05-18T01:43:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.2767","created_at":"2026-05-18T01:43:35Z"},{"alias_kind":"pith_short_12","alias_value":"HHQPDYYP2B7Z","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"HHQPDYYP2B7Z55PR","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"HHQPDYYP","created_at":"2026-05-18T12:28:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:HHQPDYYP2B7Z55PRVHPKBIQRIK","target":"record","payload":{"canonical_record":{"source":{"id":"1404.2767","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2014-04-10T10:48:07Z","cross_cats_sorted":[],"title_canon_sha256":"d06b253aa5084da4237832c37a39c54202067cdc6b4163c7799adfd5837a425b","abstract_canon_sha256":"ce13f6e991f58ffb0a886a88ad7b874b98679a5493db3d671290af869c4eef1e"},"schema_version":"1.0"},"canonical_sha256":"39e0f1e30fd07f9ef5f1a9dea0a21142bfa4dcb876071cc056eadb51e12c5e1b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:43:35.733946Z","signature_b64":"9fI/a7AI20zbwCNlbMdFqy5sXBPoGQw2flH3xp4hg/384HcfP+2gIyjsaD68Nq5BvBB7WKhVfUMxUiCm/OjHCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"39e0f1e30fd07f9ef5f1a9dea0a21142bfa4dcb876071cc056eadb51e12c5e1b","last_reissued_at":"2026-05-18T01:43:35.733456Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:43:35.733456Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.2767","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:43:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vwbFPZTH7zadQtO3iYGAva0Fk6Rcn+Fb5dyn8nsgzHcijjFztLf+0MopjdOa9MT6rLRuJxNptvXppAc9pzI6BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:35:57.991522Z"},"content_sha256":"5051f7c152ffb632fd65b16c7efb07b317a3d8f2a3157ecf32c2cead2ad31eff","schema_version":"1.0","event_id":"sha256:5051f7c152ffb632fd65b16c7efb07b317a3d8f2a3157ecf32c2cead2ad31eff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:HHQPDYYP2B7Z55PRVHPKBIQRIK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Heterotic Standard Model with B-L Symmetry and a Stable Proton","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Andrei Constantin, Andre Lukas, Evgeny I. Buchbinder","submitted_at":"2014-04-10T10:48:07Z","abstract_excerpt":"We consider heterotic Calabi-Yau compactifications with S(U(4)xU(1)) background gauge fields. These models lead to gauge groups with an additional U(1) factor which, under certain conditions, can combine with hypercharge to a B-L symmetry. The associated gauge boson is automatically super-massive and, hence, does not constitute a phenomenological problem. We illustrate this class of compactifications with a model based on the monad construction, which leads to a supersymmetric standard model with three families of quarks and leptons, one pair of Higgs doublets, three right-handed neutrinos and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.2767","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:43:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T+fcFf7P4Kk2XKsSQp4xiv25X0926s4UUPUpdY863uXl5UG/SjQ4mO9DiKcSQm+YJDRlPycg7lGh9wjzOxFUDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:35:57.992223Z"},"content_sha256":"b34485c0078816aa3a5a1627961e438347b8a9c8401a9893d3db21a306f85404","schema_version":"1.0","event_id":"sha256:b34485c0078816aa3a5a1627961e438347b8a9c8401a9893d3db21a306f85404"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HHQPDYYP2B7Z55PRVHPKBIQRIK/bundle.json","state_url":"https://pith.science/pith/HHQPDYYP2B7Z55PRVHPKBIQRIK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HHQPDYYP2B7Z55PRVHPKBIQRIK/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T21:35:57Z","links":{"resolver":"https://pith.science/pith/HHQPDYYP2B7Z55PRVHPKBIQRIK","bundle":"https://pith.science/pith/HHQPDYYP2B7Z55PRVHPKBIQRIK/bundle.json","state":"https://pith.science/pith/HHQPDYYP2B7Z55PRVHPKBIQRIK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HHQPDYYP2B7Z55PRVHPKBIQRIK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:HHQPDYYP2B7Z55PRVHPKBIQRIK","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":"ce13f6e991f58ffb0a886a88ad7b874b98679a5493db3d671290af869c4eef1e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2014-04-10T10:48:07Z","title_canon_sha256":"d06b253aa5084da4237832c37a39c54202067cdc6b4163c7799adfd5837a425b"},"schema_version":"1.0","source":{"id":"1404.2767","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.2767","created_at":"2026-05-18T01:43:35Z"},{"alias_kind":"arxiv_version","alias_value":"1404.2767v2","created_at":"2026-05-18T01:43:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.2767","created_at":"2026-05-18T01:43:35Z"},{"alias_kind":"pith_short_12","alias_value":"HHQPDYYP2B7Z","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"HHQPDYYP2B7Z55PR","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"HHQPDYYP","created_at":"2026-05-18T12:28:30Z"}],"graph_snapshots":[{"event_id":"sha256:b34485c0078816aa3a5a1627961e438347b8a9c8401a9893d3db21a306f85404","target":"graph","created_at":"2026-05-18T01:43:35Z","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 consider heterotic Calabi-Yau compactifications with S(U(4)xU(1)) background gauge fields. These models lead to gauge groups with an additional U(1) factor which, under certain conditions, can combine with hypercharge to a B-L symmetry. The associated gauge boson is automatically super-massive and, hence, does not constitute a phenomenological problem. We illustrate this class of compactifications with a model based on the monad construction, which leads to a supersymmetric standard model with three families of quarks and leptons, one pair of Higgs doublets, three right-handed neutrinos and","authors_text":"Andrei Constantin, Andre Lukas, Evgeny I. Buchbinder","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2014-04-10T10:48:07Z","title":"A Heterotic Standard Model with B-L Symmetry and a Stable Proton"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.2767","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":"sha256:5051f7c152ffb632fd65b16c7efb07b317a3d8f2a3157ecf32c2cead2ad31eff","target":"record","created_at":"2026-05-18T01:43:35Z","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":"ce13f6e991f58ffb0a886a88ad7b874b98679a5493db3d671290af869c4eef1e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2014-04-10T10:48:07Z","title_canon_sha256":"d06b253aa5084da4237832c37a39c54202067cdc6b4163c7799adfd5837a425b"},"schema_version":"1.0","source":{"id":"1404.2767","kind":"arxiv","version":2}},"canonical_sha256":"39e0f1e30fd07f9ef5f1a9dea0a21142bfa4dcb876071cc056eadb51e12c5e1b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"39e0f1e30fd07f9ef5f1a9dea0a21142bfa4dcb876071cc056eadb51e12c5e1b","first_computed_at":"2026-05-18T01:43:35.733456Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:35.733456Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9fI/a7AI20zbwCNlbMdFqy5sXBPoGQw2flH3xp4hg/384HcfP+2gIyjsaD68Nq5BvBB7WKhVfUMxUiCm/OjHCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:35.733946Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.2767","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5051f7c152ffb632fd65b16c7efb07b317a3d8f2a3157ecf32c2cead2ad31eff","sha256:b34485c0078816aa3a5a1627961e438347b8a9c8401a9893d3db21a306f85404"],"state_sha256":"6338cac34ab745d901b2cc56e3644c696b0d7cd5144564176862e6c53fa6ab53"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YOZKYr13Dqrn+oFz88qZvpVI1h3NV8pWJ197YoiLyBQIisCt6l/1qV5aebrR68n60Tj4mKooORyqQicyZWdaBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T21:35:57.995443Z","bundle_sha256":"5511beafde773360a4f819c1e94207fdd039e25e83821a899329a9db320e140a"}}