{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1995:XB5F5SESFDUWXKQNMPJZOSBVLH","short_pith_number":"pith:XB5F5SES","canonical_record":{"source":{"id":"cond-mat/9507021","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat","submitted_at":"1995-07-07T22:36:18Z","cross_cats_sorted":["supr-con"],"title_canon_sha256":"80a6c9a89f5599cb3c93ca76c147117acbab68b7feea83420b439fae853fc73c","abstract_canon_sha256":"241c18eb8c915166487a3692069319e97c96df1e4cd9d3f098449870496edcd8"},"schema_version":"1.0"},"canonical_sha256":"b87a5ec89228e96baa0d63d397483559edea2e5cdd603996f3351fba9ee962d4","source":{"kind":"arxiv","id":"cond-mat/9507021","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9507021","created_at":"2026-07-04T15:58:34Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9507021v1","created_at":"2026-07-04T15:58:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9507021","created_at":"2026-07-04T15:58:34Z"},{"alias_kind":"pith_short_12","alias_value":"XB5F5SESFDUW","created_at":"2026-07-04T15:58:34Z"},{"alias_kind":"pith_short_16","alias_value":"XB5F5SESFDUWXKQN","created_at":"2026-07-04T15:58:34Z"},{"alias_kind":"pith_short_8","alias_value":"XB5F5SES","created_at":"2026-07-04T15:58:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1995:XB5F5SESFDUWXKQNMPJZOSBVLH","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/9507021","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat","submitted_at":"1995-07-07T22:36:18Z","cross_cats_sorted":["supr-con"],"title_canon_sha256":"80a6c9a89f5599cb3c93ca76c147117acbab68b7feea83420b439fae853fc73c","abstract_canon_sha256":"241c18eb8c915166487a3692069319e97c96df1e4cd9d3f098449870496edcd8"},"schema_version":"1.0"},"canonical_sha256":"b87a5ec89228e96baa0d63d397483559edea2e5cdd603996f3351fba9ee962d4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:58:34.210267Z","signature_b64":"3x+FMD9mC4FH2OmRseVSBANU2FVfwlZ7fLHgRjUaQX2kqGjFYA3d9bvY+QrnROt6iOPLdrce+9n2toPEiQHXCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b87a5ec89228e96baa0d63d397483559edea2e5cdd603996f3351fba9ee962d4","last_reissued_at":"2026-07-04T15:58:34.209884Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:58:34.209884Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/9507021","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:58:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3K3ML24F2Jdcj5GRrQYAOJQezr6M8tSSFR2aZobXu4amW3jBmsU/5qymk3z/rFe1YrhNaKYelv3g9LiMufi+Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T22:39:38.852471Z"},"content_sha256":"f22c783ccb0cb2474b1f0d7f49e12ee159252cda792e55ac4e119e85048bc0a8","schema_version":"1.0","event_id":"sha256:f22c783ccb0cb2474b1f0d7f49e12ee159252cda792e55ac4e119e85048bc0a8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1995:XB5F5SESFDUWXKQNMPJZOSBVLH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Polarization Selection Rules and Superconducting Gap Anisotropy in $Bi_2Sr_2CaCu_2O_8$","license":"","headline":"","cross_cats":["supr-con"],"primary_cat":"cond-mat","authors_text":"A.F. Bellman, H. Ding, J.C. Campuzano, M. Randeria, M.R. Norman","submitted_at":"1995-07-07T22:36:18Z","abstract_excerpt":"We discuss polarization selection rules for angle-resolved photoemission spectroscopy in Bi2212. Using these we show that the ``hump'' in the superconducting gap observed in the $X$ quadrant in our earlier work is not on the main $CuO_2$ band, but rather on an umklapp band arising from the structural superlattice. The intrinsic gap is most likely quite small over a range of $\\pm 10^\\circ$ about the diagonal directions."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9507021","kind":"arxiv","version":1},"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/cond-mat/9507021/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:58:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HmjZtwJhBZVQbAoVd/jWf5zFkOF4xA+pCMjLajJpqN3QF/cTIYjCvQw2jw7JvTq5NDTYnIEURDHzMedizjdSBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T22:39:38.853073Z"},"content_sha256":"6b9643d2a25a0ab961b14cf6a49c555b5ae8fd9ec360494f4d74c971d75b040c","schema_version":"1.0","event_id":"sha256:6b9643d2a25a0ab961b14cf6a49c555b5ae8fd9ec360494f4d74c971d75b040c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XB5F5SESFDUWXKQNMPJZOSBVLH/bundle.json","state_url":"https://pith.science/pith/XB5F5SESFDUWXKQNMPJZOSBVLH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XB5F5SESFDUWXKQNMPJZOSBVLH/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":"2026-08-06T22:39:38Z","links":{"resolver":"https://pith.science/pith/XB5F5SESFDUWXKQNMPJZOSBVLH","bundle":"https://pith.science/pith/XB5F5SESFDUWXKQNMPJZOSBVLH/bundle.json","state":"https://pith.science/pith/XB5F5SESFDUWXKQNMPJZOSBVLH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XB5F5SESFDUWXKQNMPJZOSBVLH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1995:XB5F5SESFDUWXKQNMPJZOSBVLH","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":"241c18eb8c915166487a3692069319e97c96df1e4cd9d3f098449870496edcd8","cross_cats_sorted":["supr-con"],"license":"","primary_cat":"cond-mat","submitted_at":"1995-07-07T22:36:18Z","title_canon_sha256":"80a6c9a89f5599cb3c93ca76c147117acbab68b7feea83420b439fae853fc73c"},"schema_version":"1.0","source":{"id":"cond-mat/9507021","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9507021","created_at":"2026-07-04T15:58:34Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9507021v1","created_at":"2026-07-04T15:58:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9507021","created_at":"2026-07-04T15:58:34Z"},{"alias_kind":"pith_short_12","alias_value":"XB5F5SESFDUW","created_at":"2026-07-04T15:58:34Z"},{"alias_kind":"pith_short_16","alias_value":"XB5F5SESFDUWXKQN","created_at":"2026-07-04T15:58:34Z"},{"alias_kind":"pith_short_8","alias_value":"XB5F5SES","created_at":"2026-07-04T15:58:34Z"}],"graph_snapshots":[{"event_id":"sha256:6b9643d2a25a0ab961b14cf6a49c555b5ae8fd9ec360494f4d74c971d75b040c","target":"graph","created_at":"2026-07-04T15:58:34Z","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/cond-mat/9507021/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We discuss polarization selection rules for angle-resolved photoemission spectroscopy in Bi2212. Using these we show that the ``hump'' in the superconducting gap observed in the $X$ quadrant in our earlier work is not on the main $CuO_2$ band, but rather on an umklapp band arising from the structural superlattice. The intrinsic gap is most likely quite small over a range of $\\pm 10^\\circ$ about the diagonal directions.","authors_text":"A.F. Bellman, H. Ding, J.C. Campuzano, M. Randeria, M.R. Norman","cross_cats":["supr-con"],"headline":"","license":"","primary_cat":"cond-mat","submitted_at":"1995-07-07T22:36:18Z","title":"Polarization Selection Rules and Superconducting Gap Anisotropy in $Bi_2Sr_2CaCu_2O_8$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9507021","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:f22c783ccb0cb2474b1f0d7f49e12ee159252cda792e55ac4e119e85048bc0a8","target":"record","created_at":"2026-07-04T15:58:34Z","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":"241c18eb8c915166487a3692069319e97c96df1e4cd9d3f098449870496edcd8","cross_cats_sorted":["supr-con"],"license":"","primary_cat":"cond-mat","submitted_at":"1995-07-07T22:36:18Z","title_canon_sha256":"80a6c9a89f5599cb3c93ca76c147117acbab68b7feea83420b439fae853fc73c"},"schema_version":"1.0","source":{"id":"cond-mat/9507021","kind":"arxiv","version":1}},"canonical_sha256":"b87a5ec89228e96baa0d63d397483559edea2e5cdd603996f3351fba9ee962d4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b87a5ec89228e96baa0d63d397483559edea2e5cdd603996f3351fba9ee962d4","first_computed_at":"2026-07-04T15:58:34.209884Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:58:34.209884Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3x+FMD9mC4FH2OmRseVSBANU2FVfwlZ7fLHgRjUaQX2kqGjFYA3d9bvY+QrnROt6iOPLdrce+9n2toPEiQHXCA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:58:34.210267Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/9507021","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f22c783ccb0cb2474b1f0d7f49e12ee159252cda792e55ac4e119e85048bc0a8","sha256:6b9643d2a25a0ab961b14cf6a49c555b5ae8fd9ec360494f4d74c971d75b040c"],"state_sha256":"21ca24af1fb1d89a3a9cae5042cae9e4015fdbef93f0bc041136883f7f95d99c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h8bqkDfXBD0BEiS/08k3lIjFPCSbMF7lh21YuAcT5aQaOWBN2pUgMRGVkKGMWrMNDdbDVbOCLJeeI+9vf+8oAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T22:39:38.856639Z","bundle_sha256":"7094a5eadfe1af9be6aee5687a7cb4bee54d84260ae11e5df1bfa482c6008896"}}