{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:3QXE7YRXCTWGIU2AWERDDDFUCX","short_pith_number":"pith:3QXE7YRX","canonical_record":{"source":{"id":"1109.4154","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-09-19T20:02:56Z","cross_cats_sorted":[],"title_canon_sha256":"a39a7b0a9ac533bbae9c3141216bb8341a498630474f1cbcb595d7689ac2796e","abstract_canon_sha256":"4b988c2c14cdd2fa90d63a0cae73ec570ea3f840dc770fbe6f7dce5e00e95e7c"},"schema_version":"1.0"},"canonical_sha256":"dc2e4fe23714ec645340b122318cb415fa7385fbdc51f35fda01805258df748c","source":{"kind":"arxiv","id":"1109.4154","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.4154","created_at":"2026-05-18T03:27:43Z"},{"alias_kind":"arxiv_version","alias_value":"1109.4154v2","created_at":"2026-05-18T03:27:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.4154","created_at":"2026-05-18T03:27:43Z"},{"alias_kind":"pith_short_12","alias_value":"3QXE7YRXCTWG","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"3QXE7YRXCTWGIU2A","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"3QXE7YRX","created_at":"2026-05-18T12:26:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:3QXE7YRXCTWGIU2AWERDDDFUCX","target":"record","payload":{"canonical_record":{"source":{"id":"1109.4154","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-09-19T20:02:56Z","cross_cats_sorted":[],"title_canon_sha256":"a39a7b0a9ac533bbae9c3141216bb8341a498630474f1cbcb595d7689ac2796e","abstract_canon_sha256":"4b988c2c14cdd2fa90d63a0cae73ec570ea3f840dc770fbe6f7dce5e00e95e7c"},"schema_version":"1.0"},"canonical_sha256":"dc2e4fe23714ec645340b122318cb415fa7385fbdc51f35fda01805258df748c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:27:43.001250Z","signature_b64":"2MTH/0vRx7SRFyROSZyPiuWM4QrvsC2E2sqC5uAhOsI1tyU5TY82zI+7/UdeP/FBw2y9szK9ZBykcvBJwt/LBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dc2e4fe23714ec645340b122318cb415fa7385fbdc51f35fda01805258df748c","last_reissued_at":"2026-05-18T03:27:43.000750Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:27:43.000750Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.4154","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":"2026-05-18T03:27:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"brPtZ7dw5SIa4AAy2tWA0LZXoi51w+0hOcvbMAmullM+jNoNHco0L8VzET/dxReObADNTDH/xLtrxfyJJKB3Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T09:19:38.511560Z"},"content_sha256":"915daae562dc7974c7b753f2102503621f2d8ec53d51f12192f4f95258e88f98","schema_version":"1.0","event_id":"sha256:915daae562dc7974c7b753f2102503621f2d8ec53d51f12192f4f95258e88f98"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:3QXE7YRXCTWGIU2AWERDDDFUCX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Depth Requirements for a Tonne-scale 76Ge Neutrinoless Double-beta Decay Experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. G. Schubert, A. Hime, A. Knecht, A. L. Hallin, A. R. Young, A. S. Barabash, A. W. P. Poon, B. A. Wolfe, B. D. LaFerriere, B. H. LaRoque, C. D. Christofferson, C. -H. Yu, C. Keller, C. Zhang, D. C. Combs, D. C. Radford, D. G. Phillips II, D. -M. Mei, D. Steele, E. W. Hoppe, E. Yakushev, F. E. Bertrand, F. M. Fraenkle, F. T. Avignone III, G. K. Giovanetti, G. Perumpilly, G. Prior, H. Ejiri, H. O. Back, I. Vanyushin, J. A. Detwiler, J. C. Loach, J. D. Kephart, J. E. Fast, J. Esterline, J. F. Wilkerson, J. H. Merriman, J. I. Collar, J. Leon, J. L. Orrell, J. Strain, K. Gusey, K. J. Keeter, K. J. Snavely, K. Rielage, K. Thomas, K. Vetter, K. Vorren, L. E. Leviner, L. Mizouni, M. A. Howe, M. Bergevin, M. Boswell, M. Busch, M. C. Ronquest, M. E. Keillor, M. F. Kidd, M. G. Marino, M. Horton, M. L. Miller, M. Nomachi, M. P. Green, M. Shirchenko, N. Fields, N. R. Overman, O. Kochetov, P. Finnerty, P. J. Doe, R. A. Johnson, R. D. Martin, R. G. H. Robertson, R. Hazama, R. Henning, R. J. Cooper, R. L. Varner, R. T. Kouzes, S. Howard, S. I. Konovalov, S. MacMullin, S. R. Elliott, The MAJORANA Collaboration: E. Aguayo, T. Shima, V. Brudanin, V. Egorov, V. E. Guiseppe, V. M. Gehman, V. Sobolev, V. Timkin, V. Yumatov, W. Tornow, Y-D. Chan, Yu. Efremenko","submitted_at":"2011-09-19T20:02:56Z","abstract_excerpt":"Neutrinoless double-beta decay experiments can potentially determine the Majorana or Dirac nature of the neutrino, and aid in understanding the neutrino absolute mass scale and hierarchy. Future 76Ge-based searches target a half-life sensitivity of >10^27 y to explore the inverted neutrino mass hierarchy. Reaching this sensitivity will require a background rate of <1 count tonne^-1 y^-1 in a 4-keV-wide spectral region of interest surrounding the Q value of the decay. We investigate the overburden required to reach this background goal in a tonne-scale experiment with a compact (copper and lead"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.4154","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":"2026-05-18T03:27:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dmYX5n9vjPrBe8yelmXDAz7tCUKQ1cPrRKVigEsf2I5VU03+9pGtCRQn9Xz1S5iIDASfjbQjesgMR4kbesbeAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T09:19:38.511911Z"},"content_sha256":"ed54917c3cd0e305a8da4cfa1f75adc7902bb6072d386e0f1380020c2f4a7643","schema_version":"1.0","event_id":"sha256:ed54917c3cd0e305a8da4cfa1f75adc7902bb6072d386e0f1380020c2f4a7643"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3QXE7YRXCTWGIU2AWERDDDFUCX/bundle.json","state_url":"https://pith.science/pith/3QXE7YRXCTWGIU2AWERDDDFUCX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3QXE7YRXCTWGIU2AWERDDDFUCX/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":"2026-07-07T09:19:38Z","links":{"resolver":"https://pith.science/pith/3QXE7YRXCTWGIU2AWERDDDFUCX","bundle":"https://pith.science/pith/3QXE7YRXCTWGIU2AWERDDDFUCX/bundle.json","state":"https://pith.science/pith/3QXE7YRXCTWGIU2AWERDDDFUCX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3QXE7YRXCTWGIU2AWERDDDFUCX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:3QXE7YRXCTWGIU2AWERDDDFUCX","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":"4b988c2c14cdd2fa90d63a0cae73ec570ea3f840dc770fbe6f7dce5e00e95e7c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-09-19T20:02:56Z","title_canon_sha256":"a39a7b0a9ac533bbae9c3141216bb8341a498630474f1cbcb595d7689ac2796e"},"schema_version":"1.0","source":{"id":"1109.4154","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.4154","created_at":"2026-05-18T03:27:43Z"},{"alias_kind":"arxiv_version","alias_value":"1109.4154v2","created_at":"2026-05-18T03:27:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.4154","created_at":"2026-05-18T03:27:43Z"},{"alias_kind":"pith_short_12","alias_value":"3QXE7YRXCTWG","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"3QXE7YRXCTWGIU2A","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"3QXE7YRX","created_at":"2026-05-18T12:26:18Z"}],"graph_snapshots":[{"event_id":"sha256:ed54917c3cd0e305a8da4cfa1f75adc7902bb6072d386e0f1380020c2f4a7643","target":"graph","created_at":"2026-05-18T03:27:43Z","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":"Neutrinoless double-beta decay experiments can potentially determine the Majorana or Dirac nature of the neutrino, and aid in understanding the neutrino absolute mass scale and hierarchy. Future 76Ge-based searches target a half-life sensitivity of >10^27 y to explore the inverted neutrino mass hierarchy. Reaching this sensitivity will require a background rate of <1 count tonne^-1 y^-1 in a 4-keV-wide spectral region of interest surrounding the Q value of the decay. We investigate the overburden required to reach this background goal in a tonne-scale experiment with a compact (copper and lead","authors_text":"A. G. Schubert, A. Hime, A. Knecht, A. L. Hallin, A. R. Young, A. S. Barabash, A. W. P. Poon, B. A. Wolfe, B. D. LaFerriere, B. H. LaRoque, C. D. Christofferson, C. -H. Yu, C. Keller, C. Zhang, D. C. Combs, D. C. Radford, D. G. Phillips II, D. -M. Mei, D. Steele, E. W. Hoppe, E. Yakushev, F. E. Bertrand, F. M. Fraenkle, F. T. Avignone III, G. K. Giovanetti, G. Perumpilly, G. Prior, H. Ejiri, H. O. Back, I. Vanyushin, J. A. Detwiler, J. C. Loach, J. D. Kephart, J. E. Fast, J. Esterline, J. F. Wilkerson, J. H. Merriman, J. I. Collar, J. Leon, J. L. Orrell, J. Strain, K. Gusey, K. J. Keeter, K. J. Snavely, K. Rielage, K. Thomas, K. Vetter, K. Vorren, L. E. Leviner, L. Mizouni, M. A. Howe, M. Bergevin, M. Boswell, M. Busch, M. C. Ronquest, M. E. Keillor, M. F. Kidd, M. G. Marino, M. Horton, M. L. Miller, M. Nomachi, M. P. Green, M. Shirchenko, N. Fields, N. R. Overman, O. Kochetov, P. Finnerty, P. J. Doe, R. A. Johnson, R. D. Martin, R. G. H. Robertson, R. Hazama, R. Henning, R. J. Cooper, R. L. Varner, R. T. Kouzes, S. Howard, S. I. Konovalov, S. MacMullin, S. R. Elliott, The MAJORANA Collaboration: E. Aguayo, T. Shima, V. Brudanin, V. Egorov, V. E. Guiseppe, V. M. Gehman, V. Sobolev, V. Timkin, V. Yumatov, W. Tornow, Y-D. Chan, Yu. Efremenko","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-09-19T20:02:56Z","title":"Depth Requirements for a Tonne-scale 76Ge Neutrinoless Double-beta Decay Experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.4154","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":"sha256:915daae562dc7974c7b753f2102503621f2d8ec53d51f12192f4f95258e88f98","target":"record","created_at":"2026-05-18T03:27:43Z","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":"4b988c2c14cdd2fa90d63a0cae73ec570ea3f840dc770fbe6f7dce5e00e95e7c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-09-19T20:02:56Z","title_canon_sha256":"a39a7b0a9ac533bbae9c3141216bb8341a498630474f1cbcb595d7689ac2796e"},"schema_version":"1.0","source":{"id":"1109.4154","kind":"arxiv","version":2}},"canonical_sha256":"dc2e4fe23714ec645340b122318cb415fa7385fbdc51f35fda01805258df748c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dc2e4fe23714ec645340b122318cb415fa7385fbdc51f35fda01805258df748c","first_computed_at":"2026-05-18T03:27:43.000750Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:27:43.000750Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2MTH/0vRx7SRFyROSZyPiuWM4QrvsC2E2sqC5uAhOsI1tyU5TY82zI+7/UdeP/FBw2y9szK9ZBykcvBJwt/LBA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:27:43.001250Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.4154","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:915daae562dc7974c7b753f2102503621f2d8ec53d51f12192f4f95258e88f98","sha256:ed54917c3cd0e305a8da4cfa1f75adc7902bb6072d386e0f1380020c2f4a7643"],"state_sha256":"cbb9638adc5e6262becd30bba44513263433a0f13dd70294bb6b21c9cb95a8f8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F+TQZoOXfwXVY9Spmtm7f1OAPveQhw48b+THAsnxbAVaFl9AS7UMI2u8FKrlUoirDPgHOd2Zf8a83CUpQ10lCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T09:19:38.513825Z","bundle_sha256":"4fc75c88722941905b127b7d73c1bd67adbe073db1be37f596126df2fbfccfbb"}}