{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:NUYVK3LU3TSSWHEYTMYKFTRGU2","short_pith_number":"pith:NUYVK3LU","canonical_record":{"source":{"id":"1104.2465","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2011-04-13T12:15:53Z","cross_cats_sorted":[],"title_canon_sha256":"0f2e9a881201bb3d2f178330925407b8fcacf60b014f75aa88e6a5a38f3cbcc8","abstract_canon_sha256":"7789146ddd203b0713fdafcdb28d30bb59869e3a4639844dbe266ba14964704f"},"schema_version":"1.0"},"canonical_sha256":"6d31556d74dce52b1c989b30a2ce26a68a90f6c07a54664a80d394b24640da92","source":{"kind":"arxiv","id":"1104.2465","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.2465","created_at":"2026-05-18T03:56:35Z"},{"alias_kind":"arxiv_version","alias_value":"1104.2465v2","created_at":"2026-05-18T03:56:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.2465","created_at":"2026-05-18T03:56:35Z"},{"alias_kind":"pith_short_12","alias_value":"NUYVK3LU3TSS","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"NUYVK3LU3TSSWHEY","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"NUYVK3LU","created_at":"2026-05-18T12:26:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:NUYVK3LU3TSSWHEYTMYKFTRGU2","target":"record","payload":{"canonical_record":{"source":{"id":"1104.2465","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2011-04-13T12:15:53Z","cross_cats_sorted":[],"title_canon_sha256":"0f2e9a881201bb3d2f178330925407b8fcacf60b014f75aa88e6a5a38f3cbcc8","abstract_canon_sha256":"7789146ddd203b0713fdafcdb28d30bb59869e3a4639844dbe266ba14964704f"},"schema_version":"1.0"},"canonical_sha256":"6d31556d74dce52b1c989b30a2ce26a68a90f6c07a54664a80d394b24640da92","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:56:35.423456Z","signature_b64":"3pswvwp8XVrJxDc+ptmq2McxqUuwudtYc091Wbq3afPL1TjMjJf6IpFRKMPcEQTtAUoR4upBgcE1biJ6xgAwCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6d31556d74dce52b1c989b30a2ce26a68a90f6c07a54664a80d394b24640da92","last_reissued_at":"2026-05-18T03:56:35.423019Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:56:35.423019Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1104.2465","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":"2026-05-18T03:56:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4qw8AUVh5iIBehDOMB24AKXvCORqd9zD3tzhNDVXXgH41Jv71UtFKjVqf3Zg1sTWAzHtMWEd+nQgsq55shqcDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T09:51:11.612799Z"},"content_sha256":"81e6a991029252dabd5ef2a6b777eecd8515bd4a2130f31c1bd8aa6f7242e6cc","schema_version":"1.0","event_id":"sha256:81e6a991029252dabd5ef2a6b777eecd8515bd4a2130f31c1bd8aa6f7242e6cc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:NUYVK3LU3TSSWHEYTMYKFTRGU2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fourth Generation Majorana Neutrinos","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Alexander Lenz, Dario Schalla, Heinrich P\\\"as","submitted_at":"2011-04-13T12:15:53Z","abstract_excerpt":"We investigate the possibility of a fourth sequential generation in the lepton sector. Assuming neutrinos to be Majorana particles and starting from a recent - albeit weak - evidence for a non-zero admixture of a fourth generation neutrino from fits to weak lepton and meson decays we discuss constraints from neutrinoless double beta decay, radiative lepton decay and like-sign dilepton production at hadron colliders. Also an idea for fourth generation neutrino mass model building is briefly outlined. Here we soften the large hierarchy of the neutrino masses within an extradimensional model that"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.2465","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":"2026-05-18T03:56:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+9l0F/qqe45jaVNhdAJCTeskas15bFDQ6F0im3P0P3IVdVFxj4SeR9xTvkTvDTCDTlV9HunBnCuqnBGUEnCFBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T09:51:11.613133Z"},"content_sha256":"c8a6b2d30414e74e6cb7729ecba923c3c3a7e1f8eff2b547a5cde5755deb6d3f","schema_version":"1.0","event_id":"sha256:c8a6b2d30414e74e6cb7729ecba923c3c3a7e1f8eff2b547a5cde5755deb6d3f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NUYVK3LU3TSSWHEYTMYKFTRGU2/bundle.json","state_url":"https://pith.science/pith/NUYVK3LU3TSSWHEYTMYKFTRGU2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NUYVK3LU3TSSWHEYTMYKFTRGU2/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":"2026-06-20T09:51:11Z","links":{"resolver":"https://pith.science/pith/NUYVK3LU3TSSWHEYTMYKFTRGU2","bundle":"https://pith.science/pith/NUYVK3LU3TSSWHEYTMYKFTRGU2/bundle.json","state":"https://pith.science/pith/NUYVK3LU3TSSWHEYTMYKFTRGU2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NUYVK3LU3TSSWHEYTMYKFTRGU2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:NUYVK3LU3TSSWHEYTMYKFTRGU2","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":"7789146ddd203b0713fdafcdb28d30bb59869e3a4639844dbe266ba14964704f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2011-04-13T12:15:53Z","title_canon_sha256":"0f2e9a881201bb3d2f178330925407b8fcacf60b014f75aa88e6a5a38f3cbcc8"},"schema_version":"1.0","source":{"id":"1104.2465","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.2465","created_at":"2026-05-18T03:56:35Z"},{"alias_kind":"arxiv_version","alias_value":"1104.2465v2","created_at":"2026-05-18T03:56:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.2465","created_at":"2026-05-18T03:56:35Z"},{"alias_kind":"pith_short_12","alias_value":"NUYVK3LU3TSS","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"NUYVK3LU3TSSWHEY","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"NUYVK3LU","created_at":"2026-05-18T12:26:37Z"}],"graph_snapshots":[{"event_id":"sha256:c8a6b2d30414e74e6cb7729ecba923c3c3a7e1f8eff2b547a5cde5755deb6d3f","target":"graph","created_at":"2026-05-18T03:56:35Z","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 investigate the possibility of a fourth sequential generation in the lepton sector. Assuming neutrinos to be Majorana particles and starting from a recent - albeit weak - evidence for a non-zero admixture of a fourth generation neutrino from fits to weak lepton and meson decays we discuss constraints from neutrinoless double beta decay, radiative lepton decay and like-sign dilepton production at hadron colliders. Also an idea for fourth generation neutrino mass model building is briefly outlined. Here we soften the large hierarchy of the neutrino masses within an extradimensional model that","authors_text":"Alexander Lenz, Dario Schalla, Heinrich P\\\"as","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2011-04-13T12:15:53Z","title":"Fourth Generation Majorana Neutrinos"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.2465","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":"sha256:81e6a991029252dabd5ef2a6b777eecd8515bd4a2130f31c1bd8aa6f7242e6cc","target":"record","created_at":"2026-05-18T03:56:35Z","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":"7789146ddd203b0713fdafcdb28d30bb59869e3a4639844dbe266ba14964704f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2011-04-13T12:15:53Z","title_canon_sha256":"0f2e9a881201bb3d2f178330925407b8fcacf60b014f75aa88e6a5a38f3cbcc8"},"schema_version":"1.0","source":{"id":"1104.2465","kind":"arxiv","version":2}},"canonical_sha256":"6d31556d74dce52b1c989b30a2ce26a68a90f6c07a54664a80d394b24640da92","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6d31556d74dce52b1c989b30a2ce26a68a90f6c07a54664a80d394b24640da92","first_computed_at":"2026-05-18T03:56:35.423019Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:56:35.423019Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3pswvwp8XVrJxDc+ptmq2McxqUuwudtYc091Wbq3afPL1TjMjJf6IpFRKMPcEQTtAUoR4upBgcE1biJ6xgAwCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:56:35.423456Z","signed_message":"canonical_sha256_bytes"},"source_id":"1104.2465","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:81e6a991029252dabd5ef2a6b777eecd8515bd4a2130f31c1bd8aa6f7242e6cc","sha256:c8a6b2d30414e74e6cb7729ecba923c3c3a7e1f8eff2b547a5cde5755deb6d3f"],"state_sha256":"9a175e94b9c4837fdadf491760d94945c3c0eaa87e2f6b4d396f3633baeef125"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7CVu2bbVdsySoGnGGLC9iBZIrucSKrtG1fGperR4s+/VLr3DSxKS+ZIbDqFPCiIpW73hPtdzNnwwu1PMB4C1Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T09:51:11.614902Z","bundle_sha256":"ac91596bc88deded5ff73f5f90ffcf1c304bc14a8a50cb21b2c9dfe705f1b614"}}