{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:BXX52CIQKZWGICGH5Q4ZBL2NJ5","short_pith_number":"pith:BXX52CIQ","canonical_record":{"source":{"id":"1501.06823","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2015-01-27T17:17:21Z","cross_cats_sorted":[],"title_canon_sha256":"79c9c33af39cf24aee0dba97c683599765d6274aa4d7084d6298f2451451bce1","abstract_canon_sha256":"4bc7e72a5ce633b2ebf8957632673df226d0ce80798928fb697c5b8060e53692"},"schema_version":"1.0"},"canonical_sha256":"0defdd0910566c6408c7ec3990af4d4f422ad57935049ac269300cbba2982b4d","source":{"kind":"arxiv","id":"1501.06823","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.06823","created_at":"2026-05-18T01:46:21Z"},{"alias_kind":"arxiv_version","alias_value":"1501.06823v2","created_at":"2026-05-18T01:46:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.06823","created_at":"2026-05-18T01:46:21Z"},{"alias_kind":"pith_short_12","alias_value":"BXX52CIQKZWG","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"BXX52CIQKZWGICGH","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"BXX52CIQ","created_at":"2026-05-18T12:29:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:BXX52CIQKZWGICGH5Q4ZBL2NJ5","target":"record","payload":{"canonical_record":{"source":{"id":"1501.06823","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2015-01-27T17:17:21Z","cross_cats_sorted":[],"title_canon_sha256":"79c9c33af39cf24aee0dba97c683599765d6274aa4d7084d6298f2451451bce1","abstract_canon_sha256":"4bc7e72a5ce633b2ebf8957632673df226d0ce80798928fb697c5b8060e53692"},"schema_version":"1.0"},"canonical_sha256":"0defdd0910566c6408c7ec3990af4d4f422ad57935049ac269300cbba2982b4d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:21.990904Z","signature_b64":"43xUSgVm7ssyO6UQYkzIpWmEIyuFiQCNT4eUhC+bVXiG/fqHwrMxbyHvW15K00Yl2ajDLX9PfkPpHeN06LQFDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0defdd0910566c6408c7ec3990af4d4f422ad57935049ac269300cbba2982b4d","last_reissued_at":"2026-05-18T01:46:21.990389Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:21.990389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.06823","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":"2026-05-18T01:46:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1PUOuSHjeMxX8J0LlFwAfIHQEz4gq6xLpBnzxtat33dyr24pLB6kzrJHkFPjriXKexRt0IZLUITDG+bMzFQVBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T12:06:25.264707Z"},"content_sha256":"2eca8cc89a4805a5f56074b376b28e15fd7b83facc78c3b7b0154a765e6d9436","schema_version":"1.0","event_id":"sha256:2eca8cc89a4805a5f56074b376b28e15fd7b83facc78c3b7b0154a765e6d9436"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:BXX52CIQKZWGICGH5Q4ZBL2NJ5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observation of Lambda H-4 hyperhydrogen by decay-pion spectroscopy in electron scattering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Esser, A. Margaryan, A. Sanchez Lorente, A. Weber, B. S. Schlimme, C. Ayerbe Gayoso, C. Rappold, C. Sfienti, D. Bosnar, E. Kim, F. Schulz, H. Kanda, H. Merkel, I. Fri\\v{s}\\v{c}i\\'c, J. Kusaka, J. Pochodzalla, J. Reinhold, K. Tsukada, K. Yoshida, L. Debenjak, L. Tang, M. Kaneta, M. Mihovilovi\\v{c}, M. O. Distler, M. Schoth, M. Thiel, O. Borodina, O. Hashimoto, P. Achenbach, R. B\\\"ohm, S. Hirose, S. Nagao, S. N. Nakamura, S. S\\'anchez Majos, S. \\v{S}irca, T. Gogami, T. R. Saito, U. M\\\"uller, V. Bozkurt, Y. Fujii, Y. Kohl","submitted_at":"2015-01-27T17:17:21Z","abstract_excerpt":"At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a Be-9 target in order to study the ground-state masses of Lambda-hypernuclei. Positively charged kaons were detected by a short-orbit spectrometer with a broad momentum acceptance at zero degree forward angles with respect to the beam, efficiently tagging the production of strangeness in the target nucleus. In coincidence, negatively charged decay-pions were detected by two independent high-resolution spectrometers. About 10^3 pionic weak decays of h"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.06823","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":"2026-05-18T01:46:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bMaQtom1nSui92pWOTG3M58Gj8WuWYV0iucsCl8qTLeTqZK2TenZumtAfSXsaA1VkFvYgAJl/R+62EguEbSeAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T12:06:25.265623Z"},"content_sha256":"7a2dc7cfd6fee6b4b2523a9a8de0aaed5f19ce924900ec584a4cd6a420b2d318","schema_version":"1.0","event_id":"sha256:7a2dc7cfd6fee6b4b2523a9a8de0aaed5f19ce924900ec584a4cd6a420b2d318"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BXX52CIQKZWGICGH5Q4ZBL2NJ5/bundle.json","state_url":"https://pith.science/pith/BXX52CIQKZWGICGH5Q4ZBL2NJ5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BXX52CIQKZWGICGH5Q4ZBL2NJ5/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":"2026-08-14T12:06:25Z","links":{"resolver":"https://pith.science/pith/BXX52CIQKZWGICGH5Q4ZBL2NJ5","bundle":"https://pith.science/pith/BXX52CIQKZWGICGH5Q4ZBL2NJ5/bundle.json","state":"https://pith.science/pith/BXX52CIQKZWGICGH5Q4ZBL2NJ5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BXX52CIQKZWGICGH5Q4ZBL2NJ5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:BXX52CIQKZWGICGH5Q4ZBL2NJ5","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":"4bc7e72a5ce633b2ebf8957632673df226d0ce80798928fb697c5b8060e53692","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2015-01-27T17:17:21Z","title_canon_sha256":"79c9c33af39cf24aee0dba97c683599765d6274aa4d7084d6298f2451451bce1"},"schema_version":"1.0","source":{"id":"1501.06823","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.06823","created_at":"2026-05-18T01:46:21Z"},{"alias_kind":"arxiv_version","alias_value":"1501.06823v2","created_at":"2026-05-18T01:46:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.06823","created_at":"2026-05-18T01:46:21Z"},{"alias_kind":"pith_short_12","alias_value":"BXX52CIQKZWG","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"BXX52CIQKZWGICGH","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"BXX52CIQ","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:7a2dc7cfd6fee6b4b2523a9a8de0aaed5f19ce924900ec584a4cd6a420b2d318","target":"graph","created_at":"2026-05-18T01:46:21Z","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":"At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a Be-9 target in order to study the ground-state masses of Lambda-hypernuclei. Positively charged kaons were detected by a short-orbit spectrometer with a broad momentum acceptance at zero degree forward angles with respect to the beam, efficiently tagging the production of strangeness in the target nucleus. In coincidence, negatively charged decay-pions were detected by two independent high-resolution spectrometers. About 10^3 pionic weak decays of h","authors_text":"A. Esser, A. Margaryan, A. Sanchez Lorente, A. Weber, B. S. Schlimme, C. Ayerbe Gayoso, C. Rappold, C. Sfienti, D. Bosnar, E. Kim, F. Schulz, H. Kanda, H. Merkel, I. Fri\\v{s}\\v{c}i\\'c, J. Kusaka, J. Pochodzalla, J. Reinhold, K. Tsukada, K. Yoshida, L. Debenjak, L. Tang, M. Kaneta, M. Mihovilovi\\v{c}, M. O. Distler, M. Schoth, M. Thiel, O. Borodina, O. Hashimoto, P. Achenbach, R. B\\\"ohm, S. Hirose, S. Nagao, S. N. Nakamura, S. S\\'anchez Majos, S. \\v{S}irca, T. Gogami, T. R. Saito, U. M\\\"uller, V. Bozkurt, Y. Fujii, Y. Kohl","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2015-01-27T17:17:21Z","title":"Observation of Lambda H-4 hyperhydrogen by decay-pion spectroscopy in electron scattering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.06823","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":"sha256:2eca8cc89a4805a5f56074b376b28e15fd7b83facc78c3b7b0154a765e6d9436","target":"record","created_at":"2026-05-18T01:46:21Z","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":"4bc7e72a5ce633b2ebf8957632673df226d0ce80798928fb697c5b8060e53692","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2015-01-27T17:17:21Z","title_canon_sha256":"79c9c33af39cf24aee0dba97c683599765d6274aa4d7084d6298f2451451bce1"},"schema_version":"1.0","source":{"id":"1501.06823","kind":"arxiv","version":2}},"canonical_sha256":"0defdd0910566c6408c7ec3990af4d4f422ad57935049ac269300cbba2982b4d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0defdd0910566c6408c7ec3990af4d4f422ad57935049ac269300cbba2982b4d","first_computed_at":"2026-05-18T01:46:21.990389Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:21.990389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"43xUSgVm7ssyO6UQYkzIpWmEIyuFiQCNT4eUhC+bVXiG/fqHwrMxbyHvW15K00Yl2ajDLX9PfkPpHeN06LQFDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:21.990904Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.06823","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2eca8cc89a4805a5f56074b376b28e15fd7b83facc78c3b7b0154a765e6d9436","sha256:7a2dc7cfd6fee6b4b2523a9a8de0aaed5f19ce924900ec584a4cd6a420b2d318"],"state_sha256":"90be78e61366d0f176a27833ac7a630fe93a627c07104f2c66aec8234279c12a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mZtzzqmc5BZjiuEPxBjxytk3DKliVMeECkkduJUx7AJiDtrilmlWHP199QaKwYQ92r6bpCR8mBsj5ytycA6eAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T12:06:25.272334Z","bundle_sha256":"415aa7837b34b66d7045d42fabf52ec94d2f902ce82e90ffaaa69ee10dcf9ae5"}}