{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:RSDWJUT335KT7Q5AZWI7BJPCM5","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":"5a5f7c8be9badd25ca08e027feb0eb1f7fe093b29c1383b9930f16a359740f07","cross_cats_sorted":["astro-ph.HE","hep-ex","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-08-21T20:04:58Z","title_canon_sha256":"9299fbb1f4712d6a475b0f2edb5c1fb4abb32b01f46535ddcb887ab684088774"},"schema_version":"1.0","source":{"id":"1508.05389","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.05389","created_at":"2026-05-18T01:25:31Z"},{"alias_kind":"arxiv_version","alias_value":"1508.05389v2","created_at":"2026-05-18T01:25:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.05389","created_at":"2026-05-18T01:25:31Z"},{"alias_kind":"pith_short_12","alias_value":"RSDWJUT335KT","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"RSDWJUT335KT7Q5A","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"RSDWJUT3","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:4a609f8d85a97be51f1bba4a6d5e57b7a6d23669a0b3e1e13f3e4dded764e834","target":"graph","created_at":"2026-05-18T01:25:31Z","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":"Cosmic-ray muons and especially their secondaries break apart nuclei (\"spallation\") and produce fast neutrons and beta-decay isotopes, which are backgrounds for low-energy experiments. In Super-Kamiokande, these beta decays are the dominant background in 6--18 MeV, relevant for solar neutrinos and the diffuse supernova neutrino background. In a previous paper, we showed that these spallation isotopes are produced primarily in showers, instead of in isolation. This explains an empirical spatial correlation between a peak in the muon Cherenkov light profile and the spallation decay, which Super-","authors_text":"John F. Beacom (Ohio State University), Shirley Weishi Li","cross_cats":["astro-ph.HE","hep-ex","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-08-21T20:04:58Z","title":"Tagging Spallation Backgrounds with Showers in Water-Cherenkov Detectors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.05389","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":"sha256:905650a469a6e6709fab9d39a8fc0a7258197c4e8d0a7d20ee652e105b83c6ad","target":"record","created_at":"2026-05-18T01:25:31Z","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":"5a5f7c8be9badd25ca08e027feb0eb1f7fe093b29c1383b9930f16a359740f07","cross_cats_sorted":["astro-ph.HE","hep-ex","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-08-21T20:04:58Z","title_canon_sha256":"9299fbb1f4712d6a475b0f2edb5c1fb4abb32b01f46535ddcb887ab684088774"},"schema_version":"1.0","source":{"id":"1508.05389","kind":"arxiv","version":2}},"canonical_sha256":"8c8764d27bdf553fc3a0cd91f0a5e26755cd7047e4aa167ba39b0cb9a1483cf3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8c8764d27bdf553fc3a0cd91f0a5e26755cd7047e4aa167ba39b0cb9a1483cf3","first_computed_at":"2026-05-18T01:25:31.414986Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:31.414986Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rJjrPvZvS4XRTd/4rp5LS0oYIK6T4jZB8nB9k5Varvnvb2v5CkvTmAHXLqgElmaWlb32VWSXQFjOAaZPovuzAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:31.415501Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.05389","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:905650a469a6e6709fab9d39a8fc0a7258197c4e8d0a7d20ee652e105b83c6ad","sha256:4a609f8d85a97be51f1bba4a6d5e57b7a6d23669a0b3e1e13f3e4dded764e834"],"state_sha256":"6d0508b3ded765ffdca653baf814c737e76a45ff576d119a3a260a1190b1a3eb"}