{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:RSDWJUT335KT7Q5AZWI7BJPCM5","short_pith_number":"pith:RSDWJUT3","schema_version":"1.0","canonical_sha256":"8c8764d27bdf553fc3a0cd91f0a5e26755cd7047e4aa167ba39b0cb9a1483cf3","source":{"kind":"arxiv","id":"1508.05389","version":2},"attestation_state":"computed","paper":{"title":"Tagging Spallation Backgrounds with Showers in Water-Cherenkov Detectors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","hep-ex","hep-ph"],"primary_cat":"physics.ins-det","authors_text":"John F. Beacom (Ohio State University), Shirley Weishi Li","submitted_at":"2015-08-21T20:04:58Z","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-"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1508.05389","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2015-08-21T20:04:58Z","cross_cats_sorted":["astro-ph.HE","hep-ex","hep-ph"],"title_canon_sha256":"9299fbb1f4712d6a475b0f2edb5c1fb4abb32b01f46535ddcb887ab684088774","abstract_canon_sha256":"5a5f7c8be9badd25ca08e027feb0eb1f7fe093b29c1383b9930f16a359740f07"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:31.415501Z","signature_b64":"rJjrPvZvS4XRTd/4rp5LS0oYIK6T4jZB8nB9k5Varvnvb2v5CkvTmAHXLqgElmaWlb32VWSXQFjOAaZPovuzAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8c8764d27bdf553fc3a0cd91f0a5e26755cd7047e4aa167ba39b0cb9a1483cf3","last_reissued_at":"2026-05-18T01:25:31.414986Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:31.414986Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Tagging Spallation Backgrounds with Showers in Water-Cherenkov Detectors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","hep-ex","hep-ph"],"primary_cat":"physics.ins-det","authors_text":"John F. Beacom (Ohio State University), Shirley Weishi Li","submitted_at":"2015-08-21T20:04:58Z","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-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.05389","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1508.05389","created_at":"2026-05-18T01:25:31.415058+00:00"},{"alias_kind":"arxiv_version","alias_value":"1508.05389v2","created_at":"2026-05-18T01:25:31.415058+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.05389","created_at":"2026-05-18T01:25:31.415058+00:00"},{"alias_kind":"pith_short_12","alias_value":"RSDWJUT335KT","created_at":"2026-05-18T12:29:39.896362+00:00"},{"alias_kind":"pith_short_16","alias_value":"RSDWJUT335KT7Q5A","created_at":"2026-05-18T12:29:39.896362+00:00"},{"alias_kind":"pith_short_8","alias_value":"RSDWJUT3","created_at":"2026-05-18T12:29:39.896362+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/RSDWJUT335KT7Q5AZWI7BJPCM5","json":"https://pith.science/pith/RSDWJUT335KT7Q5AZWI7BJPCM5.json","graph_json":"https://pith.science/api/pith-number/RSDWJUT335KT7Q5AZWI7BJPCM5/graph.json","events_json":"https://pith.science/api/pith-number/RSDWJUT335KT7Q5AZWI7BJPCM5/events.json","paper":"https://pith.science/paper/RSDWJUT3"},"agent_actions":{"view_html":"https://pith.science/pith/RSDWJUT335KT7Q5AZWI7BJPCM5","download_json":"https://pith.science/pith/RSDWJUT335KT7Q5AZWI7BJPCM5.json","view_paper":"https://pith.science/paper/RSDWJUT3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1508.05389&json=true","fetch_graph":"https://pith.science/api/pith-number/RSDWJUT335KT7Q5AZWI7BJPCM5/graph.json","fetch_events":"https://pith.science/api/pith-number/RSDWJUT335KT7Q5AZWI7BJPCM5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/RSDWJUT335KT7Q5AZWI7BJPCM5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/RSDWJUT335KT7Q5AZWI7BJPCM5/action/storage_attestation","attest_author":"https://pith.science/pith/RSDWJUT335KT7Q5AZWI7BJPCM5/action/author_attestation","sign_citation":"https://pith.science/pith/RSDWJUT335KT7Q5AZWI7BJPCM5/action/citation_signature","submit_replication":"https://pith.science/pith/RSDWJUT335KT7Q5AZWI7BJPCM5/action/replication_record"}},"created_at":"2026-05-18T01:25:31.415058+00:00","updated_at":"2026-05-18T01:25:31.415058+00:00"}