{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:GRZMOQWCSGJPQLCDU2H2MY4K45","short_pith_number":"pith:GRZMOQWC","canonical_record":{"source":{"id":"2607.15368","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2026-07-16T18:11:18Z","cross_cats_sorted":[],"title_canon_sha256":"08fc31b061d5eaaf8ff9f53899b97ff80dc5d54655d1e7ed26e294d714022cb5","abstract_canon_sha256":"62ef69b8ccd09ff00dfd3135f7a08abc173c2e206ddf050c3ef70c01f64c372e"},"schema_version":"1.0"},"canonical_sha256":"3472c742c29192f82c43a68fa6638ae777254c1695199b5dde334becfb358d06","source":{"kind":"arxiv","id":"2607.15368","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.15368","created_at":"2026-07-20T00:18:29Z"},{"alias_kind":"arxiv_version","alias_value":"2607.15368v1","created_at":"2026-07-20T00:18:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.15368","created_at":"2026-07-20T00:18:29Z"},{"alias_kind":"pith_short_12","alias_value":"GRZMOQWCSGJP","created_at":"2026-07-20T00:18:29Z"},{"alias_kind":"pith_short_16","alias_value":"GRZMOQWCSGJPQLCD","created_at":"2026-07-20T00:18:29Z"},{"alias_kind":"pith_short_8","alias_value":"GRZMOQWC","created_at":"2026-07-20T00:18:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:GRZMOQWCSGJPQLCDU2H2MY4K45","target":"record","payload":{"canonical_record":{"source":{"id":"2607.15368","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2026-07-16T18:11:18Z","cross_cats_sorted":[],"title_canon_sha256":"08fc31b061d5eaaf8ff9f53899b97ff80dc5d54655d1e7ed26e294d714022cb5","abstract_canon_sha256":"62ef69b8ccd09ff00dfd3135f7a08abc173c2e206ddf050c3ef70c01f64c372e"},"schema_version":"1.0"},"canonical_sha256":"3472c742c29192f82c43a68fa6638ae777254c1695199b5dde334becfb358d06","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-20T00:18:29.722333Z","signature_b64":"8st/340nufZuESo4yB+onF/ZfBWQKEO4AWhxkhyOWWyExUscwXZ7QGqh+YFxm5IzyaLZ6jZ1AGWg3Vb8QXLHAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3472c742c29192f82c43a68fa6638ae777254c1695199b5dde334becfb358d06","last_reissued_at":"2026-07-20T00:18:29.721475Z","signature_status":"signed_v1","first_computed_at":"2026-07-20T00:18:29.721475Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.15368","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-20T00:18:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TjilRz/h0licpQ55cFGOvMHaMuWMJWA133Lo2po+tMj695GRlR3DkYox7wz/6dOQlUZ0qW6eyyXto9+psE2FCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:01:27.531415Z"},"content_sha256":"41439db3538cca7019d64d962eacb200ba3cdc104af074668ec8a1fb1ca2afcd","schema_version":"1.0","event_id":"sha256:41439db3538cca7019d64d962eacb200ba3cdc104af074668ec8a1fb1ca2afcd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:GRZMOQWCSGJPQLCDU2H2MY4K45","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Muon Bremsstrahlung as a New Probe of Dark Sector at Neutrino Experiments","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Aparajitha Karthikeyan, Bhaskar Dutta, Mudit Rai, P. S. Bhupal Dev, Zahra Tabrizi","submitted_at":"2026-07-16T18:11:18Z","abstract_excerpt":"We show that muon bremsstrahlung provides a new production mechanism for light new physics at accelerator neutrino experiments. The intense, highly collimated muon beam produced alongside the neutrino beam in meson decays provides a powerful source for the bremsstrahlung production of new physics when it impinges on the beam dump at these facilities. As a benchmark scenario, we consider a muonphilic scalar coupled to Heavy Neutral Leptons (HNLs) and show that muon bremsstrahlung enables the production of HNLs with masses beyond the kinematic reach of meson decays. Using this new production mec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.15368","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2607.15368/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-20T00:18:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S/C1PpdlRzGdH51IdIBOReMq/eIMBm6otjOCFoxnsQZGXh/1Q0XwoN6WCFO/evTkthHeKCNMaz2mcSxWeS5tDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T18:01:27.531911Z"},"content_sha256":"da00ff948c43b1b7fcdde8e0f13751e4e3b81858931e26046f0241259e5345e7","schema_version":"1.0","event_id":"sha256:da00ff948c43b1b7fcdde8e0f13751e4e3b81858931e26046f0241259e5345e7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GRZMOQWCSGJPQLCDU2H2MY4K45/bundle.json","state_url":"https://pith.science/pith/GRZMOQWCSGJPQLCDU2H2MY4K45/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GRZMOQWCSGJPQLCDU2H2MY4K45/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":"2026-08-03T18:01:27Z","links":{"resolver":"https://pith.science/pith/GRZMOQWCSGJPQLCDU2H2MY4K45","bundle":"https://pith.science/pith/GRZMOQWCSGJPQLCDU2H2MY4K45/bundle.json","state":"https://pith.science/pith/GRZMOQWCSGJPQLCDU2H2MY4K45/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GRZMOQWCSGJPQLCDU2H2MY4K45/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:GRZMOQWCSGJPQLCDU2H2MY4K45","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":"62ef69b8ccd09ff00dfd3135f7a08abc173c2e206ddf050c3ef70c01f64c372e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2026-07-16T18:11:18Z","title_canon_sha256":"08fc31b061d5eaaf8ff9f53899b97ff80dc5d54655d1e7ed26e294d714022cb5"},"schema_version":"1.0","source":{"id":"2607.15368","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.15368","created_at":"2026-07-20T00:18:29Z"},{"alias_kind":"arxiv_version","alias_value":"2607.15368v1","created_at":"2026-07-20T00:18:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.15368","created_at":"2026-07-20T00:18:29Z"},{"alias_kind":"pith_short_12","alias_value":"GRZMOQWCSGJP","created_at":"2026-07-20T00:18:29Z"},{"alias_kind":"pith_short_16","alias_value":"GRZMOQWCSGJPQLCD","created_at":"2026-07-20T00:18:29Z"},{"alias_kind":"pith_short_8","alias_value":"GRZMOQWC","created_at":"2026-07-20T00:18:29Z"}],"graph_snapshots":[{"event_id":"sha256:da00ff948c43b1b7fcdde8e0f13751e4e3b81858931e26046f0241259e5345e7","target":"graph","created_at":"2026-07-20T00:18:29Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2607.15368/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We show that muon bremsstrahlung provides a new production mechanism for light new physics at accelerator neutrino experiments. The intense, highly collimated muon beam produced alongside the neutrino beam in meson decays provides a powerful source for the bremsstrahlung production of new physics when it impinges on the beam dump at these facilities. As a benchmark scenario, we consider a muonphilic scalar coupled to Heavy Neutral Leptons (HNLs) and show that muon bremsstrahlung enables the production of HNLs with masses beyond the kinematic reach of meson decays. Using this new production mec","authors_text":"Aparajitha Karthikeyan, Bhaskar Dutta, Mudit Rai, P. S. Bhupal Dev, Zahra Tabrizi","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2026-07-16T18:11:18Z","title":"Muon Bremsstrahlung as a New Probe of Dark Sector at Neutrino Experiments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.15368","kind":"arxiv","version":1},"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":"sha256:41439db3538cca7019d64d962eacb200ba3cdc104af074668ec8a1fb1ca2afcd","target":"record","created_at":"2026-07-20T00:18:29Z","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":"62ef69b8ccd09ff00dfd3135f7a08abc173c2e206ddf050c3ef70c01f64c372e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"hep-ph","submitted_at":"2026-07-16T18:11:18Z","title_canon_sha256":"08fc31b061d5eaaf8ff9f53899b97ff80dc5d54655d1e7ed26e294d714022cb5"},"schema_version":"1.0","source":{"id":"2607.15368","kind":"arxiv","version":1}},"canonical_sha256":"3472c742c29192f82c43a68fa6638ae777254c1695199b5dde334becfb358d06","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3472c742c29192f82c43a68fa6638ae777254c1695199b5dde334becfb358d06","first_computed_at":"2026-07-20T00:18:29.721475Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-20T00:18:29.721475Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8st/340nufZuESo4yB+onF/ZfBWQKEO4AWhxkhyOWWyExUscwXZ7QGqh+YFxm5IzyaLZ6jZ1AGWg3Vb8QXLHAA==","signature_status":"signed_v1","signed_at":"2026-07-20T00:18:29.722333Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.15368","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:41439db3538cca7019d64d962eacb200ba3cdc104af074668ec8a1fb1ca2afcd","sha256:da00ff948c43b1b7fcdde8e0f13751e4e3b81858931e26046f0241259e5345e7"],"state_sha256":"b3f6b4bc65aafb77ff27b5313f6380bf82a9ad87767428abf8909e9f662410c7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aZUrg2cLIionIrzdC/D2tlnCpK+UIFOyhgMxZ75gi1vcJQBDoZsFzVzwrBvvmhB5BThMgZrTsW9QE+k72Jb1BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T18:01:27.536102Z","bundle_sha256":"b08abadf06a5e9f4e131231223b9ab0103772536df17e31a928044ae55e0e4ae"}}