{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:W7PA5MCJKGXLHX2GBXNDELEQ2K","short_pith_number":"pith:W7PA5MCJ","canonical_record":{"source":{"id":"1607.02099","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-07-07T17:35:14Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"cee14824db9611c97d58fed9b1f742f15c5e137428d34d35a173cbd0d44688d0","abstract_canon_sha256":"a80d96fc8afe474f1b0138698ef98ebedc82d34864e59fb0555c3d29933956e3"},"schema_version":"1.0"},"canonical_sha256":"b7de0eb04951aeb3df460dda322c90d2a9083782e739c91a845bae77b6fdabb4","source":{"kind":"arxiv","id":"1607.02099","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.02099","created_at":"2026-05-18T01:00:45Z"},{"alias_kind":"arxiv_version","alias_value":"1607.02099v4","created_at":"2026-05-18T01:00:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.02099","created_at":"2026-05-18T01:00:45Z"},{"alias_kind":"pith_short_12","alias_value":"W7PA5MCJKGXL","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"W7PA5MCJKGXLHX2G","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"W7PA5MCJ","created_at":"2026-05-18T12:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:W7PA5MCJKGXLHX2GBXNDELEQ2K","target":"record","payload":{"canonical_record":{"source":{"id":"1607.02099","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-07-07T17:35:14Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"cee14824db9611c97d58fed9b1f742f15c5e137428d34d35a173cbd0d44688d0","abstract_canon_sha256":"a80d96fc8afe474f1b0138698ef98ebedc82d34864e59fb0555c3d29933956e3"},"schema_version":"1.0"},"canonical_sha256":"b7de0eb04951aeb3df460dda322c90d2a9083782e739c91a845bae77b6fdabb4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:00:45.344002Z","signature_b64":"fZDm+RroFd1dxQA6Hv5DXf6T6T2rrUPxiFGZXormEl783Mvdyy/MzLtrbJUzp4jYciXGR1BErQg2NOh26VMWAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b7de0eb04951aeb3df460dda322c90d2a9083782e739c91a845bae77b6fdabb4","last_reissued_at":"2026-05-18T01:00:45.343634Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:00:45.343634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.02099","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:00:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xsN2oCuWmxZpeAfbiQMTUyLFJQrOtlrJPYgeHlDfqC54BjPmH/khEYkXntS8HeF3tD9CcTR4RIJuSr7xGvWVDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T07:45:31.814369Z"},"content_sha256":"99c9e07c1d98ab0a5e60b3a25ee94b1f836c6e0bae1a3b4f865cd805dac74656","schema_version":"1.0","event_id":"sha256:99c9e07c1d98ab0a5e60b3a25ee94b1f836c6e0bae1a3b4f865cd805dac74656"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:W7PA5MCJKGXLHX2GBXNDELEQ2K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Changes in extensive air showers from isotropic Lorentz violation in the photon sector","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"hep-ph","authors_text":"F.R. Klinkhamer, J.S. Diaz, M. Risse","submitted_at":"2016-07-07T17:35:14Z","abstract_excerpt":"We consider a theory with isotropic nonbirefringent Lorentz violation in the photon sector and explore the effects on the development of the electromagnetic component of extensive air showers in the Earth atmosphere. Specifically, we consider the case of a \"fast\" photon with a phase velocity larger than the maximum attainable velocity of a massive Dirac fermion (this case corresponds to a negative Lorentz-violating parameter $\\kappa$ in the action). Shower photons with above-threshold energies decay promptly into electron-positron pairs, instead of decaying by the conventional production of el"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.02099","kind":"arxiv","version":4},"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":"2026-05-18T01:00:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4sI6u2zmUkdo4pOnf+jehKh+4EK5Zc0Y15NMvr+Lxgp5km7Lc06J+E6+otIZFBPeBig/mHjiB3nLfc9I3+3nAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T07:45:31.814887Z"},"content_sha256":"8ca82bdeed9940c5d2d2dae0dde2fe723b380cd4a619eb39b88d582275ddc622","schema_version":"1.0","event_id":"sha256:8ca82bdeed9940c5d2d2dae0dde2fe723b380cd4a619eb39b88d582275ddc622"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W7PA5MCJKGXLHX2GBXNDELEQ2K/bundle.json","state_url":"https://pith.science/pith/W7PA5MCJKGXLHX2GBXNDELEQ2K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W7PA5MCJKGXLHX2GBXNDELEQ2K/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":"2026-08-22T07:45:31Z","links":{"resolver":"https://pith.science/pith/W7PA5MCJKGXLHX2GBXNDELEQ2K","bundle":"https://pith.science/pith/W7PA5MCJKGXLHX2GBXNDELEQ2K/bundle.json","state":"https://pith.science/pith/W7PA5MCJKGXLHX2GBXNDELEQ2K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W7PA5MCJKGXLHX2GBXNDELEQ2K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:W7PA5MCJKGXLHX2GBXNDELEQ2K","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":"a80d96fc8afe474f1b0138698ef98ebedc82d34864e59fb0555c3d29933956e3","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-07-07T17:35:14Z","title_canon_sha256":"cee14824db9611c97d58fed9b1f742f15c5e137428d34d35a173cbd0d44688d0"},"schema_version":"1.0","source":{"id":"1607.02099","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.02099","created_at":"2026-05-18T01:00:45Z"},{"alias_kind":"arxiv_version","alias_value":"1607.02099v4","created_at":"2026-05-18T01:00:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.02099","created_at":"2026-05-18T01:00:45Z"},{"alias_kind":"pith_short_12","alias_value":"W7PA5MCJKGXL","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"W7PA5MCJKGXLHX2G","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"W7PA5MCJ","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:8ca82bdeed9940c5d2d2dae0dde2fe723b380cd4a619eb39b88d582275ddc622","target":"graph","created_at":"2026-05-18T01:00:45Z","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 consider a theory with isotropic nonbirefringent Lorentz violation in the photon sector and explore the effects on the development of the electromagnetic component of extensive air showers in the Earth atmosphere. Specifically, we consider the case of a \"fast\" photon with a phase velocity larger than the maximum attainable velocity of a massive Dirac fermion (this case corresponds to a negative Lorentz-violating parameter $\\kappa$ in the action). Shower photons with above-threshold energies decay promptly into electron-positron pairs, instead of decaying by the conventional production of el","authors_text":"F.R. Klinkhamer, J.S. Diaz, M. Risse","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-07-07T17:35:14Z","title":"Changes in extensive air showers from isotropic Lorentz violation in the photon sector"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.02099","kind":"arxiv","version":4},"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":"sha256:99c9e07c1d98ab0a5e60b3a25ee94b1f836c6e0bae1a3b4f865cd805dac74656","target":"record","created_at":"2026-05-18T01:00:45Z","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":"a80d96fc8afe474f1b0138698ef98ebedc82d34864e59fb0555c3d29933956e3","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2016-07-07T17:35:14Z","title_canon_sha256":"cee14824db9611c97d58fed9b1f742f15c5e137428d34d35a173cbd0d44688d0"},"schema_version":"1.0","source":{"id":"1607.02099","kind":"arxiv","version":4}},"canonical_sha256":"b7de0eb04951aeb3df460dda322c90d2a9083782e739c91a845bae77b6fdabb4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b7de0eb04951aeb3df460dda322c90d2a9083782e739c91a845bae77b6fdabb4","first_computed_at":"2026-05-18T01:00:45.343634Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:00:45.343634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fZDm+RroFd1dxQA6Hv5DXf6T6T2rrUPxiFGZXormEl783Mvdyy/MzLtrbJUzp4jYciXGR1BErQg2NOh26VMWAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:00:45.344002Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.02099","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:99c9e07c1d98ab0a5e60b3a25ee94b1f836c6e0bae1a3b4f865cd805dac74656","sha256:8ca82bdeed9940c5d2d2dae0dde2fe723b380cd4a619eb39b88d582275ddc622"],"state_sha256":"313a5cd1df0f8142e1da35f0b82cbb4b33f00cc7667f725df18b328fdd7c7bf7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7YWpJNWhCLbaPcyFVa7Q4L55aQecJ1lk8RyTFmbcIRwyk7/8lt+Q6piSFhCR6UQg9EjI/TaExDL07pbGNMdSBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T07:45:31.817694Z","bundle_sha256":"fc2e479667eea537cef10532c525fe7f464ddfcdbb6522fdafab5f454d0002b8"}}