{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:HKQTTVNS3UU54PGPGPJSTPWF75","short_pith_number":"pith:HKQTTVNS","canonical_record":{"source":{"id":"0706.3409","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2007-06-25T19:52:46Z","cross_cats_sorted":["astro-ph"],"title_canon_sha256":"21c3c2b501d0573bc900e0ed8225d83cac46a4723ea2a72a47417a51b04548c9","abstract_canon_sha256":"6ef1e81b2bfc4438013ec03b8942c1f2f110276ccbc8dc80032dd682480aa0b8"},"schema_version":"1.0"},"canonical_sha256":"3aa139d5b2dd29de3ccf33d329bec5ff48958a2ee3162182a200d76851df601a","source":{"kind":"arxiv","id":"0706.3409","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0706.3409","created_at":"2026-05-18T02:35:30Z"},{"alias_kind":"arxiv_version","alias_value":"0706.3409v2","created_at":"2026-05-18T02:35:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.3409","created_at":"2026-05-18T02:35:30Z"},{"alias_kind":"pith_short_12","alias_value":"HKQTTVNS3UU5","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"HKQTTVNS3UU54PGP","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"HKQTTVNS","created_at":"2026-05-18T12:25:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:HKQTTVNS3UU54PGPGPJSTPWF75","target":"record","payload":{"canonical_record":{"source":{"id":"0706.3409","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2007-06-25T19:52:46Z","cross_cats_sorted":["astro-ph"],"title_canon_sha256":"21c3c2b501d0573bc900e0ed8225d83cac46a4723ea2a72a47417a51b04548c9","abstract_canon_sha256":"6ef1e81b2bfc4438013ec03b8942c1f2f110276ccbc8dc80032dd682480aa0b8"},"schema_version":"1.0"},"canonical_sha256":"3aa139d5b2dd29de3ccf33d329bec5ff48958a2ee3162182a200d76851df601a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:30.892219Z","signature_b64":"pIO6Q3KPH6x7k2mrNCYoXtvhU5TIC0nIFZzXuRLRYIeyYOx8IDYesDNJGGBAwSehPM/0NXoZkHkszMMlYe54DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3aa139d5b2dd29de3ccf33d329bec5ff48958a2ee3162182a200d76851df601a","last_reissued_at":"2026-05-18T02:35:30.891718Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:30.891718Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0706.3409","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":"2026-05-18T02:35:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r8iKREUGMrpBXvPv0EF9ONgFrXD5ryqc64oIv8K93EY6LIcEPATTX4s2UTEI92NlWyPAU3WXWDZyyxJ7uwxoCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T06:43:47.198563Z"},"content_sha256":"f0799791de933a83534dfde0fc48fe9e4f882657ceb9df09d4cc1536bc89744c","schema_version":"1.0","event_id":"sha256:f0799791de933a83534dfde0fc48fe9e4f882657ceb9df09d4cc1536bc89744c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:HKQTTVNS3UU54PGPGPJSTPWF75","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spinless photon dark matter from two universal extra dimensions","license":"","headline":"","cross_cats":["astro-ph"],"primary_cat":"hep-ph","authors_text":"Bogdan A. Dobrescu, Dan Hooper, Kyoungchul Kong, Rakhi Mahbubani","submitted_at":"2007-06-25T19:52:46Z","abstract_excerpt":"We explore the properties of dark matter in theories with two universal extra dimensions, where the lightest Kaluza-Klein state is a spin-0 neutral particle, representing a six-dimensional photon polarized along the extra dimensions. Annihilation of this 'spinless photon' proceeds predominantly through Higgs boson exchange, and is largely independent of other Kaluza-Klein particles. The measured relic abundance sets an upper limit on the spinless photon mass of 500 GeV, which decreases to almost 200 GeV if the Higgs boson is light. The phenomenology of this dark matter candidate is strikingly "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.3409","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":"2026-05-18T02:35:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wOQ2vOKpLQ8FaD6dJS41W6Tu09FQfAG0Fl/iknP6hobtIWh97/Meqim4RyCKbxAYh5JynuL6qEUrutuBqgYrAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T06:43:47.199229Z"},"content_sha256":"7bedc8314643f1e3fbee0e63ca8a39469fa1b6d4a6da22adfa4c13bebd66f01a","schema_version":"1.0","event_id":"sha256:7bedc8314643f1e3fbee0e63ca8a39469fa1b6d4a6da22adfa4c13bebd66f01a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HKQTTVNS3UU54PGPGPJSTPWF75/bundle.json","state_url":"https://pith.science/pith/HKQTTVNS3UU54PGPGPJSTPWF75/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HKQTTVNS3UU54PGPGPJSTPWF75/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":"2026-06-09T06:43:47Z","links":{"resolver":"https://pith.science/pith/HKQTTVNS3UU54PGPGPJSTPWF75","bundle":"https://pith.science/pith/HKQTTVNS3UU54PGPGPJSTPWF75/bundle.json","state":"https://pith.science/pith/HKQTTVNS3UU54PGPGPJSTPWF75/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HKQTTVNS3UU54PGPGPJSTPWF75/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:HKQTTVNS3UU54PGPGPJSTPWF75","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":"6ef1e81b2bfc4438013ec03b8942c1f2f110276ccbc8dc80032dd682480aa0b8","cross_cats_sorted":["astro-ph"],"license":"","primary_cat":"hep-ph","submitted_at":"2007-06-25T19:52:46Z","title_canon_sha256":"21c3c2b501d0573bc900e0ed8225d83cac46a4723ea2a72a47417a51b04548c9"},"schema_version":"1.0","source":{"id":"0706.3409","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0706.3409","created_at":"2026-05-18T02:35:30Z"},{"alias_kind":"arxiv_version","alias_value":"0706.3409v2","created_at":"2026-05-18T02:35:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.3409","created_at":"2026-05-18T02:35:30Z"},{"alias_kind":"pith_short_12","alias_value":"HKQTTVNS3UU5","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"HKQTTVNS3UU54PGP","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"HKQTTVNS","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:7bedc8314643f1e3fbee0e63ca8a39469fa1b6d4a6da22adfa4c13bebd66f01a","target":"graph","created_at":"2026-05-18T02:35:30Z","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 explore the properties of dark matter in theories with two universal extra dimensions, where the lightest Kaluza-Klein state is a spin-0 neutral particle, representing a six-dimensional photon polarized along the extra dimensions. Annihilation of this 'spinless photon' proceeds predominantly through Higgs boson exchange, and is largely independent of other Kaluza-Klein particles. The measured relic abundance sets an upper limit on the spinless photon mass of 500 GeV, which decreases to almost 200 GeV if the Higgs boson is light. The phenomenology of this dark matter candidate is strikingly ","authors_text":"Bogdan A. Dobrescu, Dan Hooper, Kyoungchul Kong, Rakhi Mahbubani","cross_cats":["astro-ph"],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"2007-06-25T19:52:46Z","title":"Spinless photon dark matter from two universal extra dimensions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.3409","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:f0799791de933a83534dfde0fc48fe9e4f882657ceb9df09d4cc1536bc89744c","target":"record","created_at":"2026-05-18T02:35:30Z","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":"6ef1e81b2bfc4438013ec03b8942c1f2f110276ccbc8dc80032dd682480aa0b8","cross_cats_sorted":["astro-ph"],"license":"","primary_cat":"hep-ph","submitted_at":"2007-06-25T19:52:46Z","title_canon_sha256":"21c3c2b501d0573bc900e0ed8225d83cac46a4723ea2a72a47417a51b04548c9"},"schema_version":"1.0","source":{"id":"0706.3409","kind":"arxiv","version":2}},"canonical_sha256":"3aa139d5b2dd29de3ccf33d329bec5ff48958a2ee3162182a200d76851df601a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3aa139d5b2dd29de3ccf33d329bec5ff48958a2ee3162182a200d76851df601a","first_computed_at":"2026-05-18T02:35:30.891718Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:35:30.891718Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pIO6Q3KPH6x7k2mrNCYoXtvhU5TIC0nIFZzXuRLRYIeyYOx8IDYesDNJGGBAwSehPM/0NXoZkHkszMMlYe54DA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:35:30.892219Z","signed_message":"canonical_sha256_bytes"},"source_id":"0706.3409","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f0799791de933a83534dfde0fc48fe9e4f882657ceb9df09d4cc1536bc89744c","sha256:7bedc8314643f1e3fbee0e63ca8a39469fa1b6d4a6da22adfa4c13bebd66f01a"],"state_sha256":"eb29a26811cb2f9865e6ac2137dbdabbdb6cbc8e65df72dc23794994d81331ae"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ap3E7khKFGAGtERKpehrLuSW/cy1FEcV0vaIbG2506RdyszK8CEtVGiyLBEoFnbGyKqd65FgbTwqkXQbsJcTCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T06:43:47.203430Z","bundle_sha256":"5ab292be794a00bc375bc3685dae5817e8936c169ef4a8b24d12ce36eb392627"}}