{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:ME2ZARRROLARBOZGUAKUWFG4LS","short_pith_number":"pith:ME2ZARRR","canonical_record":{"source":{"id":"1212.0585","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-12-03T23:22:50Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"e283923a31af51587625f79c66adf97d3bb2a853e638d9022ba48b9e2b1a0c18","abstract_canon_sha256":"d38bdc1f5135d926582a2dc34d64e553216e9369f168158c91ec5cbbff2073a7"},"schema_version":"1.0"},"canonical_sha256":"613590463172c110bb26a0154b14dc5c9abfc032328e2f8394f182b225c640f0","source":{"kind":"arxiv","id":"1212.0585","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.0585","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"arxiv_version","alias_value":"1212.0585v2","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.0585","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"pith_short_12","alias_value":"ME2ZARRROLAR","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"ME2ZARRROLARBOZG","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"ME2ZARRR","created_at":"2026-05-18T12:27:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:ME2ZARRROLARBOZGUAKUWFG4LS","target":"record","payload":{"canonical_record":{"source":{"id":"1212.0585","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-12-03T23:22:50Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"e283923a31af51587625f79c66adf97d3bb2a853e638d9022ba48b9e2b1a0c18","abstract_canon_sha256":"d38bdc1f5135d926582a2dc34d64e553216e9369f168158c91ec5cbbff2073a7"},"schema_version":"1.0"},"canonical_sha256":"613590463172c110bb26a0154b14dc5c9abfc032328e2f8394f182b225c640f0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:52:48.107387Z","signature_b64":"q9ru4xy9505cTG5OIpVEDTeUzf8YdTIgHn0cOMdIw7NloGiEglEV2kpN62i1x21y50Zgx6fCkQ5pUxQQ11UODQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"613590463172c110bb26a0154b14dc5c9abfc032328e2f8394f182b225c640f0","last_reissued_at":"2026-05-18T01:52:48.106912Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:52:48.106912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1212.0585","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":"2026-05-18T01:52:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JCLy/RDvkNy69JzoaGMm5c6bkbc5a/vPTrVak5j3EhxmoM3Sx2nOWZ5EzYFudTnfy/l0MREcq+Zr8vpktIVdDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T10:10:25.998502Z"},"content_sha256":"db939c1415185aacb175e9f1947530bbde644af926fb2d8e9edddf8e76b844d9","schema_version":"1.0","event_id":"sha256:db939c1415185aacb175e9f1947530bbde644af926fb2d8e9edddf8e76b844d9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:ME2ZARRROLARBOZGUAKUWFG4LS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmology with a spin","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Joao Magueijo, T.G. Zlosnik, T.W.B. Kibble","submitted_at":"2012-12-03T23:22:50Z","abstract_excerpt":"Using the chiral representation for spinors we present a particularly transparent way to generate the most general spinor dynamics in a theory where gravity is ruled by the Einstein-Cartan-Holst action. In such theories torsion need not vanish, but it can be re-interpreted as a 4-fermion self-interaction within a torsion-free theory. The self-interaction may or may not break parity invariance, and may contribute positively or negatively to the energy density, depending on the couplings considered. We then examine cosmological models ruled by a spinorial field within this theory. We find that w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.0585","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":"2026-05-18T01:52:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PT94dy9S8n8n162mIQ5hSA/hxGoXlEB7sihhcsCoqTsWeV4KakPw8IQOhJEMd5MUXM/HEiqe/xhJvyOU/PuXCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T10:10:25.999504Z"},"content_sha256":"4737c6c9128e3545bffd900068a135c94676d4a52c4de55acf842ba26c8167fd","schema_version":"1.0","event_id":"sha256:4737c6c9128e3545bffd900068a135c94676d4a52c4de55acf842ba26c8167fd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ME2ZARRROLARBOZGUAKUWFG4LS/bundle.json","state_url":"https://pith.science/pith/ME2ZARRROLARBOZGUAKUWFG4LS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ME2ZARRROLARBOZGUAKUWFG4LS/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":"2026-08-07T10:10:26Z","links":{"resolver":"https://pith.science/pith/ME2ZARRROLARBOZGUAKUWFG4LS","bundle":"https://pith.science/pith/ME2ZARRROLARBOZGUAKUWFG4LS/bundle.json","state":"https://pith.science/pith/ME2ZARRROLARBOZGUAKUWFG4LS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ME2ZARRROLARBOZGUAKUWFG4LS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:ME2ZARRROLARBOZGUAKUWFG4LS","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":"d38bdc1f5135d926582a2dc34d64e553216e9369f168158c91ec5cbbff2073a7","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-12-03T23:22:50Z","title_canon_sha256":"e283923a31af51587625f79c66adf97d3bb2a853e638d9022ba48b9e2b1a0c18"},"schema_version":"1.0","source":{"id":"1212.0585","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.0585","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"arxiv_version","alias_value":"1212.0585v2","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.0585","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"pith_short_12","alias_value":"ME2ZARRROLAR","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"ME2ZARRROLARBOZG","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"ME2ZARRR","created_at":"2026-05-18T12:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:4737c6c9128e3545bffd900068a135c94676d4a52c4de55acf842ba26c8167fd","target":"graph","created_at":"2026-05-18T01:52:48Z","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":"Using the chiral representation for spinors we present a particularly transparent way to generate the most general spinor dynamics in a theory where gravity is ruled by the Einstein-Cartan-Holst action. In such theories torsion need not vanish, but it can be re-interpreted as a 4-fermion self-interaction within a torsion-free theory. The self-interaction may or may not break parity invariance, and may contribute positively or negatively to the energy density, depending on the couplings considered. We then examine cosmological models ruled by a spinorial field within this theory. We find that w","authors_text":"Joao Magueijo, T.G. Zlosnik, T.W.B. Kibble","cross_cats":["gr-qc","hep-ph","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-12-03T23:22:50Z","title":"Cosmology with a spin"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.0585","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:db939c1415185aacb175e9f1947530bbde644af926fb2d8e9edddf8e76b844d9","target":"record","created_at":"2026-05-18T01:52:48Z","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":"d38bdc1f5135d926582a2dc34d64e553216e9369f168158c91ec5cbbff2073a7","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-12-03T23:22:50Z","title_canon_sha256":"e283923a31af51587625f79c66adf97d3bb2a853e638d9022ba48b9e2b1a0c18"},"schema_version":"1.0","source":{"id":"1212.0585","kind":"arxiv","version":2}},"canonical_sha256":"613590463172c110bb26a0154b14dc5c9abfc032328e2f8394f182b225c640f0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"613590463172c110bb26a0154b14dc5c9abfc032328e2f8394f182b225c640f0","first_computed_at":"2026-05-18T01:52:48.106912Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:48.106912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q9ru4xy9505cTG5OIpVEDTeUzf8YdTIgHn0cOMdIw7NloGiEglEV2kpN62i1x21y50Zgx6fCkQ5pUxQQ11UODQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:48.107387Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.0585","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:db939c1415185aacb175e9f1947530bbde644af926fb2d8e9edddf8e76b844d9","sha256:4737c6c9128e3545bffd900068a135c94676d4a52c4de55acf842ba26c8167fd"],"state_sha256":"d62da14bed5bc1962a131b00b6e1f3f291ffd4c493a4c30924d4c5aff29b0a41"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eyqbP6zNn1W7FZK/EhB7VoFe7U1+2h4KCLS8RUPGPJziJZKLUBipx2vEUVSgfzS9BZZOdbSQy3vVawTlLhjrAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T10:10:26.006125Z","bundle_sha256":"642ce1537dc4522f7a30bf2660b2fa1810c6d81c7cf217d8c2bb6b00c01dc7f2"}}