{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:PWKFKZB7URYGHXD37X4AMSODZZ","short_pith_number":"pith:PWKFKZB7","canonical_record":{"source":{"id":"1006.2796","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-14T18:45:20Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"10235d72178d53740e690ab441545dd3bb9c95d3720a03ece7122df68e7ec236","abstract_canon_sha256":"bc094910d9320b5759ee3aaafd3cbebb0cb39a18b0c0e3e45cdd55d21fc494c1"},"schema_version":"1.0"},"canonical_sha256":"7d9455643fa47063dc7bfdf80649c3ce76b0f3bf93232b269da046e3e6ce5f76","source":{"kind":"arxiv","id":"1006.2796","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.2796","created_at":"2026-05-18T02:33:16Z"},{"alias_kind":"arxiv_version","alias_value":"1006.2796v1","created_at":"2026-05-18T02:33:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.2796","created_at":"2026-05-18T02:33:16Z"},{"alias_kind":"pith_short_12","alias_value":"PWKFKZB7URYG","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"PWKFKZB7URYGHXD3","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"PWKFKZB7","created_at":"2026-05-18T12:26:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:PWKFKZB7URYGHXD37X4AMSODZZ","target":"record","payload":{"canonical_record":{"source":{"id":"1006.2796","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-14T18:45:20Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"10235d72178d53740e690ab441545dd3bb9c95d3720a03ece7122df68e7ec236","abstract_canon_sha256":"bc094910d9320b5759ee3aaafd3cbebb0cb39a18b0c0e3e45cdd55d21fc494c1"},"schema_version":"1.0"},"canonical_sha256":"7d9455643fa47063dc7bfdf80649c3ce76b0f3bf93232b269da046e3e6ce5f76","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:33:16.998258Z","signature_b64":"O1i7MxXN+9nvBjLRt7rVUtt6PHG5a/QrAPBG0weEGxeQI9Ashr0xF5mjn2IftUeHJIdsxSTrT/xg5qJWeQGeCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7d9455643fa47063dc7bfdf80649c3ce76b0f3bf93232b269da046e3e6ce5f76","last_reissued_at":"2026-05-18T02:33:16.997661Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:33:16.997661Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1006.2796","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":"2026-05-18T02:33:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LXNuasY6ARnO6k8YY3sPlBfv3C8MpNiVr6sH8iIfoAmerKPVID/BlTo7vKGeGZyIoogrKPDEZXJ11Zt2fKdGBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T00:42:34.166971Z"},"content_sha256":"bd277074d0e33e55e53b6d028457da22455cb3cc90de5e1c07d5ad04f43e31f5","schema_version":"1.0","event_id":"sha256:bd277074d0e33e55e53b6d028457da22455cb3cc90de5e1c07d5ad04f43e31f5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:PWKFKZB7URYGHXD37X4AMSODZZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Chameleons with Field Dependent Couplings","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Carsten van de Bruck, David F. Mota, Hans A. Winther, Nelson J. Nunes, Philippe Brax","submitted_at":"2010-06-14T18:45:20Z","abstract_excerpt":"Certain scalar-tensor theories exhibit the so-called chameleon mechanism, whereby observational signatures of scalar fields are hidden by a combination of self-interactions and interactions with ambient matter. Not all scalar-tensor theories exhibit such a chameleon mechanism, which has been originally found in models with inverse power run-away potentials and field independent couplings to matter. In this paper we investigate field-theories with field-dependent couplings and a power-law potential for the scalar field. We show that the theory indeed is a chameleon field theory. We find the thi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.2796","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":""},"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":"2026-05-18T02:33:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"psBnNYlUOSB4ufbDeWpXmiPLO1YZLe386qg8WFQ7ve0aRTmq6aBZyQmw8CIkh2aSReFuJMJarlnwQBfopAIPCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T00:42:34.167662Z"},"content_sha256":"6823731525c7452853bd33bd61f48b9062aa6ca70c5b425c090018c16878d3bc","schema_version":"1.0","event_id":"sha256:6823731525c7452853bd33bd61f48b9062aa6ca70c5b425c090018c16878d3bc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PWKFKZB7URYGHXD37X4AMSODZZ/bundle.json","state_url":"https://pith.science/pith/PWKFKZB7URYGHXD37X4AMSODZZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PWKFKZB7URYGHXD37X4AMSODZZ/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":"2026-05-26T00:42:34Z","links":{"resolver":"https://pith.science/pith/PWKFKZB7URYGHXD37X4AMSODZZ","bundle":"https://pith.science/pith/PWKFKZB7URYGHXD37X4AMSODZZ/bundle.json","state":"https://pith.science/pith/PWKFKZB7URYGHXD37X4AMSODZZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PWKFKZB7URYGHXD37X4AMSODZZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:PWKFKZB7URYGHXD37X4AMSODZZ","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":"bc094910d9320b5759ee3aaafd3cbebb0cb39a18b0c0e3e45cdd55d21fc494c1","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-14T18:45:20Z","title_canon_sha256":"10235d72178d53740e690ab441545dd3bb9c95d3720a03ece7122df68e7ec236"},"schema_version":"1.0","source":{"id":"1006.2796","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.2796","created_at":"2026-05-18T02:33:16Z"},{"alias_kind":"arxiv_version","alias_value":"1006.2796v1","created_at":"2026-05-18T02:33:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.2796","created_at":"2026-05-18T02:33:16Z"},{"alias_kind":"pith_short_12","alias_value":"PWKFKZB7URYG","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"PWKFKZB7URYGHXD3","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"PWKFKZB7","created_at":"2026-05-18T12:26:12Z"}],"graph_snapshots":[{"event_id":"sha256:6823731525c7452853bd33bd61f48b9062aa6ca70c5b425c090018c16878d3bc","target":"graph","created_at":"2026-05-18T02:33:16Z","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":"Certain scalar-tensor theories exhibit the so-called chameleon mechanism, whereby observational signatures of scalar fields are hidden by a combination of self-interactions and interactions with ambient matter. Not all scalar-tensor theories exhibit such a chameleon mechanism, which has been originally found in models with inverse power run-away potentials and field independent couplings to matter. In this paper we investigate field-theories with field-dependent couplings and a power-law potential for the scalar field. We show that the theory indeed is a chameleon field theory. We find the thi","authors_text":"Carsten van de Bruck, David F. Mota, Hans A. Winther, Nelson J. Nunes, Philippe Brax","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-14T18:45:20Z","title":"Chameleons with Field Dependent Couplings"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.2796","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:bd277074d0e33e55e53b6d028457da22455cb3cc90de5e1c07d5ad04f43e31f5","target":"record","created_at":"2026-05-18T02:33:16Z","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":"bc094910d9320b5759ee3aaafd3cbebb0cb39a18b0c0e3e45cdd55d21fc494c1","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-14T18:45:20Z","title_canon_sha256":"10235d72178d53740e690ab441545dd3bb9c95d3720a03ece7122df68e7ec236"},"schema_version":"1.0","source":{"id":"1006.2796","kind":"arxiv","version":1}},"canonical_sha256":"7d9455643fa47063dc7bfdf80649c3ce76b0f3bf93232b269da046e3e6ce5f76","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7d9455643fa47063dc7bfdf80649c3ce76b0f3bf93232b269da046e3e6ce5f76","first_computed_at":"2026-05-18T02:33:16.997661Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:33:16.997661Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"O1i7MxXN+9nvBjLRt7rVUtt6PHG5a/QrAPBG0weEGxeQI9Ashr0xF5mjn2IftUeHJIdsxSTrT/xg5qJWeQGeCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:33:16.998258Z","signed_message":"canonical_sha256_bytes"},"source_id":"1006.2796","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bd277074d0e33e55e53b6d028457da22455cb3cc90de5e1c07d5ad04f43e31f5","sha256:6823731525c7452853bd33bd61f48b9062aa6ca70c5b425c090018c16878d3bc"],"state_sha256":"8ce4b7a8158e432e03101a18244a6d3cab427c635457204fc565b5bd1c77d883"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RITLW/Efe31JLx1Nw6k4g5ssJtVf3b388exwSkZ9Mcj5PfntSF/maONs0N9uz8XlKXvxpVmJgVXdt4Caw9A8BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T00:42:34.171164Z","bundle_sha256":"5e23a95bc079f2abe2b960c3bd5d20b80c61b87255e9abf9f6814060dccc0f5e"}}