{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:Y2KHXW772YQXRUFXSDC6GUCPPI","short_pith_number":"pith:Y2KHXW77","canonical_record":{"source":{"id":"1407.0389","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-07-01T20:00:05Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"03e9f0baffd2ece1f14ec0ac61c513bc4a9a05970b1b03ee1c57be07f9ed1620","abstract_canon_sha256":"b9423d3f627f32dd43faeaa85472cf963dfb5a6443c3c6798cbe753f8c7cd311"},"schema_version":"1.0"},"canonical_sha256":"c6947bdbffd62178d0b790c5e3504f7a0737aa33f9c69c2484177d55172e4875","source":{"kind":"arxiv","id":"1407.0389","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.0389","created_at":"2026-05-18T01:42:42Z"},{"alias_kind":"arxiv_version","alias_value":"1407.0389v3","created_at":"2026-05-18T01:42:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.0389","created_at":"2026-05-18T01:42:42Z"},{"alias_kind":"pith_short_12","alias_value":"Y2KHXW772YQX","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"Y2KHXW772YQXRUFX","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"Y2KHXW77","created_at":"2026-05-18T12:28:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:Y2KHXW772YQXRUFXSDC6GUCPPI","target":"record","payload":{"canonical_record":{"source":{"id":"1407.0389","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-07-01T20:00:05Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"03e9f0baffd2ece1f14ec0ac61c513bc4a9a05970b1b03ee1c57be07f9ed1620","abstract_canon_sha256":"b9423d3f627f32dd43faeaa85472cf963dfb5a6443c3c6798cbe753f8c7cd311"},"schema_version":"1.0"},"canonical_sha256":"c6947bdbffd62178d0b790c5e3504f7a0737aa33f9c69c2484177d55172e4875","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:42.895606Z","signature_b64":"dG57TZjPwkgdjMMg2oRQaTvaeP++QAW12BgTemdbo7/g7jWDO05HhVfXFMNIfZyyeOdNHM//b5sFOVp+gsqrBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c6947bdbffd62178d0b790c5e3504f7a0737aa33f9c69c2484177d55172e4875","last_reissued_at":"2026-05-18T01:42:42.895161Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:42.895161Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.0389","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:42:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xiXbOJfFeWvsK5We1FiGc0bjJywARPxohrFANipseYWn5quC/LrgyihVqiKvtpqi6NSJWjB3IApspiNoUlfNDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T15:10:37.403789Z"},"content_sha256":"57173a2f83726e4fdd2821e9fa49fb81405d6f667b4fd4658ea71953b186f087","schema_version":"1.0","event_id":"sha256:57173a2f83726e4fdd2821e9fa49fb81405d6f667b4fd4658ea71953b186f087"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:Y2KHXW772YQXRUFXSDC6GUCPPI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A new mechanism for dark energy: the adaptive screening","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Andi Hektor, Hardi Veerm\\\"ae, Luca Marzola, Martti Raidal","submitted_at":"2014-07-01T20:00:05Z","abstract_excerpt":"We describe how known matter effects within a well-motivated particle physics framework can explain the dark energy component of the Universe. By considering a cold gas of particles which interact via a vector mediator, we show that there exists a regime where the gas reproduces the dynamics of dark energy. In this regime the screening mass of the mediator is proportional to the number density of the gas, hence we refer to this phenomenon as \"the adaptive screening mechanism\". As an example, we argue that such screening mass can result from strong localization of the vector mediators. The prop"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.0389","kind":"arxiv","version":3},"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":"2026-05-18T01:42:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7CGcd0f9wJb7dqxYuGUwkJC0Teef0Ilm7VS6dTou/J+LFEeJiA0fJ2q9ULiOg3GWfQlA5R9S97836r8vhaK8Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T15:10:37.404141Z"},"content_sha256":"795e2f71d1914146f99fac1d12b963942cd30b117038d218e007b7ba1527f566","schema_version":"1.0","event_id":"sha256:795e2f71d1914146f99fac1d12b963942cd30b117038d218e007b7ba1527f566"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y2KHXW772YQXRUFXSDC6GUCPPI/bundle.json","state_url":"https://pith.science/pith/Y2KHXW772YQXRUFXSDC6GUCPPI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y2KHXW772YQXRUFXSDC6GUCPPI/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":"2026-06-03T15:10:37Z","links":{"resolver":"https://pith.science/pith/Y2KHXW772YQXRUFXSDC6GUCPPI","bundle":"https://pith.science/pith/Y2KHXW772YQXRUFXSDC6GUCPPI/bundle.json","state":"https://pith.science/pith/Y2KHXW772YQXRUFXSDC6GUCPPI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y2KHXW772YQXRUFXSDC6GUCPPI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:Y2KHXW772YQXRUFXSDC6GUCPPI","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":"b9423d3f627f32dd43faeaa85472cf963dfb5a6443c3c6798cbe753f8c7cd311","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-07-01T20:00:05Z","title_canon_sha256":"03e9f0baffd2ece1f14ec0ac61c513bc4a9a05970b1b03ee1c57be07f9ed1620"},"schema_version":"1.0","source":{"id":"1407.0389","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.0389","created_at":"2026-05-18T01:42:42Z"},{"alias_kind":"arxiv_version","alias_value":"1407.0389v3","created_at":"2026-05-18T01:42:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.0389","created_at":"2026-05-18T01:42:42Z"},{"alias_kind":"pith_short_12","alias_value":"Y2KHXW772YQX","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"Y2KHXW772YQXRUFX","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"Y2KHXW77","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:795e2f71d1914146f99fac1d12b963942cd30b117038d218e007b7ba1527f566","target":"graph","created_at":"2026-05-18T01:42:42Z","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 describe how known matter effects within a well-motivated particle physics framework can explain the dark energy component of the Universe. By considering a cold gas of particles which interact via a vector mediator, we show that there exists a regime where the gas reproduces the dynamics of dark energy. In this regime the screening mass of the mediator is proportional to the number density of the gas, hence we refer to this phenomenon as \"the adaptive screening mechanism\". As an example, we argue that such screening mass can result from strong localization of the vector mediators. The prop","authors_text":"Andi Hektor, Hardi Veerm\\\"ae, Luca Marzola, Martti Raidal","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-07-01T20:00:05Z","title":"A new mechanism for dark energy: the adaptive screening"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.0389","kind":"arxiv","version":3},"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":"sha256:57173a2f83726e4fdd2821e9fa49fb81405d6f667b4fd4658ea71953b186f087","target":"record","created_at":"2026-05-18T01:42:42Z","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":"b9423d3f627f32dd43faeaa85472cf963dfb5a6443c3c6798cbe753f8c7cd311","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2014-07-01T20:00:05Z","title_canon_sha256":"03e9f0baffd2ece1f14ec0ac61c513bc4a9a05970b1b03ee1c57be07f9ed1620"},"schema_version":"1.0","source":{"id":"1407.0389","kind":"arxiv","version":3}},"canonical_sha256":"c6947bdbffd62178d0b790c5e3504f7a0737aa33f9c69c2484177d55172e4875","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6947bdbffd62178d0b790c5e3504f7a0737aa33f9c69c2484177d55172e4875","first_computed_at":"2026-05-18T01:42:42.895161Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:42.895161Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dG57TZjPwkgdjMMg2oRQaTvaeP++QAW12BgTemdbo7/g7jWDO05HhVfXFMNIfZyyeOdNHM//b5sFOVp+gsqrBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:42.895606Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.0389","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:57173a2f83726e4fdd2821e9fa49fb81405d6f667b4fd4658ea71953b186f087","sha256:795e2f71d1914146f99fac1d12b963942cd30b117038d218e007b7ba1527f566"],"state_sha256":"7d6c386389fb0c73b6dcc0507f286993f04f16b3ff419ec81525b4283fa09179"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v+f6RoiWEaXSELbc2tDu1Ct1amgE6u+dnytpYif8qDOTy1FPNsnB2zjidLlCqb+oKB6wqzUy5VX7dq53FFl1AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T15:10:37.406202Z","bundle_sha256":"7b37ee5485b4edc2fe3897cd0114427e32ff0c54b9d70f118317250e42c4f47f"}}