{"paper":{"title":"Theoretical and Observational Bounds on Dynamical Chern-Simons Gravity as an Effective Field Theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Dynamical Chern-Simons gravity corrections must be extremely small on macroscopic scales to satisfy causality and unitarity.","cross_cats":["astro-ph.CO","gr-qc","hep-ph"],"primary_cat":"hep-th","authors_text":"Alexander Cassem, Mark P. Hertzberg","submitted_at":"2026-04-08T17:49:22Z","abstract_excerpt":"Gravitational effective theories are essential for characterizing the space of deviations from General Relativity (GR). Testing these theories against fundamental principles, such as causality and unitarity, can yield constraints on the corresponding parameters. In this paper, we perform such an analysis on the very interesting dynamical Chern-Simons (dCS) gravity. This is a parity violating correction to GR wherein a new scalar field couples to the Pontryagin density $^*R\\,R$. It has generated significant interest, including possible new gravitational wave shapes for LIGO/Virgo and new phenom"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"any dCS corrections to gravitational dynamics should likely be very small on macroscopic systems of observational interest, such as in late-time merging black holes.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The choice of scale in the gravitational species bound and the validity of the specific N-fermion UV completion with (pseudo) Yukawa coupling are sufficient to constrain the effective theory.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Dynamical Chern-Simons gravity is bounded by causality and perturbativity to produce only tiny corrections on macroscopic gravitational systems.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Dynamical Chern-Simons gravity corrections must be extremely small on macroscopic scales to satisfy causality and unitarity.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"146f900a719dc793472657fe460662eb5889cf8dd9da82d372ea19a165e0709d"},"source":{"id":"2604.07332","kind":"arxiv","version":2},"verdict":{"id":"a670b0ff-61ff-40c3-ab2d-1e5fff12711e","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T18:08:26.566083Z","strongest_claim":"any dCS corrections to gravitational dynamics should likely be very small on macroscopic systems of observational interest, such as in late-time merging black holes.","one_line_summary":"Dynamical Chern-Simons gravity is bounded by causality and perturbativity to produce only tiny corrections on macroscopic gravitational systems.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The choice of scale in the gravitational species bound and the validity of the specific N-fermion UV completion with (pseudo) Yukawa coupling are sufficient to constrain the effective theory.","pith_extraction_headline":"Dynamical Chern-Simons gravity corrections must be extremely small on macroscopic scales to satisfy causality and unitarity."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.07332/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":2,"snapshot_sha256":"ca8e5f67070d60679c7c44eb0a7c91280968a8d0bf801cb883f765bb3a348878"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}