{"paper":{"title":"Jet Momentum Broadening in Viscous QCD Matter: A Moment Expansion Approach","license":"http://creativecommons.org/licenses/by/4.0/","headline":"The leading near-equilibrium contribution to the jet broadening tensor is controlled by the medium shear-stress tensor in the 14-moment approximation.","cross_cats":["hep-th","nucl-th"],"primary_cat":"hep-ph","authors_text":"Isabella Danhoni, Jorge Noronha, Nicki Mullins","submitted_at":"2026-05-12T22:09:38Z","abstract_excerpt":"We formulate out-of-equilibrium jet momentum broadening in QCD effective kinetic theory through a moment expansion of the medium distribution function, a method traditionally used to derive relativistic viscous hydrodynamics from kinetic theory. We explicitly compute the leading near-equilibrium contribution to the spatial jet broadening tensor $\\hat q^{ij}$ within the 14-moment approximation, and show that it is controlled by the medium shear-stress tensor. This provides a direct map from QCD effective kinetic theory to event-by-event viscous hydrodynamic simulations, converting local shear-s"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"We explicitly compute the leading near-equilibrium contribution to the spatial jet broadening tensor qhat^ij within the 14-moment approximation, and show that it is controlled by the medium shear-stress tensor.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The 14-moment truncation of the distribution function is sufficient to capture the leading viscous correction to jet broadening in QCD effective kinetic theory near equilibrium.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"The jet broadening tensor qhat^ij in near-equilibrium QCD is controlled by the medium shear-stress tensor within the 14-moment approximation.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"The leading near-equilibrium contribution to the jet broadening tensor is controlled by the medium shear-stress tensor in the 14-moment approximation.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"45ddb435965e3e127374996107158b09f392938f9e0c4632a982c896820cf36f"},"source":{"id":"2605.12791","kind":"arxiv","version":1},"verdict":{"id":"daa2d9d7-5768-4002-8853-515ebda6dfd3","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-14T19:55:30.427878Z","strongest_claim":"We explicitly compute the leading near-equilibrium contribution to the spatial jet broadening tensor qhat^ij within the 14-moment approximation, and show that it is controlled by the medium shear-stress tensor.","one_line_summary":"The jet broadening tensor qhat^ij in near-equilibrium QCD is controlled by the medium shear-stress tensor within the 14-moment approximation.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The 14-moment truncation of the distribution function is sufficient to capture the leading viscous correction to jet broadening in QCD effective kinetic theory near equilibrium.","pith_extraction_headline":"The leading near-equilibrium contribution to the jet broadening tensor is controlled by the medium shear-stress tensor in the 14-moment approximation."},"references":{"count":73,"sample":[{"doi":"","year":2018,"title":"Jet measurements in heavy ion physics","work_id":"c830872e-245f-4d3e-bfb7-5033b4a4cf81","ref_index":1,"cited_arxiv_id":"1705.01974","is_internal_anchor":true},{"doi":"","year":1990,"title":"M. Gyulassy and M. Plumer, Jet Quenching in Dense Matter, Phys. Lett. B243, 432 (1990)","work_id":"aecbe0b2-416a-4110-af73-be726a008b2b","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2000,"title":"Energy loss in perturbative QCD","work_id":"4000a91e-d313-484f-a291-5fae3357065b","ref_index":3,"cited_arxiv_id":"hep-ph/0002198","is_internal_anchor":true},{"doi":"","year":2004,"title":"Jet Quenching and Radiative Energy Loss in Dense Nuclear Matter","work_id":"a9faffba-ae8f-443f-93d2-2a87e27c8976","ref_index":4,"cited_arxiv_id":"nucl-th/0302077","is_internal_anchor":true},{"doi":"","year":2015,"title":"Jet quenching in high-energy heavy-ion collisions","work_id":"4c57560e-a3a6-4638-a2ce-00ca2f908de2","ref_index":5,"cited_arxiv_id":"1511.00790","is_internal_anchor":true}],"resolved_work":73,"snapshot_sha256":"37851b67d029f4e2add5353cdf2bd6e6adc3b7b332e62fc7cd0e0cdefb0e816c","internal_anchors":42},"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"}