{"paper":{"title":"Interpretation of Angular Distributions of $Z$-boson Production at Colliders","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","nucl-ex"],"primary_cat":"hep-ph","authors_text":"Jen-Chieh Peng, Oleg Teryaev, Randall Evan McClellan, Wen-Chen Chang","submitted_at":"2015-11-28T21:25:59Z","abstract_excerpt":"High precision data of dilepton angular distributions in $\\gamma^*/Z$ production were reported recently by the CMS Collaboration covering a broad range of the dilepton transverse momentum, $q_T$, up to $\\sim 300$ GeV. Pronounced $q_T$ dependencies of the $\\lambda$ and $\\nu$ parameters, characterizing the $\\cos^2\\theta$ and $\\cos 2\\phi$ angular distributions, were found. Violation of the Lam-Tung relation was also clearly observed. We show that the $q_T$ dependence of $\\lambda$ allows a determination of the relative contributions of the $q \\bar q$ annihilation versus the $qG$ Compton process. T"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.08932","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"}