{"paper":{"title":"The spin density matrix of top quark pairs produced in electron-positron annihilation including QCD radiative corrections","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A. Brandenburg, M. Flesch, P. Uwer","submitted_at":"1998-06-08T15:17:36Z","abstract_excerpt":"We calculate the spin density matrix of top quark pairs for the reaction $e^+e^-\\to t\\bar{t}X$ to order $\\alpha_s$. As an application we show next-to-leading order results for a variety of spin observables for the $t\\bar{t}$ system. These include the top quark and antiquark polarizations and $t\\bar{t}$ spin-spin correlations as a function of the center-of-mass energy and of the top quark scattering angle for arbitrary longitudinal polarization of the electron/positron beam."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9806306","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"}