{"paper":{"title":"Measurement of the $t\\bar{t}W$ and $t\\bar{t}Z$ production cross sections in $pp$ collisions at $\\sqrt{s} = 8 \\mathrm{\\ Te\\kern -0.1em V}$ with the ATLAS detector","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"ATLAS Collaboration","submitted_at":"2015-09-17T14:56:01Z","abstract_excerpt":"The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from $pp$ collisions at $\\sqrt{s} = 8 \\mathrm{\\ Te\\kern -0.1em V}$. The dataset corresponds to an integrated luminosity of $20.3\\ \\mathrm{fb}^{-1}$ collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the $t\\bar{t}W$ and $t\\bar{t}Z$ processes simultaneously yields a significance of $5.0\\sigma$ ($4.2\\sigma$) over the background-only hypothesis for $t\\bar{t}W$ ($t\\bar{t}Z$) production. Th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.05276","kind":"arxiv","version":2},"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"}