{"paper":{"title":"Recent results from NA48/2 and NA62 experiments at CERN","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"Nicolas Lurkin","submitted_at":"2017-01-24T16:59:56Z","abstract_excerpt":"The NA48/2 and $\\text{NA62}\\text{-}{\\text{R}_\\text{K}}$ experiments at the CERN SPS collected a large sample of charged kaon decays in flight. $\\text{NA62}\\text{-}{\\text{R}_\\text{K}}$ was running in 2007-08 with a highly efficient minimum bias trigger for decays into electrons. A preliminary measurement of the electromagnetic transition form factor slope of the $\\pi^0$ from $1.05\\times 10^{6}$ fully reconstructed $\\pi^0$ Dalitz decays is presented. The obtained value $a = (3.70 \\pm 0.53_\\text{stat} \\pm 0.36_\\text{syst})\\times 10^{-2}$ represents a $5.8\\sigma$ observation of a non-zero slope in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.06979","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"}