{"paper":{"title":"Search for the Flavor-Changing Neutral-Current Decays $D^+\\to \\pi^+ \\mu^+ \\mu^-$ and $D^+\\to \\pi^+ e^+ e^-$","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"Fermilab E791 Collaboration","submitted_at":"1995-07-10T19:32:12Z","abstract_excerpt":"We report the results of a search for the flavor-changing neutral-current decays $D^+\\rightarrow \\pi^+ \\mu^+ \\mu^-$ and $D^+\\rightarrow \\pi^+ e^+ e^-$ in data from Fermilab charm hadroproduction experiment E791. No signal above background is found, and we obtain upper limits on branching fractions, $B(D^+\\rightarrow \\pi^+ \\mu^+ \\mu^-) < 1.8 \\times 10^{-5}$ and $B(D^+\\rightarrow \\pi^+ e^+ e^-) < 6.6 \\times 10^{-5}$, at the 90\\% confidence level."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/9507003","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"}