{"paper":{"title":"Scouring meson decays for true muonium","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Henry Lamm, Yao Ji","submitted_at":"2018-09-29T17:01:16Z","abstract_excerpt":"Rare meson decay experiments promise to measure branching ratios as small as $10^{-13}$. This presents an opportunity to discover the $\\mu^+\\mu^-$ bound state true muonium. We consider a set of possible channels, all with branching ratios above $\\sim10^{-11}$. For the electromagnetic decays $\\eta/\\eta'\\rightarrow(\\mu^+\\mu^-)\\gamma$, theoretical and phenomenological form factors $F_{\\eta/\\eta'\\gamma\\gamma^*}(Q^2)$ allow predictions of $\\mathcal{BR}(\\eta'\\rightarrow (\\mu^+\\mu^-) \\gamma)\\sim 4.8\\times10^{-10}$ and $\\mathcal{BR}(\\eta'\\rightarrow (\\mu^+\\mu^-) \\gamma)\\sim 3.7\\times10^{-11}$ at the 5"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.00233","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"}