Rare meson decay experiments promise to measure branching ratios as small as 10−13. This presents an opportunity to discover the μ+μ− bound state true muonium. We consider a set of possible channels, all with branching ratios above ∼10−11. For the electromagnetic decays η/η′→(μ+μ−)γ, theoretical and phenomenological form factors Fη/η′γγ∗(Q2) allow predictions of BR(η′→(μ+μ−)γ)∼4.8×10−10 and BR(η′→(μ+μ−)γ)∼3.7×10−11 at the 5% level. Discussion of experimental prospects and potential backgrounds are made.
@article{arxiv.1810.00233,
title = {Scouring meson decays for true muonium},
author = {Yao Ji and Henry Lamm},
journal= {arXiv preprint arXiv:1810.00233},
year = {2019}
}