Discovering True Muonium in $K_L\to ({\mu }^{+}{\mu }^{-})\gamma$

Abstract

Theoretical and phenomenological predictions of $\mathcal{B}\mathcal{R}(K_L\to ({\mu }^{+}{\mu }^{-})\gamma )\sim 7\times 10^{-13}$ are presented for different model form factors $F_{K_L\gamma {\gamma }^{\ast }}(Q^2)$. These rates are comparable to existing and near-term rare $K_L$ decay searches at J-PARC and CERN, indicating a discovery of true muonium is possible. The model uncertainties are sufficiently small that detection of true muonium could discriminate between the form factor models. Further discussion of potential backgrounds is made.

4 pages, 1 figure

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Cited by in corpus (6)

• True muonium resonant production at $e^{+}{e}^{-}$ colliders with standard crossing angle
• Scouring meson decays for true muonium
• Feasibility study of True Muonium discovery with CERN-SPS H4 positron beam
• Production of true para-muonium in linearly polarized photon fusions
• Alternative implementation of atomic form factors
• Production of leptonium in heavy quarkonium decays