Radiative corrections to double Dalitz decays: Effects on invariant mass distributions and angular correlations

We review the theory of meson decays to two lepton pairs, including the cases of identical as well as nonidentical leptons, as well as CP-conserving and CP-violating couplings. A complete lowest-order calculation of QED radiative corrections to these decays is discussed, and comparisons of predicted rates and kinematic distributions between tree-level and one-loop-corrected calculations are presented for both ${\ensuremath{\pi}}^{0}$ and ${K}^{0}$ decays.

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