${{\boldsymbol \pi}^{0}}$ $\rightarrow$ 2 ${{\boldsymbol \gamma}}$ INSPIRE search

$\Gamma($ ${{\mathit \pi}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}$ positronium$)/\Gamma($ ${{\mathit \pi}^{0}}$ $\rightarrow$ 2 ${{\mathit \gamma}}$ $)$
$\Gamma_{3}/\Gamma_{1}$
S009R12
$\Gamma($ ${{\mathit \pi}^{0}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit e}^{-}}$ $)/\Gamma($ ${{\mathit \pi}^{0}}$ $\rightarrow$ 2 ${{\mathit \gamma}}$ $)$
$\Gamma_{4}/\Gamma_{1}$
S009R3
$\Gamma($ ${{\mathit \pi}^{0}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $)/\Gamma($ ${{\mathit \pi}^{0}}$ $\rightarrow$ 2 ${{\mathit \gamma}}$ $)$
$\Gamma_{5}/\Gamma_{1}$
S009R5
3.0$\Gamma($ ${{\mathit \pi}^{0}}$ $\rightarrow$ 2 ${{\mathit \gamma}}$ $)/\Gamma_{\text{total}}{\times }\Gamma($ ${{\mathit \pi}^{0}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$ $)/\Gamma_{\text{total}}$
3.0$\Gamma_{1}/\Gamma{\times }\Gamma_{2}/\Gamma$
S009K3P
$\Gamma($ ${{\mathit \pi}^{0}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$ $)/\Gamma($ ${{\mathit \pi}^{0}}$ $\rightarrow$ 2 ${{\mathit \gamma}}$ $)$
$\Gamma_{2}/\Gamma_{1}$
S009R1