Table 2.

Reduced ${\mathit{\chi }}^2$ and ${\tilde{\mathit{\chi }}}^2$ for the comparison of our result to the $e^{+}{e}^{-}\to {\mathit{\pi }}^0\mathit{\gamma }$ data of SND [85, 86] and CMD2 [87] as well as the combined data set. In each case, the upper line refers to the fit with $\mathit{\omega }$ and $\mathit{\varphi }$ only, the lower line to the fit including ${\mathit{\omega }}^{\prime }$, ${\mathit{\omega }}^{\prime \prime }$. ${\mathit{\chi }}^2$ and ${\tilde{\mathit{\chi }}}^2$ are calculated for all data points below $1.1\text{GeV}$ (upper line) and $1.4\text{GeV}$ (lower line), respectively

	SND	CMD2	SND+CMD2
${\mathit{\chi }}^2/\text{dof}$	$1.74$	$4.50$	$3.12$
	$1.05$	$2.37$	$1.71$
${\tilde{\mathit{\chi }}}^2/\text{dof}$	$0.71$	$1.42$	$1.06$
	$0.56$	$1.02$	$0.79$