$\Delta \mathit C$ = 2 VIA MIXING
Allowed in second-order weak interactions, e.g. mixing.
$\vert{}{\mathit m}_{{{\mathit D}_{{{1}}}^{0}}}–{\mathit m}_{{{\mathit D}_{{{2}}}^{0}}}\vert{}$ = $x\Gamma $ ($99.7$ $\pm11.6$) $ \times 10^{8}$ $\hbar{}$ s${}^{-1}$
($\Gamma _{{{\mathit D}_{{{1}}}^{0}}}$ $-$ $\Gamma _{{{\mathit D}_{{{2}}}^{0}}})/\Gamma $ = 2$\mathit y$ ($1.394$ $\pm0.056$) $ \times 10^{-2}$