${{\mathit K}_S^0}$ $\rightarrow$ invisible  Decay Mode Summary INSPIRE   JSON PDGID:
S012.17
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{16}$ ${{\mathit K}_S^0}$ $\rightarrow$ invisible $<8.4 \times 10^{-4}$ CL= 90%
Category: $\mathit CP$ violating ($\mathit CP$) and $\Delta \mathit S$ = 1 weak neutral current ($\mathit S1$) modes
The following data is related to the above decay:
$\Gamma({{\mathit K}_S^0}$ $\rightarrow$ invisible$)/\Gamma_{\text{total}}$
$\Gamma_{16}/\Gamma$