${{\mathit \eta}}$ $\rightarrow$ invisible  Decay Mode Summary INSPIRE   JSON  (beta) PDGID:
S014.107
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{7}$ ${{\mathit \eta}}$ $\rightarrow$ invisible $<1.0 \times 10^{-4}$ CL= 90%
Category: Neutral modes
The following data is related to the above value:
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$\Gamma({{\mathit \eta}}$ $\rightarrow$ invisible$)/\Gamma({{\mathit \eta}}$ $\rightarrow$ 2 ${{\mathit \gamma}})$
$\Gamma_{7}/\Gamma_{2}$
$\Gamma({{\mathit \eta}}$ $\rightarrow$ invisible$)/\Gamma_{\text{total}}$
$\Gamma_{7}/\Gamma$