${{\mathit Z}}$ $\rightarrow$ invisible  Decay Mode Summary INSPIRE   PDGID:
S044.9
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{7}$ ${{\mathit Z}}$ $\rightarrow$ invisible $0.20000$ $\pm0.00055$
Note: This parameter is not directly used in the overall fit but is derived using the fit results; see the note “The ${{\mathit Z}}$ boson” and ref. LEP-SLC 2006 (Physics Reports (Physics Letters C) 427 257 (2006)).
The following data is related to the above value:
$\Gamma($ ${{\mathit Z}}$ $\rightarrow$ invisible$)$
$\Gamma_{7}$