${{\mathit \pi}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}{{\mathit \nu}}{{\overline{\mathit \nu}}}$   Decay Mode Summary INSPIRE   PDGID:
S008.11
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{7}$ ${{\mathit \pi}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}{{\mathit \nu}}{{\overline{\mathit \nu}}}$ $<9 \times 10^{-6}$ CL= 90% 30
The following data is related to the above value:
$\Gamma($ ${{\mathit \pi}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}{{\mathit \nu}}{{\overline{\mathit \nu}}}$ $)/\Gamma($ ${{\mathit \pi}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}$ $)$
$\Gamma_{7}/\Gamma_{1}$