${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \nu}}{{\overline{\mathit \nu}}}$   Decay Mode Summary INSPIRE   PDGID:
S010.20
Mode (*) Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{39}$ ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \nu}}{{\overline{\mathit \nu}}}$ ($1.14$ ${}^{+0.40}_{-0.33}$) $ \times 10^{-10}$ 227
Category: Lepton family number ($\mathit LF$), Lepton number ($\mathit L$), $\Delta \mathit S$ = $\Delta \mathit Q$ ($\mathit SQ$) violating modes, or $\Delta \mathit S$ = 1 weak neutral current ($\mathit S1$) modes
Note: (S1) Allowed by higher-order electroweak interactions.
The following data is related to the above value:
$\Gamma($ ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \nu}}{{\overline{\mathit \nu}}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{39}/\Gamma$