$\Gamma($ ${{\mathit W}^{+}}$ $\rightarrow$ ${{\mathit \tau}^{+}}{{\mathit \nu}}$ $)/\Gamma($ ${{\mathit W}^{+}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit \nu}}$ $)$
$\Gamma_{4}/\Gamma_{2}$
$\Gamma($ ${{\mathit W}^{+}}$ $\rightarrow$ ${{\mathit \tau}^{+}}{{\mathit \nu}}$ $)/\Gamma($ ${{\mathit W}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}}$ $)$
$\Gamma_{4}/\Gamma_{3}$
$\Gamma($ ${{\mathit W}^{+}}$ $\rightarrow$ ${{\mathit \tau}^{+}}{{\mathit \nu}}$ $)/\Gamma_{\text{total}}$
$\Gamma_{4}/\Gamma$