\newcommand{\lagr}{\cal{L}}
\newcommand{\mueg}{$\mu^{+} \rightarrow e^{+}\gamma$}
\newcommand{\meee}{$\mu \rightarrow eee$}
\newcommand{\muenn}{$\mu \rightarrow e \nu \overline{\nu}$}
\newcommand{\muenng}{$\mu \rightarrow e \nu \overline{\nu} \gamma$}
\newcommand{\muec}{$\mu^{-} N \rightarrow e^{-} N$}
\newcommand{\muecaz}{$\mu^{-} + N(A,Z) \rightarrow e^{-} + N(A,Z)$}
\newcommand{\sindrumlimit}
{$\mathcal{B} (\mu^- + Au \rightarrow e^- +Au) < 7\times 10^{-13}$}