\relax \@writefile{toc}{\contentsline {section}{\numberline {1}Introduction}{1}} \@writefile{toc}{\contentsline {section}{\numberline {2}A Simple Theory of Weak Interactions}{1}} \@writefile{toc}{\contentsline {section}{\numberline {3}Composite Particle Decay and Decay Constants}{1}} \@writefile{toc}{\contentsline {section}{\numberline {4}The Decay of the Pion}{2}} \newlabel{eq:dkrt}{{10}{2}} \@writefile{toc}{\contentsline {subsection}{\numberline {4.1}2-Body Decay Kinematics}{3}} \@writefile{toc}{\contentsline {subsection}{\numberline {4.2}The Decay Rate}{3}}