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\begin{document}
  
  \begin{tabular}{ l | c | c}
	Source &  $\cal B$ \xspace( $ B\xspace\xspace^+\xspace\xspace\!\rightarrow\xspace \pi\xspace\xspace^+\xspace \mu\xspace^+\xspace \mu\xspace^-\xspace$ \xspace) (\%) & $\frac{\cal B\xspace( B\xspace\xspace^+\xspace\xspace\!\rightarrow\xspace \pi\xspace\xspace^+\xspace \mu\xspace^+\xspace \mu\xspace^-\xspace\xspace)}{\cal B\xspace( B\xspace\xspace^+\xspace\xspace\!\rightarrow\xspace  K\xspace\xspace^+\xspace \mu\xspace^+\xspace \mu\xspace^-\xspace\xspace)}$ (\%)\\
      \hline
        Form factors   & 3.0 & 1.7 \\
	Trigger efficiency & 1.4 & 1.4 \\
      	PID performance & 1.1 & 1.1 \\
	Data simulation differences & 0.4 & 0.4\\
	Simulation sample size & 0.7 & 0.7 \\
	 $\cal B$ \xspace( $ B\xspace\xspace^+\xspace\xspace\!\rightarrow\xspace  { J\xspace\mskip -3mu/\mskip -2mu\psi\xspace\mskip 2mu}\xspace (\rightarrow\xspace \mu\xspace^+\xspace \mu\xspace^-\xspace)  K\xspace\xspace^+\xspace$ \xspace) & 3.5 & -- \\
	\hline 
	Total & 5.0 & 2.6 \\
    \end{tabular}
     
\end{document}
