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\begin{document}
        \begin{tabular}{lcc}
            \hline\hline    
                Source & $\pi$-tagged & $\mu$-tagged \\
                \hline
                Fit model                        & 0.6         & 2  \\
                Mistag                           & --          & 4\\
                Weighting                        & 0.2         & 1 \\
                Secondary decays                 & 0.3         & -- \\
                Peaking background               & 0.5         & --\\
                 $ B\xspace$ \xspace fractions                     & --          & 1\\
                 $ B\xspace$ \xspace reco. efficiency              & --          & 2 \\
                \hline
                Total                            & 0.9         & 5\\
                \hline\hline
        \end{tabular}
\end{document}
