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\begin{document}
 
\begin{tabular}{l|rrrr}
Component & $\sigma(x_-)$ & $\sigma(y_-)$ & $\sigma(x_+)$ & $\sigma(y_+)$ \\ \hline
Statistical &                                              $4.3$ & $5.2$ & $4.5$ & $3.7$ \\
& & & & \\
Global fit shape parameters &                                      $0.4$ &  $0.4$ &  $0.6$ &  $0.4$ \\
Efficiency effects &                                                      $0.3$ &  $0.4$ &  $0.3$ &  $0.4$ \\
 $ C\!P$ \xspace violation in control mode &                                            $1.3$ &  $0.4$ &  $1.5$ &  $0.2$ \\
Migration &                                                                   $0.4$ &  $0.2$ &  $0.4$ &  $0.2$ \\
Partially reconstructed background &                           $0.2$ &  $0.3$ &  $0.2$ &  $0.2$ \\
PID efficiency &                                                     $0.1$ &  $0.2$ &  $0.2$ &  $<0.1$ \\
Shape of misidentified $B^\pm \rightarrow\xspace D \pi^\pm$  &  
                                                                                    $0.1$ &  $0.1$ &  $0.3$ &  $<0.1$ \\
Bias correction &                                                          $0.2$ &  $0.3$ &  $0.2$ &  $0.5$ \\
\hline
Total experimental systematic&                                                     $1.5$ & $0.9$ & $1.8$ & $0.8$  \\
& & & & \\
Strong-phase systematic &                                              $0.6$ &  $2.3$ &  $1.4$ &  $3.0$ \\
\end{tabular}
\end{document}
