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\begin{document}
\begin{tabular}{@{}lllll@{}}
    \toprule
    Source                     &$\mbox{ B\xspace\xspace^+\xspace\xspace\!\rightarrow\xspace  { J\xspace\mskip -3mu/\mskip -2mu\psi\xspace\mskip 2mu}\xspace K\xspace\xspace^+\xspace}\xspace$& $\mbox{ B\xspace\xspace^+\xspace\xspace\!\rightarrow\xspace \kern 0.18em\overline{\kern -0.18em  D\xspace}\xspace{}^0\xspace\pi\xspace\xspace^+\xspace}\xspace$ & \mbox{ $ B\xspace\xspace^0\xspace\!\rightarrow\xspace  D\xspace\xspace^-\xspace\pi\xspace\xspace^+\xspace$ }\xspace &  \mbox{ $\Lambda\xspace^0_ b\xspace\xspace\xspace\!\rightarrow\xspace \Lambda\xspace^+_ c\xspace\xspace\xspace\pi\xspace\xspace^-\xspace$ }\xspace\\
    \midrule
    Luminosity                 & 2.6     & 2.6     & 2.6     & 2.6      \\
    Trigger                    & 1.0     & 1.0     & 1.0     & 1.0      \\
    Signal yield               & 2.0     & 2.0     & 2.0     & 2.0      \\
    Selection                  & 1.0     & 1.0     & 3.0     & 2.0      \\
    Hadron tracking            & 1.5     & 4.5     & 6.0     & 6.0      \\
    Tracking efficiency method & 2.4     & 2.4     & 3.2     & 3.2      \\
    Tracking sample size       & $2.0$--$4.3$ & $2.4$--$4.9$ & $3.4$--$9.5$ & $3.3$--$8.0$  \\
    Branching fraction         & 3.1     & 3.2     & 6.0     & 9.6      \\
    PID binning                & $0.0$--$0.7$ & $0.0$--$0.6$ & $0.0$--$0.9$ & $0.1$--$1.4$  \\
    PID sample size            & $1.4$--$2.7$ & $0.2$--$0.6$ & $0.2$--$0.7$ & $0.2$--$0.4$  \\
    Kinematics                 & $0.1$--$4.1$ & $0.5$--$5.4$ & $0.1$--$7.0$ & $0.2$--$9.4$  \\
    Dalitz structure           & --      & --      & --      & $0.8$--$3.1$  \\
    Simulation sample size  & $0.7$--$2.2$ & $0.8$--$2.4$ & $1.4$--$3.7$ & $0.9$--$4.1$  \\
    \midrule
    Total                   &$6.3$--$8.1$  & $7.5$--$10.3$ & $10.9$--$14.5$ & $13.1$--$18.3$\\ 
    \bottomrule
\end{tabular}
\end{document}
