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\begin{document}
\begin{tabular}{@{}lccc@{}}
Component          &   \multicolumn{3}{c}{Yield} \\
                   & Long            & Downstream      &    Total      \\
\midrule
 $ B\xspace\xspace^0\xspace\!\rightarrow\xspace  D\xspace\xspace K\xspace\xspace^{*0}\xspace$ \xspace            & $29\pm5\phantom{0}$        & $60\pm8\phantom{0}$        & $89\pm11$    \\[3mm]
 $ B\xspace\xspace^0_ s\xspace\xspace\xspace\!\rightarrow\xspace  D\xspace\xspace\kern 0.2em\overline{\kern -0.2em  K\xspace}{}\xspace{}^{*0}\xspace$ \xspace            & $0.59\pm0.12$   & $1.21\pm0.23$   & $\phantom{0}1.8\pm0.3\phantom{0}$  \\
Combinatorial      & $\phantom{0}9.6\pm1.0\phantom{0}$     & $16.1\pm1.4\phantom{0}$    & $25.7\pm1.7\phantom{0}$ \\
 $ B\xspace\xspace^0\xspace\!\rightarrow\xspace  D\xspace\xspace^*\xspace K\xspace\xspace^{*0}\xspace$ \xspace          & $0.06\pm0.02$   & $0.06\pm0.02$   & $0.12\pm0.03$\\
 $ B\xspace\xspace^0_ s\xspace\xspace\xspace\!\rightarrow\xspace  D\xspace\xspace^*\xspace\kern 0.2em\overline{\kern -0.2em  K\xspace}{}\xspace{}^{*0}\xspace$ \xspace          & $\phantom{0}4.1\pm0.8\phantom{0}$     & $\phantom{0}7.9\pm1.3\phantom{0}$     & $11.9\pm1.7\phantom{0}$ \\
 $ B\xspace\xspace^0\xspace\!\rightarrow\xspace  D\xspace\xspace\rho\xspace\xspace^0\xspace$ \xspace            & $0.20\pm0.05$   & $0.37\pm0.09$   & $0.57\pm0.11$\\[3mm]
Total background   & $14.5\pm1.3\phantom{0}$    & $25.6\pm1.8\phantom{0}$    & $40.1\pm2.4\phantom{0}$ \\
\end{tabular}
\end{document}
