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\begin{document}

\begin{tabular}{l|c|c|c}
                       & Signal yield                    & Mass [\! $ {\mathrm{\,Me\kern -0.1em V\!/}c^2}$ \xspace\!]                    & Width(s) [\! $ {\mathrm{\,Me\kern -0.1em V\!/}c^2}$ \xspace\!]     \\
\hline
\multirow{2}{*}{ $\Lambda^0_ b\xspace\xspace$ \xspace} & \multirow{2}{*}{$6870 \pm 110$} & \multirow{2}{*}{$5619.53 \pm 0.13$}  & $\sigma_1 = ~\,6.4 \pm 0.5$ \\
                       &                                 &                                      & $\sigma_2 = 12.5 \pm 1.3$ \\
 $\Xi^-_ b\xspace\xspace$ \xspace                  & $111  \pm 12$                   & $5795.8 \pm 0.9 $                    & $7.8 \pm 0.7$             \\
 $\POmega^-_ b\xspace\xspace$ \xspace                  & $19   \pm 5 $                   & $6046.0 \pm 2.2 $                    & $7.2$ (fixed)             \\
\end{tabular}
\end{document}
