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\begin{document}
\begin{tabular}{lccc}
\hline
Quantity &  $ p\xspace\xspace\mathrm{Pb}$ \xspace &  $\mathrm{Pb} p\xspace\xspace$ \xspace \\
\hline
$N_{\mathrm{cand.}}^{2.5<|y^*|<4.0}$      &$160\pm13$          & $166\pm13$ \\
Purity $\rho$               &$(99.1\pm0.4)\%$      & $(99.2\pm0.4)\%$ \\
Integrated luminosity  $\mathcal{L}$ \xspace [$\text{\,nb}\xspace^{-1}\xspace$] &$12.18\pm0.32$ &$18.58\pm0.46$ \\
$\epsilon^\mathrm{trk.}$     &$(80.8\pm3.5)\%$       &$(70.5\pm7.2)\%$ \\
$\epsilon^\mathrm{\mu-ID}$        &$(96.62\pm0.22)\%$       &$(97.01\pm0.19)\%$\\
$\epsilon^\mathrm{trig.}$        &$(97.79\pm0.24)\%$       &$(97.34\pm0.67)\%$\\
\hline
\end{tabular}
\end{document}
