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\begin{document}
    \footnotesize
    
    \begin{tabular}{lc}
        \toprule
        Source                          & Relative uncertainty ($\%$) \\
        \midrule
        Invariant-mass fits:            & \\
        \quad $m( D\xspace\xspace^-_ s\xspace\xspace\xspace p\xspace)$ fit:            & \\%1.46 \\
        \qquad Signal parametrisation   & 0.54 \\
        \qquad Combinatorial background parametrisation & 0.73 \\
        \qquad Constrained/fixed yields & 0.71 \\
        \qquad Specific background parametrisation & 0.89 \\
        \quad $m(\Lambda\xspace^+_ c\xspace\xspace\xspace \pi\xspace\xspace^-\xspace)$ fit:           & \\%0.28 \\
        \qquad Signal parametrisation   & 0.27 \\
        \qquad Combinatorial background parametrisation & 0.04 \\
        \qquad Constrained/fixed yields & 0.03 \\
        \qquad Specific background parametrisation & 0.01 \\
        Efficiencies:                   & \\
        \quad PID efficiency            & 0.49 \\
        \quad hardware trigger efficiency  & 1.15 \\
        \quad Reconstruction efficiency & 0.50 \\
        \midrule
        Total                           & 2.01 \\
        \bottomrule
    \end{tabular}
    
\end{document}
