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\begin{document}

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\begin{tabular}{lccc|ccc}
\toprule
Source       & \multicolumn{3}{c|}{Forward} & \multicolumn{3}{c}{Backward} \\
             & prompt & from $b$ & inclusive & prompt & from $b$ & inclusive \\
\hline
{\it Correlated between bins} & & & & & &\\
Track reconstruction&  1.5 & 1.5 & 1.5 & 1.5 & 1.5 & 1.5 \\
Muon identification &  1.3 & 1.3 & 1.3 & 1.3 & 1.3 & 1.3 \\
Trigger      &  1.9 & 1.9 & 1.9 & 1.9 & 1.9 & 1.9 \\
Luminosity   &  1.9 & 1.9 & 1.9 & 2.1 & 2.1 & 2.1 \\
Branching fraction  &  2.2 & 2.2 & 2.2 & 2.2 & 2.2 & 2.2 \\
Track quality and radiative tail &  1.5 & 1.5 & 1.5 & 1.5 & 1.5 & 1.5 \\
Mass fit     & $3.8-6.9$ & $0.3-3.9$ & $3.2-8.2$ & $9.2-10$ & $16-20$ & $3.0-5.4$ \\
\hline
{\it Uncorrelated between bins} & & & & & &\\
Multiplicity reweighting &  0.7 & 0.7 & 0.7 & 1.7 & 1.7 & 1.7 \\
Simulation kinematics & $0.6-10$ & $0.4-10$ & $0.2-9.8$ & 1.4 & 2.4 & $0.7-23$ \\
$t_z$ fit     & $1.6-12$ & $0.3-92$ & $0.1-18$ & $1.4-7.8$ & $8.5-29$ & $0.1-17$ \\
\bottomrule
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}
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