
\documentclass[border=5pt,multi=true]{standalone}
\usepackage{standalone}
\usepackage{multirow}
\usepackage{ifthen}
\usepackage{longtable}
\usepackage{dcolumn}
\usepackage{microtype}
\usepackage{lineno}
\usepackage{xspace}
\usepackage{caption}
\usepackage{graphicx}
\usepackage{color}
\usepackage{colortbl}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsfonts}
\usepackage{upgreek}
\usepackage{hyperref}
\usepackage{hypcap}
\usepackage{cite}
\usepackage{mciteplus}

\begin{document}
\footnotesize
\begin{tabular}{l......} 
\hline
\multirow{2}{2cm}{\mbox{Source}}   &  \multicolumn{2}{c}{$D^*_0(2400)^-$}   &  \multicolumn{2}{c}{$D^*_2(2460)^-$}  &  \multicolumn{2}{c}{$D^*_3(2760)^-$}  \\\cline{2-7}
 &  \multicolumn{1}{c}{$\Gamma_0$}  &  \multicolumn{1}{c}{$m_0$}  &  \multicolumn{1}{c}{$\Gamma_0$}  &  \multicolumn{1}{c}{$m_0$}  &  \multicolumn{1}{c}{$\Gamma_0$}  &  \multicolumn{1}{c}{$m_0$} \\
\hline
PID  &  8.9  &  5.9   &  1.0  &  0.3  &  1.1  &  8.6 \\
Trigger  &  1.1  &  0.6   &  0.1  &  <0.1  &  0.1  &  0.1 \\
Reconstruction  &  <0.1  &  <0.1  &  <0.1  &  <0.1  &  <0.1  &  <0.1   \\
Simulation statistic  &  4.6  &  0.5   &  0.2  &  0.1  &  2.4  &  0.4 \\
Background model  &  2.3  &  0.9   &  0.1  &  <0.1  &  2.7  &  0.8 \\
$D^*(2010)^-$ veto  &  14.9  &  9.0   &  1.4  &  0.3  &  12.1  &  5.4 \\
\hline
Total (experiment)  &  18.1  &  10.8  &  1.7  &  0.4  &  12.7  &  10.2\\
\hline
Additional resonances  &  8.5  &  1.0   &  0.3  &  0.2  &  1.4  &  1.1 \\
RBW parameters  &  6.0  &  1.5   &  <0.1  &  0.1  &  8.9  &  2.3  \\
$\pi\pi$ res. mass, width  &  1.4  &  0.9  &  0.1  &  0.1  &  1.3  &  0.1  \\
$B^0$, $D^0$ mass  &  0.2   &  0.2   &  0.2   &  0.2   &  0.2   &  0.2 \\
\hline
Total (model)  &  10.5  &  2.0  &  0.4  &  0.3  &  9.1  &  2.6 \\
\hline
Total (all)  &  21.0   &  11.0   &  1.8   &  0.5   &  15.6   &  10.5 \\
\hline
\end{tabular}
\end{document}
