
\documentclass[border=5pt,multi=true]{standalone}
\usepackage{standalone}
\usepackage{graphicx}
\usepackage{xspace}
\usepackage{color}
\usepackage{colortbl}
\usepackage{multirow}
\usepackage{amsmath}
\usepackage{ifthen}
\usepackage{graphpap}
\usepackage{rotating}
\usepackage{cancel}
\usepackage{hyperref}
\usepackage{hypcap}
\usepackage{amssymb}
\usepackage{amsfonts}
\usepackage{upgreek}
\usepackage{mciteplus}

\begin{document}
\begin{tabular}{l|l|c|c} %
\multirow{2}{*}{Category}  & \multirow{2}{*}{Source of uncertainty}
  & \multicolumn{2}{c} {$\Delta m$ [\!$ {\mathrm{\,Me\kern -0.1em V\!/}c^2}\xspace$]}  \\ %
& & $\psi(2S)$ &  $ X(3872)$ \xspace \\ \hline %
\multirow{4}{*}{Mass fitting}
& Natural width    &  --    & 0.01 \\
& Radiative tail   &  0.02  & 0.02 \\
& Resolution & -- & 0.01 \\
& Background model & 0.02  & 0.02\\
\hline 
\multirow{2}{*}{Momentum calibration}
& Average momentum scale  &    0.08   & 0.10 \\ 
& $\eta$ dependence of momentum scale & 0.02   & 0.03  \\ 
\hline
\multirow{1}{*}{Detector description}
& Energy loss correction      & 0.05  & 0.05 \\ 
\hline 
Detector alignment
& Track slopes  & 0.01    & 0.01 \\   
\hline \hline 
Total &                       & 0.10 & 0.12 \\ 
\end{tabular}
\end{document}
