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

\begin{document}
    \small
  
\begin{tabular}{lcc}
\hline \hline
   Systematic uncertainty & $ A_{ C\!P\xspace}\xspace(K\!K\pi)$ & $ A_{ C\!P\xspace}\xspace(\pi\pi\pi)$      \\ 
    \hline
Signal model              & \;\;\;\,0.001  & \;\;\;\,0.0005  \\
Combinatorial background  & \;\;\;\,0.003  & \;\;\;\,0.0008 \\
Peaking background        & $\;\;\;\,0.001$& $\;\;\;\,0.0025$\\
Acceptance                & \;\;\;\,0.014 & \;\;\;\,0.0032 \\ 
Part. rec. background   & \;\;\;\,0.005  & \;\;\;\,--  \\ 
 $ A_{\rm D}(\pi\xspace^\pm\xspace)$ \xspace uncertainty  & \;\;\;\,0.003 & \;\;\;\,0.0025 \\ 
 $ A_{\rm D}( K\xspace^\pm\xspace)$ \xspace uncertainty   & \;\;\;\,0.003  & \;\;\;\,0.0032  \\ 
 $ A_{\rm D}( K\xspace^\pm\xspace)$ \xspace kaon kinematics    & \;\;\;\,0.008 & \;\;\;\,0.0075 \\ 
\hline
Total                     & \;\;\;\,0.018  & \;\;\;\,0.0094   \\
\hline \hline
  \end{tabular}
\end{document}
