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

\begin{document}
    
    
    \begin{tabular}{l|c}
                                                & Absolute    \\
      Source of uncertainty                     & uncertainty \\ \hline
      {\bf Production asymmetry:}               &             \\
      ~~~Difference in  $ b\xspace$ \xspace-hadron mixture   & $0.02\%$    \\
      ~~~Difference in  $ B\xspace$ \xspace decay time acceptance & $0.02\%$    \\
      {\bf Production and detection asymmetry:} &             \\
      ~~~Different weighting                    & $0.05\%$    \\
      {\bf Background from real \boldmath{ $ D\xspace\xspace^0$ \xspace} mesons:}  &    \\
      ~~~Mistag asymmetry                       & $0.02\%$    \\
      {\bf Background from fake \boldmath{ $ D\xspace\xspace^0$ \xspace} mesons:}  &    \\
      ~~~ $ D\xspace\xspace^0$ \xspace mass fit model                     & $0.05\%$    \\
      ~~~Low-lifetime background in  $ D\xspace\xspace^0\xspace\!\rightarrow\xspace \pi\xspace\xspace^-\xspace\pi\xspace\xspace^+\xspace$ \xspace      & $0.11\%$    \\
      ~~~ $\Lambda\xspace^+_ c\xspace\xspace$ \xspace background in  $ D\xspace\xspace^0\xspace\!\rightarrow\xspace  K\xspace\xspace^-\xspace K\xspace\xspace^+\xspace$ \xspace                 & $0.03\%$    \\ \hline
      {\bf Quadratic sum}                       & $0.14\%$    \\
    \end{tabular}
  
  
\end{document}
