
\documentclass[border=5pt,multi=true]{standalone}
\usepackage{standalone}
\usepackage{placeins}
\usepackage{ifthen}
\usepackage{longtable}
\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{xspace}
\usepackage{upgreek}
\usepackage{cite}
\usepackage{mciteplus}

\begin{document}
 

\begin{tabular}{lccccc}
\hline
systematic variation &  \multicolumn{1}{c}{$X(4140)$} 
           &  \multicolumn{2}{c}{$X(4274)$} 
           &  \multicolumn{1}{c}{$X(4500)$}
           &  \multicolumn{1}{c}{$X(4700)$} \\
\multicolumn{1}{r}{alternative $J^{PC}$}  &  \multicolumn{1}{c}{$2^{++}$} 
           &  \multicolumn{1}{c}{$1^{-+}$} 
           &  \multicolumn{1}{c}{$2^{-+}$} 
           &  \multicolumn{1}{c}{$1^{++}$} 
           & \multicolumn{1}{c}{$1^{++}$} \\
\hline\hline
default fit   & 7.6  &  6.4 & 6.4 & 5.2 &  4.9 \\
\hline
$K'(1^+)$ $L_{ K\xspace\xspace^*\xspace}$ + 2 & {\!\!12.2} & 6.2 & 7.4 & 5.4 &  5.1\\
$K_2(2^-)$ $L_{ K\xspace\xspace^*\xspace}$ + 2 & {\bf 5.7} & 6.0 & {\bf 5.8} & 5.2  & 4.5\\
${K^*_3(1780)}$ included & 6.2 & 6.6 & 6.3 & 4.9  & {\bf 4.5}\\
extra $K^{*}(1^-)$ included & 6.8 & 6.1 & {\bf 5.8} & 5.8 &  4.7\\
extra $K_2(2^-)$ included & 6.9 & 6.7 & 6.2 & {\bf 4.0} &  4.8\\
NR exp & 7.5 & 6.5 & 6.1 & 8.9 &  4.7\\
\hline
\end{tabular}
\end{document}
