
\documentclass[border=5pt,multi=true]{standalone}
\usepackage{standalone}
\usepackage{ifthen}
\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{pdflscape}
\usepackage{cite}
\usepackage{mciteplus}
\usepackage{multirow}
\usepackage{rotating}
\usepackage{longtable}

\begin{document}
  
  
  
  \begin{tabular}{ l | l l l l l }
   \hline
              &  $\gamma$ \xspace              &  $ r_B^{DK}$ \xspace             &  $\delta_B^{DK}$ \xspace             &  $ r_B^{DK^{*0}}$ \xspace        &  $\delta_B^{DK^{*0}}$ \xspace  \\
   \hline
     $\gamma$ \xspace        & \phantom{-}1    & \phantom{-}0.54 & \phantom{-}0.44 & \phantom{-}0.21 & -0.15     \\
     $ r_B^{DK}$ \xspace       & \phantom{-}0.54 & \phantom{-}1    & \phantom{-}0.39 & \phantom{-}0.11 & -0.08     \\
     $\delta_B^{DK}$ \xspace       & \phantom{-}0.44 & \phantom{-}0.39 & \phantom{-}1    & \phantom{-}0.08 & -0.05     \\
     $ r_B^{DK^{*0}}$ \xspace  & \phantom{-}0.21 & \phantom{-}0.11 & \phantom{-}0.08 & \phantom{-}1    & -0.13     \\
     $\delta_B^{DK^{*0}}$ \xspace  & -0.15           & -0.08           & -0.05           & -0.13           & 1         \\
   \hline
  \end{tabular}
\end{document}
