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\begin{document}
  
    \begin{tabular}{cd{2}@{\,$\pm$\,}d{2}cd{2}@{\,$\pm$\,}d{2}}
      \hline
       $m(\Xi_{ c\xspace\xspace c\xspace\xspace}^+\xspace)$  &  \multicolumn{2}{c}{$\alpha_u$\,($\times 10^{-5}$)} & Resolution correction & \multicolumn{2}{c}{$\alpha$\,($\times 10^{-5}$)}\\
      \hline
      3300 $ {\mathrm{\,Me\kern -0.1em V\!/}c^2}$ \xspace & 2.29 & 0.61 & 0.992 & 2.30 & 0.62 \\
      3500 $ {\mathrm{\,Me\kern -0.1em V\!/}c^2}$ \xspace & 2.38 & 0.62 & 0.957 & 2.49 & 0.65 \\
      3700 $ {\mathrm{\,Me\kern -0.1em V\!/}c^2}$ \xspace & 2.36 & 0.63 & 0.903 & 2.61 & 0.70 \\
      \hline
    \end{tabular}
  
  
\end{document}
