
\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{cite}
\usepackage{mciteplus}
\usepackage{multirow}
\usepackage{bm}
\usepackage{rotating}
\usepackage{longtable}

\begin{document}
\begin{tabular}{cc}
 $\eta^{\mu^{+}}$ \xspace &  $ R_{ W\xspace^+\xspace Z\xspace\xspace}$ \xspace \\ \hline
2.00 -- 2.25 &     15.478        $\pm$     0.134 $\pm$ 0.174 $\pm$ 0.024 $\pm$ 0.001 \\
2.25 -- 2.50 &     14.490        $\pm$     0.119 $\pm$ 0.136 $\pm$ 0.022 $\pm$ 0.001 \\
2.50 -- 2.75 &     13.593        $\pm$     0.112 $\pm$ 0.137 $\pm$ 0.020 $\pm$ 0.001 \\
2.75 -- 3.00 &     12.406        $\pm$     0.108 $\pm$ 0.126 $\pm$ 0.019 $\pm$ 0.001 \\
3.00 -- 3.25 &     10.937        $\pm$     0.102 $\pm$ 0.115 $\pm$ 0.016 $\pm$ 0.001 \\
3.25 -- 3.50 &     \phantom{0}9.353        $\pm$     0.097 $\pm$ 0.114 $\pm$ 0.015 $\pm$ 0.001 \\
3.50 -- 4.00 &     \phantom{0}6.677        $\pm$     0.063 $\pm$ 0.093 $\pm$ 0.010 $\pm$ 0.001 \\
4.00 -- 4.50 &     \phantom{0}3.444        $\pm$     0.072 $\pm$ 0.103 $\pm$ 0.005 $\pm$ 0.000 \\
\end{tabular}

\begin{tabular}{cc}
 $\eta^{\mu^{-}}$ \xspace &  $ R_{ W\xspace^-\xspace Z\xspace\xspace}$ \xspace \\ \hline
2.00 -- 2.25 &     9.521        $\pm$     0.095 $\pm$ 0.117 $\pm$ 0.028 $\pm$ 0.001 \\
2.25 -- 2.50 &     8.754        $\pm$     0.080 $\pm$ 0.090 $\pm$ 0.025 $\pm$ 0.001 \\
2.50 -- 2.75 &     8.449        $\pm$     0.076 $\pm$ 0.086 $\pm$ 0.025 $\pm$ 0.001 \\
2.75 -- 3.00 &     8.235        $\pm$     0.077 $\pm$ 0.089 $\pm$ 0.024 $\pm$ 0.000 \\
3.00 -- 3.25 &     8.400        $\pm$     0.082 $\pm$ 0.096 $\pm$ 0.024 $\pm$ 0.001 \\
3.25 -- 3.50 &     8.414        $\pm$     0.088 $\pm$ 0.096 $\pm$ 0.024 $\pm$ 0.000 \\
3.50 -- 4.00 &     8.615        $\pm$     0.075 $\pm$ 0.107 $\pm$ 0.025 $\pm$ 0.001 \\
4.00 -- 4.50 &     8.166        $\pm$     0.130 $\pm$ 0.215 $\pm$ 0.023 $\pm$ 0.000 \\
\end{tabular}
\end{document}
