\begin{table*}

\centering

\caption{Mean and RMS widths of the longitudinal momentum distributions for six beams compared with the corresponding simulations.

\label{tab:PzInDataAndSimulation}}

\begin{tabular}{cccccc}

\hline

%\multicolumn{2}{c}{\multirow{3}{*}{Beam}}  & \multicolumn{2}{c}{Data} & \multicolumn{2}{c}{Simulation}\T\B\\ 

 &  & \multicolumn{2}{c}{Data} & \multicolumn{2}{c}{Simulation}\T\B\\ 

%\cline{3-6} 

% & & Mean $p_{z}$ & rms $p_{z}$ & Mean $p_{z}$ & rms $p_{z}$ \\ 

\multicolumn{2}{c}{Beam}  & Mean $p_{z}$ & RMS $p_{z}$ & Mean $p_{z}$ & RMS $p_{z}$ \\ 

 & & {MeV/$c$}& {MeV/$c$}& {MeV/$c$}& {MeV/$c$}\B\\ 

%\hline 

\hline

& $\left(6,140\right)$ &176.4$\pm$2.3 & 22.8$\pm$0.3 & 173.7$\pm$2.1 & 19.5$\pm$0.2\T\\ 

%\hline 

$\mu^-$& $\left(6,200\right)$ & 232.2$\pm$2.5 & 23.6$\pm$0.3 & 229.3$\pm$0.8 & 21.0$\pm$0.1\\ 

%\hline 

& $\left(6,240\right)$ &271.0$\pm$3.7 & 24.5$\pm$0.3 & 270.5$\pm$0.9 & 22.2$\pm$0.1\B\\ 

%\hline 

 %\hline 

\hline

 & $\left(6,140\right)$ & 176.5$\pm$2.0 & 24.4$\pm$0.3 & 176.6$\pm$3.7 & 25.5$\pm$0.5\T\\ 

%\hline 

 $\mu^+$& $\left(6,200\right)$ &229.2$\pm$2.4 & 25.9$\pm$0.3 & 230.8$\pm$1.4 & 28.9$\pm$0.2\\ 

%\hline 

 & $\left(6,240\right)$ & 267.7$\pm$2.9 & 25.8$\pm$0.3 & 269.2$\pm$4.2 & 31.3$\pm$0.5\B\\ 

%\hline 

\hline

 \end{tabular} 

 \end{table*}