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\usepackage{xspace}
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\begin{document}
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  \begin{tabular}{ccccc} \hline\hline
Model & \multicolumn{2}{c}{Adaptive I} & \multicolumn{2}{c}{Adaptive II}\\
     & $p(3\sigma)$& $\langle S \rangle$  &
    $p(3\sigma)$ & $\langle S \rangle$ \\
\hline
B (baseline) &76\% & 3.8$\sigma$& 41\% & 2.7$\sigma$\\  %
A  & 84\% & 4.3$\sigma$ &47\% &2.9$\sigma$ \\  %
B2 (add $f_{0}(980)$) &53\% &3.2$\sigma$ & 24\% &2.2$\sigma$ \\ %
B3 (vary $\kern 0.2em\overline{\kern -0.2em  K\xspace}{}\xspace^{*}_{0}(1430)^0$ magn.)  & 82\% & 4.0$\sigma$ & 41\%& 2.8$\sigma$\\ %
B4 (vary $\kern 0.2em\overline{\kern -0.2em  K\xspace}{}\xspace^{*}_{0}(1430)^0$ phase)  & 73\% & 3.7$\sigma$ &38\% & 2.7$\sigma$\\ %
\hline\hline
\end{tabular}
\end{document}
