\hline Data & nominator  & den & $\epsilon_{\mathrm{trigger}}$ $\pm \sigma_{stat}}$ \\\hline
  ee & 2684 & 2906 &    0.924 $\pm$ 0.005       \\
  \mu\mu   & 1709 & 1805 &    0.947 $\pm$ 0.006       \\
  e\mu   & 4033 & 4539 &    0.889 $\pm$ 0.005       \\
  && RT    1.052 $\pm$ 0.007  $\pm$ 0.064     \\\hline