Table 9.

The expected and observed 95% CL exclusion limits as well as the best fit values for the branching ratio of $\text{Br}(Z\to \mathit{\mu }\mathit{\tau })[{10}^{-5}]$ are shown for SR1, SR2 and the combined fit. To calculate these quantities for SR1 and SR2, the signal strengths are decorrelated in the signal regions and set to zero in the control regions

$\text{Br}(Z\to \mathit{\mu }\mathit{\tau })({10}^{-5})$	SR1	SR2	Combined
Expected limit	$2.6_{-0.7}^{+1.1}$	$6.4_{+2.8}^{-1.8}$	$2.6_{-0.7}^{+1.1}$
Observed limit	1.5	7.9	1.7
Best fit	$-2.1_{-1.3}^{+1.2}$	$2.6_{-2.6}^{+2.9}$	$-1.6_{-1.4}^{+1.3}$