Table 4.

The first rows give the best fit values for ${\alpha }_S^{\mathrm{FSR}}$ for the Pw+Py8 setup, obtained from the inclusive distribution of different observables and the corresponding 68 and 95% confidence intervals. The last two rows give the preferred value of the renormalization scale in units of $M_{\mathrm{Z}}$, and the associated $\pm 1\sigma$ interval that can be used as an estimate of its variation to encompass the differences between data and the Pw+Py8 setup

$p_{\mathrm{T}}(\ell \ell )$ region	Inclusive	Away	Toward	Transverse
Best fit ${\alpha }_S^{\mathrm{FSR}}(M_{\mathrm{Z}})$	0.120	0.119	0.116	0.119
68% CI	[− 0.006, $+$ 0.006]	[− 0.011, $+$ 0.010]	[− 0.013, $+$ 0.011]	[− 0.006, $+$ 0.006]
95% CI	[− 0.013, $+$ 0.011]	[− 0.022, $+$ 0.019]	[− 0.030, $+$ 0.021]	[− 0.013, $+$ 0.012]
${\mu }_{\mathrm{R}}/M_{\mathrm{Z}}$	2.3	2.4	2.9	2.4
68% CI	[1.7, 3.3]	[1.4, 4.9]	[1.6, 7.4]	[1.7, 3.5]