Table 4.

Relative impact of the main systematic uncertainties on the expected separation (expressed in terms of numbers of standard deviations) between the SM $J^P=0^{+}$ and $J^P=0^{-}$ hypotheses for the $H\to Z{Z}^{\ast }\to 4\ell$ $J^P$-MELA analysis

Source of the systematic uncertainty	Relative impact (%)
Higgs boson mass experimental uncertainty	$\pm 2$
$Z{Z}^{\ast }$ pdf	$\pm 0.8$
Muon momentum scale	$\pm 0.7$
$Zbb\to \ell \ell \mathit{\mu }\mathit{\mu }$ normalisation	$\pm 0.6$
$Z{Z}^{\ast }$ scale	$\pm 0.6$
Luminosity	$\pm 0.6$
$e/\mathit{\gamma }$ resolution model (sampling term)	$\pm 0.5$
$e/\mathit{\gamma }$ resolution model (constant term)	$\pm 0.5$
$Z\to \ell \ell ee$ normalisation	$\pm 0.5$
Fraction of wrongly paired $4\ell$ candidates	$\pm 0.4$