Table 3.

List of systematic uncertainties considered. An “N” means that the uncertainty is taken as normalisation-only for all processes and channels affected, whereas an “S” denotes systematic uncertainties that are considered shape-only in all processes and channels. An “SN” means that the uncertainty is taken on both shape and normalisation. Some of the systematic uncertainties are split into several components for a more accurate treatment. This is the number indicated in the column labelled as “Comp.”

Systematic uncertainty	Type	Comp.
Luminosity	N	1
Physics objects
Electron	SN	5
Muon	SN	6
Jet energy scale	SN	22
Jet vertex fraction	SN	1
Jet energy resolution	SN	1
Jet reconstruction	SN	1
b-tagging efficiency	SN	6
c-tagging efficiency	SN	4
Light-jet tagging efficiency	SN	12
High-$p_{\mathrm{T}}$ tagging efficiency	SN	1
Background model
$t\overline{t}$ cross section	N	1
$t\overline{t}$ modelling: $p_{\mathrm{T}}$ reweighting	SN	9
$t\overline{t}$ modelling: parton shower	SN	3
$t\overline{t}$+heavy-flavour: normalisation	N	2
$t\overline{t}$+$c\overline{c}$: $p_{\mathrm{T}}$ reweighting	SN	2
$t\overline{t}$+$c\overline{c}$: generator	SN	4
$t\overline{t}$+$b\overline{b}$: NLO Shape	SN	8
W+jets normalisation	N	3
W $p_{\mathrm{T}}$ reweighting	SN	1
Z+jets normalisation	N	3
Z $p_{\mathrm{T}}$ reweighting	SN	1
Lepton misID normalisation	N	3
Lepton misID shape	S	3
Single top cross section	N	1
Single top model	SN	1
Diboson+jets normalisation	N	3
$t\overline{t}+V$ cross section	N	1
$t\overline{t}+V$ model	SN	1
Signal model
$t\overline{t}H$ scale	SN	2
$t\overline{t}H$ generator	SN	1
$t\overline{t}H$ hadronisation	SN	1
$t\overline{t}H$ PDF	SN	1