Table 1.

Main preselection requirements. The term lepton designates either an electron or a muon. Definitions of the quantities and further details are given in the text

Quantity	Requirement
Primary vertex position	ρ PV<2 cm, |z PV|<24 cm
Jet p T threshold	>40 GeV
Jet η range	|η|<2.4
Number of jets	≥3 (L P and ANN methods), ≥4 (LS method)
Lepton p T threshold	>20 GeV
Muon η range	|η|<2.1
Muon isolation (relative)	<0.10
Electron η range	|η|<1.442, 1.56<|η|<2.4
Electron isolation (relative)	<0.07 (barrel), <0.06 (endcaps)
Lepton p T thresh. for veto	>15 GeV