v5.1.3.30 [@Alwall:2011uj] interfaced with <span style="font-variant:small-caps;">Pythia</span> v6.4.26. In all samples the CT10 PDF set [@Gao:2013xoa] and the Z2\* <span style="font-variant:small-caps;">Pythia</span>6 tune  [@Chatrchyan:2013gfi; @Khachatryan:2015pea] are used. The decay of tau-leptons is modeled using the <span style="font-variant:small-caps;">Tauola</span> program [@Davidson:2010rw], while the emission of photons from finale state leptons uses <span style="font-variant:small-caps;">Pythia</span>6. The strong coupling constant $\alpha_s$ has been set to $0.130$ at the $Z$-boson mass scale for all matrix element calculations. The effect of multiple interactions per bunch crossing (pile-up) has been simulated by overlaying MC-generated minimum bias events. The <span style="font-variant:small-caps;">Geant4</span> program was used to simulate the passage of particles through the CMS detector [@Agostinelli:2002hh].

The simulated event samples are reweighted to describe the distribution of the number of pile-up conditions in the data by reweighting the $\rho$ parameter distribution, where $\rho$ denotes the diffuse offset energy density [@Khachatryan:2016kdb]. Moreover, a reweighting of the longitudinal position of the primary $pp$ collision vertex of the MC samples to data has been performed.

[l | l | l]{} Process & Dataset Name & $\sigma$ \[pb\]\
QCD (Inclusive, <span style="font-variant:small-caps;">Pythia6</span>) & QCD\_Pt-15to3000\_TuneZ2star [@CMS:QCD1] & $2\cdot10^{10}$\
QCD (4-Jets , <span style="font-variant:small-caps;">Alpgen</span>) & QCD4Jets\_Pt-400to5600\_TuneZ2Star [@CMS:QCD2] & -\
$pp \rightarrow t\bar{t}+X \rightarrow 2l2\nu2b+ X$ & TTJets\_FullLeptMGDecays\_TuneP11TeV\_8TeV [@CMS:MCTTLep] 