top+N-jet-quark production (ttbar+N jet) at LO QCD +PS. Madgraph5 with Pythia6. Version MG5_aMC v2_3_2_2. All top decays. PYTHIA6 used for parton_shower and hadronization. PDF is 230000 (nn23lo1). See more details in the log file.

Note: Number of events and cross section in the sample was estimated from a single file. The number of events varies from file to file. You need to run over all files to calculate correctly luminosity.

set group_subprocesses Auto
set ignore_six_quark_processes False
set loop_color_flows False
set gauge unitary
set complex_mass_scheme False
set max_npoint_for_channel 0
import model sm
define p = g u c d s u~ c~ d~ s~
define j = g u c d s u~ c~ d~ s~
define l+ = e+ mu+
define l- = e- mu-
define vl = ve vm vt
define vl~ = ve~ vm~ vt~
define j = g u c d s u~ c~ d~ s~ b b~
define p = g u c d s u~ c~ d~ s~ b b~
generate p p > t t~ @1
add process p p > t t~ j @2
add process p p > t t~ j j @3
add process p p > t t~ j j j @4
output ttbar_3jet