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LHC-Merging.in
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LHC-Merging.in
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# -*- ThePEG-repository -*-
##################################################
## Herwig/Merging example input file
##################################################
##################################################
## Collider type
##################################################
read Matchbox/PPCollider.in
read Merging/Merging.in
##################################################
## Beam energy sqrt(s)
##################################################
cd /Herwig/EventHandlers
set EventHandler:LuminosityFunction:Energy 7000*GeV
##################################################
## Process selection
##################################################
## Note that event generation may fail if no matching matrix element has
## been found. Coupling orders are with respect to the Born process,
## i.e. NLO QCD does not require an additional power of alphas.
## Model assumptions
read Matchbox/StandardModelLike.in
read Matchbox/DiagonalCKM.in
## Set the order of the couplings
cd /Herwig/Merging
set MergingFactory:OrderInAlphaS 0
set MergingFactory:OrderInAlphaEW 2
## Select the process
## You may use identifiers such as p, pbar, j, l, mu+, h0 etc.
## The j (jets) in the brackets are the additional LO jets
do MergingFactory:Process p p -> e+ e- [ j j ]
# Here you can specify how many NLO contributions should be merged.
set MergingFactory:NLOProcesses 0
# The merging scale rho_0 defines the Matrixelement region.
set Merger:MergingScale 10.*GeV
# Smear the merging scale rho= rho_0 (1- MergingScaleSmearing*(0.5-rnd()))
set Merger:MergingScaleSmearing 0.1
## Here we can use a preweighter to bias the event generation for
## e.g. large Ht/Pts. It results in non-unit weights but the cross sections
## are not changed. (Default: no preweight.)
set MPreWeight:HTPower 0
set MPreWeight:MaxPTPower 0
set MPreWeight:OnlyColoured False
read Matchbox/PQCDLevel.in
## Special settings required for on-shell production of unstable particles
## enable for on-shell top production
# read Matchbox/OnShellTopProduction.in
## enable for on-shell W, Z or h production
# read Matchbox/OnShellWProduction.in
# read Matchbox/OnShellZProduction.in
# read Matchbox/OnShellHProduction.in
# Special settings for the VBF approximation
# read Matchbox/VBFDiagramsOnly.in
##################################################
## Matrix element library selection
##################################################
## Select a generic tree/loop combination or a
## specialized NLO package
# read Matchbox/MadGraph-GoSam.in
# read Matchbox/MadGraph-MadGraph.in
# read Matchbox/MadGraph-NJet.in
# read Matchbox/MadGraph-OpenLoops.in
# read Matchbox/HJets.in
# read Matchbox/VBFNLO.in
## Uncomment this to use ggh effective couplings
## currently only supported by MadGraph-GoSam
# read Matchbox/HiggsEffective.in
##################################################
## Cut selection
## See the documentation for more options
##################################################
set /Herwig/Cuts/ChargedLeptonPairMassCut:MinMass 60*GeV
set /Herwig/Cuts/ChargedLeptonPairMassCut:MaxMass 120*GeV
cd /Herwig/MatrixElements/Matchbox/Utility
insert DiagramGenerator:ExcludeInternal 0 /Herwig/Particles/gamma
## cuts on additional jets
# read Matchbox/DefaultPPJets.in
# insert JetCuts:JetRegions 0 FirstJet
# insert JetCuts:JetRegions 1 SecondJet
# insert JetCuts:JetRegions 2 ThirdJet
# insert JetCuts:JetRegions 3 FourthJet
##################################################
## Scale choice
## See the documentation for more options
##################################################
cd /Herwig/MatrixElements/Matchbox/Scales/
set /Herwig/Merging/MergingFactory:ScaleChoice LeptonPairMassScale
##################################################
## Scale uncertainties
##################################################
# read Matchbox/MuDown.in
# read Matchbox/MuUp.in
##################################################
## Shower scale uncertainties
##################################################
# read Matchbox/MuQDown.in
# read Matchbox/MuQUp.in
##################################################
## PDF choice
##################################################
read Matchbox/FiveFlavourNoBMassScheme.in
read Matchbox/MMHT2014.in
##################################################
## CMW - Scheme
##################################################
### Use factor in alpha_s argument: alpha_s(q) -> alpha_s(fac*q)
### with fac=exp(-(67-3pi^2-10/3*Nf)/(33-2Nf))
read Merging/FactorCMWScheme.in
### Linear CMW multiplication:
### alpha_s(q) -> alpha_s(q)(1+K_g*alpha_s(q)/2pi )
# read Merging/LinearCMWScheme.in
##################################################
## Analyses
##################################################
cd /Herwig/Analysis
insert /Herwig/Generators/EventGenerator:AnalysisHandlers 0 Rivet
# insert /Herwig/Generators/EventGenerator:AnalysisHandlers 0 HepMC
read Merging/LHC7-Z-Analysis.in
#read Merging/LHC7-W-Analysis.in
#read Merging/LHC7-J-Analysis.in
#read Merging/LHC7-T-Analysis.in
#read Merging/LHC8-H-Analysis.in
##################################################
## Save the generator
##################################################
do /Herwig/Merging/MergingFactory:ProductionMode
set /Herwig/Generators/EventGenerator:IntermediateOutput Yes
cd /Herwig/Generators
saverun LHC-Merging EventGenerator
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