Page Menu
Home
HEPForge
Search
Configure Global Search
Log In
Files
F11221674
LHE-FxFx.in
No One
Temporary
Actions
View File
Edit File
Delete File
View Transforms
Subscribe
Mute Notifications
Award Token
Flag For Later
Size
6 KB
Subscribers
None
LHE-FxFx.in
View Options
##################################################
# Example generator based on LHC parameters
# For FxFx merging with MadGraph5/aMC@NLO
# usage: Herwig read FxFx.in
##################################################
# Technical parameters for this run
##################################################
cd /Herwig/Generators
set EventGenerator:NumberOfEvents 100000000
set EventGenerator:RandomNumberGenerator:Seed 31122001
set EventGenerator:PrintEvent 1
set EventGenerator:MaxErrors 10000
##################################################################
# Create the Les Houches file handler and reader for FxFx events
##################################################################
cd /Herwig/EventHandlers
library HwFxFx.so
create Herwig::FxFxEventHandler LesHouchesHandler
# set the various step handlers
set LesHouchesHandler:PartonExtractor /Herwig/Partons/PPExtractor
set LesHouchesHandler:HadronizationHandler /Herwig/Hadronization/ClusterHadHandler
set LesHouchesHandler:DecayHandler /Herwig/Decays/DecayHandler
# set the weight option (for MC@NLO)
set LesHouchesHandler:WeightOption VarNegWeight
# set event hander as one to be used
set /Herwig/Generators/EventGenerator:EventHandler /Herwig/EventHandlers/LesHouchesHandler
# Set up an EMPTY CUTS object
# Normally you will have imposed any cuts you want
# when generating the event file and don't want any more
# in particular for POWHEG and MC@NLO you must not apply cuts on the
# the extra jet
create ThePEG::Cuts /Herwig/Cuts/NoCuts
# Create a LH reader specialised for FxFx events
cd /Herwig/EventHandlers
create Herwig::FxFxFileReader FxFxLHReader
insert LesHouchesHandler:FxFxReaders[0] FxFxLHReader
# Create the FxFxHandler for merging with the shower
cd /Herwig/Shower
library HwFxFxHandler.so
create Herwig::FxFxHandler FxFxHandler
set /Herwig/Shower/FxFxHandler:SplittingGenerator /Herwig/Shower/SplittingGenerator
set /Herwig/Shower/FxFxHandler:KinematicsReconstructor /Herwig/Shower/KinematicsReconstructor
set /Herwig/Shower/FxFxHandler:PartnerFinder /Herwig/Shower/PartnerFinder
set /Herwig/EventHandlers/LesHouchesHandler:CascadeHandler /Herwig/Shower/FxFxHandler
###################################################################################
# PDF settings #
# You may wish to use the same PDF as the events were generated with #
###################################################################################
create ThePEG::LHAPDF /Herwig/Partons/LHAPDF ThePEGLHAPDF.so
set /Herwig/Partons/LHAPDF:PDFName NAME_OF_PDF
set /Herwig/Partons/RemnantDecayer:AllowTop Yes
set /Herwig/Partons/LHAPDF:RemnantHandler /Herwig/Partons/HadronRemnants
set /Herwig/Particles/p+:PDF /Herwig/Partons/LHAPDF
set /Herwig/Particles/pbar-:PDF /Herwig/Partons/LHAPDF
set /Herwig/Partons/PPExtractor:FirstPDF /Herwig/Partons/LHAPDF
set /Herwig/Partons/PPExtractor:SecondPDF /Herwig/Partons/LHAPDF
# We would recommend the shower uses the default PDFs with which it was tuned.
# However it can be argued that the same set as for the sample should be used for
# matched samples, i.e. MC@NLO (and less so POWHEG)
set /Herwig/Shower/ShowerHandler:PDFA /Herwig/Partons/LHAPDF
set /Herwig/Shower/ShowerHandler:PDFB /Herwig/Partons/LHAPDF
# You can in principle also change the PDFs for the remnant extraction and
# multiple scattering. As the generator was tuned with the default values
# this is STRONGLY DISCOURAGED without retuning the MPI parameters
# create the reader and set cuts
set /Herwig/EventHandlers/FxFxLHReader:FileName NAME_OF_FILE #(the file can be compressed (gziped,bziped))
set /Herwig/EventHandlers/FxFxLHReader:WeightWarnings false
set /Herwig/EventHandlers/FxFxLHReader:AllowedToReOpen No
set /Herwig/EventHandlers/FxFxLHReader:InitPDFs 0
set /Herwig/EventHandlers/FxFxLHReader:Cuts /Herwig/Cuts/NoCuts
# option to ensure momentum conservation is O.K. due rounding errors (recommended)
set /Herwig/EventHandlers/FxFxLHReader:MomentumTreatment RescaleEnergy
# set the pdfs
set /Herwig/EventHandlers/FxFxLHReader:PDFA /Herwig/Partons/LHAPDF
set /Herwig/EventHandlers/FxFxLHReader:PDFB /Herwig/Partons/LHAPDF
# if using BSM models with QNUMBER info
#set /Herwig/EventHandlers/FxFxLHReader:QNumbers Yes
#set /Herwig/EventHandlers/FxFxLHReader:Decayer /Herwig/Decays/Mambo
##################################################
# Shower parameters #
##################################################
# normally, especially for POWHEG, you want
# the scale supplied in the event files (SCALUP)
# to be used as a pT veto scale in the parton shower
set /Herwig/Shower/ShowerHandler:MaxPtIsMuF Yes
set /Herwig/Shower/ShowerHandler:RestrictPhasespace Yes
# Shower parameters
# treatment of wide angle radiation
set /Herwig/Shower/PartnerFinder:PartnerMethod Random
set /Herwig/Shower/PartnerFinder:ScaleChoice Partner
# with MC@NLO these parameters are required for consistency of the subtraction terms
set /Herwig/Shower/KinematicsReconstructor:InitialInitialBoostOption LongTransBoost
set /Herwig/Shower/KinematicsReconstructor:ReconstructionOption General
set /Herwig/Shower/KinematicsReconstructor:InitialStateReconOption Rapidity
set /Herwig/Shower/ShowerHandler:SpinCorrelations No
#############################################################
# Set up the FxFxHandler #
#############################################################
cd /Herwig/Shower
set /Herwig/Shower/FxFxHandler:MPIHandler /Herwig/UnderlyingEvent/MPIHandler
set /Herwig/Shower/FxFxHandler:RemDecayer /Herwig/Partons/RemnantDecayer
set /Herwig/Shower/FxFxHandler:ShowerAlpha AlphaQCD
# set the heavy quark decay product vetoing process on/off
set FxFxHandler:HeavyQVeto Yes
# Automatic detection of the hard process (experimental)
set FxFxHandler:HardProcessDetection Automatic
# No. of light jets in maximum-multiplicity FxFx process
set FxFxHandler:njetsmax MAXIMUM_NUMBER_OF_PARTONS_IN_LHE_FILE # Make sure this is set correctly!
# Mimimum parton-parton R-sep used for generation.
set FxFxHandler:drjmin 0
# Recommended key merging parameters below
cd /Herwig/Shower
# turn the Vetoing On or Off completely
set FxFxHandler:VetoIsTurnedOff VetoingIsOn
# merging mode: in this case FxFx:
set FxFxHandler:MergeMode FxFx
# merging scale
set FxFxHandler:ETClus 20*GeV
# jet radius used in clustering in merging.
set FxFxHandler:RClus 1.0
# Max |eta| for jets in clustering in merging.
set FxFxHandler:EtaClusMax 10
# Default 1.5 factor used to decide if a jet matches a parton
# in merging: if DR(parton,jet)<rclusfactor*rclus the parton
# and jet are said to have been matched.
set FxFxHandler:RClusFactor 1.5
##################################################
# LHC physics parameters (override defaults here)
##################################################
# e.g if different top mass used
#set /Herwig/Particles/t:NominalMass 173.0
##################################################
# Save run for later usage with 'Herwig run'
##################################################
cd /Herwig/Generators
saverun LHE-FxFx EventGenerator
File Metadata
Details
Attached
Mime Type
text/plain
Expires
Wed, May 14, 10:45 AM (1 d, 8 h)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
5109072
Default Alt Text
LHE-FxFx.in (6 KB)
Attached To
R563 testingHerwigHG
Event Timeline
Log In to Comment