################################################################################ # This file contains tunes to UE data from CDF and ATLAS at 900 GeV, # 1.8 TeV and 7.0 TeV. Moreover, we provide a suggestion for 2.76 TeV # runs, which extrapolates between other tunes. # # NOTE: You have to choose the desired center-of-mass energy at two # places in this file! Please read the instructions below carefully. # # More information and instructions can be obtained from this Herwig++ # wiki page: http://projects.hepforge.org/herwig/trac/wiki/MB_UE_tunes ################################################################################ ################################################## # Technical parameters for this run ################################################## cd /Herwig/Generators set LHCGenerator:NumberOfEvents 10000000 set LHCGenerator:RandomNumberGenerator:Seed 31122001 set LHCGenerator:PrintEvent 10 set LHCGenerator:MaxErrors 1000000 set LHCGenerator:DebugLevel 0 set LHCGenerator:DumpPeriod -1 set LHCGenerator:DebugEvent 0 ################################################## # LHC physics parameters (override defaults here) ################################################## ################################################################################ # NOTE: Set here the correct parameters for the collision energy of your # choice. This line will cause an error. Please make a valid choice for the # center-of-mass energy by choosing one of the given examples. ################################################################################ # Set collison energy (in GeV). set LHCGenerator:EventHandler:LuminosityFunction:Energy -1 # For example: #set LHCGenerator:EventHandler:LuminosityFunction:Energy 900.0 #set LHCGenerator:EventHandler:LuminosityFunction:Energy 1800.0 #set LHCGenerator:EventHandler:LuminosityFunction:Energy 2760.0 #set LHCGenerator:EventHandler:LuminosityFunction:Energy 7000.0 ################################################## # Override default MPI parameters ################################################## # Colour reconnection settings set /Herwig/Hadronization/ColourReconnector:ColourReconnection Yes set /Herwig/Hadronization/ColourReconnector:ReconnectionProbability 0.55 # Colour Disrupt settings set /Herwig/Partons/RemnantDecayer:colourDisrupt 0.15 # inverse hadron radius set /Herwig/UnderlyingEvent/MPIHandler:InvRadius 1.1 ################################################################################ # NOTE: Set the correct parameters depending on the collision energy here. # The following lines will cause an error. Replace them by the respective line # given below, which match to the chosen collision energy. ################################################################################ # Min KT parameter set /Herwig/UnderlyingEvent/KtCut:MinKT -1 # This should always be 2*MinKT!! set /Herwig/UnderlyingEvent/UECuts:MHatMin -1 ### for \sqrt(s) = 900 GeV #set /Herwig/UnderlyingEvent/KtCut:MinKT 2.34 #set /Herwig/UnderlyingEvent/UECuts:MHatMin 4.68 ### for \sqrt(s) = 1800 GeV #set /Herwig/UnderlyingEvent/KtCut:MinKT 3.09 #set /Herwig/UnderlyingEvent/UECuts:MHatMin 6.18 ### for \sqrt(s) = 2760 GeV #set /Herwig/UnderlyingEvent/KtCut:MinKT 3.31 #set /Herwig/UnderlyingEvent/UECuts:MHatMin 6.62 ### for \sqrt(s) = 7000 GeV #set /Herwig/UnderlyingEvent/KtCut:MinKT 4.02 #set /Herwig/UnderlyingEvent/UECuts:MHatMin 8.04 ################################################## # Matrix Elements for hadron-hadron collisions ################################################## cd /Herwig/MatrixElements/ insert SimpleQCD:MatrixElements[0] MEMinBias # Need this cut only for min bias cd /Herwig/Cuts set JetKtCut:MinKT 0.0*GeV set QCDCuts:MHatMin 0.0*GeV set QCDCuts:X1Min 0.01 set QCDCuts:X2Min 0.01 # MPI model settings set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0 set /Herwig/UnderlyingEvent/MPIHandler:softInt Yes set /Herwig/UnderlyingEvent/MPIHandler:twoComp Yes set /Herwig/UnderlyingEvent/MPIHandler:DLmode 3 cd /Herwig/Generators #insert LHCGenerator:AnalysisHandlers 0 /Herwig/Analysis/HepMCFile #set /Herwig/Analysis/HepMCFile:PrintEvent 1000000 #set /Herwig/Analysis/HepMCFile:Format GenEvent #set /Herwig/Analysis/HepMCFile:Units GeV_mm #set /Herwig/Analysis/HepMCFile:Filename events.fifo ################################################## # Save run for later usage with 'Herwig++ run' ################################################## saverun LHC-UE-EE-2 LHCGenerator