diff --git a/src/snippets/MB.in b/src/snippets/MB.in --- a/src/snippets/MB.in +++ b/src/snippets/MB.in @@ -1,47 +1,55 @@ ################################################## # MEMinBias Matrix Element ################################################## # MPI model settings set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0 ## Report the correct cross section cd /Herwig/Generators create Herwig::MPIXSecReweighter MPIXSecReweighter insert EventGenerator:EventHandler:PostSubProcessHandlers 0 MPIXSecReweighter set EventGenerator:EventHandler:CascadeHandler NULL clear EventGenerator:EventHandler:SubProcessHandlers[0] ################################################## # Create separate SubProcessHandler for MinBias ################################################## cd /Herwig/MatrixElements/ cp SubProcess QCDMinBias set QCDMinBias:CascadeHandler /Herwig/Shower/ShowerHandler set QCDMinBias:CascadeHandler:MPIHandler /Herwig/UnderlyingEvent/MPIHandler set QCDMinBias:DecayHandler /Herwig/Decays/DecayHandler # Due to numerics the pomeron could be seen as timelike. set /Herwig/Shower/ShowerHandler:SplitHardProcess No set /Herwig/DipoleShower/DipoleShowerHandler:SplitHardProcess No insert QCDMinBias:MatrixElements[0] MEMinBias cd /Herwig/Generators # MinBias parameters used for the new kinematics of soft MPI set /Herwig/Cuts/MinBiasCuts:X1Min 0.011 set /Herwig/Cuts/MinBiasCuts:X2Min 0.011 +#PDFs for MPI,Underlying Event, Min Bias +# set the correct PDFs +cd /Herwig/Partons +set HardLOPDF:PDFName CT14lo +set ShowerLOPDF:PDFName CT14lo +set MPIPDF:PDFName CT14lo +set RemnantPDF:PDFName CT14lo + # Needed to get the correct fraction of diffractive events set /Herwig/MatrixElements/MEMinBias:csNorm 0.01 set /Herwig/MatrixElements/MEMinBias:Scale 2.0 set EventGenerator:EventHandler:Cuts /Herwig/Cuts/MinBiasCuts cd /Herwig/MatrixElements/ insert /Herwig/Generators/EventGenerator:EventHandler:SubProcessHandlers[0] QCDMinBias