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import FWCore.ParameterSet.Config as cms
herwig7p1SettingsFor7p2Block = cms.PSet(
hw_7p1SettingsFor7p2 = cms.vstring(
# Recoil scheme. Dot product + veto scheme is new default in 7.2
# Q2 was default in 7.1
'read snippets/Tune-Q2.in',
# Baryonic CR is default in 7.2
# Plain CR was used in 7.1 and for CH tunes
'set /Herwig/Hadronization/ColourReconnector:Algorithm Plain',
# Changes energy extrapolation of pt_min
# Default in 7.2 is PowerModified, offset/minimum for low com (200 GeV)
# Power was default in 7.1.
'set /Herwig/UnderlyingEvent/MPIHandler:EnergyExtrapolation Power',
# In 7p2, don't allow MB events to start from sea quarks
# 7p1 allowed this to happen. Has effect/bias on MB distributions (makes them softer)
'set /Herwig/MatrixElements/MEMinBias:OnlyValence 0',
# Soft ladder transverse momentum sampled from gaussian tail below ptmin for first particle
# Remainder are sampled flat below the pt of the first particle
# In 7.1, all particles were sampled from gaussian tail, option 0
'set /Herwig/Partons/RemnantDecayer:PtDistribution 0',
# ladderMult is now constant wrt energy.
# Parametrisation cannot be changed back to energy dependent form in Herwig7.1
# Set to value for 13 TeV from CH3
'set /Herwig/Partons/RemnantDecayer:ladderMult 0.63',
'set /Herwig/Partons/RemnantDecayer:ladderbFactor 0.0',
# Diffraction ratio from CH3 in 7p1
# Taken from log files stating diffractive and non-diffractive cross section
'set /Herwig/UnderlyingEvent/MPIHandler:DiffractiveRatio 0.21',
)
)
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