def makeGenEvents( genName = "Pythia",
genProcess = "ttbar",
cfgGenName = "EvGen" ):
"""
Little helper method to provide a quick way to produce Mc-events
"""
msg = logging.getLogger( "McParticleTests" )
if genName.lower() not in [ "pythia", "herwig" ]:
raise RuntimeError ("Unknown GENERATOR [%s]" % str(genName))
if genProcess not in ["ttbar", "HiggsTo4Leptons", "Z+j"]:
raise RuntimeError ("Unknown PROCESS [%s]" % str(genProcess))
if genName.lower() == "pythia":
try:
from Pythia_i.Pythia_iConf import Pythia
except ImportError as err:
msg.warning( "Could not load module Pythia_iConf" )
raise err
genAlg = Pythia(cfgGenName)
genAlg.Tune_Name='ATLAS_20110103'
if genProcess == "Z+j":
genAlg.PythiaCommand = [ "pysubs msel 13",
"pysubs ckin 3 18.",
"pypars mstp 43 2" ]
elif genProcess == "ttbar":
# semi-leptonic decay of a ttbar pair (lepton=e,mu)
genAlg.PythiaCommand = [
"pysubs msel 6",
"pysubs ckin 3 18.",
"pypars mstp 43 2",
# Customisation of subprocess generation
"pysubs msub 81 1", # qqbar -> QQbar
"pysubs msub 82 1", # gq -> QQbar
"pysubs msub 96 1", # SemiHard QCD 2 -> 2
# top
"pydat3 mdme 41 1 0", # gt
"pydat3 mdme 42 1 0", # gamma t
"pydat3 mdme 43 1 0", # Z0 t
"pydat3 mdme 44 1 0", # W+ d
"pydat3 mdme 45 1 0", # W+ s
"pydat3 mdme 46 1 1", # W+ b
"pydat3 mdme 47 1 0", # W+ b'
"pydat3 mdme 48 1 0", # h0 t
"pydat3 mdme 49 1 0", # H+ b
"pydat3 mdme 50 1 0", # ~chi_10 ~t_1
"pydat3 mdme 51 1 0", # ~chi_20 ~t_1
"pydat3 mdme 52 1 0", # ~chi_30 ~t_1
"pydat3 mdme 53 1 0", # ~chi_40 ~t_1
"pydat3 mdme 54 1 0", # ~g ~t_1
"pydat3 mdme 55 1 0", # ~gravitino ~t_1
# W
"pydat3 mdme 190 1 2", # dbar u
"pydat3 mdme 191 1 2", # dbar c
"pydat3 mdme 192 1 2", # dbar t
"pydat3 mdme 193 1 0", # dbar t'
"pydat3 mdme 194 1 2", # sbar u
"pydat3 mdme 195 1 2", # sbar c
"pydat3 mdme 196 1 2", # sbar t
"pydat3 mdme 197 1 0", # sbar t'
"pydat3 mdme 198 1 2", # bbar u
"pydat3 mdme 199 1 2", # bbar c
"pydat3 mdme 200 1 2", # bbar t
"pydat3 mdme 201 1 0", # bbar t'
"pydat3 mdme 202 1 0", # b'bar u
"pydat3 mdme 203 1 0", # b'bar c
"pydat3 mdme 204 1 0", # b'bar t
"pydat3 mdme 205 1 0", # b'bar t'
"pydat3 mdme 206 1 0", # e+ nu_e
"pydat3 mdme 207 1 3", # mu+ nu_mu
"pydat3 mdme 208 1 0", # tau+ nu_tau
"pydat3 mdme 209 1 0" # tau'+ nu'_tau
]
elif genProcess == "HiggsTo4Leptons":
genAlg.PythiaCommand = [
# Higgs mass set:
"pydat2 pmas 25 1 150.",
# Select Higgs production
"pysubs msel 16",
# Higgs Decays
"pydat3 mdme 210 1 0",
"pydat3 mdme 211 1 0",
"pydat3 mdme 212 1 0",
"pydat3 mdme 213 1 0",
"pydat3 mdme 214 1 0",
"pydat3 mdme 215 1 0",
"pydat3 mdme 218 1 0",
"pydat3 mdme 219 1 0",
"pydat3 mdme 220 1 0",
"pydat3 mdme 222 1 0",
"pydat3 mdme 223 1 0",
"pydat3 mdme 224 1 0",
"pydat3 mdme 225 1 1",
"pydat3 mdme 226 1 0",
# Z Decays
"pydat3 mdme 174 1 0",
"pydat3 mdme 175 1 0",
"pydat3 mdme 176 1 0",
"pydat3 mdme 177 1 0",
"pydat3 mdme 178 1 0",
"pydat3 mdme 179 1 0",
"pydat3 mdme 180 1 0",
"pydat3 mdme 181 1 0",
"pydat3 mdme 182 1 1",
"pydat3 mdme 183 1 0",
"pydat3 mdme 184 1 1",
"pydat3 mdme 185 1 0",
"pydat3 mdme 186 1 0",
"pydat3 mdme 187 1 0",
"pydat3 mdme 188 1 0",
"pydat3 mdme 189 1 0"
]
else:
raise RuntimeError ("Unknown PROCESS [%s]" % str(genProcess))
# Some ISR,FSR,MultipleInteractions and Hadronization parameters
genAlg.PythiaCommand += [
"pypars mstp 61 1", # ISR
"pypars mstp 71 1", # FSR
"pypars mstp 81 1", # MultInt
"pypars mstp 111 1", # Hadronization
]
# Pythia listing documentation level (0-1-2)
genAlg.PythiaCommand += [ "pypars mstp 125 2" ]
elif genName.lower() == "herwig":
try:
from Herwig_i.Herwig_iConf import Herwig
except ImportError as err:
msg.warning( "Could not load module Herwig_iConf" )
raise err
genAlg = Herwig(cfgGenName)
if genProcess == "Z+j":
genAlg.HerwigCommand = [
"iproc 2150",
"modpdf 10042",
"autpdf HWLHAPDF"
]
elif genProcess == "ttbar":
genAlg.HerwigCommand = ["iproc 1706","modpdf 10042",
"autpdf HWLHAPDF" ]
else:
raise RuntimeError ("Unknown PROCESS [%s]" % str(genProcess))
pass
else:
raise RuntimeError ("Unknown GENERATOR [%s]" % str(genName))
return genAlg
uetune = 1
#####--------- Min_bias
if selector == "min_bias":
Pythia.Tune_Name = "ATLAS_20080001"
Pythia.PythiaCommand = [
"pysubs msel 1", #pre-programmed processes
"pyinit win 14000.",
## #"pypars mstp 2 2", #second order running alpha_s
## #"pypars mstp 33 3", #K-factors
## #"pysubs ckin 13 -0.1.", #low limit of the highest rapidity
## #"pysubs ckin 14 0.1.", #hight limit of the highest rapidity
## #"pysubs ckin 15 -0.1.", #low limit of the smallest rapidity
## #"pysubs ckin 16 0.1.", #hight limit of the smallest rapidity
#"pypars mstp 81 1", #multiple interaction on
#"pypars mstp 82 4", #impact parameter choice
#"pydat1 mstj 11 3", #(D=4), fragementation=hybrid scheme
#"pydat1 mstj 22 2", #(D=1), dist to deacay a part=parj(71)
#"pydat1 parj 54 -0.07", #related to fragmentation
#"pydat1 parj 55 -0.006",#related to fragmentation
#"pypars parp 82 1.8", #PT0 multiple distribution tail
#"pystat 1 3 4 5",
#"pyinit output event_listing.txt",
#"pypars mstp 128 0",
"pypars parp 84 0.5"
] #gaussian distribution mstp(82)=4)
###--------- Z/gamma + jet production
##Pythia.PythiaCommand = [
##-- "pysubs msel 13", #(D=1), user controlled processes selection
## #"pysubs msub 1 1", #Z/gamma process
## #"pypars mstp 43 1", #Z only. D=1=Z/Gamma mixture