00001 # The standad settings for ATLAS
00002 # stolen from EvgenJobOptions/share/MC8_Pythia_Common.py
00003
00004 # mass
00005 # PDG2007 TOP mass
00006 pydat2 pmas 6 1 172.5
00007 # PDG2007 W mass
00008 pydat2 pmas 24 1 80.403
00009 # PDG2007 W width
00010 pydat2 pmas 24 2 2.141
00011 # PDG2007 Z0 mass
00012 pydat2 pmas 23 1 91.1876
00013 # PDG2007 Z0 width
00014 pydat2 pmas 23 2 2.4952
00015
00016 # misc
00017 # fix junk output for documentary particles
00018 pypars mstp 128 1
00019 # prevent Pythia from exiting when it exceeds its errors limit
00020 pydat1 mstu 21 1
00021
00022 # main switch
00023 # treatment for MI, ISR, FSR and beam remnants: MI on, new model
00024 pypars mstp 81 21
00025 # multiple interaction model: double Gaussian matter dist
00026 pypars mstp 82 4
00027
00028 # U.E. main switches
00029 # (was 2: def manual 1, def code 0) virtuality scale for ISR
00030 pypars mstp 70 0
00031 # (was 0: def 1) maximum scale for FSR
00032 pypars mstp 72 1
00033 # (was 0: def 1) strategy for qq junction to di-quark or baryon in beam remnant
00034 pypars mstp 88 1
00035 # (was 1: def 0) strategy of compensate the primordial kT
00036 pypars mstp 90 0
00037
00038 # U.E. tuning parameters
00039 # the amount of color reconnection in the final state
00040 pypars parp 78 0.3
00041 # probability of color partons kicked out from beam remnant
00042 pypars parp 80 0.1
00043 # cut off scale
00044 pypars parp 82 2.1
00045 # matter distribution
00046 pypars parp 83 0.8
00047 # matter distribution
00048 pypars parp 84 0.7
00049 # exponent of energy dependence
00050 pypars parp 90 0.16
00051 # (was 0.14: def 0.29) Labmda value in running alpha_s for parton showers
00052 pydat1 parj 81 0.29
00053 # (was 1; def 1) minimize the total string length
00054 #pypars mstp 95 1
00055 pypars mstp 95 2
00056
00057 # Fragmentation
00058 # hybrid: Peterson for c/b, symmetric Lund for lightq
00059 pydat1 mstj 11 3
00060 # Make K_s, Lambda stable, ctau up to 10mm
00061 pydat1 mstj 22 2
00062 # c hadronization
00063 pydat1 parj 54 -0.07
00064 # b hadronization
00065 pydat1 parj 55 -0.006
00066
00067 # Others (redundant: just overwriting hard coded
00068 # parameters, anyway they are Pythia default)
00069 pypars mstp 84 1
00070 pypars mstp 85 1
00071 pypars mstp 86 2
00072 pypars mstp 87 4
00073 pypars mstp 89 1
00074 pypars parp 89 1800.
