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 # master switch for initial-state QCD and QED radiation; default:2, off:0
00028 pypars mstp 61 2
00029 # master switch for final-state QCD and QED radiation; default:1, off:0
00030 pypars mstp 71 1
00031
00032 # U.E. main switches
00033 # (was 2: def manual 1, def code 0) virtuality scale for ISR
00034 pypars mstp 70 0
00035 # (was 0: def 1) maximum scale for FSR
00036 pypars mstp 72 1
00037 # (was 0: def 1) strategy for qq junction to di-quark or baryon in beam remnant
00038 pypars mstp 88 1
00039 # (was 1: def 0) strategy of compensate the primordial kT
00040 pypars mstp 90 0
00041
00042 # U.E. tuning parameters
00043 # the amount of color reconnection in the final state
00044 pypars parp 78 0.3
00045 # probability of color partons kicked out from beam remnant
00046 pypars parp 80 0.1
00047 # cut off scale
00048 pypars parp 82 2.1
00049 # matter distribution
00050 pypars parp 83 0.8
00051 # matter distribution
00052 pypars parp 84 0.7
00053 # exponent of energy dependence
00054 pypars parp 90 0.16
00055 # (was 0.14: def 0.29) Labmda value in running alpha_s for parton showers
00056 pydat1 parj 81 0.29
00057 # (was 1; def 1) minimize the total string length
00058 #pypars mstp 95 1
00059 #pypars mstp 95 2
00060 pypars mstp 95 6
00061
00062 # Fragmentation
00063 # hybrid: Peterson for c/b, symmetric Lund for lightq
00064 pydat1 mstj 11 3
00065 # Make K_s, Lambda stable, ctau up to 10mm
00066 pydat1 mstj 22 2
00067 # c hadronization
00068 pydat1 parj 54 -0.07
00069 # b hadronization
00070 pydat1 parj 55 -0.006
00071
00072 # Others (redundant: just overwriting hard coded
00073 # parameters, anyway they are Pythia default)
00074 pypars mstp 84 1
00075 pypars mstp 85 1
00076 pypars mstp 86 2
00077 pypars mstp 87 4
00078 pypars mstp 89 1
00079 pypars parp 89 1800.
00080
00081
00082 # Tell Pythia not to write multiple copies of particles in event record.
00083 pypars mstp 128 2
00084
00085 # list of documentation of partonic processes, 1:default, 2: list
00086 # complete documentation of intermediate steps of parton-shower
00087 # evolution
00088 pypars mstp 125 2
