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