2 ! This file contains commands to be read in for a Pythia8 run.
3 ! Lines not beginning with a letter or digit are comments.
4 ! Names are case-insensitive - but spellings-sensitive!
5 ! The settings here are illustrative, not always physics-motivated.
7 ! 1) Settings used in the main program.
8 Main:timesAllowErrors = 3 ! how many aborts before run stops
10 ! 2) Settings related to output in init(), next() and stat().
11 Init:showChangedSettings = on ! list changed settings
12 Init:showAllSettings = off ! list all settings
13 Init:showChangedParticleData = on ! list changed particle data
14 Init:showAllParticleData = off ! list all particle data
15 Next:numberCount = 1000 ! print message every n events
16 Next:numberShowLHA = 1 ! print LHA information n times
17 Next:numberShowInfo = 1 ! print event information n times
18 Next:numberShowProcess = 1 ! print process record n times
19 Next:numberShowEvent = 1 ! print event record n times
20 Stat:showPartonLevel = off ! additional statistics on MPI
22 ! 3) PDF settings. Default is to use internal PDFs
24 ! some pdf sets examples: cteq61.LHpdf cteq61.LHgrid MRST2004nlo.LHgrid
25 PDF:LHAPDFset = MRST2001lo.LHgrid
26 ! Allow extrapolation of PDF's beyond x and Q2 boundaries, at own risk.
27 ! Default behaviour is to freeze PDF's at boundaries.
28 PDF:extrapolateLHAPDF = on
30 ! 4) Other common settings.
31 6:m0 = 175. ! same m_t as Pythia 6.4 to compare
32 #ParticleDecays:limitTau0 = on ! set long-lived particle stable ...
33 #ParticleDecays:tau0Max = 10 ! ... if c*tau0 > 10 mm
35 ! 5) The number of subruns to execute.
36 Main:numberOfSubruns = 2
38 ! 6) Information specific to the first subrun
39 Main:subrun = 1 ! matches readFile( ..., 1)
40 Beams:frameType = 4 ! use LHEF input
41 Beams:LHEF = ttbar.lhe ! first LHEF event file
43 ! 7) Information specific to the second subrun
44 Main:subrun = 2 ! matches readFile( ..., 2)
45 Beams:newLHEFsameInit = on ! no reinitialization needed/wanted
46 Beams:LHEF = ttbar2.lhe ! second LHEF event file