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! File: main61.cmnd
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! This file contains commands to be read in for a Pythia8 run.
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! Lines not beginning with a letter or digit are comments.
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! Names are case-insensitive - but spellings-sensitive!
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! The changes here are illustrative, not always physics-motivated.
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! 1) Settings that will be used in a main program.
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Main:numberOfEvents = 250000 ! number of events to generate
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Main:timesAllowErrors = 3000 ! abort run after this many flawed events
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! 2) Settings related to output in init(), next() and stat().
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Init:showChangedSettings = on ! list changed settings
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Init:showAllSettings = off ! list all settings
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Init:showChangedParticleData = on ! list changed particle data
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Init:showAllParticleData = off ! list all particle data
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Next:numberCount = 1000 ! print message every n events
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Next:numberShowLHA = 1 ! print LHA information n times
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Next:numberShowInfo = 1 ! print event information n times
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Next:numberShowProcess = 1 ! print process record n times
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Next:numberShowEvent = 1 ! print event record n times
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Stat:showPartonLevel = on ! additional statistics on MPI
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! 3) Beam parameter settings. Values below agree with default ones.
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Beams:idA = 2212 ! first beam, p = 2212, pbar = -2212
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Beams:idB = 2212 ! second beam, p = 2212, pbar = -2212
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Beams:eCM = 7000. ! CM energy of collision
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! 4) PDF settings. Default is to use internal PDFs
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PDF:useLHAPDF = on
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! some pdf sets examples: cteq61.LHpdf cteq61.LHgrid MRST2004nlo.LHgrid
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PDF:LHAPDFset = MRST2004qed.LHgrid
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! Allow extrapolation of PDF's beyond x and Q2 boundaries, at own risk.
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! Default behaviour is to freeze PDF's at boundaries.
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! PDF:extrapolateLHAPDF = on
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! 5a) Pick processes and kinematics cuts.
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PhotonCollision:gmgm2mumu = on
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! 5b) Alternative beam and process selection from a Les Houches Event File.
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! NOTE: to use this option, comment out the lines in section 5a above
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! and uncomment the ones below. Section 3 is ignored for frameType = 4.
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#Beams:frameType = 4 ! read info from a LHEF
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#Beams:LHEF = ttbar.lhe ! the LHEF to read from
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! 6) Other settings. Can be expanded as desired.
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! Note: may overwrite some of the values above, so watch out.
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#Tune:pp = 6 ! use Tune 4Cx
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#ParticleDecays:limitTau0 = on ! set long-lived particle stable ...
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#ParticleDecays:tau0Max = 10 ! ... if c*tau0 > 10 mm
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