command.cmnd

! File: main42.cmnd
! This file contains commands to be read in for a Pythia8 run.
! Lines not beginning with a letter or digit are comments.
! Names are case-insensitive  -  but spellings-sensitive!
! The changes here are illustrative, not always physics-motivated.

! 1) Settings that will be used in a main program.
Main:numberOfEvents = 1000000           ! number of events to generate
Main:timesAllowErrors = 30          ! abort run after this many flawed events

Random:setSeed = on
Random:seed = 0

! 2) Settings related to output in init(), next() and stat().
Init:showChangedSettings = on      ! list changed settings
Init:showAllSettings = off         ! list all settings
Init:showChangedParticleData = on  ! list changed particle data
Init:showAllParticleData = off     ! list all particle data
Next:numberCount = 1000            ! print message every n events
Next:numberShowLHA = 1             ! print LHA information n times
Next:numberShowInfo = 1            ! print event information n times
Next:numberShowProcess = 1         ! print process record n times
Next:numberShowEvent = 1           ! print event record n times
Stat:showPartonLevel = on          ! additional statistics on MPI

! 3) Beam parameter settings. Values below agree with default ones.
Beams:idA = 2212                   ! first beam, p = 2212, pbar = -2212
Beams:idB = 2212                   ! second beam, p = 2212, pbar = -2212
Beams:eCM = 2760.                 ! CM energy of collision

! 4) PDF settings. Default is to use internal PDFs
! some pdf sets examples: cteq61.LHpdf cteq61.LHgrid MRST2004nlo.LHgrid
#PDF:pSet = LHAPDF5:MRST2001lo.LHgrid
! Allow extrapolation of PDF's beyond x and Q2 boundaries, at own risk.
! Default behaviour is to freeze PDF's at boundaries.
#PDF:extrapolate = on

! 5a) Pick processes and kinematics cuts.
! Colour singlet charmonium production of J/psi and chi_c.
SoftQCD:all             = on
HardQCD:all             = on
PromptPhoton:all        = on
WeakBosonExchange:all   = on
WeakSingleBoson:all     = on
WeakDoubleBoson:all     = on
WeakBosonAndParton:all  = on

Charmonium:gg2ccbar(3S1)[3S1(1)]g    = on,off
Charmonium:gg2ccbar(3PJ)[3PJ(1)]g    = on,on,on
Charmonium:qg2ccbar(3PJ)[3PJ(1)]q    = on,on,on
Charmonium:qqbar2ccbar(3PJ)[3PJ(1)]g = on,on,on
PhaseSpace:pTHatMin = 20.          ! minimum pT of hard process

! 5b) Alternative beam and process selection from a Les Houches Event File.
! NOTE: to use this option, comment out the lines in section 5a above
! and uncomment the ones below. Section 3 is ignored for frameType = 4.
#Beams:frameType = 4                ! read info from a LHEF
#Beams:LHEF = ttbar.lhe             ! the LHEF to read from

! 6) Other settings. Can be expanded as desired.
! Note: may overwrite some of the values above, so watch out.
Tune:pp = 14                        ! use Tune 4Cx
Tune:ee = 7
ParticleDecays:limitTau0 = on      ! set long-lived particle stable ...
#ParticleDecays:tau0Max = 10        ! ... if c*tau0 > 10 mm