/usr/share/pythia8-examples/examples/main31.cmnd is in pythia8-examples 8.1.86-1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 | ! main31.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 settings here are illustrative, not always physics-motivated.
! You should carefully consider what changes need be done for the
! process you study currently, and consider some of the options
! as reasonable measures of uncertainties in the matching process.
! Number of events - use 0 for all LHEF events in the input file.
Main:numberOfEvents = 0
! Number of events to list and number of errors to allow.
Next:numberShowLHA = 1
Next:numberShowInfo = 1
Next:numberShowProcess = 1
Next:numberShowEvent = 1
Main:timesAllowErrors = 10
! List changed settings or particle data.
Init:showChangedSettings = on
Init:showChangedParticleData = off
! Input file.
Beams:frameType = 4
! t tbar pair production.
#Beams:LHEF = powheg-hvq.lhe
! QCD 2- and 3-jet events.
Beams:LHEF = powheg-dijets.lhe
! Number of outgoing particles of POWHEG Born level process
! (i.e. not counting additional POWHEG radiation)
POWHEG:nFinal = 2
! How vetoing is performed:
! 0 - No vetoing is performed (userhooks are not loaded)
! 1 - Showers are started at the kinematical limit.
! Emissions are vetoed if pTemt > pThard.
! See also POWHEG:vetoCount below
POWHEG:veto = 1
! After 'vetoCount' accepted emissions in a row, no more emissions
! are checked. 'vetoCount = 0' means all emissions are checked.
POWHEG:vetoCount = 3
! Selection of pThard (note, for events where there is no
! radiation, pThard is always set to be SCALUP):
! 0 - pThard = SCALUP (of the LHA/LHEF standard)
! 1 - the pT of the POWHEG emission is tested against all other
! incoming and outgoing partons, with the minimal value chosen
! 2 - the pT of all final-state partons is tested against all other
! incoming and outgoing partons, with the minimal value chosen
POWHEG:pThard = 2
! Selection of pTemt:
! 0 - pTemt is pT of the emitted parton w.r.t. radiating parton
! 1 - pT of the emission is checked against all incoming and outgoing
! partons. pTemt is set to the minimum of these values
! 2 - the pT of all final-state partons is tested against all other
! incoming and outgoing partons, with the minimal value chosen
! WARNING: the choice here can give significant variations in the final
! distributions, notably in the tail to large pT values.
POWHEG:pTemt = 0
! Selection of emitted parton for FSR
! 0 - Pythia definition of emitted
! 1 - Pythia definition of radiator
! 2 - Random selection of emitted or radiator
! 3 - Both are emitted and radiator are tried
POWHEG:emitted = 0
! pT definitions
! 0 - POWHEG ISR pT definition is used for both ISR and FSR
! 1 - POWHEG ISR pT and FSR d_ij definitions
! 2 - Pythia definitions
POWHEG:pTdef = 1
! MPI vetoing
! 0 - No MPI vetoing is done
! 1 - When there is no radiation, MPIs with a scale above pT_1 are vetoed,
! else MPIs with a scale above (pT_1 + pT_2 + pT_3) / 2 are vetoed
POWHEG:MPIveto = 0
! Further options (optional, for tryout)
!PartonLevel:MPI = off
!HadronLevel:All = off
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