/usr/share/HepMC/examples/pythia8/main32.cmnd is in hepmc-examples 2.06.09-1.
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 | ! File: main32.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 = 200 ! number of events to generate
Main:timesToShow = 10 ! show how far along run is this many times
Main:timesAllowErrors = 3 ! abort run after this many flawed events
Main:showChangedSettings = on ! print changed flags/modes/parameters
#Main:showAllSettings = on ! print all flags/modes/parameters
Main:showChangedParticleData = on ! print changed particle and decay data
#Main:showAllParticleData = on ! print all particle and decay data
! 2) 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 = 14000. ! CM energy of collision
! 3) Pick processes and kinematics cuts.
Charmonium:gg2QQbar[3S1(1)]g = on ! colour singlet charmonium production
Charmonium:gg2QQbar[3P0(1)]g = on ! "
Charmonium:gg2QQbar[3P1(1)]g = on ! "
Charmonium:gg2QQbar[3P2(1)]g = on ! "
PhaseSpace:pTHatMin = 20. ! minimum pT of hard process
! 4) Alternative beam and process selection from a Les Houches Event File.
! NOTE: to use this option, comment out the lines in section 3 above
! and uncomment the ones below. Section 2 is ignored for frameType = 4.
#Beams:frameType = 4 ! read info from a LHEF
#Beams:LHEF = ttbar.lhe ! the LHEF to read from
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