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 changes here are illustrative, not always physics-motivated.
7 ! 1) Settings that will be used in a main program.
8 Main:numberOfEvents = 200 ! number of events to generate
9 Main:timesAllowErrors = 3 ! abort run after this many flawed events
11 ! 2) Settings related to output in init(), next() and stat().
12 Init:showChangedSettings = on ! list changed settings
13 Init:showAllSettings = off ! list all settings
14 Init:showChangedParticleData = on ! list changed particle data
15 Init:showAllParticleData = off ! list all particle data
16 Next:numberCount = 1000 ! print message every n events
17 Next:numberShowLHA = 1 ! print LHA information n times
18 Next:numberShowInfo = 1 ! print event information n times
19 Next:numberShowProcess = 1 ! print process record n times
20 Next:numberShowEvent = 1 ! print event record n times
21 Stat:showPartonLevel = on ! additional statistics on MPI
23 ! 3) Beam parameter settings. Values below agree with default ones.
24 Beams:idA = 2212 ! first beam, p = 2212, pbar = -2212
25 Beams:idB = 2212 ! second beam, p = 2212, pbar = -2212
26 Beams:eCM = 14000. ! CM energy of collision
28 ! 4a) Pick processes and kinematics cuts.
29 Charmonium:gg2QQbar[3S1(1)]g = on ! colour singlet charmonium production
30 Charmonium:gg2QQbar[3P0(1)]g = on ! "
31 Charmonium:gg2QQbar[3P1(1)]g = on ! "
32 Charmonium:gg2QQbar[3P2(1)]g = on ! "
33 PhaseSpace:pTHatMin = 20. ! minimum pT of hard process
35 ! 4b) Alternative beam and process selection from a Les Houches Event File.
36 ! NOTE: to use this option, comment out the lines in section 4a above
37 ! and uncomment the ones below. Section 3 is ignored for frameType = 4.
38 #Beams:frameType = 4 ! read info from a LHEF
39 #Beams:LHEF = ttbar.lhe ! the LHEF to read from
41 ! 5) Other settings. Can be expanded as desired.
42 ! Note: may overwrite some of the values above, so watch out.
43 #Tune:pp = 6 ! use Tune 4Cx
44 #ParticleDecays:limitTau0 = on ! set long-lived particle stable ...
45 #ParticleDecays:tau0Max = 10 ! ... if c*tau0 > 10 mm