2 ! This file contains commands to be read in for a Pythia8 run.
3 ! Lines not beginning with a letter or digit are comments.
5 ! 1) Settings that could be used in a main program, if desired.
6 Main:numberOfEvents = 1000 ! number of events to generate
7 Main:numberToList = 1 ! number of events to print
8 Main:timesToShow = 20 ! show how far along run is
9 Main:timesAllowErrors = 3 ! how many aborts before run stops
10 Main:showChangedSettings = on ! print changed flags/modes/parameters
11 Main:showAllSettings = off ! print all flags/modes/parameters
13 ! 2) Beam parameter settings. Values below agree with default ones.
14 Beams:idA = 2212 ! first beam, p = 2212, pbar = -2212
15 Beams:idB = 2212 ! second beam, p = 2212, pbar = -2212
16 Beams:eCM = 14000. ! CM energy of collision
18 ! 3) Settings for the hard-process generation.
19 ! Example 1: QCD production; must set pTmin.
20 #HardQCD:all = on ! switch on all QCD jet + jet processes
21 #PhaseSpace:pTHatMin = 20. ! minimal pT sacale in process
22 ! Example 2: t-tbar production.
23 Top:gg2ttbar = on ! g g -> t tbar
24 Top:qqbar2ttbar = on ! q qbar -> t tbar
25 ! Example 3: Z0 production; should set mMin.
26 #WeakSingleBoson:ffbar2gmZ = on ! q qbar -> gamma*/Z0
27 #PhaseSpace:mHatMin = 50.
28 ! Example 4: gauge boson pair production; set pTmin. Not yet complete.
29 #WeakDoubleBoson:ffbar2ZW ! q qbar -> Z0 W+-
30 #WeakDoubleBoson:ffbar2WW ! q qbar -> W+ W-
32 ! 4) Settings for the event generation process in the Pythia8 library.
33 #PartonLevel:MI = off ! no multiple interactions
34 #PartonLevel:ISR = off ! no initial-state radiation
35 #PartonLevel:FSR = off ! no final-state radiation
36 #HadronLevel:Hadronize = off ! no hadronization
37 #HadronLevel:Decay = off ! no decays
39 ! 5) Non-standard settings; exemplifies tuning possibilities.
40 #SpaceShower:pT0Ref = 2.0 ! dampening of pT -> 0 divergence
41 #MultipleInteractions:pT0Ref = 3.0 ! dampening of pT -> 0 divergence