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 settings here are illustrative, not always physics-motivated.
7 ! Number of events - use 0 for all LHEF events in the input file.
8 Main:numberOfEvents = 0
10 ! Number of events to list and number of errors to allow.
11 Next:numberShowLHA = 1
12 Next:numberShowInfo = 1
13 Next:numberShowProcess = 1
14 Next:numberShowEvent = 1
15 Main:timesAllowErrors = 10
17 ! List changed settings or particle data.
18 Init:showChangedSettings = on
19 Init:showChangedParticleData = off
23 ! t tbar pair production.
24 #Beams:LHEF = powheg-hvq.lhe
25 ! QCD 2- and 3-jet events.
26 Beams:LHEF = powheg-dijets.lhe
28 ! Number of outgoing particles of POWHEG Born level process
29 ! (i.e. not counting additional POWHEG radiation)
32 ! How vetoing is performed:
33 ! 0 - No vetoing is performed (userhooks are not loaded)
34 ! 1 - Showers are started at the kinematical limit.
35 ! Emissions are vetoed if pTemt > pThard.
36 ! See also POWHEG:vetoCount below
39 ! After 'vetoCount' accepted emissions in a row, no more emissions
40 ! are checked. 'vetoCount = 0' means all emissions are checked.
43 ! Selection of pThard (note, for events where there is no
44 ! radiation, pThard is always set to be Q_fac):
46 ! 1 - the pT of the POWHEG emission is tested against all other
47 ! incoming and outgoing partons, with the minimal value chosen
48 ! 2 - the pT of all final-state partons is tested against all other
49 ! incoming and outgoing partons, with the minimal value chosen
53 ! 0 - pTemt is pT of the emitted parton w.r.t. radiating parton
54 ! 1 - pT of the emission is checked against all incoming and outgoing
55 ! partons. pTemt is set to the minimum of these values
56 ! 2 - the pT of all final-state partons is tested against all other
57 ! incoming and outgoing partons, with the minimal value chosen
60 ! Selection of emitted parton for FSR
61 ! 0 - Pythia definition of emitted
62 ! 1 - Pythia definition of radiator
63 ! 2 - Random selection of emitted or radiator
64 ! 3 - Both are emitted and radiator are tried
68 ! 0 - POWHEG ISR pT definition is used for both ISR and FSR
69 ! 1 - POWHEG ISR pT and FSR d_ij definitions
70 ! 2 - Pythia definitions
74 ! 0 - No MPI vetoing is done
75 ! 1 - When there is no radiation, MPIs with a scale above pT_1 are vetoed,
76 ! else MPIs with a scale above (pT_1 + pT_2 + pT_3) / 2 are vetoed
79 ! Further options (optional, for tryout)