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source_ZtoJets_cfi.py
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2 
3 source = cms.Source("PythiaSource",
4  pythiaVerbosity = cms.untracked.bool(False),
5  PythiaParameters = cms.PSet(
6  pythiaZtt = cms.vstring('MSEL = 11 ',
7  'MDME( 174,1) = 1 !Z decay into d dbar',
8  'MDME( 175,1) = 0 !Z decay into u ubar',
9  'MDME( 176,1) = 0 !Z decay into s sbar',
10  'MDME( 177,1) = 0 !Z decay into c cbar',
11  'MDME( 178,1) = 0 !Z decay into b bbar',
12  'MDME( 179,1) = 0 !Z decay into t tbar',
13  'MDME( 182,1) = 0 !Z decay into e- e+',
14  'MDME( 183,1) = 0 !Z decay into nu_e nu_ebar',
15  'MDME( 184,1) = 0 !Z decay into mu- mu+',
16  'MDME( 185,1) = 0 !Z decay into nu_mu nu_mubar',
17  'MDME( 186,1) = 0 !Z decay into tau- tau+',
18  'MDME( 187,1) = 0 !Z decay into nu_tau nu_taubar',
19  'MSTJ( 11) = 3 !Choice of the fragmentation function',
20  'MSTP( 2) = 1 !which order running alphaS',
21  'MSTP( 33) = 0 !(D=0) ',
22  'MSTP( 51) = 7 !structure function chosen',
23  'MSTP( 81) = 1 !multiple parton interactions 1 is Pythia default',
24  'MSTP( 82) = 4 !Defines the multi-parton model',
25  'PARJ( 71) = 10. !for which ctau 10 mm',
26  'PARP( 82) = 1.9 !pt cutoff for multiparton interactions',
27  'PARP( 89) = 1000. !sqrts for which PARP82 is set',
28  'PARP( 83) = 0.5 !Multiple interactions: matter distrbn parameter',
29  'PARP( 84) = 0.4 !Multiple interactions: matter distribution parameter',
30  'PARP( 90) = 0.16 !Multiple interactions: rescaling power',
31  'CKIN( 1) = 40. !(D=2. GeV)',
32  'CKIN( 2) = -1. !(D=-1. GeV)',
33  'MDME(89,1)=0 ! no tau->electron',
34  'MDME(90,1)=0 ! no tau->muon'),
35  parameterSets = cms.vstring('pythiaZtt')
36  )
37 )
38 
39