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Adding ALICE 3 Pb-Pb generator with forced D0 decays #2033

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Merged
njacazio merged 1 commit into from
Jun 16, 2025
Merged

Adding ALICE 3 Pb-Pb generator with forced D0 decays #2033

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9 changes: 9 additions & 0 deletions MC/config/ALICE3/ini/pythia8_PbPb_D0toKpi.ini
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[Diamond]
width[2]=6.0

[GeneratorExternal]
fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/ALICE3/pythia8/generator_pythia8_ALICE3.C
funcName=generator_pythia8_ALICE3()

[GeneratorPythia8]
config=${O2DPG_MC_CONFIG_ROOT}/MC/config/ALICE3/pythia8/generator/pythia8_PbPb_D0toKpi.cfg
20 changes: 20 additions & 0 deletions MC/config/ALICE3/pythia8/generator/pythia8_PbPb_D0toKpi.cfg
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### Specify beams
Beams:idA = 1000822080
Beams:idB = 1000822080
Beams:eCM = 5520.0 ### energy

Beams:frameType = 1
ParticleDecays:limitTau0 = on
ParticleDecays:tau0Max = 10. ### match alice: 1cm/c = 10.0mm/c

### Initialize the Angantyr model to fit the total and semi-includive
### cross sections in Pythia within some tolerance.
HeavyIon:SigFitErr = 0.02,0.02,0.1,0.05,0.05,0.0,0.1,0.0

### These parameters are typicall suitable for sqrt(S_NN)=5TeV
HeavyIon:SigFitDefPar = 17.24,2.15,0.33,0.0,0.0,0.0,0.0,0.0

### Force decay of D0 into Kpi
421:oneChannel = 1 0.0389 0 -321 211

Random:setSeed = on