AliceO2Group · stefanopolitano · Apr 15, 2025 · Apr 15, 2025 · Apr 15, 2025 · Apr 15, 2025
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+### The external generator derives from GeneratorPythia8.
+[GeneratorExternal]
+fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGHF/external/generator/generator_pythia8_gaptriggered_hf.C
+funcName=GeneratorPythia8GapTriggeredCharmAndBeauty(5, -1.5, 1.5)
+
+[GeneratorPythia8]
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGHF/pythia8/generator/pythia8_charmhadronic_with_decays_CorrBkg.cfg
+includePartonEvent=true
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+### authors: Stefano Politano (stefano.politano@cern.ch)
+### last update:  April 2025
+
+### beams
+Beams:idA 2212			# proton
+Beams:idB 2212 			# proton
+Beams:eCM 13600. 		# GeV
+
+### processes
+SoftQCD:inelastic on		# all inelastic processes
+
+### decays
+ParticleDecays:limitTau0 on	
+ParticleDecays:tau0Max 10.
+
+### switching on Pythia Mode2
+ColourReconnection:mode 1
+ColourReconnection:allowDoubleJunRem off
+ColourReconnection:m0 0.3
+ColourReconnection:allowJunctions on
+ColourReconnection:junctionCorrection 1.20
+ColourReconnection:timeDilationMode 2
+ColourReconnection:timeDilationPar 0.18
+StringPT:sigma 0.335
+StringZ:aLund 0.36
+StringZ:bLund 0.56
+StringFlav:probQQtoQ 0.078
+StringFlav:ProbStoUD 0.2
+StringFlav:probQQ1toQQ0join 0.0275,0.0275,0.0275,0.0275
+MultiPartonInteractions:pT0Ref 2.15
+BeamRemnants:remnantMode 1
+BeamRemnants:saturation 5
+
+# Correct decay lengths (wrong in PYTHIA8 decay table)
+# Lb
+5122:tau0 = 0.4390
+# Xic0
+4132:tau0 = 0.0455
+# OmegaC
+4332:tau0 = 0.0803
+
+### HF decays
+### BR are set to yield the same amount of counts for each final state
+###
+### D0 decays
+421:oneChannel = 1 0.170 0 -321 211             ### D0 -> K- π+
+421:addChannel = 1 0.166 0 -321 211 111         ### D0 -> K- π+ π0
+421:addChannel = 1 0.166 0 -211 211             ### D0 -> π- π+
+421:addChannel = 1 0.166 0 -211 211 111         ### D0 -> π- π+ π0
+421:addChannel = 1 0.166 0 -321 321             ### D0 -> K- K+
+421:addChannel = 1 0.166 0 -321 321 111         ### D0 -> K- K+ π0
+
+### D+ decays
+411:oneChannel = 1 0.17 0 -321 211 211          ### D+ -> K- π+ π+
+411:addChannel = 1 0.33 0 -211 211 211          ### D+ -> π- π+ π+
+411:addChannel = 1 0.17 0  313 211              ### D+ -> K* π+ -> K- π+ π+
+411:addChannel = 1 0.33 0  333 211              ### D+ -> φ π+ -> K- K+ π+
+
+### Ds+ decays
+431:oneChannel = 1 0.125 0  333 211             ### Ds+ -> φ π+ -> K- K+ π+
+431:addChannel = 1 0.125 0  313 321             ### Ds+ -> K* K+ -> K- K+ π+
+431:addChannel = 1 0.250 0 -211 211 211         ### Ds+ -> π- π+ π+
+431:addChannel = 1 0.250 0 -211 321 211         ### Ds+ -> π- K+ π+
+431:addChannel = 1 0.250 0 -321 321 321         ### Ds+ -> K- K+ K+
+
+## Lc decays
+4122:oneChannel = 1 0.0825 0 2212 -321 211      ### Λc+ -> p K- π+
+4122:addChannel = 1 0.0825 100 2212 -313        ### Λc+ -> p K* -> p K- π+
+4122:addChannel = 1 0.0825 100 2224 -321        ### Λc+ -> Delta++ K- -> p K- π+
+4122:addChannel = 1 0.0825 100 102134 211       ### Λc+ -> Lambda(1520) K- -> p K- π+
+4122:addChannel = 1 0.1650 0 2212 211 211       ### Λc+ -> p π+ π+
+4122:addChannel = 1 0.1650 0 2212 311           ### Λc+ -> p K0s -> p π+ π-
+4122:addChannel = 1 0.3300 0 2212 -321 321      ### Λc+ -> p K- K+
+
+### Ξc+ decays
+4232:oneChannel = 1 0.34 0 2212 -321 211        ### Ξc+ -> p K- π+
+4232:addChannel = 1 0.33 0 -3312 211 211        ### Ξc+ -> Ξ- π+ π+
+4232:addChannel = 1 0.33 0 2212 333             ### Ξc+ -> p φ -> p K- K+
+
+# Allow the decay of resonances in the decay chain
+### K* -> K π
+313:onMode = off
+313:onIfAll = 321 211
+### for Ds -> φ π+
+333:onMode = off
+333:onIfAll = 321 321
+### for D0 -> rho0 π+ k-
+113:onMode = off
+113:onIfAll = 211 211
+### for Λc -> Delta++ K-
+2224:onMode = off
+2224:onIfAll = 2212 211
+### for Λc -> Lambda(1520) K-
+102134:onMode = off
+102134:onIfAll = 2212 321
+
+### Switch off all decay channels
+411:onMode = off
+421:onMode = off
+431:onMode = off
+4122:onMode = off
+4232:onMode = off
+
+# Allow the decay of HF
+### D0 -> K π
+421:onIfMatch = 321 211
+### D0 -> K π π0
+421:onIfMatch = 321 211 111
+### D0 -> π π
+421:onIfMatch = 211 211
+### D0 -> π π π0
+421:onIfMatch = 211 211 111
+### D0 -> K K
+421:onIfMatch = 321 321
+### D0 -> K K π0
+421:onIfMatch = 321 321 111
+
+### D+/- -> K π π 
+411:onIfMatch = 321 211 211
+### D+/- -> K* π
+411:onIfMatch = 313 211
+### D+/- -> φ π
+411:onIfMatch = 333 211
+### D+/- -> π π π
+411:onIfMatch = 211 211 211
+
+### Ds -> φ π
+431:onIfMatch = 333 211
+### Ds -> K* K
+431:onIfMatch = 321 313
+### Ds -> π π π
+431:onIfMatch = 211 211 211
+### Ds -> K π π
+431:onIfMatch = 321 211 211
+### Ds -> K K K
+431:onIfMatch = 321 321 321
+
+### Λc -> p K π
+4122:onIfMatch = 2212 321 211
+### Λc -> p K*
+4122:onIfMatch = 2212 313
+### Λc -> Delta++ K
+4122:onIfMatch = 2224 321
+### Λc -> Lambda(1520) π
+4122:onIfMatch = 102134 211
+### Λc -> p π π
+4122:onIfMatch = 2212 211 211
+### Λc -> pK0s
+4122:onIfMatch = 2212 311 
+### Λc -> p K K
+4122:onIfMatch = 2212 321 321
+
+### Ξc+ -> p K- π+
+4232:onIfMatch = 2212 321 211
+### Ξc+ -> Ξ- π+ π+
+4232:onIfMatch = 3312 211 211
+### Ξc+ -> p φ
+4232:onIfMatch = 2212 333