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Mattia Faggin
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Add configurations for MC production for SigmaC background studies.
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‎MC/config/PWGHF/external/generator/generator_pythia8_gaptriggered_hf.C‎

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mHadronPdgList = hadronPdgList;
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mPartPdgToReplaceList = partPdgToReplaceList;
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mFreqReplaceList = freqReplaceList;
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// Ds1*(2700), Ds1*(2860), Ds3*(2860), Xic(3055)+, Xic(3080)+, Xic(3055)0, Xic(3080)0
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mCustomPartPdgs = {30433, 40433, 437, 4315, 4316, 4325, 4326};
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// Ds1*(2700), Ds1*(2860), Ds3*(2860), Xic(3055)+, Xic(3080)+, Xic(3055)0, Xic(3080)0, LambdaC(2595), LambdaC(2625)
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mCustomPartPdgs = {30433, 40433, 437, 4315, 4316, 4325, 4326, 4124, 14122};
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mCustomPartMasses[30433] = 2.714f;
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mCustomPartMasses[40433] = 2.859f;
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mCustomPartMasses[437] = 2.860f;
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mCustomPartMasses[4315] = 3.0590f;
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mCustomPartMasses[4316] = 3.0799f;
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mCustomPartMasses[4325] = 3.0559f;
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mCustomPartMasses[4326] = 3.0772f;
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mCustomPartMasses[4124] = 2.62810f;
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mCustomPartMasses[14122] = 2.59225f;
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mCustomPartWidths[30433] = 0.122f;
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mCustomPartWidths[40433] = 0.160f;
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mCustomPartWidths[437] = 0.053f;
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mCustomPartWidths[4315] = 0.0064f;
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mCustomPartWidths[4316] = 0.0056f;
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mCustomPartWidths[4325] = 0.0078f;
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mCustomPartWidths[4326] = 0.0036f;
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mCustomPartWidths[4124] = 0.00052f;
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mCustomPartWidths[14122] = 0.0026f;
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Print();
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}
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‎MC/config/PWGHF/ini/GeneratorHF_D2H_ccbar_and_bbbar_gap5_Mode2_corrBkgSigmaC.ini‎

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### The external generator derives from GeneratorPythia8.
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[GeneratorExternal]
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fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGHF/external/generator/generator_pythia8_gaptriggered_hf.C
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funcName=GeneratorPythia8GapTriggeredCharmAndBeauty(5, -1.5, 1.5, -1.5, 1.5, {413}, {{413, 14122}, {413, 4124}}, {0.5, 0.5})
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[GeneratorPythia8]
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config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGHF/pythia8/generator/pythia8_charmhadronic_with_decays_Mode2_CorrBkgSigmaC.cfg
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includePartonEvent=false
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### not needed for jet studies, hence no need to keep parton event

‎MC/config/PWGHF/pythia8/generator/pythia8_charmhadronic_with_decays_Mode2_CorrBkgSigmaC.cfg‎

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### authors: Mattia Faggin (mattia.faggin@cern.ch)
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### last update: July 2025
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### beams
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Beams:idA 2212 # proton
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Beams:idB 2212 # proton
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Beams:eCM 13600. # GeV
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### processes
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SoftQCD:inelastic on # all inelastic processes
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### decays
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ParticleDecays:limitTau0 on
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ParticleDecays:tau0Max 10.
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### switching on Pythia Mode2
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ColourReconnection:mode 1
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ColourReconnection:allowDoubleJunRem off
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ColourReconnection:m0 0.3
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ColourReconnection:allowJunctions on
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ColourReconnection:junctionCorrection 1.20
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ColourReconnection:timeDilationMode 2
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ColourReconnection:timeDilationPar 0.18
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StringPT:sigma 0.335
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StringZ:aLund 0.36
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StringZ:bLund 0.56
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StringFlav:probQQtoQ 0.078
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StringFlav:ProbStoUD 0.2
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StringFlav:probQQ1toQQ0join 0.0275,0.0275,0.0275,0.0275
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MultiPartonInteractions:pT0Ref 2.15
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BeamRemnants:remnantMode 1
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BeamRemnants:saturation 5
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# switch off charm-hadron decays
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4122:onMode = off
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14122:onMode = off ### Lambda_c(2595)+ already present in PYTHIA
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4124:onMode = off ### Lambda_c(2625)+ already present in PYTHIA
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## Λc decays
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### Λc+ -> p K- π+
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4122:oneChannel = 1 0.0350 0 2212 -321 211 ### Λc+ -> p K- π+ (non-resonant) 3.5%
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4122:addChannel = 1 0.0196 100 2212 -313 ### Λc+ -> p K*0(892) 1.96%
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4122:addChannel = 1 0.0108 100 2224 -321 ### Λc+ -> Delta++ K- 1.08%
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4122:addChannel = 1 0.0022 100 102134 211 ### Λc+ -> Lambda(1520) K- 2.20e-3
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4122:onIfMatch = 2212 321 211
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4122:onIfMatch = 2212 313
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4122:onIfMatch = 2224 321
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4122:onIfMatch = 102134 211
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### Λc(2595)+
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14122:oneChannel = 1 0.24 0 4222 -211 ### Λc(2595)+ -> Σc(2455)++ π- (24%)
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14122:addChannel = 1 0.24 0 4112 211 ### Λc(2595)+ -> Σc(2455)0 π+ (24%)
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14122:addChannel = 1 0.18 0 4122 211 -211 ### Λc(2595)+ -> Λc+ π+ π- (18%)
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14122:onIfMatch = 4222 211 ### Λc(2595)+ -> Σc(2455)++ π-
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14122:onIfMatch = 4112 211 ### Λc(2595)+ -> Σc(2455)0 π+
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14122:onIfMatch = 4122 211 211 ### Λc(2595)+ -> Λc+ π+ π-
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### Λc(2625)+
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4124:oneChannel = 1 0.24 0 4222 -211 ### Λc(2592)+ -> Σc(2455)++ π- (24%)
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4124:addChannel = 1 0.24 0 4112 211 ### Λc(2592)+ -> Σc(2455)0 π+ (24%)
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4124:addChannel = 1 0.18 0 4122 211 -211 ### Λc(2592)+ -> Λc+ π+ π- (18%)
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4124:onIfMatch = 4222 211 ### Λc(2625)+ -> Σc(2455)++ π-
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4124:onIfMatch = 4112 211 ### Λc(2625)+ -> Σc(2455)0 π+
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4124:onIfMatch = 4122 211 211 ### Λc(2625)+ -> Λc+ π+ π-
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# Correct decay lengths (wrong in PYTHIA8 decay table)
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# Lb
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5122:tau0 = 0.4390
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# Xic0
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4132:tau0 = 0.0455
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# OmegaC
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4332:tau0 = 0.0803
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# Correct Breit-Wigner width
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4124:mWidth = 0.00052 # <0.52 MeV
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# Force the decay of resonances in the decay chain
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### K*0(892) -> K- π+
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313:onMode = off
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313:onIfAll = 321 211
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### for Λc -> Delta++ K-
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2224:onMode = off
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2224:onIfAll = 2212 211
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### for Λc -> Lambda(1520) K-
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102134:onMode = off
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102134:onIfAll = 2212 321

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