use of GeneratorPYTHIA8 to generate background events instead of duplicate PYTHIA8 for injection mode (#2273)

hkoley · njacazio · web-flow · commit 6cd7584e0c61 · 2026-02-19T12:57:39.000+01:00
* use of GeneratorPYTHIA8 for background events in injection scheme

* add new decay logic for lambda1520

---------

Co-authored-by: Nicolò Jacazio &lt;njacazio@users.noreply.github.com&gt;
diff --git a/MC/config/PWGLF/ini/GeneratorLF_ExoticResonances_pp1360.ini b/MC/config/PWGLF/ini/GeneratorLF_ExoticResonances_pp1360.ini
@@ -1,10 +1,10 @@
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
-funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/exoticresonancegun.json", true, 4)
+funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/exoticresonancegun.json", true, 1, false, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg", "")
 
-# [GeneratorPythia8] # if triggered then this will be used as the background event
-# config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
+[GeneratorPythia8] # if triggered then this will be used as the background event
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
 
 [DecayerPythia8] # after for transport code!
 config[0]=${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/decayer/base.cfg
-config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
+config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
diff --git a/MC/config/PWGLF/ini/GeneratorLF_Resonances_PbPb.ini b/MC/config/PWGLF/ini/GeneratorLF_Resonances_PbPb.ini
@@ -1,10 +1,10 @@
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
-funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_pbpb.json", true, 4, true, false, "${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg", "${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg")
+funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_trig.json", true, 4, true, false, "${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg", "${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg")
 
-# [GeneratorPythia8]
-# config=${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg
+[GeneratorPythia8]
+config=${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg
 
 [DecayerPythia8] # after for transport code!
 config[0]=${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/decayer/base.cfg
-config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
+config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
diff --git a/MC/config/PWGLF/ini/GeneratorLF_Resonances_PbPb5360_injection.ini b/MC/config/PWGLF/ini/GeneratorLF_Resonances_PbPb5360_injection.ini
@@ -1,10 +1,10 @@
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
-funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_inj_pbpb.json", true, 4)
+funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_inj_pbpb.json", true, 1, false, false, "${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg", "")
 
-# [GeneratorPythia8]
-# config=${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg
+[GeneratorPythia8]
+config=${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg
 
 [DecayerPythia8] # after for transport code!
 config[0]=${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/decayer/base.cfg
-config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
+config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
diff --git a/MC/config/PWGLF/ini/GeneratorLF_Resonances_PbPb_exotic.ini b/MC/config/PWGLF/ini/GeneratorLF_Resonances_PbPb_exotic.ini
@@ -1,10 +1,10 @@
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
-funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_exotic_pbpb.json", true, 4, true, false, "${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg", "${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg")
+funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_exotic_pbpb.json", true, 4, false, false, "${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg", "")
 
-# [GeneratorPythia8]
-# config=${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg
+[GeneratorPythia8]
+config=${O2_ROOT}/share/Generators/egconfig/pythia8_hi.cfg
 
 [DecayerPythia8] # after for transport code!
 config[0]=${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/decayer/base.cfg
-config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
+config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
diff --git a/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp.ini b/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp.ini
@@ -1,10 +1,10 @@
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
-funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun.json", true, 4, true, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg", "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg")
+funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_trig.json", true, 4, true, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg", "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg")
 
-# [GeneratorPythia8] # if triggered then this will be used as the background event
-# config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
+[GeneratorPythia8] # if triggered then this will be used as the background event
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
 
 [DecayerPythia8] # after for transport code!
 config[0]=${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/decayer/base.cfg
-config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
+config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
diff --git a/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp1360.ini b/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp1360.ini
@@ -1,10 +1,10 @@
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
-funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun.json", true, 4, true, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg", "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg")
+funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_trig.json", true, 4, true, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg", "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg")
 
-# [GeneratorPythia8] # if triggered then this will be used as the background event
-# config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
+[GeneratorPythia8] # if triggered then this will be used as the background event
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
 
 [DecayerPythia8] # after for transport code!
 config[0]=${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/decayer/base.cfg
-config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
+config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
diff --git a/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp1360_injection.ini b/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp1360_injection.ini
@@ -1,10 +1,10 @@
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
-funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_inj.json", true, 4)
+funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_inj.json", true, 1, false, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg", "")
 
-# [GeneratorPythia8] # if triggered then this will be used as the background event
-# config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
+[GeneratorPythia8] # if triggered then this will be used as the background event
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
 
 [DecayerPythia8] # after for transport code!
 config[0]=${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/decayer/base.cfg
-config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
+config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
diff --git a/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp900.ini b/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp900.ini
@@ -1,10 +1,10 @@
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
-funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun.json", true, 4, true, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_pp900gev.cfg", "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_pp900gev.cfg")
+funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_trig.json", true, 4, true, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_pp900gev.cfg", "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_pp900gev.cfg")
 
-# [GeneratorPythia8] # if triggered then this will be used as the background event
-# config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_pp900gev.cfg
+[GeneratorPythia8] # if triggered then this will be used as the background event
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_pp900gev.cfg
 
 [DecayerPythia8] # after for transport code!
 config[0]=${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/decayer/base.cfg
-config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
+config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
diff --git a/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp900_injection.ini b/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp900_injection.ini
@@ -1,10 +1,10 @@
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
-funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_inj.json", true, 4)
+funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_inj.json", true, 4, false, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_pp900gev.cfg", "")
 
-# [GeneratorPythia8] # if triggered then this will be used as the background event
-# config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_pp900gev.cfg
+[GeneratorPythia8] # if triggered then this will be used as the background event
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_pp900gev.cfg
 
 [DecayerPythia8] # after for transport code!
 config[0]=${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/decayer/base.cfg
-config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
+config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
diff --git a/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp_exotic.ini b/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp_exotic.ini
@@ -1,10 +1,10 @@
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
-funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/gluelistgun.json", true, 4, true, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg", "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg")
+funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/gluelistgun.json", true, 4, false, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg", "")
 
-# [GeneratorPythia8] # if triggered then this will be used as the background event
-# config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
+[GeneratorPythia8] # if triggered then this will be used as the background event
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
 
 [DecayerPythia8] # after for transport code!
 config[0]=${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/decayer/base.cfg
-config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
+config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
diff --git a/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp_exoticAll.ini b/MC/config/PWGLF/ini/GeneratorLF_Resonances_pp_exoticAll.ini
@@ -1,10 +1,10 @@
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
-funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_exotic.json", true, 4, true, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg", "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg")
+funcName=generateLFRapidity("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonancelistgun_exotic.json", true, 4, false, false, "${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg", "")
 
-# [GeneratorPythia8] # if triggered then this will be used as the background event
-# config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
+[GeneratorPythia8] # if triggered then this will be used as the background event
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/pythia8_inel_136tev.cfg
 
 [DecayerPythia8] # after for transport code!
 config[0]=${O2DPG_MC_CONFIG_ROOT}/MC/config/common/pythia8/decayer/base.cfg
-config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
+config[1]=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/resonances.cfg
diff --git a/MC/config/PWGLF/pythia8/generator/lambda1520.cfg b/MC/config/PWGLF/pythia8/generator/lambda1520.cfg
@@ -0,0 +1,10 @@
+### Define resonance
+ProcessLevel:all = off # will not look for the 'process'
+
+# id::all = name antiName spinType chargeType colType m0 mWidth mMin mMax tau0
+102134:all =  Lambda1520 Lambda1520bar 4 0 0 1.51950 0.01560 1.47 1.60 0
+
+### add Resonance decays absent in PYTHIA8 decay table and set BRs from PDG for other
+102134:oneChannel = 1 1.000 0 2212 -321
+102134:onMode = off
+102134:onIfMatch = 2212 -321
diff --git a/MC/config/PWGLF/pythia8/generator/lambda1520gun_inj.json b/MC/config/PWGLF/pythia8/generator/lambda1520gun_inj.json
@@ -0,0 +1,24 @@
+{
+    "Lambda(1520)0" : {
+        "pdg": 102134,
+        "n": 5,
+        "ptMin": 0.0,
+        "ptMax": 15,
+        "etaMin": -1.0,
+        "etaMax": 1.0,
+        "rapidityMin": -1.0,
+        "rapidityMax": 1.0,
+        "genDecayed": true
+    },
+    "anti-Lambda(1520)0" : {
+        "pdg": -102134,
+        "n": 5,
+        "ptMin": 0.0,
+        "ptMax": 15,
+        "etaMin": -1.0,
+        "etaMax": 1.0,
+        "rapidityMin": -1.0,
+        "rapidityMax": 1.0,
+        "genDecayed": true
+    }
+}
diff --git a/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C b/MC/config/PWGLF/pythia8/generator_pythia8_LF_rapidity.C
