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[PWGLF] heavyionmultiplicity - FT0M multiplicity, split events #15472

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Merged
abmodak merged 3 commits into from
Mar 20, 2026
+13 −2
Merged

[PWGLF] heavyionmultiplicity - FT0M multiplicity, split events #15472

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f4912b9
adding FT0M multiplicity at generated level, check on split events
murioni Mar 20, 2026
084ecdd
Please consider the following formatting changes
alibuild Mar 20, 2026
3683b48
Merge pull request #10 from alibuild/alibot-cleanup-15472
murioni Mar 20, 2026
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15 changes: 13 additions & 2 deletions PWGLF/Tasks/GlobalEventProperties/heavyionMultiplicity.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -343,6 +343,10 @@ struct HeavyionMultiplicity {
histos.add("hMultEta05vsCentrRec", "multiplicity in eta<0.5 of selected MC events vs centrality", kTH2F, {axisCent, multAxis});
histos.add("hgendndetaVsMultEta05BeforeEvtSel", "hgendndetaBeforeEvtSel vs multiplicity in eta<0.5", kTH2F, {axisEta, multAxis});
histos.add("hgendndetaVsMultEta05AfterEvtSel", "hgendndetaAfterEvtSel vs multiplicity in eta<0.5", kTH2F, {axisEta, multAxis});
histos.add("hImpactParameterSplit", "Impact parameter of selected and split MC events", kTH1F, {impactParAxis});
histos.add("hMultEta05Split", "multiplicity in eta<0.5 of selected and split MC events", kTH1F, {multAxis});
histos.add("hMultSplit", "multiplicity of selected and split MC events", kTH1F, {axisFt0cMult});
histos.add("hMultvsCentrSplit", "multiplicity of selected and split MC events vs centrality ", kTH2F, {axisCent, axisFt0cMult});

histos.add("hMultGen", "multiplicity of generated MC events", kTH1F, {axisFt0cMult});
histos.add("hMultRec", "multiplicity of selected MC events", kTH1F, {axisFt0cMult});
Expand Down Expand Up @@ -462,8 +466,9 @@ struct HeavyionMultiplicity {
auto cent = -1;
if (isApplyCentFT0C) {
cent = col.multMCFT0C();
}
if (isApplyCentFV0A) {
} else if (isApplyCentFT0M) {
cent = (col.multMCFT0C() + col.multMCFT0A()) / 2.;
} else if (isApplyCentFV0A) {
cent = col.multMCFV0A();
}
return cent;
Expand Down Expand Up @@ -990,6 +995,12 @@ struct HeavyionMultiplicity {
if (std::abs(RecCol.posZ()) >= vtxRange) {
continue;
}

histos.fill(HIST("hImpactParameterSplit"), mcCollision.impactParameter());
histos.fill(HIST("hMultEta05Split"), mcCollision.multMCNParticlesEta05());
histos.fill(HIST("hMultSplit"), selColMultMC(mcCollision));
histos.fill(HIST("hMultvsCentrSplit"), selColCent(RecCol), selColMultMC(mcCollision));

if (RecCol.numContrib() <= numcontributors) {
continue;
} else {
Expand Down
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