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[PWGLF] Light ions multiplicity at midrapidy - heavyionMultiplicity.cxx #14101

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Merged
abmodak merged 4 commits into from
Dec 5, 2025
Merged

[PWGLF] Light ions multiplicity at midrapidy - heavyionMultiplicity.cxx #14101

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901d207
adding QA plots
murioni Dec 3, 2025
f7b6ca7
adding histos vs multiplicity for evt sig loss
murioni Dec 5, 2025
f5f9f17
Please consider the following formatting changes
alibuild Dec 5, 2025
0864120
Merge pull request #7 from alibuild/alibot-cleanup-14101
murioni Dec 5, 2025
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49 changes: 49 additions & 0 deletions PWGLF/Tasks/GlobalEventProperties/heavyionMultiplicity.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -131,6 +131,7 @@
AxisSpec axisEvent{10, 0.5, 10.5, "#Event", "EventAxis"};
AxisSpec axisVtxZ{40, -20, 20, "Vertex Z", "VzAxis"};
AxisSpec axisEta{40, -2, 2, "#eta", "EtaAxis"};
AxisSpec axisEtaExtended{100, -5, 5, "#eta", "EtaAxisExtended"};
AxisSpec axisPhi{{0, o2::constants::math::PIQuarter, o2::constants::math::PIHalf, o2::constants::math::PIQuarter * 3., o2::constants::math::PI, o2::constants::math::PIQuarter * 5., o2::constants::math::PIHalf * 3., o2::constants::math::PIQuarter * 7., o2::constants::math::TwoPI}, "#phi", "PhiAxis"};
AxisSpec axisPhi2{629, 0, o2::constants::math::TwoPI, "#phi"};
AxisSpec axisCent{100, 0, 100, "#Cent"};
Expand Down Expand Up @@ -178,6 +179,7 @@
ConfigurableAxis occupancyBin{"occupancyBin", {VARIABLE_WIDTH, 0, 500, 1000, 2000, 5000, 10000}, ""};
ConfigurableAxis centBinGen{"centBinGen", {VARIABLE_WIDTH, 0, 500, 1000, 2000, 5000, 10000}, ""};
ConfigurableAxis binsImpactPar{"binsImpactPar", {VARIABLE_WIDTH, 0.0, 3.00065, 4.28798, 6.14552, 7.6196, 8.90942, 10.0897, 11.2002, 12.2709, 13.3167, 14.4173, 23.2518}, "Binning of the impact parameter axis"};
ConfigurableAxis binsMult{"binsMult", {500, 0.0f, +500.0f}, ""};

Configurable<bool> isApplySameBunchPileup{"isApplySameBunchPileup", true, "Enable SameBunchPileup cut"};
Configurable<bool> isApplyGoodZvtxFT0vsPV{"isApplyGoodZvtxFT0vsPV", true, "Enable GoodZvtxFT0vsPV cut"};
Expand Down Expand Up @@ -211,6 +213,7 @@
AxisSpec axisOccupancy = {occupancyBin, "occupancy", "OccupancyAxis"};
AxisSpec axisCentBinGen = {centBinGen, "GenCentrality", "CentGenAxis"};
AxisSpec impactParAxis = {binsImpactPar, "Impact Parameter"};
AxisSpec multAxis = {binsMult, "Multiplicity #eta<0.5"};

histos.add("EventHist", "EventHist", kTH1D, {axisEvent}, false);
histos.add("VtxZHist", "VtxZHist", kTH1D, {axisVtxZ}, false);
Expand Down Expand Up @@ -313,6 +316,22 @@
x->SetBinLabel(1, "All MC events");
x->SetBinLabel(2, "MC events with reco event after event selection");
x->SetBinLabel(3, "MC events with no reco events");
histos.add("hgendndetaVscentGenwithNOreco", "dndeta vs impact parameter, gen events with no reco", kTH2F, {axisEtaExtended, impactParAxis});
histos.add("hgendndetaVscentGenwithReco", "dndeta vs impact parameter, gen events with at least one reco", kTH2F, {axisEtaExtended, impactParAxis});

histos.add("hMultEta05GenwithNoreco", "multiplicity in eta<0.5 of generated MC events, with no recoevent", kTH1F, {multAxis});
histos.add("hMultEta05Gen", "multiplicity in eta<0.5 of generated MC events", kTH1F, {multAxis});
histos.add("hMultEta05Rec", "multiplicity in eta<0.5 of selected MC events", kTH1F, {multAxis});
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("hMultGen", "multiplicity of generated MC events", kTH1F, {axisFt0cMult});
histos.add("hMultRec", "multiplicity of selected MC events", kTH1F, {axisFt0cMult});
histos.add("hMultvsCentrRec", "multiplicity of selected MC events vs centrality", kTH2F, {axisCent, axisFt0cMult});
histos.add("hgendndetaVsMultBeforeEvtSel", "hgendndetaBeforeEvtSel vs multiplicity", kTH2F, {axisEta, axisFt0cMult});
histos.add("hgendndetaVsMultAfterEvtSel", "hgendndetaAfterEvtSel vs multiplicity", kTH2F, {axisEta, axisFt0cMult});

histos.add("hImpactParameterGenwithNoreco", "Impact parameter of generated MC events, with no recoevent", kTH1F, {impactParAxis});
histos.add("hImpactParameterGen", "Impact parameter of generated MC events", kTH1F, {impactParAxis});
histos.add("hImpactParameterRec", "Impact parameter of selected MC events", kTH1F, {impactParAxis});
Expand Down Expand Up @@ -415,6 +434,19 @@
return cent;
}

template <typename CheckColCent>
float selColMultMC(CheckColCent const& col)
{
auto cent = -1;
if (isApplyCentFT0C) {
cent = col.multMCFT0C();
}
if (isApplyCentFV0A) {
cent = col.multMCFV0A();
}
return cent;
}

template <typename CheckColOccu>
float selColOccu(CheckColOccu const& col)
{
Expand Down Expand Up @@ -880,10 +912,10 @@
if (std::abs(particle.eta()) < 1.0) {
multBarrelEta10++;
}
if (-3.3 < particle.eta() && particle.eta() < -2.1) {

Check failure on line 915 in PWGLF/Tasks/GlobalEventProperties/heavyionMultiplicity.cxx

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
multFT0C++;
}
if (3.5 < particle.eta() && particle.eta() < 4.9) {

Check failure on line 918 in PWGLF/Tasks/GlobalEventProperties/heavyionMultiplicity.cxx

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
multFT0A++;
}
}
Expand Down Expand Up @@ -916,10 +948,13 @@
// All generated events
histos.fill(HIST("MCEventHist"), 1);
histos.fill(HIST("hImpactParameterGen"), mcCollision.impactParameter());
histos.fill(HIST("hMultEta05Gen"), mcCollision.multMCNParticlesEta05());
histos.fill(HIST("hMultGen"), selColMultMC(mcCollision));

if (RecCols.size() == 0) {
histos.fill(HIST("MCEventHist"), 3);
histos.fill(HIST("hImpactParameterGenwithNoreco"), mcCollision.impactParameter());
histos.fill(HIST("hMultEta05GenwithNoreco"), mcCollision.multMCNParticlesEta05());
}

bool atLeastOne = false;
Expand All @@ -945,23 +980,37 @@
if (atLeastOne) {
histos.fill(HIST("MCEventHist"), 2);
histos.fill(HIST("hImpactParameterRec"), mcCollision.impactParameter());
histos.fill(HIST("hMultEta05Rec"), mcCollision.multMCNParticlesEta05());
histos.fill(HIST("hMultRec"), selColMultMC(mcCollision));
histos.fill(HIST("hImpactParvsCentrRec"), centrality, mcCollision.impactParameter());
histos.fill(HIST("hMultEta05vsCentrRec"), centrality, mcCollision.multMCNParticlesEta05());
histos.fill(HIST("hMultvsCentrRec"), centrality, selColMultMC(mcCollision));
}

for (const auto& particle : GenParticles) {

if (RecCols.size() == 0) {
histos.fill(HIST("hgendndetaVscentGenwithNOreco"), particle.eta(), mcCollision.impactParameter());
} else {
histos.fill(HIST("hgendndetaVscentGenwithReco"), particle.eta(), mcCollision.impactParameter());
}

if (!isGenTrackSelected(particle)) {
continue;
}

// All generated particles
histos.fill(HIST("hgendndetaBeforeEvtSel"), particle.eta());
histos.fill(HIST("hgendndetaVscentBeforeEvtSel"), particle.eta(), mcCollision.impactParameter());
histos.fill(HIST("hgendndetaVsMultEta05BeforeEvtSel"), particle.eta(), mcCollision.multMCNParticlesEta05());
histos.fill(HIST("hgendndetaVsMultBeforeEvtSel"), particle.eta(), selColMultMC(mcCollision));

if (atLeastOne) {
// All generated particles with at least one reconstructed collision (signal loss estimation)
histos.fill(HIST("hgendndetaAfterEvtSel"), particle.eta());
histos.fill(HIST("hgendndetaVscentAfterEvtSel"), particle.eta(), mcCollision.impactParameter());
histos.fill(HIST("hgendndetaVsMultEta05AfterEvtSel"), particle.eta(), mcCollision.multMCNParticlesEta05());
histos.fill(HIST("hgendndetaVsMultAfterEvtSel"), particle.eta(), selColMultMC(mcCollision));
}
}
}
Expand Down
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