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[PWGLF] Update on initializerQA for a resonance-width check at the mcParticle level #15739

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[PWGLF] Update on initializerQA for a resonance-width check at the mcParticle level #15739

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35 changes: 22 additions & 13 deletions PWGLF/Tasks/Resonances/initializereventqa.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,7 @@
#include <TPDGCode.h>

#include <algorithm>
#include <cmath>
#include <vector>

using namespace o2;
Expand Down Expand Up @@ -71,6 +72,7 @@ struct Initializereventqa {
ConfigurableAxis signalFT0MAxis{"signalFT0MAxis", {4000, 0, 40000}, "FT0M amplitude"};
ConfigurableAxis signalFV0AAxis{"signalFV0AAxis", {4000, 0, 40000}, "FV0A amplitude"};
ConfigurableAxis nCandidates{"nCandidates", {30, -0.5, 29.5}, "N_{cand.}"};
ConfigurableAxis massAxis{"massAxis", {400, 1.4f, 1.8f}, "#it{M} (GeV/#it{c}^{2})"};

// Event selection criteria
Configurable<float> cutzvertex{"cutzvertex", 10.0f, "Accepted z-vertex range (cm)"};
Expand Down Expand Up @@ -146,8 +148,8 @@ struct Initializereventqa {
registry.add("hFT0MsignalPVContr", "hFT0MsignalPVContr", {HistType::kTH3D, {signalFT0MAxis, multNTracksAxis, eventTypeAxis}});
}

registry.add("h3ResonanceTruth", "pT distribution of True Resonance", kTHnSparseF, {eventTypeAxis, ptAxis, centFT0MAxis});
registry.add("h3ResonanceTruthAnti", "pT distribution of True Resonance Anti", kTHnSparseF, {eventTypeAxis, ptAxis, centFT0MAxis});
registry.add("h4ResonanceTruthMass", "pT-mass distribution of True Resonance", kTHnSparseF, {eventTypeAxis, ptAxis, massAxis, centFT0MAxis});
registry.add("h4ResonanceTruthAntiMass", "pT-mass distribution of True Resonance Anti", kTHnSparseF, {eventTypeAxis, ptAxis, massAxis, centFT0MAxis});
}
float pvEta1 = 1.0f;
float globalEta05 = 0.5f;
Expand Down Expand Up @@ -272,25 +274,32 @@ struct Initializereventqa {

if (std::abs(mcPart.pdgCode()) != pdgTruthMother || std::abs(mcPart.y()) >= cfgRapidityCut)
continue;
std::vector<int> daughterPDGs;
if (mcPart.has_daughters()) {
auto daughter01 = mcParticles.rawIteratorAt(mcPart.daughtersIds()[0] - mcParticles.offset());
auto daughter02 = mcParticles.rawIteratorAt(mcPart.daughtersIds()[1] - mcParticles.offset());
daughterPDGs = {daughter01.pdgCode(), daughter02.pdgCode()};
} else {
daughterPDGs = {-1, -1};
if (!mcPart.has_daughters()) {
continue;
}

auto daughter01 = mcParticles.rawIteratorAt(mcPart.daughtersIds()[0] - mcParticles.offset());
auto daughter02 = mcParticles.rawIteratorAt(mcPart.daughtersIds()[1] - mcParticles.offset());
std::vector<int> daughterPDGs = {daughter01.pdgCode(), daughter02.pdgCode()};

if (isDaughterCheck) {
bool pass1 = std::abs(daughterPDGs[0]) == pdgTruthDaughter1 || std::abs(daughterPDGs[1]) == pdgTruthDaughter1;
bool pass2 = std::abs(daughterPDGs[0]) == pdgTruthDaughter2 || std::abs(daughterPDGs[1]) == pdgTruthDaughter2;
if (!pass1 || !pass2)
continue;
}
if (mcPart.pdgCode() > 0) // Consider INELt0 or INEL
registry.fill(HIST("h3ResonanceTruth"), eventType, mcPart.pt(), multiplicity);
else
registry.fill(HIST("h3ResonanceTruthAnti"), eventType, mcPart.pt(), multiplicity);
const float daughterPx = daughter01.px() + daughter02.px();
const float daughterPy = daughter01.py() + daughter02.py();
const float daughterPz = daughter01.pz() + daughter02.pz();
const float daughterEnergy = daughter01.e() + daughter02.e();
const float daughterP2 = daughterPx * daughterPx + daughterPy * daughterPy + daughterPz * daughterPz;
const float mcMass = std::sqrt(std::max(0.f, daughterEnergy * daughterEnergy - daughterP2));

if (mcPart.pdgCode() > 0) { // Consider INELt0 or INEL
registry.fill(HIST("h4ResonanceTruthMass"), eventType, mcPart.pt(), mcMass, multiplicity);
} else {
registry.fill(HIST("h4ResonanceTruthAntiMass"), eventType, mcPart.pt(), mcMass, multiplicity);
}

daughterPDGs.clear();
}
Expand Down
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