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[PWGLF] For centrality calibration in MC #16030

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159 changes: 92 additions & 67 deletions PWGLF/Tasks/Nuspex/spectraTOF.cxx
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
// Copyright 2019-2020 CERN and copyright holders of ALICE O2.

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[name/workflow-file] 

Name of a workflow file must match the name of the main struct in it (without the PWG prefix). (Class implementation files should be in "Core" directories.)
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
Expand Down Expand Up @@ -632,6 +632,8 @@
hh->GetXaxis()->SetBinLabel(4, "INEL>1");
hh->GetXaxis()->SetBinLabel(5, "hasParticleInFT0C && hasParticleInFT0A");
histos.add("MC/MultiplicityRecoEv", "MC multiplicity", kTH1D, {multAxis});
histos.add("MC/CentFT0CVsTrueMult", "MC Centrality vs True Multiplicity", kTH2D, {multAxis, {150, 0, 150, "Track multiplicity"}});

histos.add("MC/Multiplicity", "MC multiplicity", kTH1D, {multAxis});
histos.add("MC/MultiplicityMCINELgt0", "MC multiplicity", kTH1D, {multAxis});
histos.add("MC/MultiplicityMCINELgt1", "MC multiplicity", kTH1D, {multAxis});
Expand All @@ -645,7 +647,7 @@
}
}

hMultiplicityvsPercentile = histos.add<TH2>("Mult/vsPercentile", "Multiplicity vs percentile", HistType::kTH2D, {{150, 0, 150}, {100, 0, 100, "Track multiplicity"}});
hMultiplicityvsPercentile = histos.add<TH2>("Mult/vsPercentile", "Multiplicity vs percentile", HistType::kTH2D, {{multAxis}, {150, 0, 150, "Track multiplicity"}});

for (int i = 0; i < NpCharge; i++) {
switch (i) {
Expand Down Expand Up @@ -1532,7 +1534,7 @@
}

// trackwCut++;
const auto& mcLabel = mcTrackLabels.iteratorAt(track.globalIndex());

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
const auto& mcParticle = mcParticles.iteratorAt(mcLabel.mcParticleId());
int pdgCode = mcParticle.pdgCode();
const auto& nsigmaTPCPi = o2::aod::pidutils::tpcNSigma<2>(track);
Expand Down Expand Up @@ -2487,26 +2489,27 @@
}
}

// ==============================================================================
// HELPER 1: For Reconstructed Events
// Accepts 'eventMultiplicity' (which will be the actual Reco Centrality)
// ==============================================================================
template <std::size_t i, typename ParticleType>
void fillParticleHistogramsMCRecoEvs(ParticleType const& mcParticle, RecoMCCollisions::iterator const& collision)
void fillParticleHistogramsMCRecoEvs(ParticleType const& mcParticle, RecoMCCollisions::iterator const& collision, float eventMultiplicity)
{
if (!isParticleEnabled<i>()) { // Check if the particle is enabled
if (!isParticleEnabled<i>()) {
return;
}

if (mcParticle.pdgCode() != PDGs[i]) {
return;
}

const auto& mcCollision = collision.mcCollision_as<GenMCCollisions>();
const float multiplicity = getMultiplicityMC(mcCollision);

if (mcParticle.isPhysicalPrimary()) {
if (isEventSelected<false, false>(collision)) {
if (includeCentralityMC) {
histos.fill(HIST(hpt_den_prm_goodev[i]), mcParticle.pt(), multiplicity, mcParticle.eta());
histos.fill(HIST(hpt_den_prm_goodev[i]), mcParticle.pt(), eventMultiplicity, mcParticle.eta());
} else {
histos.fill(HIST(hpt_den_prm_goodev[i]), mcParticle.pt(), multiplicity);
histos.fill(HIST(hpt_den_prm_goodev[i]), mcParticle.pt(), eventMultiplicity);
}
} else {
bool isSelected = collision.sel8();
Expand All @@ -2529,40 +2532,43 @@
}
if (isSelected) {
if (includeCentralityMC) {
histos.fill(HIST(hpt_den_prm_evsel[i]), mcParticle.pt(), multiplicity, mcParticle.eta());
histos.fill(HIST(hpt_den_prm_evsel[i]), mcParticle.pt(), eventMultiplicity, mcParticle.eta());
} else {
histos.fill(HIST(hpt_den_prm_evsel[i]), mcParticle.pt(), multiplicity);
histos.fill(HIST(hpt_den_prm_evsel[i]), mcParticle.pt(), eventMultiplicity);
}
}
} else {
if (includeCentralityMC) {
histos.fill(HIST(hpt_den_prm_recoev[i]), mcParticle.pt(), multiplicity, mcParticle.eta());
histos.fill(HIST(hpt_den_prm_recoev[i]), mcParticle.pt(), eventMultiplicity, mcParticle.eta());
} else {
histos.fill(HIST(hpt_den_prm_recoev[i]), mcParticle.pt(), multiplicity);
histos.fill(HIST(hpt_den_prm_recoev[i]), mcParticle.pt(), eventMultiplicity);
}
}
}
}
}

// ==============================================================================
// HELPER 2: For All Generated Events (Signal Loss Denominator)
// Accepts 'eventMultiplicity' (which will be the True Multiplicity |eta| < 0.5)
// ==============================================================================
template <std::size_t i, typename ParticleType>
void fillParticleHistogramsMCGenEvs(ParticleType const& mcParticle, GenMCCollisions::iterator const& mcCollision)
void fillParticleHistogramsMCGenEvs(ParticleType const& mcParticle, float eventMultiplicity)
{

if (!isParticleEnabled<i>()) { // Check if the particle is enabled
if (!isParticleEnabled<i>()) {
return;
}

if (mcParticle.pdgCode() != PDGs[i]) {
return;
}

const float multiplicity = getMultiplicityMC(mcCollision);
if (mcParticle.isPhysicalPrimary()) {
if (std::abs(mcCollision.posZ()) < evselOptions.cfgCutVertex) {
histos.fill(HIST(hpt_den_prm_mcgoodev[i]), mcParticle.pt(), multiplicity);
// Ensure this matches the array name for your generated denominator histograms!
if (includeCentralityMC) {
histos.fill(HIST(hpt_den_prm_mcgoodev[i]), mcParticle.pt(), eventMultiplicity);
} else {
histos.fill(HIST(hpt_den_prm_mcbadev[i]), mcParticle.pt(), multiplicity);
histos.fill(HIST(hpt_den_prm_mcbadev[i]), mcParticle.pt(), eventMultiplicity);
}
}
}
Expand All @@ -2584,6 +2590,9 @@
histos.fill(HIST("MC/GenRecoCollisions"), 1.f, mcCollisions.size());
histos.fill(HIST("MC/GenRecoCollisions"), 2.f, collisions.size());

// ==============================================================================
// 1. RECONSTRUCTED TRACKS LOOP
// ==============================================================================
for (const auto& track : tracks) {
if (!track.has_collision()) {
if (track.sign() > 0) {
Expand Down Expand Up @@ -2613,107 +2622,123 @@
fillTrackHistogramsMC<i>(track, mcParticle, track.collision_as<RecoMCCollisions>(), mcParticles);
});
}

// (Keeping your original includeCentralityMC legacy block intact to avoid breaking other parts of your code)
if (includeCentralityMC) {
for (const auto& collision : collisions) {
if (!collision.has_mcCollision()) {
continue;
}
if (!collision.has_mcCollision()) continue;
const auto& mcCollision = collision.mcCollision_as<GenMCCollisions>();
const auto& particlesInCollision = mcParticles.sliceByCached(aod::mcparticle::mcCollisionId, mcCollision.globalIndex(), cache);
const float multiplicity = getMultiplicity(collision);
for (const auto& mcParticle : particlesInCollision) {

if (std::abs(mcParticle.y()) > trkselOptions.cfgCutY) {
continue;
}
static_for<0, 17>([&](auto i) {
fillParticleHistogramsMC<i>(multiplicity, mcParticle);
});
if (std::abs(mcParticle.y()) > trkselOptions.cfgCutY) continue;
static_for<0, 17>([&](auto i) { fillParticleHistogramsMC<i>(multiplicity, mcParticle); });
}
}
} else {
for (const auto& mcParticle : mcParticles) {
if (std::abs(mcParticle.y()) > trkselOptions.cfgCutY) {
continue;
}

if (std::abs(mcParticle.y()) > trkselOptions.cfgCutY) continue;
const auto& mcCollision = mcParticle.mcCollision_as<GenMCCollisions>();
const float multiplicity = getMultiplicityMC(mcCollision);

static_for<0, 17>([&](auto i) {
fillParticleHistogramsMC<i>(multiplicity, mcParticle);
});
static_for<0, 17>([&](auto i) { fillParticleHistogramsMC<i>(multiplicity, mcParticle); });
}
}
// Loop on reconstructed collisions

// ==============================================================================
// 2. RECONSTRUCTED COLLISIONS LOOP (Builds the 2D Calibration Map)
// ==============================================================================
for (const auto& collision : collisions) {
if (!collision.has_mcCollision()) {
continue;
}
const auto& mcCollision = collision.mcCollision_as<GenMCCollisions>();
const auto& particlesInCollision = mcParticles.sliceByCached(aod::mcparticle::mcCollisionId, mcCollision.globalIndex(), cache);

if (evselOptions.cfgINELCut.value == 1) {
if (!o2::pwglf::isINELgt0mc(particlesInCollision, pdgDB)) {
continue;
}
if (!o2::pwglf::isINELgt0mc(particlesInCollision, pdgDB)) continue;
}
if (evselOptions.cfgINELCut.value == 2) {
if (!o2::pwglf::isINELgt1mc(particlesInCollision, pdgDB)) {
continue;
if (!o2::pwglf::isINELgt1mc(particlesInCollision, pdgDB)) continue;
}

// -- Get Actual Reconstructed Centrality --
float recoCentrality = collision.centFT0C();

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.

// -- Calculate True Multiplicity in |eta| < 0.5 --
int trueMultEta05 = 0;
for (const auto& mcParticle : particlesInCollision) {
if (!mcParticle.isPhysicalPrimary()) continue;
auto* pdgParticle = pdgDB->GetParticle(mcParticle.pdgCode());
if (pdgParticle != nullptr && std::abs(pdgParticle->Charge()) > 0.01) {
if (std::abs(mcParticle.eta()) < 0.5f) {
trueMultEta05++;
}
}
}

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[magic-number] 

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
if (isEventSelected<false, false>(collision)) {
histos.fill(HIST("MC/MultiplicityRecoEv"), getMultiplicityMC(mcCollision));
histos.fill(HIST("MC/MultiplicityRecoEv"), recoCentrality);
// -- Fill the 2D map to extract the 1D calibration profile later! --
histos.fill(HIST("MC/CentFT0CVsTrueMult"), recoCentrality, trueMultEta05);
}

for (const auto& mcParticle : particlesInCollision) {
if (std::abs(mcParticle.y()) > trkselOptions.cfgCutY) {
continue;
}
if (std::abs(mcParticle.y()) > trkselOptions.cfgCutY) continue;
static_for<0, 17>([&](auto i) {
fillParticleHistogramsMCRecoEvs<i>(mcParticle, collision);
// Pass the actual Reco Centrality to the helper function
fillParticleHistogramsMCRecoEvs<i>(mcParticle, collision, recoCentrality);
});
}
}

// Loop on generated collisions
// ==============================================================================
// 3. GENERATED COLLISIONS LOOP (Builds the Signal Loss Denominator)
// ==============================================================================
for (const auto& mcCollision : mcCollisions) {
if (std::abs(mcCollision.posZ()) > evselOptions.cfgCutVertex) {
continue;
}
histos.fill(HIST("MC/Multiplicity"), getMultiplicityMC(mcCollision));

const auto& particlesInCollision = mcParticles.sliceByCached(aod::mcparticle::mcCollisionId, mcCollision.globalIndex(), cache);
bool hasParticleInFT0C = false;
bool hasParticleInFT0A = false;
if (evselOptions.cfgINELCut.value == EvSelInelGt0Cut) {
if (!o2::pwglf::isINELgt0mc(particlesInCollision, pdgDB)) {
continue;

// -- Calculate True Multiplicity in |eta| < 0.5 --
int trueMultEta05 = 0;
for (const auto& mcParticle : particlesInCollision) {
if (!mcParticle.isPhysicalPrimary()) continue;
auto* pdgParticle = pdgDB->GetParticle(mcParticle.pdgCode());
if (pdgParticle != nullptr && std::abs(pdgParticle->Charge()) > 0.01) {
if (std::abs(mcParticle.eta()) < 0.5f) {
trueMultEta05++;
}
}
}

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
histos.fill(HIST("MC/MultiplicityMCINELgt0"), getMultiplicityMC(mcCollision));

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[magic-number] 

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histos.fill(HIST("MC/Multiplicity"), trueMultEta05);

if (evselOptions.cfgINELCut.value == EvSelInelGt0Cut) {
if (!o2::pwglf::isINELgt0mc(particlesInCollision, pdgDB)) continue;
}
histos.fill(HIST("MC/MultiplicityMCINELgt0"), trueMultEta05);

if (evselOptions.cfgINELCut.value == EvSelInelGt1Cut) {
if (!o2::pwglf::isINELgt1mc(particlesInCollision, pdgDB)) {
continue;
}
if (!o2::pwglf::isINELgt1mc(particlesInCollision, pdgDB)) continue;
}
histos.fill(HIST("MC/MultiplicityMCINELgt1"), getMultiplicityMC(mcCollision));
histos.fill(HIST("MC/MultiplicityMCINELgt1"), trueMultEta05);

for (const auto& mcParticle : particlesInCollision) {
if (std::abs(mcParticle.y()) > trkselOptions.cfgCutY) {
continue;
}
if (std::abs(mcParticle.y()) > trkselOptions.cfgCutY) continue;
static_for<0, 17>([&](auto i) {
fillParticleHistogramsMCGenEvs<i>(mcParticle, mcCollision);
// Pass True Multiplicity directly so it plots generated particles against it
fillParticleHistogramsMCGenEvs<i>(mcParticle, trueMultEta05);
});
}

if (mcCollision.isInelGt0()) {
histos.fill(HIST("MC/GenRecoCollisions"), 3.f);
}
if (mcCollision.isInelGt1()) {
histos.fill(HIST("MC/GenRecoCollisions"), 4.f);
}
if (hasParticleInFT0C && hasParticleInFT0A) {
histos.fill(HIST("MC/GenRecoCollisions"), 5.f);
}
}
}
PROCESS_SWITCH(tofSpectra, processMC, "Process MC", false);
Expand Down
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