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[PWGLF] added nsigma ITS selections in the purity studies for li4. Fixed bug in the nuclei from hypertriton map #14273

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Merged
maciacco merged 2 commits into from
Dec 18, 2025
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[PWGLF] added nsigma ITS selections in the purity studies for li4. Fixed bug in the nuclei from hypertriton map #14273

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78d3076
fixed bug: missing std::abs() when selecting the nucleus pdg code
GiorgioAlbertoLucia Dec 18, 2025
74aea83
added ITS nsigma selections in the purity study
GiorgioAlbertoLucia Dec 18, 2025
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47 changes: 28 additions & 19 deletions PWGLF/TableProducer/Nuspex/he3HadronFemto.cxx
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@@ -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 @@ -49,7 +49,7 @@
#include "Framework/runDataProcessing.h"
#include "ReconstructionDataFormats/Track.h"

#include <TDatabasePDG.h>

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[pdg/database] 

Do not use TDatabasePDG directly. Use o2::constants::physics::Mass... or Service<o2::framework::O2DatabasePDG> instead.
#include <TDirectory.h>
#include <TFile.h>
#include <TH1F.h>
Expand Down Expand Up @@ -279,6 +279,7 @@
SameKindPair<CollisionsFull, TrackCandidates, BinningType> mPair{binningPolicy, settingNoMixedEvents, -1, &cache};

std::array<float, 6> mBBparamsHe;
o2::aod::ITSResponse mResponseITS;

std::vector<int> mRecoCollisionIDs;
std::vector<bool> mGoodCollisions;
Expand Down Expand Up @@ -310,14 +311,16 @@
{"He3/hChi2NClHe3ITS", "^{3}He;Chi2_{ITS} Ncluster", {HistType::kTH1F, {{100, 0, 100.0f}}}},
{"He3/hHe3Pt", "^{3}He; #it{p}_{T} (GeV/#it{c})", {HistType::kTH1F, {{240, -6.0f, 6.0f}}}},
{"He3/h2dEdxHe3candidates", "dEdx distribution; #it{p} (GeV/#it{c}); dE/dx (a.u.)", {HistType::kTH2F, {{200, -5.0f, 5.0f}, {100, 0.0f, 2000.0f}}}},
{"He3/h2NsigmaHe3ITS", "NsigmaHe3 ITS distribution; signed #it{p}_{T} (GeV/#it{c}); n#sigma_{ITS} ^{3}He", {HistType::kTH2F, {{100, -5.0f, 5.0f}, {120, -3.0f, 3.0f}}}},
{"He3/h2NsigmaHe3ITS_preselection", "NsigmaHe3 ITS distribution; signed #it{p}_{T} (GeV/#it{c}); n#sigma_{ITS} ^{3}He", {HistType::kTH2F, {{50, -5.0f, 5.0f}, {120, -3.0f, 3.0f}}}},
{"He3/h2NsigmaHe3TPC", "NsigmaHe3 TPC distribution; #it{p}_{T} (GeV/#it{c}); n#sigma_{TPC}(^{3}He)", {HistType::kTH2F, {{100, -5.0f, 5.0f}, {200, -5.0f, 5.0f}}}},
{"He3/h2NsigmaHe3TPC_preselection", "NsigmaHe3 TPC distribution; #it{p}_{T} (GeV/#it{c}); n#sigma_{TPC}(^{3}He)", {HistType::kTH2F, {{100, -5.0f, 5.0f}, {400, -10.0f, 10.0f}}}},
{"He3/h2NSigmaHe3ITS", "NsigmaHe3 ITS distribution; signed #it{p}_{T} (GeV/#it{c}); n#sigma_{ITS} ^{3}He", {HistType::kTH2F, {{100, -5.0f, 5.0f}, {120, -3.0f, 3.0f}}}},
{"He3/h2NSigmaHe3ITS_preselection", "NsigmaHe3 ITS distribution; signed #it{p}_{T} (GeV/#it{c}); n#sigma_{ITS} ^{3}He", {HistType::kTH2F, {{50, -5.0f, 5.0f}, {120, -3.0f, 3.0f}}}},

{"Had/hNClsHadITS", "had;N_{ITS} Cluster", {HistType::kTH1F, {{20, -10.0f, 10.0f}}}},
{"Had/hChi2NClHadITS", "had;Chi2_{ITS} Ncluster", {HistType::kTH1F, {{100, 0, 100.0f}}}},
{"Had/hHadronPt", "had; #it{p}_{T} (GeV/#it{c})", {HistType::kTH1F, {{120, -3.0f, 3.0f}}}},
{"Had/h2NsigmaHadronITS", "NsigmaHadron ITS distribution; #it{p}_{T}(GeV/#it{c}); n#sigma_{ITS}(had)", {HistType::kTH2F, {{100, -5.0f, 5.0f}, {200, -5.0f, 5.0f}}}},
{"Had/h2NsigmaHadronITS_preselection", "NsigmaHadron ITS distribution; #it{p}_{T} (GeV/#it{c}); n#sigma_{ITS}(had)", {HistType::kTH2F, {{100, -5.0f, 5.0f}, {400, -10.0f, 10.0f}}}},
{"Had/h2NsigmaHadronTPC", "NsigmaHadron TPC distribution; #it{p}_{T}(GeV/#it{c}); n#sigma_{TPC}(had)", {HistType::kTH2F, {{100, -5.0f, 5.0f}, {200, -5.0f, 5.0f}}}},
{"Had/h2NsigmaHadronTPC_preselection", "NsigmaHadron TPC distribution; #it{p}_{T} (GeV/#it{c}); n#sigma_{TPC}(had)", {HistType::kTH2F, {{100, -5.0f, 5.0f}, {400, -10.0f, 10.0f}}}},
{"Had/h2NsigmaHadronTPC_mcBackground", "NsigmaHadron TPC distribution; #it{p}_{T} (GeV/#it{c}); n#sigma_{TPC}(had)", {HistType::kTH2F, {{100, -5.0f, 5.0f}, {400, -10.0f, 10.0f}}}},
Expand Down Expand Up @@ -477,7 +480,7 @@
template <typename Ttrack>
float correctPtHe3TrackedAsTriton(const Ttrack& candidate)
{
if (candidate.pt() < 2.5 && candidate.pidForTracking() == o2::track::PID::Triton)

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
return candidate.pt() * 2. * (1. - kHePidTrkParams[0] - kHePidTrkParams[1] * candidate.pt() * 2.);

return candidate.pt() * 2.;
Expand Down Expand Up @@ -594,18 +597,16 @@
if (std::abs(nSigmaHe3) > settingCutNsigmaTPC) {
return false;
}
//
o2::aod::ITSResponse mResponseITS;

auto itsNsigmaHe3 = mResponseITS.nSigmaITS<o2::track::PID::Helium3>(candidate.itsClusterSizes(), 2 * candidate.p(), candidate.eta());
//
mQaRegistry.fill(HIST("He3/h2NSigmaHe3ITS_preselection"), candidate.sign() * 2 * candidate.pt(), itsNsigmaHe3);
mQaRegistry.fill(HIST("He3/h2NsigmaHe3ITS_preselection"), candidate.sign() * 2 * candidate.pt(), itsNsigmaHe3);
if (itsNsigmaHe3 < settingCutNsigmaITSHe3) {
return false;
}

mQaRegistry.fill(HIST("He3/h2dEdxHe3candidates"), candidate.sign() * correctedTPCinnerParam, candidate.tpcSignal());
mQaRegistry.fill(HIST("He3/h2NsigmaHe3TPC"), candidate.sign() * 2 * candidate.pt(), nSigmaHe3);
mQaRegistry.fill(HIST("He3/h2NSigmaHe3ITS"), candidate.sign() * 2 * candidate.pt(), itsNsigmaHe3);
mQaRegistry.fill(HIST("He3/h2NsigmaHe3ITS"), candidate.sign() * 2 * candidate.pt(), itsNsigmaHe3);
return true;
}

Expand Down Expand Up @@ -647,7 +648,7 @@
std::array<float, 3> collisionVertex = getCollisionVertex(collisions, collIdx);
const auto& pca = mFitter.getPCACandidate();
float distance = defaultTodistance;
for (int i = 0; i < 3; i++) {

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Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
distance += (pca[i] - collisionVertex[i]) * (pca[i] - collisionVertex[i]);
}
if (distanceMin < 0 || distance < distanceMin) {
Expand All @@ -669,7 +670,7 @@
std::array<float, 3> collisionVertex = getCollisionVertex(collisions, he3Hadcand.collisionID);

he3Hadcand.momHe3 = std::array{trackHe3.px(), trackHe3.py(), trackHe3.pz()};
for (int i = 0; i < 3; i++)

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
he3Hadcand.momHe3[i] = he3Hadcand.momHe3[i] * 2;
he3Hadcand.momHad = std::array{trackHad.px(), trackHad.py(), trackHad.pz()};
float invMass = CommonInite;
Expand Down Expand Up @@ -1333,35 +1334,43 @@
if (!selectTrack(track, Species::kHad))
continue;

if (selectDcaNsigmaCut(track, Species::kHad)) {
const float itsNSigmaHad = settingHadPDGCode == PDG_t::kProton ? mResponseITS.nSigmaITS<o2::track::PID::Proton>(track.itsClusterSizes(), track.p(), track.eta()) : mResponseITS.nSigmaITS<o2::track::PID::Pion>(track.itsClusterSizes(), track.p(), track.eta());
mQaRegistry.fill(HIST("Had/h2NsigmaHadronITS_preselection"), track.pt(), itsNSigmaHad);

if (selectDcaNsigmaCut(track, Species::kHad) && (itsNSigmaHad > settingCutNsigmaITSHad)) {

mQaRegistry.fill(HIST("Had/hHadronPt"), track.pt());
mQaRegistry.fill(HIST("Had/h2NsigmaHadronITS"), track.pt(), itsNSigmaHad);

const float tpcNSigmaHad = computeTPCNSigmaHadron(track);
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTPC_preselection"), track.tpcInnerParam(), tpcNSigmaHad);
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTPC_preselection"), track.pt(), tpcNSigmaHad);

if (track.hasTOF()) {
const float tofNSigmaHad = computeTOFNSigmaHadron(track);
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTOF_preselection"), track.pt(), tofNSigmaHad);
}
}

if (!selectTrack(track, Species::kHe3) || !selectDcaNsigmaCut(track, Species::kHe3))
continue;

const float ptHe3Corrected = correctPtHe3TrackedAsTriton(track);
const float itsNSigmaHe3 = mResponseITS.nSigmaITS<o2::track::PID::Helium3>(track.itsClusterSizes(), 2 * track.p(), track.eta());
mQaRegistry.fill(HIST("He3/h2NsigmaHe3ITS_preselection"), ptHe3Corrected, itsNSigmaHe3);

if (!selectTrack(track, Species::kHe3) || !selectDcaNsigmaCut(track, Species::kHe3) || (itsNSigmaHe3 < settingCutNsigmaITSHe3))
continue;

mQaRegistry.fill(HIST("He3/hHe3Pt"), ptHe3Corrected);
mQaRegistry.fill(HIST("He3/hDCAxyHe3"), track.dcaXY());
mQaRegistry.fill(HIST("He3/hDCAzHe3"), track.dcaZ());
mQaRegistry.fill(HIST("He3/h2NsigmaHe3ITS"), ptHe3Corrected, itsNSigmaHe3);

bool heliumPID = track.pidForTracking() == o2::track::PID::Helium3 || track.pidForTracking() == o2::track::PID::Alpha;
float correctedTPCinnerParam = (heliumPID && settingCompensatePIDinTracking) ? track.tpcInnerParam() / 2.f : track.tpcInnerParam();
if (correctedTPCinnerParam < settingCutRigidityMinHe3) {
continue;
}

const float nSigmaHe3 = computeNSigmaHe3(track);
mQaRegistry.fill(HIST("He3/h2NsigmaHe3TPC_preselection"), track.sign() * ptHe3Corrected, nSigmaHe3);
const float tpcNSigmaHe3 = computeNSigmaHe3(track);
mQaRegistry.fill(HIST("He3/h2NsigmaHe3TPC_preselection"), track.sign() * ptHe3Corrected, tpcNSigmaHe3);
}
}
PROCESS_SWITCH(he3HadronFemto, processPurity, "Process for purity studies", false);
Expand All @@ -1384,22 +1393,22 @@
mQaRegistry.fill(HIST("Had/hHadronPt"), track.pt());

const float tpcNSigmaHad = computeTPCNSigmaHadron(track);
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTPC_preselection"), track.sign() * track.tpcInnerParam(), tpcNSigmaHad);
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTPC_preselection"), track.sign() * track.pt(), tpcNSigmaHad);

if (std::abs(particle.pdgCode()) != settingHadPDGCode) {
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTPC_mcBackground"), track.sign() * track.tpcInnerParam(), tpcNSigmaHad);
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTPC_mcBackground"), track.sign() * track.pt(), tpcNSigmaHad);
} else {
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTPC_mcSignal"), track.sign() * track.tpcInnerParam(), tpcNSigmaHad);
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTPC_mcSignal"), track.sign() * track.pt(), tpcNSigmaHad);
}

if (track.hasTOF()) {
const float tofNSigmaHad = computeTOFNSigmaHadron(track);
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTOF_preselection"), track.sign() * track.pt(), tofNSigmaHad);

if (std::abs(particle.pdgCode()) != settingHadPDGCode) {
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTOF_mcBackground"), track.sign() * track.tpcInnerParam(), tofNSigmaHad);
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTOF_mcBackground"), track.sign() * track.pt(), tofNSigmaHad);
} else {
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTOF_mcSignal"), track.sign() * track.tpcInnerParam(), tofNSigmaHad);
mQaRegistry.fill(HIST("Had/h2NsigmaHadronTOF_mcSignal"), track.sign() * track.pt(), tofNSigmaHad);
}
}
}
Expand Down
2 changes: 1 addition & 1 deletion PWGLF/Tasks/Nuspex/nucleiFromHypertritonMap.cxx
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// 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 @@ -34,7 +34,7 @@
#include "ReconstructionDataFormats/PID.h"
#include "ReconstructionDataFormats/Track.h"

#include <TDatabasePDG.h>

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[pdg/database] 

Do not use TDatabasePDG directly. Use o2::constants::physics::Mass... or Service<o2::framework::O2DatabasePDG> instead.
#include <TMath.h>
#include <TPDGCode.h>
#include <TRandom.h>
Expand Down Expand Up @@ -73,7 +73,7 @@
true};

// Track Parameters
Configurable<int> min_ITS_nClusters{"min_ITS_nClusters", 7, "minimum number of found ITS clusters"};

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[name/configurable] 

Use lowerCamelCase for names of configurables and use the same name for the struct member as for the JSON string. (Declare the type and names on the same line.)
Configurable<int> min_ITS_InnerBarrel_nClusters{"min_ITS_InnerBarrel_nClusters", 1, "minimum number of found ITS Inner Barrel clusters"};
Configurable<int> max_ITS_InnerBarrel_nClusters{"max_ITS_InnerBarrel_nClusters", 3, "maximum number of found ITS Inner Barrel clusters"};
Configurable<int> min_TPC_nClusters{"min_TPC_nClusters", 100, "minimum number of found TPC clusters"};
Expand Down Expand Up @@ -216,7 +216,7 @@
}

const auto& mcparticle = track.mcParticle();
if (mcparticle.pdgCode() != mSelectedPDG) {
if (std::abs(mcparticle.pdgCode()) != mSelectedPDG) {
continue;
}

Expand All @@ -234,13 +234,13 @@
track.itsNClsInnerBarrel() > max_ITS_InnerBarrel_nClusters ||
track.tpcNClsFound() < min_TPC_nClusters ||
track.tpcNClsCrossedRows() < min_TPC_nCrossedRows ||
track.tpcNClsCrossedRows() < 0.8 * track.tpcNClsFindable() ||

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
track.tpcChi2NCl() > max_chi2_TPC ||
track.tpcChi2NCl() < min_chi2_TPC ||
track.eta() < min_eta || track.eta() > max_eta ||
dcaXY > max_dcaxy || dcaXY < -max_dcaxy ||
dcaZ > max_dcaz || dcaZ < -max_dcaz ||
track.itsChi2NCl() > 36.f) {

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[magic-number] 

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

Expand Down
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