[PWGLF] new analysis for pion and kaon using kink topology #11951
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| // Copyright 2019-2020 CERN and copyright holders of ALICE O2. | ||
| // See https://alice-o2.web.cern.ch/copyright for details of the copyright holders. | ||
| // All rights not expressly granted are reserved. | ||
| // | ||
| // This software is distributed under the terms of the GNU General Public | ||
| // License v3 (GPL Version 3), copied verbatim in the file "COPYING". | ||
| // | ||
| // In applying this license CERN does not waive the privileges and immunities | ||
| // granted to it by virtue of its status as an Intergovernmental Organization | ||
| // or submit itself to any jurisdiction. | ||
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| /// \file spectraKinkPiKa.cxx | ||
| /// \brief Example of a simple task for the analysis of the muon from Kaon pion using kink topology | ||
| /// \author | ||
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| #include "PWGLF/DataModel/LFKinkDecayTables.h" | ||
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| #include "Common/DataModel/EventSelection.h" | ||
| #include "Common/DataModel/PIDResponse.h" | ||
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| #include "Framework/AnalysisTask.h" | ||
| #include "Framework/O2DatabasePDGPlugin.h" | ||
| #include "Framework/runDataProcessing.h" | ||
| #include "ReconstructionDataFormats/PID.h" | ||
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| #include "Math/GenVector/Boost.h" | ||
| #include "Math/Vector3D.h" | ||
| #include "Math/Vector4D.h" | ||
| #include "TPDGCode.h" | ||
| #include "TVector3.h" | ||
| #include <TMath.h> | ||
| #include <TString.h> | ||
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| #include <cstdlib> | ||
| #include <vector> | ||
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| using namespace std; | ||
| using namespace o2; | ||
| using namespace o2::aod; | ||
| using namespace o2::framework; | ||
| using namespace o2::framework::expressions; | ||
| using namespace o2::constants::physics; | ||
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| using TracksFull = soa::Join<aod::TracksIU, aod::TracksExtra, aod::TracksCovIU, aod::pidTPCPi, aod::pidTPCKa, aod::pidTPCMu>; | ||
| using CollisionsFull = soa::Join<aod::Collisions, aod::EvSel>; | ||
| using CollisionsFullMC = soa::Join<aod::Collisions, aod::McCollisionLabels, aod::EvSel>; | ||
| struct spectraKinkPiKa { | ||
| Service<o2::framework::O2DatabasePDG> pdg; | ||
| // Histograms are defined with HistogramRegistry | ||
| HistogramRegistry rEventSelection{"eventSelection", {}, OutputObjHandlingPolicy::AnalysisObject, true, true}; | ||
| HistogramRegistry rpiKkink{"rpiKkink", {}, OutputObjHandlingPolicy::AnalysisObject, true, true}; | ||
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| // Configurable for event selection | ||
| Configurable<float> cutzvertex{"cutzvertex", 10.0f, "Accepted z-vertex range (cm)"}; | ||
| Configurable<float> cutNSigmaPi{"cutNSigmaPi", 4, "NSigmaTPCPion"}; | ||
| Configurable<float> cutNSigmaKa{"cutNSigmaKa", 4, "NSigmaTPCKaon"}; | ||
| Configurable<int> pid{"pidMother", 321, ""}; | ||
| Configurable<bool> d0pid{"dopid", 0, ""}; | ||
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| Preslice<aod::KinkCands> mPerCol = aod::track::collisionId; | ||
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| void init(InitContext const&) | ||
| { | ||
| // Axes | ||
| const AxisSpec ptAxis{100, 0, 10, "#it{p}_{T} (GeV/#it{c})"}; | ||
| const AxisSpec qtAxis{2000, 0, 2, "#it{q}_{T} (GeV/#it{c})"}; | ||
| const AxisSpec kinkAxis{200, 0, 4, "#theta"}; | ||
| const AxisSpec etaAxis{200, -5.0, 5.0, "#eta"}; | ||
| const AxisSpec vertexZAxis{100, -15., 15., "vrtx_{Z} [cm]"}; | ||
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| // Event selection | ||
| rEventSelection.add("hVertexZRec", "hVertexZRec", {HistType::kTH1F, {vertexZAxis}}); | ||
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| rpiKkink.add("h2_dau_pt_vs_eta_rec", "pt_vs_eta_dau", {HistType::kTH2F, {ptAxis, etaAxis}}); | ||
| rpiKkink.add("h2_moth_pt_vs_eta_rec", "pt_vs_eta_moth", {HistType::kTH2F, {ptAxis, etaAxis}}); | ||
| rpiKkink.add("h2_pt_moth_vs_dau_rec", "pt_moth_vs_dau", {HistType::kTH2F, {ptAxis, ptAxis}}); | ||
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| rpiKkink.add("h2_qt", "qt", {HistType::kTH1F, {qtAxis}}); | ||
| rpiKkink.add("h2_qt_vs_pt", "qt_pt", {HistType::kTH2F, {qtAxis, ptAxis}}); | ||
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| rpiKkink.add("h2_kink_angle", "kink angle", {HistType::kTH1F, {kinkAxis}}); | ||
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| // pion | ||
| rpiKkink.add("h2_dau_pt_vs_eta_rec_pion", "pt_vs_eta_dau", {HistType::kTH2F, {ptAxis, etaAxis}}); | ||
| rpiKkink.add("h2_moth_pt_vs_eta_rec_pion", "pt_vs_eta_moth", {HistType::kTH2F, {ptAxis, etaAxis}}); | ||
| rpiKkink.add("h2_pt_moth_vs_dau_rec_pion", "pt_moth_vs_dau", {HistType::kTH2F, {ptAxis, ptAxis}}); | ||
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| rpiKkink.add("h2_qt_pion", "qt", {HistType::kTH1F, {qtAxis}}); | ||
| rpiKkink.add("h2_qt_vs_ptpion", "qt_pt", {HistType::kTH2F, {qtAxis, ptAxis}}); | ||
| rpiKkink.add("h2_kink_angle_pion", "kink angle", {HistType::kTH1F, {kinkAxis}}); | ||
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| if (doprocessMC) { | ||
| rpiKkink.add("h2_dau_pt_vs_eta_gen", "pt_vs_eta_dau", {HistType::kTH2F, {ptAxis, etaAxis}}); | ||
| rpiKkink.add("h2_moth_pt_vs_eta_gen", "pt_vs_eta_moth", {HistType::kTH2F, {ptAxis, etaAxis}}); | ||
| rpiKkink.add("h2_pt_moth_vs_dau_gen", "pt_moth_vs_dau", {HistType::kTH2F, {ptAxis, ptAxis}}); | ||
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| rpiKkink.add("h2_qt_gen", "qt", {HistType::kTH1F, {qtAxis}}); | ||
| rpiKkink.add("h2_qt_rec", "qt", {HistType::kTH1F, {qtAxis}}); | ||
| rpiKkink.add("h2_kink_angle_gen", "kink angle", {HistType::kTH1F, {kinkAxis}}); | ||
| } | ||
| } | ||
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| void processData(CollisionsFull::iterator const& collision, aod::KinkCands const& KinkCands, TracksFull const&) | ||
| { | ||
| ROOT::Math::PxPyPzMVector v0; | ||
| ROOT::Math::PxPyPzMVector v1; | ||
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| if (std::abs(collision.posZ()) > cutzvertex || !collision.sel8() || !collision.selection_bit(aod::evsel::kNoSameBunchPileup)) { | ||
| return; | ||
| } | ||
| if (!collision.selection_bit(o2::aod::evsel::kNoTimeFrameBorder) || !collision.selection_bit(o2::aod::evsel::kNoITSROFrameBorder)) { | ||
| return; | ||
| } | ||
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| rEventSelection.fill(HIST("hVertexZRec"), collision.posZ()); | ||
| for (const auto& kinkCand : KinkCands) { | ||
| auto dauTrack = kinkCand.trackDaug_as<TracksFull>(); | ||
| auto mothTrack = kinkCand.trackMoth_as<TracksFull>(); | ||
| bool kaon = false; | ||
| bool pion = false; | ||
| if (abs(mothTrack.tpcNSigmaKa()) < cutNSigmaKa) { | ||
| kaon = true; | ||
| } | ||
| if (abs(mothTrack.tpcNSigmaPi()) < cutNSigmaPi) { | ||
| pion = true; | ||
| } | ||
| if (!kaon && !pion) | ||
| continue; | ||
| v0.SetCoordinates(mothTrack.px(), mothTrack.py(), mothTrack.pz(), o2::constants::physics::MassPionCharged); | ||
| v1.SetCoordinates(dauTrack.px(), dauTrack.py(), dauTrack.pz(), o2::constants::physics::MassMuon); | ||
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| float pMoth = v0.P(); | ||
| float pDaug = v1.P(); | ||
| float spKink = mothTrack.px() * dauTrack.px() + mothTrack.py() * dauTrack.py() + mothTrack.pz() * dauTrack.pz(); | ||
| float kink_angle = std::acos(spKink / (pMoth * pDaug)); | ||
| if (kaon) { | ||
| rpiKkink.fill(HIST("h2_moth_pt_vs_eta_rec"), v0.Pt(), v0.Eta()); | ||
| rpiKkink.fill(HIST("h2_dau_pt_vs_eta_rec"), v1.Pt(), v1.Eta()); | ||
| rpiKkink.fill(HIST("h2_pt_moth_vs_dau_rec"), v0.Pt(), v1.Pt()); | ||
| rpiKkink.fill(HIST("h2_kink_angle"), kink_angle); | ||
| } | ||
| if (pion) { | ||
| rpiKkink.fill(HIST("h2_moth_pt_vs_eta_rec_pion"), v0.Pt(), v0.Eta()); | ||
| rpiKkink.fill(HIST("h2_dau_pt_vs_eta_rec_pion"), v1.Pt(), v1.Eta()); | ||
| rpiKkink.fill(HIST("h2_pt_moth_vs_dau_rec_pion"), v0.Pt(), v1.Pt()); | ||
| rpiKkink.fill(HIST("h2_kink_angle_pion"), kink_angle); | ||
| } | ||
| ROOT::Math::Boost boost(-v0.BoostToCM()); | ||
| ROOT::Math::PxPyPzMVector dBoosted = boost(v1); | ||
| TVector3 p_d_rest(dBoosted.Px(), dBoosted.Py(), dBoosted.Pz()); // Daughter in mother rest frame | ||
| // Compute transverse component | ||
| TVector3 boostDir(v0.Px(), v0.Py(), v0.Pz()); | ||
| boostDir = boostDir.Unit(); | ||
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| double pt_d = p_d_rest.Perp(boostDir); // or p_d_rest.Mag() * sin(theta) | ||
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| if (kaon) { | ||
| rpiKkink.fill(HIST("h2_qt"), pt_d); | ||
| rpiKkink.fill(HIST("h2_qt_vs_pt"), pt_d, v1.Pt()); | ||
| } | ||
| if (pion) { | ||
| rpiKkink.fill(HIST("h2_qt_pion"), pt_d); | ||
| rpiKkink.fill(HIST("h2_qt_vs_ptpion"), pt_d, v1.Pt()); | ||
| } | ||
| } | ||
| } | ||
| PROCESS_SWITCH(spectraKinkPiKa, processData, "Data processing", true); | ||
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| void processMC(CollisionsFullMC const& collisions, aod::KinkCands const& KinkCands, aod::McTrackLabels const& trackLabelsMC, aod::McParticles const& particlesMC, TracksFull const&) | ||
| { | ||
| for (const auto& collision : collisions) { | ||
| ROOT::Math::PxPyPzMVector v0; | ||
| ROOT::Math::PxPyPzMVector v1; | ||
| if (std::abs(collision.posZ()) > cutzvertex || !collision.sel8() || !collision.selection_bit(aod::evsel::kNoSameBunchPileup)) { | ||
| continue; | ||
| } | ||
| if (!collision.selection_bit(o2::aod::evsel::kNoTimeFrameBorder) || !collision.selection_bit(o2::aod::evsel::kNoITSROFrameBorder)) { | ||
| continue; | ||
| } | ||
| rEventSelection.fill(HIST("hVertexZRec"), collision.posZ()); | ||
| auto kinkCandPerColl = KinkCands.sliceBy(mPerCol, collision.globalIndex()); | ||
| for (const auto& kinkCand : kinkCandPerColl) { | ||
| auto dauTrack = kinkCand.trackDaug_as<TracksFull>(); | ||
| auto mothTrack = kinkCand.trackMoth_as<TracksFull>(); | ||
| if (dauTrack.sign() != mothTrack.sign()) { | ||
| LOG(info) << "Skipping kink candidate with opposite sign daughter and mother: " << kinkCand.globalIndex(); | ||
| continue; // Skip if the daughter has the opposite sign as the mother | ||
| } | ||
| bool kaon = false; | ||
| bool pion = false; | ||
| if (abs(mothTrack.tpcNSigmaKa()) < cutNSigmaKa) { | ||
| kaon = true; | ||
| } | ||
| if (abs(mothTrack.tpcNSigmaPi()) < cutNSigmaPi) { | ||
| pion = true; | ||
| } | ||
| if (!kaon && !pion) | ||
| continue; | ||
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| v0.SetCoordinates(mothTrack.px(), mothTrack.py(), mothTrack.pz(), o2::constants::physics::MassPionCharged); | ||
| v1.SetCoordinates(dauTrack.px(), dauTrack.py(), dauTrack.pz(), o2::constants::physics::MassMuon); | ||
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| float pMoth = v0.P(); | ||
| float pDaug = v1.P(); | ||
| float spKink = mothTrack.px() * dauTrack.px() + mothTrack.py() * dauTrack.py() + mothTrack.pz() * dauTrack.pz(); | ||
| float kink_angle = std::acos(spKink / (pMoth * pDaug)); | ||
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| rpiKkink.fill(HIST("h2_moth_pt_vs_eta_rec"), v0.Pt(), v0.Eta()); | ||
| rpiKkink.fill(HIST("h2_dau_pt_vs_eta_rec"), v1.Pt(), v1.Eta()); | ||
| rpiKkink.fill(HIST("h2_pt_moth_vs_dau_rec"), v0.Pt(), v1.Pt()); | ||
| rpiKkink.fill(HIST("h2_kink_angle"), kink_angle); | ||
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| ROOT::Math::Boost boost(-v0.BoostToCM()); | ||
| ROOT::Math::PxPyPzMVector dBoosted = boost(v1); | ||
| TVector3 p_d_rest(dBoosted.Px(), dBoosted.Py(), dBoosted.Pz()); // Daughter in mother rest frame | ||
| // Compute transverse component | ||
| TVector3 boostDir(v0.Px(), v0.Py(), v0.Pz()); | ||
| boostDir = boostDir.Unit(); | ||
| double pt_d = p_d_rest.Perp(boostDir); // or p_d_rest.Mag() * sin(theta) | ||
| rpiKkink.fill(HIST("h2_qt"), pt_d); | ||
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| // do MC association | ||
| auto mcLabMoth = trackLabelsMC.rawIteratorAt(mothTrack.globalIndex()); | ||
| auto mcLabDau = trackLabelsMC.rawIteratorAt(dauTrack.globalIndex()); | ||
| if (mcLabMoth.has_mcParticle() && mcLabDau.has_mcParticle()) { | ||
| auto mcTrackMoth = mcLabMoth.mcParticle_as<aod::McParticles>(); | ||
| auto mcTrackDau = mcLabDau.mcParticle_as<aod::McParticles>(); | ||
| if (!mcTrackDau.has_mothers()) { | ||
| continue; | ||
| } | ||
| for (auto& piMother : mcTrackDau.mothers_as<aod::McParticles>()) { | ||
| if (piMother.globalIndex() != mcTrackMoth.globalIndex()) { | ||
| continue; | ||
| } | ||
| if (std::abs(mcTrackMoth.pdgCode()) != pid || std::abs(mcTrackDau.pdgCode()) != kMuonPlus) { | ||
| continue; | ||
| } | ||
| // rpiKkink.fill(HIST("h2MassPtMCRec"), kinkCand.ptMoth(), v1.Pt()); | ||
| rpiKkink.fill(HIST("h2_qt_rec"), pt_d); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| for (const auto& mcPart : particlesMC) { | ||
| ROOT::Math::PxPyPzMVector v0; | ||
| ROOT::Math::PxPyPzMVector v1; | ||
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| if (!d0pid && (std::abs(mcPart.pdgCode()) != pid || std::abs(mcPart.y()) > 0.8)) { | ||
| continue; | ||
| } | ||
| if (d0pid && (std::abs(mcPart.pdgCode()) != kD0 || std::abs(mcPart.pdgCode()) != kDPlus || std::abs(mcPart.pdgCode()) != kDStar || std::abs(mcPart.y()) > 0.8)) { | ||
| continue; | ||
| } | ||
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| if (!mcPart.has_daughters()) { | ||
| continue; // Skip if no daughters | ||
| } | ||
| bool hasKaonpionDaughter = false; | ||
| for (const auto& daughter : mcPart.daughters_as<aod::McParticles>()) { | ||
| if (std::abs(daughter.pdgCode()) == kMuonPlus) { // muon PDG code | ||
| hasKaonpionDaughter = true; | ||
| v1.SetCoordinates(daughter.px(), daughter.py(), daughter.pz(), o2::constants::physics::MassMuon); | ||
| break; // Found a muon daughter, exit loop | ||
| } | ||
| } | ||
| if (!hasKaonpionDaughter) { | ||
| continue; // Skip if no muon daughter found | ||
| } | ||
| if (pid == kKPlus) { | ||
| v0.SetCoordinates(mcPart.px(), mcPart.py(), mcPart.pz(), o2::constants::physics::MassKaonCharged); | ||
| } | ||
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| if (pid == kPiPlus) { | ||
| v0.SetCoordinates(mcPart.px(), mcPart.py(), mcPart.pz(), o2::constants::physics::MassPionCharged); | ||
| } | ||
| if (d0pid) { | ||
| v0.SetCoordinates(mcPart.px(), mcPart.py(), mcPart.pz(), o2::constants::physics::MassD0); | ||
| } | ||
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| float pMoth = v0.P(); | ||
| float pDaug = v1.P(); | ||
| float spKink = v0.Px() * v1.Px() + v0.Py() * v1.Py() + v0.Pz() * v0.Pz(); | ||
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| float kink_angle = std::acos(spKink / (pMoth * pDaug)); | ||
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| // std::cout<< kinkCand.ptMoth()<<" check "<<v0.Pt()<<std::endl; | ||
| rpiKkink.fill(HIST("h2_moth_pt_vs_eta_gen"), v0.Pt(), v0.Eta()); | ||
| rpiKkink.fill(HIST("h2_dau_pt_vs_eta_gen"), v1.Pt(), v1.Eta()); | ||
| rpiKkink.fill(HIST("h2_pt_moth_vs_dau_gen"), v0.Pt(), v1.Pt()); | ||
| rpiKkink.fill(HIST("h2_kink_angle_gen"), kink_angle); | ||
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| ROOT::Math::Boost boost(-v0.BoostToCM()); | ||
| ROOT::Math::PxPyPzMVector dBoosted = boost(v1); | ||
| TVector3 p_d_rest(dBoosted.Px(), dBoosted.Py(), dBoosted.Pz()); // Daughter in mother rest frame | ||
| // Compute transverse component | ||
| TVector3 boostDir(v0.Px(), v0.Py(), v0.Pz()); | ||
| boostDir = boostDir.Unit(); | ||
| double pt_d = p_d_rest.Perp(boostDir); // or p_d_rest.Mag() * sin(theta) | ||
| rpiKkink.fill(HIST("h2_qt_gen"), pt_d); | ||
| } | ||
| } | ||
| PROCESS_SWITCH(spectraKinkPiKa, processMC, "MC processing", false); | ||
| }; | ||
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| WorkflowSpec defineDataProcessing(ConfigContext const& cfgc) | ||
| { | ||
| return WorkflowSpec{ | ||
| adaptAnalysisTask<spectraKinkPiKa>(cfgc)}; | ||
| } | ||
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