[ALICE3] Added Multiplicity estimator task for ALICE3 #17540
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| // Copyright 2019-2026 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. | ||
| // | ||
| /// \author Alexander Tiekoetter <alexander.tiekoetter@cern.ch>, Muenster | ||
| /// \brief Multiplicity task for ALICE3 | ||
| /// \file alice3Multiplicity.cxx | ||
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| #include "ALICE3/DataModel/collisionAlice3.h" | ||
| #include "ALICE3/DataModel/tracksAlice3.h" | ||
| #include "Common/DataModel/Multiplicity.h" | ||
| #include "Common/DataModel/TrackSelectionTables.h" | ||
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| #include <Framework/ASoA.h> | ||
| #include <Framework/AnalysisDataModel.h> | ||
| #include <Framework/AnalysisHelpers.h> | ||
| #include <Framework/AnalysisTask.h> | ||
| #include <Framework/Configurable.h> | ||
| #include <Framework/Expressions.h> | ||
| #include <Framework/HistogramRegistry.h> | ||
| #include <Framework/HistogramSpec.h> | ||
| #include <Framework/InitContext.h> | ||
| #include <Framework/O2DatabasePDGPlugin.h> | ||
| #include <Framework/OutputObjHeader.h> | ||
| #include <Framework/runDataProcessing.h> | ||
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| #include <TH1.h> | ||
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| #include <cmath> | ||
| #include <cstdlib> | ||
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| using namespace o2; | ||
| using namespace o2::framework; | ||
| using namespace o2::framework::expressions; | ||
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| using TracksAlice3 = soa::Join<aod::Tracks, aod::TracksDCA, o2::aod::TracksAlice3, aod::TracksExtraA3>; | ||
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| struct Alice3Multiplicity { | ||
| Produces<aod::PVMults> multPV; | ||
| Produces<aod::MultsGlobal> multGlobal; | ||
| Produces<aod::MultsMCAlice3> multMC; | ||
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| HistogramRegistry histos{"Histos", {}, OutputObjHandlingPolicy::AnalysisObject}; | ||
| Configurable<float> minEta{"minEta", -2.5f, "Minimum eta in range for global track counting"}; | ||
| Configurable<float> maxEta{"maxEta", 2.5f, "Maximum eta in range for global track counting"}; | ||
| Configurable<float> maxDCAxy{"maxDCAxy", 0.0025f, "Max DCAxy for global track counting"}; | ||
| Configurable<float> maxDCAz{"maxDCAz", 0.0025f, "Max DCAz for global track counting"}; | ||
| Configurable<int> minSiliconHits{"minSiliconHits", 5, "Minimum number of hits in silicon detector for global track counting"}; | ||
| Configurable<bool> requireReconstructed{"requireReconstructed", false, "Require track to be reconstructed for global track counting"}; | ||
| Configurable<bool> doQA{"doQA", true, "Fill QA histograms"}; | ||
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| ConfigurableAxis axisMult{"axisMult", {10000, 0, 10000}, "Reconstructed tracks"}; | ||
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| Service<o2::framework::O2DatabasePDG> pdg; | ||
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| Filter trackFilter = (aod::track::eta >= minEta) && (aod::track::eta <= maxEta) && (nabs(aod::track::dcaXY) <= maxDCAxy) && (nabs(aod::track::dcaZ) <= maxDCAz) && (aod::track_alice3::nSiliconHits >= minSiliconHits) && (!requireReconstructed || aod::track_alice3::isReconstructed); | ||
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| void init(InitContext&) | ||
| { | ||
| if (doQA) { | ||
| histos.add("multiplicity/nTracksPV", "nTracksPV", kTH1D, {axisMult}); | ||
| histos.add("multiplicity/nTracksPVeta1", "nTracksPVeta1", kTH1D, {axisMult}); | ||
| histos.add("multiplicity/nTracksPVetaHalf", "nTracksPVetaHalf", kTH1D, {axisMult}); | ||
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| histos.add("multiplicity/nTracksGlobal", "nTracksGlobal", kTH1D, {axisMult}); | ||
| histos.add("multiplicity/nTracksGlobalPV", "nTracksGlobalPV", kTH1D, {axisMult}); | ||
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| histos.add("multiplicity/nTracksMC", "nTracksMC", kTH1D, {axisMult}); | ||
| histos.add("multiplicity/nTracksMCEta25", "nTracksMCEta25", kTH1D, {axisMult}); | ||
| histos.add("multiplicity/nTracksMCEta125", "nTracksMCEta125", kTH1D, {axisMult}); | ||
| histos.add("multiplicity/nTracksMCEta09", "nTracksMCEta09", kTH1D, {axisMult}); | ||
| } | ||
| } | ||
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| void processGlobalTracks(const aod::Collision& /*collision*/, const soa::Filtered<TracksAlice3>& tracks) | ||
| { | ||
| int globalTracks = 0; | ||
| int globalTracksPV = 0; | ||
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| for (const auto& track : tracks) { | ||
| ++globalTracks; | ||
| if (track.isPVContributor()) | ||
| ++globalTracksPV; | ||
| } | ||
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| if (doQA) { | ||
| histos.fill(HIST("multiplicity/nTracksGlobal"), globalTracks); | ||
| histos.fill(HIST("multiplicity/nTracksGlobalPV"), globalTracksPV); | ||
| } | ||
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| multGlobal(globalTracks, globalTracksPV, 0, 0); | ||
| } | ||
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| void processPV(const aod::Collision& /*collision*/, const TracksAlice3& tracks) | ||
| { | ||
| int numTracksPV = 0; | ||
| int numTracksPVeta1 = 0; | ||
| int numTracksPVetaHalf = 0; | ||
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| for (const auto& track : tracks) { | ||
| if (track.isPVContributor()) { | ||
| ++numTracksPV; | ||
| if (std::abs(track.eta()) < 1.0) | ||
| ++numTracksPVeta1; | ||
| if (std::abs(track.eta()) < 0.5) | ||
| ++numTracksPVetaHalf; | ||
| } | ||
| } | ||
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| if (doQA) { | ||
| histos.fill(HIST("multiplicity/nTracksPV"), numTracksPV); | ||
| histos.fill(HIST("multiplicity/nTracksPVeta1"), numTracksPVeta1); | ||
| histos.fill(HIST("multiplicity/nTracksPVetaHalf"), numTracksPVetaHalf); | ||
| } | ||
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| multPV(numTracksPV, numTracksPVeta1, numTracksPVetaHalf); | ||
| } | ||
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| void processMC(aod::McCollision const& /*mcCollision*/, aod::McParticles const& mcParticles) | ||
| { | ||
| int numMCParticles = 0; | ||
| int numMCParticlesEta25 = 0; | ||
| int numMCParticlesEta125 = 0; | ||
| int numMCParticlesEta09 = 0; | ||
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| for (const auto& mcParticle : mcParticles) { | ||
| if (!mcParticle.isPhysicalPrimary()) { | ||
| continue; | ||
| } | ||
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| auto charge = 0.; | ||
| auto* p = pdg->GetParticle(mcParticle.pdgCode()); | ||
| if (p != nullptr) { | ||
|
Collaborator
There was a problem hiding this comment. for counting particles we can use https://github.com/AliceO2Group/O2Physics/blob/master/PWGLF/Utils/inelGt.h#L96 |
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| charge = p->Charge(); | ||
| } | ||
| if (std::abs(charge) < 1e-3) { | ||
| continue; | ||
| } | ||
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| ++numMCParticles; | ||
| if (std::abs(mcParticle.eta()) < 2.5) | ||
| ++numMCParticlesEta25; | ||
| if (std::abs(mcParticle.eta()) < 1.25) | ||
| ++numMCParticlesEta125; | ||
| if (std::abs(mcParticle.eta()) < 0.9) | ||
| ++numMCParticlesEta09; | ||
| } | ||
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| if (doQA) { | ||
| histos.fill(HIST("multiplicity/nTracksMC"), numMCParticles); | ||
| histos.fill(HIST("multiplicity/nTracksMCEta25"), numMCParticlesEta25); | ||
| histos.fill(HIST("multiplicity/nTracksMCEta125"), numMCParticlesEta125); | ||
| histos.fill(HIST("multiplicity/nTracksMCEta09"), numMCParticlesEta09); | ||
| } | ||
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| multMC(numMCParticles, numMCParticlesEta25, numMCParticlesEta125, numMCParticlesEta09); | ||
| } | ||
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| void processDummy(const aod::Collision&) | ||
|
Collaborator
There was a problem hiding this comment. why do you need the dummy? |
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| { | ||
| // do nothing | ||
| } | ||
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| PROCESS_SWITCH(Alice3Multiplicity, processGlobalTracks, "Process global track counter", false); | ||
| PROCESS_SWITCH(Alice3Multiplicity, processPV, "Process primary vertex contributor tracks", false); | ||
| PROCESS_SWITCH(Alice3Multiplicity, processMC, "Process MC truth information", false); | ||
| PROCESS_SWITCH(Alice3Multiplicity, processDummy, "Dummy proccess function", true); | ||
| }; | ||
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| WorkflowSpec defineDataProcessing(ConfigContext const& cfgc) | ||
| { | ||
| return WorkflowSpec{adaptAnalysisTask<Alice3Multiplicity>(cfgc)}; | ||
| } | ||
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shouldn't it be only if the track is a contributor?