[PWGDQ] Add J/psi-muon correlations task #17059
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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. | ||
| // | ||
| /// \file jPsiMuonCorrelations.cxx | ||
| /// \brief Task to perform correlations between J/Psi candidates and single muon tracks | ||
| /// \author Kaare Endrup Iversen <kaare.endrup.iversen@cern.ch> Lund University | ||
| // | ||
| #include "PWGDQ/Core/VarManager.h" | ||
| #include "PWGDQ/DataModel/ReducedInfoTables.h" | ||
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| #include "Common/Core/RecoDecay.h" | ||
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| #include <CCDB/BasicCCDBManager.h> | ||
| #include <CommonConstants/MathConstants.h> | ||
| #include <CommonConstants/PhysicsConstants.h> | ||
| #include <Framework/AnalysisDataModel.h> | ||
| #include <Framework/AnalysisHelpers.h> | ||
| #include <Framework/AnalysisTask.h> | ||
| #include <Framework/Configurable.h> | ||
| #include <Framework/HistogramRegistry.h> | ||
| #include <Framework/HistogramSpec.h> | ||
| #include <Framework/InitContext.h> | ||
| #include <Framework/runDataProcessing.h> | ||
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| #include <chrono> | ||
| #include <cmath> | ||
| #include <cstddef> | ||
| #include <cstdint> | ||
| #include <string> | ||
| #include <vector> | ||
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| using std::string; | ||
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| using namespace o2; | ||
| using namespace o2::framework; | ||
| using namespace o2::framework::expressions; | ||
| using namespace o2::aod; | ||
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| // Some definitions | ||
| namespace o2::aod | ||
| { | ||
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| namespace dqanalysisflags | ||
| { | ||
| DECLARE_SOA_BITMAP_COLUMN(IsEventSelected, isEventSelected, 8); //! Event decision | ||
| DECLARE_SOA_BITMAP_COLUMN(IsMuonSelected, isMuonSelected, 32); //! Muon track decisions (joinable to ReducedMuonsAssoc) | ||
| } // namespace dqanalysisflags | ||
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| DECLARE_SOA_TABLE(EventCuts, "AOD", "DQANAEVCUTSA", dqanalysisflags::IsEventSelected); //! joinable to ReducedEvents | ||
| DECLARE_SOA_TABLE(MuonTrackCuts, "AOD", "DQANAMUONCUTSA", dqanalysisflags::IsMuonSelected); //! joinable to ReducedMuonsAssoc | ||
| } // namespace o2::aod | ||
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| // Declarations of various short names | ||
| using MyEvents = soa::Join<aod::ReducedEvents, aod::ReducedEventsExtended>; | ||
| using MyEventsSelected = soa::Join<aod::ReducedEvents, aod::ReducedEventsExtended, aod::EventCuts>; | ||
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| // using MyPairCandidatesSelected = soa::Join<aod::Dimuons, aod::DimuonsExtra>; | ||
| using MyPairCandidatesSelected = soa::Join<aod::Dimuons, aod::DimuonsExtra, aod::DimuonsAll>; | ||
| using MyMuonTracks = soa::Join<aod::ReducedMuons, aod::ReducedMuonsExtra>; | ||
| using MyMuonAssocsSelected = soa::Join<aod::ReducedMuonsAssoc, aod::MuonTrackCuts>; | ||
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| // bit maps used for the Fill functions of the VarManager | ||
| constexpr static uint32_t GkEventFillMap = VarManager::ObjTypes::ReducedEvent | VarManager::ObjTypes::ReducedEventExtended; | ||
| constexpr static uint32_t GkMuonFillMap = VarManager::ObjTypes::ReducedMuon | VarManager::ObjTypes::ReducedMuonExtra; | ||
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| // Declare helper function | ||
| double getRapidity(const double pT, const double eta); | ||
| double getWeight(const double pT, const std::vector<double>& binsPT, const std::vector<double>& efficiency, const double etaMin, const double etaMax); | ||
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| struct DqJPsiMuonCorrelations { | ||
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| // Configurables for the dilepton signal region | ||
| Configurable<float> fConfigDileptonLowMass{"fConfigDileptonLowMass", 2.8, "Low mass cut for the dileptons used in analysis"}; | ||
| Configurable<float> fConfigDileptonHighMass{"fConfigDileptonHighMass", 3.4, "High mass cut for the dileptons used in analysis"}; | ||
| Configurable<float> fConfigBackgroundLowMass{"fConfigBackgroundLowMass", 2.5, "Low mass cut for the background used in analysis"}; | ||
| Configurable<float> fConfigBackgroundHighMass{"fConfigBackgroundHighMass", 3.7, "High mass cut for the background used in analysis"}; | ||
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| // Configurables for the dilepton and associated muon cuts | ||
| Configurable<float> fConfigDileptonPtMin{"fConfigDileptonPtMin", 1.0, "Minimum pT cut for the dilepton"}; | ||
| Configurable<float> fConfigDileptonPtMax{"fConfigDileptonPtMax", 20.0, "Maximum pT cut for the dilepton"}; | ||
| Configurable<float> fConfigDileptonEtaMin{"fConfigDileptonEtaMin", -4.0, "Minimum eta cut for the dileptons"}; | ||
| Configurable<float> fConfigDileptonEtaMax{"fConfigDileptonEtaMax", -2.5, "Maximum eta cut for the dileptons"}; | ||
| Configurable<float> fConfigMuonEtaMin{"fConfigMuonEtaMin", -4.0, "Minimum eta cut for the associated muons"}; | ||
| Configurable<float> fConfigMuonEtaMax{"fConfigMuonEtaMax", -2.5, "Maximum eta cut for the associated muons"}; | ||
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| // Configurables for histograms | ||
| ConfigurableAxis axisPt{"axisPt", {VARIABLE_WIDTH, 1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f, 10.0f, 12.0f, 14.0f, 16.0f, 18.0f, 20.0f}, "p_{T} (GeV/c)"}; | ||
| ConfigurableAxis axisInvMass{"axisInvMass", {80, 1.0f, 5.0f}, "Invariant Mass (GeV/c^{2})"}; | ||
| ConfigurableAxis axisDeltaPhi{"axisDeltaPhi", {10, -constants::math::PIHalf, 3.0f * constants::math::PIHalf}, "#Delta#phi (rad)"}; | ||
| ConfigurableAxis axisDeltaEta{"axisDeltaEta", {10, -2.0f, 2.0f}, "#Delta#eta"}; | ||
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| // Configurable for acceptance efficiency correction | ||
| Configurable<std::vector<double>> fConfigBinEffJPsi{"fConfigBinEffJPsi", std::vector<double>{1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f}, "acceptance efficiency correction factors for each pT bin"}; | ||
| Configurable<std::vector<double>> fConfigBinEffMuon{"fConfigBinEffMuon", std::vector<double>{1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f}, "acceptance efficiency correction factors for each pT bin"}; | ||
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| // Connect to ccdb | ||
| Service<ccdb::BasicCCDBManager> ccdb{}; | ||
| Configurable<int64_t> ccdbNoLaterThan{"ccdbNoLaterThan", std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count(), "latest acceptable timestamp of creation for the object"}; | ||
| Configurable<std::string> ccdbUrl{"ccdbUrl", "http://ccdb-test.cern.ch:8080", "url of the ccdb repository"}; | ||
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| // Define the filter for events | ||
| Filter eventFilter = aod::dqanalysisflags::isEventSelected == 1; | ||
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| // Define the filter for the dileptons | ||
| Filter dileptonFilter = aod::reducedpair::sign == 0; | ||
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| constexpr static uint32_t FgDimuonsFillMap = VarManager::ObjTypes::ReducedMuon | VarManager::ObjTypes::Pair; // fill map | ||
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| // use two values array to avoid mixing up the quantities | ||
| std::vector<float> fValuesDilepton; | ||
| std::vector<float> fValuesMuon; | ||
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| HistogramRegistry registry{"registry"}; | ||
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| void init(o2::framework::InitContext&) | ||
| { | ||
| ccdb->setURL(ccdbUrl.value); | ||
| ccdb->setCaching(true); | ||
| ccdb->setCreatedNotAfter(ccdbNoLaterThan.value); | ||
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| // Assert correct size of the efficiency correction vector | ||
| uint8_t nAxisPtBins = axisPt.value.size() - 2; | ||
| if (nAxisPtBins != fConfigBinEffJPsi.value.size() || nAxisPtBins != fConfigBinEffMuon.value.size()) { | ||
| LOGF(fatal, "Configurables axisPt: %zu must have one more value than fConfigBinEffJPsi: %zu and fConfigBinEffMuon: %zu (excluding 'VARIABLE_WIDTH' entry)", | ||
| axisPt.value.size() - 1, fConfigBinEffJPsi.value.size(), fConfigBinEffMuon.value.size()); | ||
| } | ||
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| fValuesDilepton.resize(VarManager::kNVars, 0.0f); | ||
| fValuesMuon.resize(VarManager::kNVars, 0.0f); | ||
| VarManager::SetDefaultVarNames(); | ||
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| // Define trigger histograms | ||
| ConfigurableAxis axisTriggerMass{"axisTriggerMass", {VARIABLE_WIDTH, fConfigBackgroundLowMass, fConfigDileptonLowMass, fConfigDileptonHighMass, fConfigBackgroundHighMass}, "Invariant Mass (GeV/c^{2}) for trigger counting"}; | ||
| registry.add("h2dDimuonPtInvVsInvMass", "h2dDimuonPtInvVsInvMass", kTH2D, {axisInvMass, axisPt}); | ||
| registry.add("h2dTriggersPtInvVsInvMassRegion", "h2dTriggersPtInvVsInvMassRegion", kTH2D, {axisTriggerMass, axisPt}); | ||
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| // Define histograms for the dilepton-muon correlations | ||
| registry.add("h2dDimuonMuonDeltaEtaVsMuonPtSignal", "h2dDimuonMuonDeltaEtaVsMuonPtSignal", kTH2D, {axisDeltaEta, axisPt}); | ||
| registry.add("h2dDimuonMuonDeltaPhiVsMuonPtSignal", "h2dDimuonMuonDeltaPhiVsMuonPtSignal", kTH2D, {axisDeltaPhi, axisPt}); | ||
| registry.add("h2dDimuonMuonDeltaEtaVsMuonPtBackground", "h2dDimuonMuonDeltaEtaVsMuonPtBackground", kTH2D, {axisDeltaEta, axisPt}); | ||
| registry.add("h2dDimuonMuonDeltaPhiVsMuonPtBackground", "h2dDimuonMuonDeltaPhiVsMuonPtBackground", kTH2D, {axisDeltaPhi, axisPt}); | ||
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| // QA histograms | ||
| registry.add("hEventPosZMuon", "hEventPosZMuon", kTH1D, {{50, -25, 25}}); | ||
| } | ||
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| // Template function to run pair - muon combinations | ||
| template <int TCandidateType, uint32_t TEventFillMap, uint32_t TMuonFillMap, typename TEvent, typename TMuonAssocs, typename TMuonTracks, typename TDileptons> | ||
| void runDileptonMuon(TEvent const& event, TMuonAssocs const& assocs, TMuonTracks const& /*tracks*/, TDileptons const& dileptons) | ||
| { | ||
| VarManager::ResetValues(0, VarManager::kNVars, fValuesMuon.data()); | ||
| VarManager::ResetValues(0, VarManager::kNVars, fValuesDilepton.data()); | ||
| VarManager::FillEvent<TEventFillMap>(event, fValuesMuon.data()); | ||
| VarManager::FillEvent<TEventFillMap>(event, fValuesDilepton.data()); | ||
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| if (!event.isEventSelected_bit(0)) { | ||
| return; | ||
| } | ||
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| if (assocs.size() > 0) { | ||
| registry.fill(HIST("hEventPosZMuon"), event.posZ()); | ||
| } | ||
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| if (dileptons.size() > 0) { | ||
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| for (const auto& dilepton : dileptons) { | ||
| VarManager::FillTrack<FgDimuonsFillMap>(dilepton, fValuesDilepton.data()); | ||
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| // Dilepton kinematic cuts | ||
| if ((dilepton.eta() < fConfigDileptonEtaMin || dilepton.eta() > fConfigDileptonEtaMax) || | ||
| (dilepton.pt() < fConfigDileptonPtMin || dilepton.pt() > fConfigDileptonPtMax)) { | ||
| continue; | ||
| } | ||
| // Dilepton leg kinematic cuts | ||
| if ((dilepton.eta1() < fConfigMuonEtaMin || dilepton.eta1() > fConfigMuonEtaMax) || | ||
| (dilepton.pt1() < axisPt.value[1] || dilepton.pt1() > axisPt.value.back()) || | ||
| (dilepton.eta2() < fConfigMuonEtaMin || dilepton.eta2() > fConfigMuonEtaMax) || | ||
| (dilepton.pt2() < axisPt.value[1] || dilepton.pt2() > axisPt.value.back())) { | ||
| continue; | ||
| } | ||
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| // Fill invariant mass vs pT histogram for the dileptons and for trigger counting | ||
| double weightDilepton = getWeight(dilepton.pt(), axisPt.value, fConfigBinEffJPsi.value, fConfigDileptonEtaMin, fConfigDileptonEtaMax); | ||
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| registry.fill(HIST("h2dDimuonPtInvVsInvMass"), dilepton.mass(), dilepton.pt(), weightDilepton); | ||
| registry.fill(HIST("h2dTriggersPtInvVsInvMassRegion"), dilepton.mass(), dilepton.pt(), weightDilepton); | ||
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| for (const auto& assoc : assocs) { | ||
| // Check selection bit | ||
| if (!assoc.isMuonSelected_bit(0)) { | ||
| continue; | ||
| } | ||
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| // Skip associated muons that are part of the dilepton candidate | ||
| if (dilepton.index0Id() == assoc.reducedmuonId() || dilepton.index1Id() == assoc.reducedmuonId()) { | ||
| continue; | ||
| } | ||
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| // Get muon track information | ||
| auto track = assoc.template reducedmuon_as<TMuonTracks>(); | ||
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| // Muon kinematic cuts | ||
| if ((track.eta() < fConfigMuonEtaMin || track.eta() > fConfigMuonEtaMax) || | ||
| (track.pt() < axisPt.value[1] || track.pt() > axisPt.value.back())) { | ||
| continue; | ||
| } | ||
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| // Compute deltaEta and deltaPhi between the dilepton and the associated muon | ||
| float deltaEta = dilepton.eta() - track.eta(); | ||
| float deltaPhi = RecoDecay::constrainAngle(dilepton.phi() - track.phi(), -constants::math::PIHalf); | ||
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| // Fill signal and background histograms based on the dilepton mass | ||
| double weightMuon = getWeight(track.pt(), axisPt.value, fConfigBinEffMuon.value, fConfigMuonEtaMin, fConfigMuonEtaMax); | ||
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| if (dilepton.mass() > fConfigDileptonLowMass && dilepton.mass() < fConfigDileptonHighMass) { | ||
| registry.fill(HIST("h2dDimuonMuonDeltaEtaVsMuonPtSignal"), deltaEta, track.pt(), weightDilepton * weightMuon); | ||
| registry.fill(HIST("h2dDimuonMuonDeltaPhiVsMuonPtSignal"), deltaPhi, track.pt(), weightDilepton * weightMuon); | ||
| } else if (dilepton.mass() > fConfigBackgroundLowMass && dilepton.mass() < fConfigBackgroundHighMass) { | ||
| registry.fill(HIST("h2dDimuonMuonDeltaEtaVsMuonPtBackground"), deltaEta, track.pt(), weightDilepton * weightMuon); | ||
| registry.fill(HIST("h2dDimuonMuonDeltaPhiVsMuonPtBackground"), deltaPhi, track.pt(), weightDilepton * weightMuon); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| void processSkimmedDimuon(MyEventsSelected::iterator const& event, MyMuonAssocsSelected const& muonassocs, MyMuonTracks const& muontracks, soa::Filtered<MyPairCandidatesSelected> const& dileptons) | ||
| { | ||
| runDileptonMuon<VarManager::kDecayToMuMu, GkEventFillMap, GkMuonFillMap>(event, muonassocs, muontracks, dileptons); | ||
| } | ||
| void processDummy(MyEvents const&) | ||
| { | ||
| } | ||
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| PROCESS_SWITCH(DqJPsiMuonCorrelations, processSkimmedDimuon, "Run dilepton-muon pairing, using skimmed data", false); | ||
| PROCESS_SWITCH(DqJPsiMuonCorrelations, processDummy, "Dummy function", false); | ||
| }; | ||
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| WorkflowSpec defineDataProcessing(ConfigContext const& cfgc) | ||
| { | ||
| return WorkflowSpec{ | ||
| adaptAnalysisTask<DqJPsiMuonCorrelations>(cfgc)}; | ||
| } | ||
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| double getWeight(const double pT, const std::vector<double>& binsPT, const std::vector<double>& efficiency, const double etaMin, const double etaMax) | ||
| { | ||
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| int binEff = -1; | ||
| for (size_t b = 0; b < binsPT.size() - 1; ++b) { | ||
| // Shift pT index by one to account for the VARIABLE_WIDTH entry in the axis configuration | ||
| if (pT >= binsPT[b + 1] && pT < binsPT[b + 2]) { | ||
| binEff = b; | ||
| break; | ||
| } | ||
| } | ||
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| if (binEff == -1) { | ||
| LOGF(warn, "pT value %f is outside the defined pT bins", pT); | ||
| return 0.0; | ||
| } | ||
| return 1.0 / (efficiency[binEff] * (RecoDecayPtEtaPhi::y(pT, etaMax, o2::constants::physics::MassJPsi) - RecoDecayPtEtaPhi::y(pT, etaMin, o2::constants::physics::MassJPsi))); | ||
| } | ||
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