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| 1 | +// Copyright 2019-2020 CERN and copyright holders of ALICE O2. |
| 2 | +// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders. |
| 3 | +// All rights not expressly granted are reserved. |
| 4 | +// |
| 5 | +// This software is distributed under the terms of the GNU General Public |
| 6 | +// License v3 (GPL Version 3), copied verbatim in the file "COPYING". |
| 7 | +// |
| 8 | +// In applying this license CERN does not waive the privileges and immunities |
| 9 | +// granted to it by virtue of its status as an Intergovernmental Organization |
| 10 | +// or submit itself to any jurisdiction. |
| 11 | + |
| 12 | +/// \file flowMcUpc.cxx |
| 13 | +/// \author Zhiyong Lu (zhiyong.lu@cern.ch), Yongxi Du (yongxi.du@cern.ch) |
| 14 | +/// \since Apr/2/2026 |
| 15 | +/// \brief flow efficiency analysis on UPC MC |
| 16 | + |
| 17 | +#include "PWGUD/Core/SGSelector.h" |
| 18 | +#include "PWGUD/DataModel/UDTables.h" |
| 19 | + |
| 20 | +#include "Common/Core/RecoDecay.h" |
| 21 | +#include "Common/Core/TrackSelection.h" |
| 22 | +#include "Common/Core/TrackSelectionDefaults.h" |
| 23 | +#include "Common/Core/trackUtilities.h" |
| 24 | +#include "Common/DataModel/TrackSelectionTables.h" |
| 25 | + |
| 26 | +#include <CCDB/BasicCCDBManager.h> |
| 27 | +#include <CommonConstants/MathConstants.h> |
| 28 | +#include <CommonConstants/PhysicsConstants.h> |
| 29 | +#include <Framework/ASoAHelpers.h> |
| 30 | +#include <Framework/AnalysisDataModel.h> |
| 31 | +#include <Framework/AnalysisTask.h> |
| 32 | +#include <Framework/HistogramRegistry.h> |
| 33 | +#include <Framework/RunningWorkflowInfo.h> |
| 34 | +#include <Framework/runDataProcessing.h> |
| 35 | +#include <ReconstructionDataFormats/Track.h> |
| 36 | + |
| 37 | +#include <TPDGCode.h> |
| 38 | + |
| 39 | +#include <string> |
| 40 | +#include <vector> |
| 41 | + |
| 42 | +using namespace o2; |
| 43 | +using namespace o2::framework; |
| 44 | +using namespace o2::framework::expressions; |
| 45 | + |
| 46 | +#define O2_DEFINE_CONFIGURABLE(NAME, TYPE, DEFAULT, HELP) Configurable<TYPE> NAME{#NAME, DEFAULT, HELP}; |
| 47 | + |
| 48 | +struct FlowMcUpc { |
| 49 | + HistogramRegistry histos{"Histos", {}, OutputObjHandlingPolicy::AnalysisObject}; |
| 50 | + |
| 51 | + Configurable<float> minB{"minB", 0.0f, "min impact parameter"}; |
| 52 | + Configurable<float> maxB{"maxB", 20.0f, "max impact parameter"}; |
| 53 | + O2_DEFINE_CONFIGURABLE(cfgCutVertex, float, 10.0f, "Accepted z-vertex range") |
| 54 | + O2_DEFINE_CONFIGURABLE(cfgCutEta, float, 0.8f, "Eta range for tracks") |
| 55 | + O2_DEFINE_CONFIGURABLE(cfgPtCutMin, float, 0.1f, "Minimal pT for tracks") |
| 56 | + O2_DEFINE_CONFIGURABLE(cfgPtCutMax, float, 1000.0f, "Maximal pT for tracks") |
| 57 | + O2_DEFINE_CONFIGURABLE(cfgCutDCAxy, float, 0.2f, "DCAxy cut for tracks") |
| 58 | + O2_DEFINE_CONFIGURABLE(cfgDcaxy, bool, true, "choose dcaxy") |
| 59 | + |
| 60 | + ConfigurableAxis axisB{"axisB", {100, 0.0f, 20.0f}, ""}; |
| 61 | + ConfigurableAxis axisPt{"axisPt", {VARIABLE_WIDTH, 0.0f, 0.1f, 0.2f, 0.3f, 0.4f, 0.5f, 0.6f, 0.7f, 0.8f, 0.9f, 1.0f, 1.1f, 1.2f, 1.3f, 1.4f, 1.5f, 1.6f, 1.7f, 1.8f, 1.9f, 2.0f, 2.2f, 2.4f, 2.6f, 2.8f, 3.0f, 3.2f, 3.4f, 3.6f, 3.8f, 4.0f, 4.4f, 4.8f, 5.2f, 5.6f, 6.0f, 6.5f, 7.0f, 7.5f, 8.0f, 9.0f, 10.0f, 11.0f, 12.0f}, "pt axis"}; |
| 62 | + // Connect to ccdb |
| 63 | + Service<ccdb::BasicCCDBManager> ccdb; |
| 64 | + Configurable<std::string> ccdbUrl{"ccdbUrl", "http://alice-ccdb.cern.ch", "url of the ccdb repository"}; |
| 65 | + |
| 66 | + double epsilon = 1e-6; |
| 67 | + |
| 68 | + using McParts = soa::Join<aod::UDMcParticles, aod::UDMcTrackLabels>; |
| 69 | + |
| 70 | + void init(InitContext&) |
| 71 | + { |
| 72 | + ccdb->setURL(ccdbUrl.value); |
| 73 | + ccdb->setCaching(true); |
| 74 | + auto now = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count(); |
| 75 | + ccdb->setCreatedNotAfter(now); |
| 76 | + |
| 77 | + const AxisSpec axisVertex{20, -10, 10, "Vtxz (cm)"}; |
| 78 | + const AxisSpec axisEta{20, -1., 1., "#eta"}; |
| 79 | + const AxisSpec axisCounter{1, 0, +1, ""}; |
| 80 | + // QA histograms |
| 81 | + histos.add<TH1>("mcEventCounter", "Monte Carlo Truth EventCounter", HistType::kTH1F, {{5, 0, 5}}); |
| 82 | + histos.add<TH1>("RecoProcessEventCounter", "Reconstruction EventCounter", HistType::kTH1F, {{5, 0, 5}}); |
| 83 | + histos.add<TH1>("hImpactParameter", "hImpactParameter", HistType::kTH1D, {axisB}); |
| 84 | + |
| 85 | + histos.add<TH1>("hPtMCGen", "Monte Carlo Truth; pT (GeV/c);", {HistType::kTH1D, {axisPt}}); |
| 86 | + histos.add<TH3>("hEtaPtVtxzMCGen", "Monte Carlo Truth; #eta; p_{T} (GeV/c); V_{z} (cm);", {HistType::kTH3D, {axisEta, axisPt, axisVertex}}); |
| 87 | + histos.add<TH1>("hPtReco", "Monte Carlo Reco Global; pT (GeV/c);", {HistType::kTH1D, {axisPt}}); |
| 88 | + histos.add<TH3>("hEtaPtVtxzMCReco", "Monte Carlo Global; #eta; p_{T} (GeV/c); V_{z} (cm);", {HistType::kTH3D, {axisEta, axisPt, axisVertex}}); |
| 89 | + } |
| 90 | + |
| 91 | + // template <typename TCollision> |
| 92 | + // bool eventSelected(TCollision collision) |
| 93 | + // { |
| 94 | + // return true; |
| 95 | + // } |
| 96 | + |
| 97 | + template <typename TTrack> |
| 98 | + bool trackSelected(TTrack const& track) |
| 99 | + { |
| 100 | + // auto momentum = std::array<double, 3>{track.px(), track.py(), track.pz()}; |
| 101 | + auto pt = track.pt(); |
| 102 | + if (pt < cfgPtCutMin || pt > cfgPtCutMax) { |
| 103 | + return false; |
| 104 | + } |
| 105 | + double dcaLimit = 0.0105 + 0.035 / std::pow(pt, 1.1); |
| 106 | + if (cfgDcaxy && !(std::fabs(track.dcaXY()) < dcaLimit)) { |
| 107 | + return false; |
| 108 | + } |
| 109 | + return true; |
| 110 | + } |
| 111 | + |
| 112 | + void processMCTrue(aod::UDMcCollisions::iterator const& mcCollision, McParts const& mcParts, aod::BCs const& bcs) |
| 113 | + { |
| 114 | + if (bcs.size() == 0) { |
| 115 | + return; |
| 116 | + } |
| 117 | + histos.fill(HIST("mcEventCounter"), 0.5); |
| 118 | + float imp = mcCollision.impactParameter(); |
| 119 | + float vtxz = mcCollision.posZ(); |
| 120 | + |
| 121 | + if (imp >= minB && imp <= maxB) { |
| 122 | + // event within range |
| 123 | + histos.fill(HIST("hImpactParameter"), imp); |
| 124 | + |
| 125 | + for (auto const& mcParticle : mcParts) { |
| 126 | + auto momentum = std::array<double, 3>{mcParticle.px(), mcParticle.py(), mcParticle.pz()}; |
| 127 | + int pdgCode = std::abs(mcParticle.pdgCode()); |
| 128 | + |
| 129 | + double pt = RecoDecay::pt(momentum); |
| 130 | + double eta = RecoDecay::eta(momentum); |
| 131 | + |
| 132 | + if (pdgCode != PDG_t::kElectron && pdgCode != PDG_t::kMuonMinus && pdgCode != PDG_t::kPiPlus && pdgCode != PDG_t::kKPlus && pdgCode != PDG_t::kProton) |
| 133 | + continue; |
| 134 | + |
| 135 | + if (!mcParticle.isPhysicalPrimary()) |
| 136 | + continue; |
| 137 | + if (std::fabs(eta) > cfgCutEta) // main acceptance |
| 138 | + continue; |
| 139 | + |
| 140 | + histos.fill(HIST("hPtMCGen"), pt); |
| 141 | + histos.fill(HIST("hEtaPtVtxzMCGen"), eta, pt, vtxz); |
| 142 | + } |
| 143 | + } |
| 144 | + } |
| 145 | + PROCESS_SWITCH(FlowMcUpc, processMCTrue, "process pure simulation information", true); |
| 146 | + |
| 147 | + using MCRecoTracks = soa::Join<aod::UDTracks, aod::UDTracksPID, aod::UDTracksExtra, aod::UDTracksFlags, aod::UDTracksDCA, aod::UDMcTrackLabels>; |
| 148 | + using MCRecoCollisions = soa::Join<aod::UDCollisions, aod::SGCollisions, aod::UDCollisionSelExtras, aod::UDCollisionsSels, aod::UDZdcsReduced, aod::UDMcCollsLabels>; |
| 149 | + |
| 150 | + void processReco(MCRecoCollisions::iterator const& collision, MCRecoTracks const& tracks) |
| 151 | + { |
| 152 | + histos.fill(HIST("RecoProcessEventCounter"), 0.5); |
| 153 | + // if (!eventSelected(collision)) |
| 154 | + // return; |
| 155 | + histos.fill(HIST("RecoProcessEventCounter"), 1.5); |
| 156 | + if (!collision.has_udMcCollision()) |
| 157 | + return; |
| 158 | + histos.fill(HIST("RecoProcessEventCounter"), 2.5); |
| 159 | + if (tracks.size() < 1) |
| 160 | + return; |
| 161 | + histos.fill(HIST("RecoProcessEventCounter"), 3.5); |
| 162 | + |
| 163 | + float vtxz = collision.posZ(); |
| 164 | + |
| 165 | + for (const auto& track : tracks) { |
| 166 | + // focus on bulk: e, mu, pi, k, p |
| 167 | + auto momentum = std::array<double, 3>{track.px(), track.py(), track.pz()}; |
| 168 | + double pt = RecoDecay::pt(momentum); |
| 169 | + double eta = RecoDecay::eta(momentum); |
| 170 | + // double phi = RecoDecay::phi(momentum); |
| 171 | + if (!trackSelected(track) || (!track.has_udMcParticle())) |
| 172 | + continue; |
| 173 | + auto mcParticle = track.udMcParticle(); |
| 174 | + int pdgCode = std::abs(mcParticle.pdgCode()); |
| 175 | + |
| 176 | + // double pt = recoMC.Pt(); |
| 177 | + // double eta = recoMC.Eta(); |
| 178 | + if (pdgCode != PDG_t::kElectron && pdgCode != PDG_t::kMuonMinus && pdgCode != PDG_t::kPiPlus && pdgCode != PDG_t::kKPlus && pdgCode != PDG_t::kProton) |
| 179 | + continue; |
| 180 | + if (std::fabs(eta) > cfgCutEta) // main acceptance |
| 181 | + continue; |
| 182 | + if (!mcParticle.isPhysicalPrimary()) |
| 183 | + continue; |
| 184 | + |
| 185 | + histos.fill(HIST("hPtReco"), pt); |
| 186 | + histos.fill(HIST("hEtaPtVtxzMCReco"), eta, pt, vtxz); |
| 187 | + } |
| 188 | + } |
| 189 | + PROCESS_SWITCH(FlowMcUpc, processReco, "process reconstructed information", true); |
| 190 | +}; |
| 191 | + |
| 192 | +WorkflowSpec defineDataProcessing(ConfigContext const& cfgc) |
| 193 | +{ |
| 194 | + return WorkflowSpec{ |
| 195 | + adaptAnalysisTask<FlowMcUpc>(cfgc)}; |
| 196 | +} |
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