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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 | +/// \author Veronika Barbasova (veronika.barbasova@cern.ch) |
| 13 | +/// \since October 12, 2023 |
| 14 | + |
| 15 | +#include "Framework/runDataProcessing.h" |
| 16 | +#include "Framework/AnalysisTask.h" |
| 17 | + |
| 18 | +#include "Common/DataModel/TrackSelectionTables.h" |
| 19 | +#include "Common/DataModel/Multiplicity.h" |
| 20 | +#include "Common/DataModel/EventSelection.h" |
| 21 | +#include "Common/DataModel/PIDResponse.h" |
| 22 | + |
| 23 | +#include <TLorentzVector.h> |
| 24 | +#include "ReconstructionDataFormats/PID.h" |
| 25 | +#include "Framework/ASoAHelpers.h" |
| 26 | + |
| 27 | +using namespace o2; |
| 28 | +using namespace o2::framework; |
| 29 | +using namespace o2::framework::expressions; |
| 30 | + |
| 31 | +struct rsnanalysisTHnSparse { |
| 32 | + |
| 33 | + SliceCache cache; |
| 34 | + |
| 35 | + Configurable<bool> test{"test", false, "Running in test mode."}; |
| 36 | + Configurable<int> refresh{"print-refresh", 0, "Freqency of print event information."}; |
| 37 | + Configurable<int> refresh_index{"print-refresh-index", 1, "Freqency of print event information index."}; |
| 38 | + Configurable<float> tpcnSigma1{"tpcnSigma1", 3.0f, "TPC NSigma cut of the first particle."}; |
| 39 | + Configurable<float> tpcnSigma2{"tpcnSigma2", 3.0f, "TPC NSigma cut of the second particle."}; |
| 40 | + Configurable<int> dauther1{"dauther1", 3, "Particle type of the first dauther according to ReconstructionDataFormats/PID.h (Default = Kaon)"}; |
| 41 | + Configurable<int> dauther2{"dauther", 3, "Particle type of the second dauther according to ReconstructionDataFormats/PID.h (Default = Kaon)"}; |
| 42 | + Configurable<float> vertexfilter{"vertex-filter", 10.0f, "Z vertex range."}; |
| 43 | + |
| 44 | + ConfigurableAxis invaxis{"invAxis", {200, 0.97, 1.1}, "Invariant mass axis binning."}; |
| 45 | + ConfigurableAxis ptaxis{"ptAxis", {20, 0., 20.}, "Pt axis binning."}; |
| 46 | + ConfigurableAxis maxis{"mAxis", {200, 0., 2000.}, "Multiplicity axis binning."}; |
| 47 | + ConfigurableAxis nsigmaaxis{"nsigma-axis", {300, -15., 15.}, "NSigma axis binning."}; |
| 48 | + |
| 49 | + HistogramRegistry registry{"registry", |
| 50 | + {{"hNsigmaPos", "hNsigmaPos", {HistType::kTH1F, {nsigmaaxis}}}, |
| 51 | + {"hNsigmaNeg", "hNsigmaNeg", {HistType::kTH1F, {nsigmaaxis}}}}}; |
| 52 | + |
| 53 | + // defined in DataFormats/Reconstruction/include/ReconstructionDataFormats/PID.h |
| 54 | + float mass1 = o2::track::PID::getMass(dauther1); |
| 55 | + float mass2 = o2::track::PID::getMass(dauther2); |
| 56 | + |
| 57 | + float multiplicity; |
| 58 | + |
| 59 | + Filter eventFilter = (o2::aod::evsel::sel8 == true); |
| 60 | + Filter vtxFilter = (nabs(o2::aod::collision::posZ) < vertexfilter); |
| 61 | + |
| 62 | + using EventCandidates = soa::Filtered<soa::Join<aod::Collisions, aod::EvSels, aod::Mults>>; |
| 63 | + using EventCandidate = EventCandidates::iterator; |
| 64 | + using TrackCandidates = soa::Join<aod::Tracks, aod::TracksExtra, aod::TrackSelection, aod::pidTPCFullKa>; |
| 65 | + |
| 66 | + Partition<TrackCandidates> positive = (aod::track::signed1Pt > 0.0f) && (nabs(o2::aod::pidtpc::tpcNSigmaKa) < tpcnSigma1); |
| 67 | + Partition<TrackCandidates> negative = (aod::track::signed1Pt < 0.0f) && (nabs(o2::aod::pidtpc::tpcNSigmaKa) < tpcnSigma2); |
| 68 | + |
| 69 | + TLorentzVector d1, d2, mother; |
| 70 | + |
| 71 | + void init(o2::framework::InitContext&) |
| 72 | + { |
| 73 | + if (test) |
| 74 | + LOGF(info, "Running test"); |
| 75 | + |
| 76 | + AxisSpec invAxis = {invaxis, "Inv. mass (GeV/c^{2})", "im"}; |
| 77 | + AxisSpec ptAxis = {ptaxis, "p_{T} (GeV/c)", "pt"}; |
| 78 | + AxisSpec mAxis = {maxis, "N", "m"}; |
| 79 | + HistogramConfigSpec Hist({HistType::kTHnSparseF, {invAxis, ptAxis, mAxis}}); |
| 80 | + registry.add("unlike", "Unlike", Hist); |
| 81 | + registry.add("likep", "Likep", Hist); |
| 82 | + registry.add("liken", "Liken", Hist); |
| 83 | + } |
| 84 | + |
| 85 | + template <typename T> |
| 86 | + bool selectedTrack(const T& track) |
| 87 | + { |
| 88 | + if (!track.isPrimaryTrack()) |
| 89 | + return false; |
| 90 | + return true; |
| 91 | + } |
| 92 | + |
| 93 | + template <typename T> |
| 94 | + bool selectedPair(TLorentzVector& mother, const T& track1, const T& track2) |
| 95 | + { |
| 96 | + d1.SetXYZM(track1.px(), track1.py(), track1.pz(), mass1); |
| 97 | + d2.SetXYZM(track2.px(), track2.py(), track2.pz(), mass2); |
| 98 | + mother = d1 + d2; |
| 99 | + |
| 100 | + return true; |
| 101 | + } |
| 102 | + |
| 103 | + void process(EventCandidate const& collision, TrackCandidates const& tracks) |
| 104 | + { |
| 105 | + if (test && collision.globalIndex() != 1) |
| 106 | + return; |
| 107 | + |
| 108 | + auto posDauthers = positive->sliceByCached(aod::track::collisionId, collision.globalIndex(), cache); |
| 109 | + auto negDauthers = negative->sliceByCached(aod::track::collisionId, collision.globalIndex(), cache); |
| 110 | + |
| 111 | + if (collision.globalIndex() == 0) { |
| 112 | + if (test) { |
| 113 | + LOGF(info, "BAD pos=%lld neg=%lld, Z vertex position: %f [cm], %d, mult:%f.0", posDauthers.size(), negDauthers.size(), collision.posZ(), |
| 114 | + collision.globalIndex(), multiplicity); |
| 115 | + } |
| 116 | + return; |
| 117 | + } |
| 118 | + |
| 119 | + multiplicity = collision.multFT0A() + collision.multFT0C(); |
| 120 | + |
| 121 | + if (refresh > 0 && collision.globalIndex() % refresh == refresh_index) |
| 122 | + LOGF(info, "pos=%lld neg=%lld, Z vertex position: %f [cm], %d, mult:%f.0", posDauthers.size(), negDauthers.size(), collision.posZ(), |
| 123 | + collision.globalIndex(), multiplicity); |
| 124 | + |
| 125 | + for (const auto& trk : posDauthers) { |
| 126 | + registry.fill(HIST("hNsigmaPos"), trk.tpcNSigmaKa()); |
| 127 | + } |
| 128 | + |
| 129 | + for (const auto& trk : negDauthers) { |
| 130 | + registry.fill(HIST("hNsigmaNeg"), trk.tpcNSigmaKa()); |
| 131 | + } |
| 132 | + |
| 133 | + for (auto& [track1, track2] : combinations(o2::soa::CombinationsUpperIndexPolicy(posDauthers, negDauthers))) { |
| 134 | + |
| 135 | + if (!selectedTrack(track1)) |
| 136 | + continue; |
| 137 | + if (!selectedTrack(track2)) |
| 138 | + continue; |
| 139 | + |
| 140 | + if (!selectedPair(mother, track1, track2)) |
| 141 | + continue; |
| 142 | + registry.fill(HIST("unlike"), mother.Mag(), mother.Pt(), multiplicity); |
| 143 | + } |
| 144 | + |
| 145 | + for (auto& [track1, track2] : combinations(o2::soa::CombinationsStrictlyUpperIndexPolicy(posDauthers, posDauthers))) { |
| 146 | + |
| 147 | + if (!selectedTrack(track1)) |
| 148 | + continue; |
| 149 | + if (!selectedTrack(track2)) |
| 150 | + continue; |
| 151 | + |
| 152 | + if (!selectedPair(mother, track1, track2)) |
| 153 | + continue; |
| 154 | + registry.fill(HIST("likep"), mother.Mag(), mother.Pt(), multiplicity); |
| 155 | + } |
| 156 | + |
| 157 | + for (auto& [track1, track2] : combinations(o2::soa::CombinationsStrictlyUpperIndexPolicy(negDauthers, negDauthers))) { |
| 158 | + |
| 159 | + if (!selectedTrack(track1)) |
| 160 | + continue; |
| 161 | + if (!selectedTrack(track2)) |
| 162 | + continue; |
| 163 | + |
| 164 | + if (!selectedPair(mother, track1, track2)) |
| 165 | + continue; |
| 166 | + registry.fill(HIST("liken"), mother.Mag(), mother.Pt(), multiplicity); |
| 167 | + } |
| 168 | + } |
| 169 | +}; |
| 170 | + |
| 171 | +WorkflowSpec defineDataProcessing(ConfigContext const& cfgc) |
| 172 | +{ |
| 173 | + return WorkflowSpec{ |
| 174 | + adaptAnalysisTask<rsnanalysisTHnSparse>(cfgc)}; |
| 175 | +} |
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