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[ALICE3] Adding unweighted mass plots to ALICE 3 decay finder #12166

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Merged
njacazio merged 3 commits into from
Jul 22, 2025
Merged

[ALICE3] Adding unweighted mass plots to ALICE 3 decay finder #12166

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5f8cdf3
Adding unweighted mass plots to ALICE 3 decay finder
Jul 21, 2025
8eda4cc
Please consider the following formatting changes
alibuild Jul 21, 2025
094aef2
Merge pull request #7 from alibuild/alibot-cleanup-12166
fcolamar Jul 21, 2025
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38 changes: 27 additions & 11 deletions ALICE3/TableProducer/alice3-correlatorDDbar.cxx
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
// Copyright 2019-2020 CERN and copyright holders of ALICE O2.

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[name/workflow-file] 

Name of a workflow file must match the name of the main struct in it (without the PWG prefix). (Class implementation files should be in "Core" directories.)

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[name/file-cpp] 

Use lowerCamelCase or UpperCamelCase for names of C++ files. See the O2 naming conventions for details.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
Expand All @@ -14,23 +14,20 @@
///
/// \author Fabio Colamaria <fabio.colamaria@ba.infn.it>, INFN Bari

#include <vector>
#include "PWGHF/Core/HfHelper.h"
#include "PWGHF/Core/SelectorCuts.h"
#include "PWGHF/HFC/DataModel/CorrelationTables.h"

#include "ALICE3/DataModel/A3DecayFinderTables.h"
#include "Common/Core/TrackSelection.h"
#include "Common/DataModel/TrackSelectionTables.h"

#include "CommonConstants/PhysicsConstants.h"
#include "Framework/AnalysisTask.h"
#include "Framework/HistogramRegistry.h"
#include "Framework/runDataProcessing.h"

#include "Common/Core/TrackSelection.h"
#include "Common/DataModel/TrackSelectionTables.h"

#include "ALICE3/DataModel/A3DecayFinderTables.h"

#include "PWGHF/Core/HfHelper.h"
#include "PWGHF/Core/SelectorCuts.h"
#include "PWGHF/HFC/DataModel/CorrelationTables.h"
// #include "PWGHF/DataModel/CandidateReconstructionTables.h"
// #include "PWGHF/DataModel/CandidateSelectionTables.h"
#include <vector>

using namespace o2;
using namespace o2::analysis;
Expand All @@ -55,7 +52,7 @@

const int npTBinsMassAndEfficiency = o2::analysis::hf_cuts_d0_to_pi_k::NBinsPt;
const double efficiencyDmesonDefault[npTBinsMassAndEfficiency] = {};
auto efficiencyDmeson_v = std::vector<double>{efficiencyDmesonDefault, efficiencyDmesonDefault + npTBinsMassAndEfficiency};

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// histogram binning definition
const int massAxisBins = 120;
Expand All @@ -71,7 +68,7 @@
const double ptDAxisMin = 0.;
const double ptDAxisMax = 36.;

struct alice3correlatorddbar {

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SliceCache cache;
Preslice<aod::Alice3D0Meson> perCol = aod::a3D0meson::collisionId;
Produces<aod::DDbarPair> entryD0D0barPair;
Expand Down Expand Up @@ -121,6 +118,15 @@
registry.add("hMassD0barMCRecSig", "D0bar signal candidates - MC reco;inv. mass D0bar only (#pi K) (GeV/#it{c}^{2});entries", {HistType::kTH2F, {{massAxisBins, massAxisMin, massAxisMax}, {vbins, "#it{p}_{T} (GeV/#it{c})"}}});
registry.add("hMassD0barMCRecRefl", "D0bar reflection candidates - MC reco;inv. mass D0bar only (#pi K) (GeV/#it{c}^{2});entries", {HistType::kTH2F, {{massAxisBins, massAxisMin, massAxisMax}, {vbins, "#it{p}_{T} (GeV/#it{c})"}}});
registry.add("hMassD0barMCRecBkg", "D0bar background candidates - MC reco;inv. mass D0bar only (#pi K) (GeV/#it{c}^{2});entries", {HistType::kTH2F, {{massAxisBins, massAxisMin, massAxisMax}, {vbins, "#it{p}_{T} (GeV/#it{c})"}}});
registry.add("hMass_NoEff", "D0,D0bar candidates (wo efficiency);inv. mass (#pi K) (GeV/#it{c}^{2});entries", {HistType::kTH2F, {{massAxisBins, massAxisMin, massAxisMax}, {vbins, "#it{p}_{T} (GeV/#it{c})"}}});
registry.add("hMassD0_NoEff", "D0,D0bar candidates (wo efficiency);inv. mass D0 only (#pi K) (GeV/#it{c}^{2});entries", {HistType::kTH2F, {{massAxisBins, massAxisMin, massAxisMax}, {vbins, "#it{p}_{T} (GeV/#it{c})"}}});
registry.add("hMassD0bar_NoEff", "D0,D0bar candidates (wo efficiency);inv. mass D0bar only (#pi K) (GeV/#it{c}^{2});entries", {HistType::kTH2F, {{massAxisBins, massAxisMin, massAxisMax}, {vbins, "#it{p}_{T} (GeV/#it{c})"}}});
registry.add("hMassD0MCRecSig_NoEff", "D0 signal candidates - MC reco (wo efficiency);inv. mass (#pi K) (GeV/#it{c}^{2});entries", {HistType::kTH2F, {{massAxisBins, massAxisMin, massAxisMax}, {vbins, "#it{p}_{T} (GeV/#it{c})"}}});
registry.add("hMassD0MCRecRefl_NoEff", "D0 reflection candidates - MC reco (wo efficiency);inv. mass (#pi K) (GeV/#it{c}^{2});entries", {HistType::kTH2F, {{massAxisBins, massAxisMin, massAxisMax}, {vbins, "#it{p}_{T} (GeV/#it{c})"}}});
registry.add("hMassD0MCRecBkg_NoEff", "D0 background candidates - MC reco (wo efficiency);inv. mass (#pi K) (GeV/#it{c}^{2});entries", {HistType::kTH2F, {{massAxisBins, massAxisMin, massAxisMax}, {vbins, "#it{p}_{T} (GeV/#it{c})"}}});
registry.add("hMassD0barMCRecSig_NoEff", "D0bar signal candidates - MC reco (wo efficiency);inv. mass D0bar only (#pi K) (GeV/#it{c}^{2});entries", {HistType::kTH2F, {{massAxisBins, massAxisMin, massAxisMax}, {vbins, "#it{p}_{T} (GeV/#it{c})"}}});
registry.add("hMassD0barMCRecRefl_NoEff", "D0bar reflection candidates - MC reco (wo efficiency);inv. mass D0bar only (#pi K) (GeV/#it{c}^{2});entries", {HistType::kTH2F, {{massAxisBins, massAxisMin, massAxisMax}, {vbins, "#it{p}_{T} (GeV/#it{c})"}}});
registry.add("hMassD0barMCRecBkg_NoEff", "D0bar background candidates - MC reco (wo efficiency);inv. mass D0bar only (#pi K) (GeV/#it{c}^{2});entries", {HistType::kTH2F, {{massAxisBins, massAxisMin, massAxisMax}, {vbins, "#it{p}_{T} (GeV/#it{c})"}}});
}

/// D0-D0bar correlation pair builder - for real data and data-like analysis (i.e. reco-level w/o matching request via MC truth)
Expand All @@ -139,10 +145,14 @@
if (candidate1.isSelD0() >= selectionFlagD0) {
registry.fill(HIST("hMass"), candidate1.m(), candidate1.pt(), efficiencyWeight);
registry.fill(HIST("hMassD0"), candidate1.m(), candidate1.pt(), efficiencyWeight);
registry.fill(HIST("hMass_NoEff"), candidate1.m(), candidate1.pt());
registry.fill(HIST("hMassD0_NoEff"), candidate1.m(), candidate1.pt());
}
if (candidate1.isSelD0bar() >= selectionFlagD0bar) {
registry.fill(HIST("hMass"), candidate1.m(), candidate1.pt(), efficiencyWeight);
registry.fill(HIST("hMassD0bar"), candidate1.m(), candidate1.pt(), efficiencyWeight);
registry.fill(HIST("hMass_NoEff"), candidate1.m(), candidate1.pt());
registry.fill(HIST("hMassD0bar_NoEff"), candidate1.m(), candidate1.pt());
}
registry.fill(HIST("hPtCand"), candidate1.pt());
registry.fill(HIST("hPtProng0"), candidate1.ptProng0());
Expand All @@ -166,7 +176,7 @@
if (candidate1.mRowIndex == candidate2.mRowIndex) { // this by definition should never happen, since each candidate is either D0 or D0bar
continue;
}
if ((candidate1.pt() - candidate2.pt()) < 1e-5 && (candidate1.eta() - candidate2.eta()) < 1e-5 && (candidate1.phi() - candidate2.phi()) < 1e-5) { // revised, temporary condition to avoid self-correlations (the best would be check the daughterIDs, but we don't store them at the moment)

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continue;
}
entryD0D0barPair(getDeltaPhi(candidate2.phi(), candidate1.phi()),
Expand Down Expand Up @@ -229,19 +239,25 @@
if (candidate1.isSelD0() >= selectionFlagD0) { // only reco as D0
if (candidate1.mcTruthInfo() == 1) { // also matched as D0
registry.fill(HIST("hMassD0MCRecSig"), candidate1.m(), candidate1.pt(), efficiencyWeight); // here m is univoque, since a given candidate passes the selection with only a single mass option
registry.fill(HIST("hMassD0MCRecSig_NoEff"), candidate1.m(), candidate1.pt());
} else if (candidate1.mcTruthInfo() == 2) {

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registry.fill(HIST("hMassD0MCRecRefl"), candidate1.m(), candidate1.pt(), efficiencyWeight);
registry.fill(HIST("hMassD0MCRecRefl_NoEff"), candidate1.m(), candidate1.pt());
} else {
registry.fill(HIST("hMassD0MCRecBkg"), candidate1.m(), candidate1.pt(), efficiencyWeight);
registry.fill(HIST("hMassD0MCRecBkg_NoEff"), candidate1.m(), candidate1.pt());
}
}
if (candidate1.isSelD0bar() >= selectionFlagD0bar) { // only reco as D0bar
if (candidate1.mcTruthInfo() == 2) { // also matched as D0bar

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registry.fill(HIST("hMassD0barMCRecSig"), candidate1.m(), candidate1.pt(), efficiencyWeight); // here m is univoque, since a given candidate passes the selection with only a single mass option
registry.fill(HIST("hMassD0barMCRecSig_NoEff"), candidate1.m(), candidate1.pt());
} else if (candidate1.mcTruthInfo() == 1) {
registry.fill(HIST("hMassD0barMCRecRefl"), candidate1.m(), candidate1.pt(), efficiencyWeight);
registry.fill(HIST("hMassD0barMCRecRefl_NoEff"), candidate1.m(), candidate1.pt());
} else {
registry.fill(HIST("hMassD0barMCRecBkg"), candidate1.m(), candidate1.pt(), efficiencyWeight);
registry.fill(HIST("hMassD0barMCRecBkg_NoEff"), candidate1.m(), candidate1.pt());
}
}

Expand All @@ -252,20 +268,20 @@
}

flagD0Signal = candidate1.mcTruthInfo() == 1; // flagD0Signal 'true' if candidate1 matched to D0 (particle)
flagD0Reflection = candidate1.mcTruthInfo() == 2; // flagD0Reflection 'true' if candidate1, selected as D0 (particle), is matched to D0bar (antiparticle)

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for (const auto& candidate2 : selectedCandidatesGroupedMC) {
if (candidate2.isSelD0bar() < selectionFlagD0bar) { // discard candidates not selected as D0bar in inner loop
continue;
}
flagD0barSignal = candidate2.mcTruthInfo() == 2; // flagD0barSignal 'true' if candidate2 matched to D0bar (antiparticle)

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flagD0barReflection = candidate2.mcTruthInfo() == 1; // flagD0barReflection 'true' if candidate2, selected as D0bar (antiparticle), is matched to D0 (particle)

// Excluding trigger self-correlations (possible in case of both mass hypotheses of the same real particle, reconstructed as candidate1 for D0 and candidate2 for D0bar)
if (candidate1.mRowIndex == candidate2.mRowIndex) { // this by definition should never happen, since each candidate is either D0 or D0bar
continue;
}
if ((candidate1.pt() - candidate2.pt()) < 1e-5 && (candidate1.eta() - candidate2.eta()) < 1e-5 && (candidate1.phi() - candidate2.phi()) < 1e-5) { // revised, temporary condition to avoid self-correlations (the best would be check the daughterIDs, but we don't store them at the moment)

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continue;
}
// choice of options (D0/D0bar signal/bkg)
Expand Down
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