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[PWGUD] added derived data for resolution studies into upcRhoAnalysis.cxx #15035

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Merged
amatyja merged 6 commits into from
Feb 18, 2026
+63 −9
Merged

[PWGUD] added derived data for resolution studies into upcRhoAnalysis.cxx #15035

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d1f9956
add vertex position resolution histos
jjuracka Feb 18, 2026
aae4761
initialise derived data for resolution task
jjuracka Feb 18, 2026
63a3e88
common configurable axis for resolution histos
jjuracka Feb 18, 2026
b0412f3
fill resolution table
jjuracka Feb 18, 2026
dc8669d
Please consider the following formatting changes
alibuild Feb 18, 2026
3a22d78
Merge pull request #13 from alibuild/alibot-cleanup-15035
jjuracka Feb 18, 2026
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72 changes: 63 additions & 9 deletions PWGUD/Tasks/upcRhoAnalysis.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -128,11 +128,45 @@ DECLARE_SOA_TABLE(McTree, "AOD", "MCTREE",
mc_tree::LeadingTrackPt, mc_tree::SubleadingTrackPt,
mc_tree::LeadingTrackEta, mc_tree::SubleadingTrackEta,
mc_tree::LeadingTrackPhi, mc_tree::SubleadingTrackPhi);

namespace resolution_tree
{
// vertex info
DECLARE_SOA_COLUMN(GenPosX, genPosX, float);
DECLARE_SOA_COLUMN(GenPosY, genPosY, float);
DECLARE_SOA_COLUMN(GenPosZ, genPosZ, float);
DECLARE_SOA_COLUMN(RecoPosX, recoPosX, float);
DECLARE_SOA_COLUMN(RecoPosY, recoPosY, float);
DECLARE_SOA_COLUMN(RecoPosZ, recoPosZ, float);
// track info
DECLARE_SOA_COLUMN(LeadingSign, leadingSign, int);
DECLARE_SOA_COLUMN(LeadingGenPt, leadingGenPt, float);
DECLARE_SOA_COLUMN(LeadingGenEta, leadingGenEta, float);
DECLARE_SOA_COLUMN(LeadingGenPhi, leadingGenPhi, float);
DECLARE_SOA_COLUMN(LeadingRecoPt, leadingRecoPt, float);
DECLARE_SOA_COLUMN(LeadingRecoEta, leadingRecoEta, float);
DECLARE_SOA_COLUMN(LeadingRecoPhi, leadingRecoPhi, float);
DECLARE_SOA_COLUMN(SubleadingSign, subleadingSign, int);
DECLARE_SOA_COLUMN(SubleadingGenPt, subleadingGenPt, float);
DECLARE_SOA_COLUMN(SubleadingGenEta, subleadingGenEta, float);
DECLARE_SOA_COLUMN(SubleadingGenPhi, subleadingGenPhi, float);
DECLARE_SOA_COLUMN(SubleadingRecoPt, subleadingRecoPt, float);
DECLARE_SOA_COLUMN(SubleadingRecoEta, subleadingRecoEta, float);
DECLARE_SOA_COLUMN(SubleadingRecoPhi, subleadingRecoPhi, float);
} // namespace resolution_tree
DECLARE_SOA_TABLE(ResolutionTree, "AOD", "RESOLUTIONTREE",
resolution_tree::GenPosX, resolution_tree::GenPosY, resolution_tree::GenPosZ,
resolution_tree::RecoPosX, resolution_tree::RecoPosY, resolution_tree::RecoPosZ,
resolution_tree::LeadingSign, resolution_tree::LeadingGenPt, resolution_tree::LeadingGenEta, resolution_tree::LeadingGenPhi,
resolution_tree::LeadingRecoPt, resolution_tree::LeadingRecoEta, resolution_tree::LeadingRecoPhi,
resolution_tree::SubleadingSign, resolution_tree::SubleadingGenPt, resolution_tree::SubleadingGenEta, resolution_tree::SubleadingGenPhi,
resolution_tree::SubleadingRecoPt, resolution_tree::SubleadingRecoEta, resolution_tree::SubleadingRecoPhi);
} // namespace o2::aod

struct UpcRhoAnalysis {
Produces<o2::aod::RecoTree> recoTree;
Produces<o2::aod::McTree> mcTree;
Produces<o2::aod::ResolutionTree> resolutionTree;

SGSelector sgSelector;

Expand Down Expand Up @@ -193,6 +227,7 @@ struct UpcRhoAnalysis {
ConfigurableAxis znCommonEnergyAxis{"znCommonEnergyAxis", {250, -5.0, 20.0}, "ZN common energy (TeV)"};
ConfigurableAxis znTimeAxis{"znTimeAxis", {200, -10.0, 10.0}, "ZN time (ns)"};
ConfigurableAxis nSigmaAxis{"nSigmaAxis", {600, -30.0, 30.0}, "TPC #it{n#sigma}"};
ConfigurableAxis resolutionAxis{"resolutionAxis", {2000, -1.0, 1.0}, "resolution"};

HistogramRegistry rQC{"rQC", {}, OutputObjHandlingPolicy::AnalysisObject};
HistogramRegistry rTracks{"rTracks", {}, OutputObjHandlingPolicy::AnalysisObject};
Expand Down Expand Up @@ -360,19 +395,22 @@ struct UpcRhoAnalysis {
if (context.mOptions.get<bool>("processResolution")) {
// collision matching
rResolution.add("MC/resolution/collisions/hMatch", ";matched;counts", kTH1D, {{2, -0.5, 1.5}});
rResolution.add("MC/resolution/collisions/hPosX", ";vertex #it{x}_{reco} - vertex #it{x}_{true} (cm);counts", kTH1D, {resolutionAxis});
rResolution.add("MC/resolution/collisions/hPosY", ";vertex #it{y}_{reco} - vertex #it{y}_{true} (cm);counts", kTH1D, {resolutionAxis});
rResolution.add("MC/resolution/collisions/hPosZ", ";vertex #it{z}_{reco} - vertex #it{z}_{true} (cm);counts", kTH1D, {resolutionAxis});
// track matching and resolutions
rResolution.add("MC/resolution/tracks/hMatch", ";matched;counts", kTH1D, {{2, -0.5, 1.5}});
rResolution.add("MC/resolution/tracks/hPt", ";#it{p}_{T, reco} - #it{p}_{T, true} (GeV/#it{c});counts", kTH1D, {{200, -1.0, 1.0}});
rResolution.add("MC/resolution/tracks/hEta", ";#it{#eta}_{reco} - #it{#eta}_{true};counts", kTH1D, {{200, -0.2, 0.2}});
rResolution.add("MC/resolution/tracks/hPhi", ";#it{#phi}_{reco} - #it{#phi}_{true} (rad);counts", kTH1D, {{200, -0.2, 0.2}});
rResolution.add("MC/resolution/tracks/hPt", ";#it{p}_{T, reco} - #it{p}_{T, true} (GeV/#it{c});counts", kTH1D, {resolutionAxis});
rResolution.add("MC/resolution/tracks/hEta", ";#it{#eta}_{reco} - #it{#eta}_{true};counts", kTH1D, {resolutionAxis});
rResolution.add("MC/resolution/tracks/hPhi", ";#it{#phi}_{reco} - #it{#phi}_{true} (rad);counts", kTH1D, {resolutionAxis});
// dipion system resolutions (1D and 2D)
rResolution.add("MC/resolution/system/1D/hM", ";#it{m}_{reco} - #it{m}_{true} (GeV/#it{c}^{2});counts", kTH1D, {{200, -1.0, 1.0}});
rResolution.add("MC/resolution/system/1D/hM", ";#it{m}_{reco} - #it{m}_{true} (GeV/#it{c}^{2});counts", kTH1D, {resolutionAxis});
rResolution.add("MC/resolution/system/2D/hMVsM", ";#it{m}_{true} (GeV/#it{c}^{2});#it{m}_{reco} (GeV/#it{c}^{2});counts", kTH2D, {mAxis, mAxis});
rResolution.add("MC/resolution/system/1D/hPt", ";#it{p}_{T, reco} - #it{p}_{T, true} (GeV/#it{c});counts", kTH1D, {{200, -1.0, 1.0}});
rResolution.add("MC/resolution/system/1D/hPt", ";#it{p}_{T, reco} - #it{p}_{T, true} (GeV/#it{c});counts", kTH1D, {resolutionAxis});
rResolution.add("MC/resolution/system/2D/hPtVsPt", ";#it{p}_{T, true} (GeV/#it{c});#it{p}_{T, reco} (GeV/#it{c});counts", kTH2D, {ptAxis, ptAxis});
rResolution.add("MC/resolution/system/1D/hY", ";#it{y}_{reco} - #it{y}_{true};counts", kTH1D, {{200, -0.2, 0.2}});
rResolution.add("MC/resolution/system/1D/hY", ";#it{y}_{reco} - #it{y}_{true};counts", kTH1D, {resolutionAxis});
rResolution.add("MC/resolution/system/2D/hYVsY", ";#it{y}_{true};#it{y}_{reco};counts", kTH2D, {yAxis, yAxis});
rResolution.add("MC/resolution/system/1D/hDeltaPhi", ";#Delta#it{#phi}_{reco} - #Delta#it{#phi}_{true} (rad);counts", kTH1D, {{2000, -1.0, 1.0}});
rResolution.add("MC/resolution/system/1D/hDeltaPhi", ";#Delta#it{#phi}_{reco} - #Delta#it{#phi}_{true} (rad);counts", kTH1D, {resolutionAxis});
rResolution.add("MC/resolution/system/2D/hDeltaPhiVsDeltaPhi", ";#Delta#it{#phi}_{true} (rad);#Delta#it{#phi}_{reco} (rad);counts", kTH2D, {deltaPhiAxis, deltaPhiAxis});
}
}
Expand Down Expand Up @@ -1090,6 +1128,10 @@ struct UpcRhoAnalysis {
if (!collision.has_udMcCollision())
return;
rResolution.fill(HIST("MC/resolution/collisions/hMatch"), 1);
auto mcCollision = collision.udMcCollision();
rResolution.fill(HIST("MC/resolution/collisions/hPosX"), collision.posX() - mcCollision.posX());
rResolution.fill(HIST("MC/resolution/collisions/hPosY"), collision.posY() - mcCollision.posY());
rResolution.fill(HIST("MC/resolution/collisions/hPosZ"), collision.posZ() - mcCollision.posZ());

std::vector<decltype(tracks.begin().udMcParticle())> trueTracks;
std::vector<decltype(tracks.begin())> recoTracks;
Expand All @@ -1101,11 +1143,11 @@ struct UpcRhoAnalysis {
continue;
rResolution.fill(HIST("MC/resolution/tracks/hMatch"), 1);
auto mcParticle = track.udMcParticle();
if (std::abs(mcParticle.pdgCode()) != kPiPlus && !mcParticle.isPhysicalPrimary())
continue;
rResolution.fill(HIST("MC/resolution/tracks/hPt"), pt(track.px(), track.py()) - pt(mcParticle.px(), mcParticle.py()));
rResolution.fill(HIST("MC/resolution/tracks/hEta"), eta(track.px(), track.py(), track.pz()) - eta(mcParticle.px(), mcParticle.py(), mcParticle.pz()));
rResolution.fill(HIST("MC/resolution/tracks/hPhi"), phi(track.px(), track.py()) - phi(mcParticle.px(), mcParticle.py()));
if (std::abs(mcParticle.pdgCode()) != kPiPlus && !mcParticle.isPhysicalPrimary())
continue;
truePionLVs.push_back(ROOT::Math::PxPyPzMVector(mcParticle.px(), mcParticle.py(), mcParticle.pz(), o2::constants::physics::MassPionCharged));
trueTracks.push_back(mcParticle);
recoPionLVs.push_back(ROOT::Math::PxPyPzMVector(track.px(), track.py(), track.pz(), o2::constants::physics::MassPionCharged));
Expand All @@ -1128,6 +1170,18 @@ struct UpcRhoAnalysis {
rResolution.fill(HIST("MC/resolution/system/2D/hYVsY"), trueSystem.Rapidity(), recoSystem.Rapidity());
rResolution.fill(HIST("MC/resolution/system/1D/hDeltaPhi"), recoDeltaPhi - trueDeltaPhi);
rResolution.fill(HIST("MC/resolution/system/2D/hDeltaPhiVsDeltaPhi"), trueDeltaPhi, recoDeltaPhi);

auto leadingTruePion = momentum(trueTracks[0].px(), trueTracks[0].py(), trueTracks[0].pz()) > momentum(trueTracks[1].px(), trueTracks[1].py(), trueTracks[1].pz()) ? trueTracks[0] : trueTracks[1];
auto subleadingTruePion = (leadingTruePion == trueTracks[0]) ? trueTracks[1] : trueTracks[0];
auto leadingRecoPion = momentum(recoTracks[0].px(), recoTracks[0].py(), recoTracks[0].pz()) > momentum(recoTracks[1].px(), recoTracks[1].py(), recoTracks[1].pz()) ? recoTracks[0] : recoTracks[1];
auto subleadingRecoPion = (leadingRecoPion == recoTracks[0]) ? recoTracks[1] : recoTracks[0];

resolutionTree(mcCollision.posX(), mcCollision.posY(), mcCollision.posZ(),
collision.posX(), collision.posY(), collision.posZ(),
leadingTruePion.pdgCode() / std::abs(leadingTruePion.pdgCode()), pt(leadingTruePion.px(), leadingTruePion.py()), eta(leadingTruePion.px(), leadingTruePion.py(), leadingTruePion.pz()), phi(leadingTruePion.px(), leadingTruePion.py()),
pt(leadingRecoPion.px(), leadingRecoPion.py()), eta(leadingRecoPion.px(), leadingRecoPion.py(), leadingRecoPion.pz()), phi(leadingRecoPion.px(), leadingRecoPion.py()),
subleadingTruePion.pdgCode() / std::abs(subleadingTruePion.pdgCode()), pt(subleadingTruePion.px(), subleadingTruePion.py()), eta(subleadingTruePion.px(), subleadingTruePion.py(), subleadingTruePion.pz()), phi(subleadingTruePion.px(), subleadingTruePion.py()),
pt(subleadingRecoPion.px(), subleadingRecoPion.py()), eta(subleadingRecoPion.px(), subleadingRecoPion.py(), subleadingRecoPion.pz()), phi(subleadingRecoPion.px(), subleadingRecoPion.py()));
}
PROCESS_SWITCH(UpcRhoAnalysis, processResolution, "check resolution of kinematic variables", false);

Expand Down
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