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[PWGLF] Adding event and track level qa histograms for MFT analysis #16717

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Merged
abmodak merged 3 commits into from
Jun 18, 2026
+91 −2
Merged

[PWGLF] Adding event and track level qa histograms for MFT analysis #16717

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98cfb1e
Adding event and track level qa histograms for MFT analysis
tutripat Jun 17, 2026
3ec51be
Please consider the following formatting changes
alibuild Jun 17, 2026
d134dfe
Merge pull request #17 from alibuild/alibot-cleanup-16717
tutripat Jun 17, 2026
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93 changes: 91 additions & 2 deletions PWGLF/Tasks/GlobalEventProperties/PseudorapidityDensityMFT.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -400,7 +400,8 @@ struct PseudorapidityDensityMFT {
Configurable<bool> useTriggerTVX{"useTriggerTVX", true, "Require kIsTriggerTVX in processGenReco"};
Configurable<bool> useNoTimeFrameBorderCut{"useNoTimeFrameBorderCut", true, "Require kNoTimeFrameBorder in processGenReco"};
Configurable<bool> useNoITSROFrameBorderCut{"useNoITSROFrameBorderCut", true, "Require kNoITSROFrameBorder in processGenReco"};

AxisSpec multAxisRecoMFT = {multBinning, "N_{ch}^{reco,MFT}"};
AxisSpec multAxisGenMFT = {multBinning, "N_{ch}^{gen,MFT}"};
HistogramRegistry registry{
"registry",
{
Expand Down Expand Up @@ -630,6 +631,22 @@ struct PseudorapidityDensityMFT {
registry.add({"Purity/reco/PNchMFT_afterCuts",
";N_{trk}^{MFT} (selected);events",
{HistType::kTH1F, {multAxis}}});
// MC P(Nch) objects for MFT multiplicity unfolding/correction.
// Generator multiplicity: primary charged particles in the MFT acceptance,
// with generated INEL>0 defined from the central estimator.
// Reco multiplicity: selected reassociated MFT tracks for matched accepted reco events.
registry.add({"PNchMC/gen_inelgt0",
";N_{ch}^{gen,MFT};events",
{HistType::kTH1F, {multAxisGenMFT}}});

registry.add({"PNchMC/reco_sel8_inelgt0",
";N_{ch}^{reco,MFT};events",
{HistType::kTH1F, {multAxisRecoMFT}}});

registry.add({"PNchMC/responseMatrix",
";N_{ch}^{reco,MFT};N_{ch}^{gen,MFT};events",
{HistType::kTH2F, {multAxisRecoMFT, multAxisGenMFT}}});

registry.add({"Purity/DCAyVsDCAx_Right",
";DCA_{x} (cm);DCA_{y} (cm)",
{HistType::kTH2F, {dcaXAxis, dcaYAxis}}});
Expand Down Expand Up @@ -1214,6 +1231,27 @@ struct PseudorapidityDensityMFT {
" ; N_{Trk}^{nonamb}",
{HistType::kTH1F, {{701, -0.5, 700.5}}}}); //

// Event-level P(Nch) distributions for reassociated MFT tracks.
// Fill once per collision after counting selected reassociated MFT tracks.
registry.add({"PNch/MFT_sel8",
";N_{ch}^{MFT};events",
{HistType::kTH1F, {multAxis}}});
registry.add({"PNch/MFT_sel8_inelgt0",
";N_{ch}^{MFT};events",
{HistType::kTH1F, {multAxis}}});
registry.add({"PNch/MFT_sel8_inelfwdgt0",
";N_{ch}^{MFT};events",
{HistType::kTH1F, {multAxis}}});
registry.add({"PNch/MFT_sel8_inelgt0_nonamb",
";N_{ch}^{MFT, nonamb};events",
{HistType::kTH1F, {multAxis}}});
registry.add({"PNch/MFT_sel8_inelgt0_amb",
";N_{ch}^{MFT, amb};events",
{HistType::kTH1F, {multAxis}}});
registry.add({"PNch/MFTZvtx_sel8_inelgt0",
";N_{ch}^{MFT};#it{z}_{vtx} (cm);events",
{HistType::kTH2F, {multAxis, zAxis}}});

registry.add({"Tracks/Control/amb/AmbTracksPhiEta",
"; #varphi; #eta; tracks",
{HistType::kTH2F, {phiAxis, etaBinning}}}); //
Expand Down Expand Up @@ -1542,6 +1580,10 @@ struct PseudorapidityDensityMFT {
std::unordered_set<int> eventsInelMFT;
std::unordered_set<int> eventsInel;

int64_t nMFTSelected{0};
int64_t nMFTSelectedAmb{0};
int64_t nMFTSelectedNonAmb{0};

const auto fillDataCut = [&](DataCutBin bin) {
registry.fill(HIST("EventSelectionData"), static_cast<int>(bin));
};
Expand Down Expand Up @@ -1655,6 +1697,13 @@ struct PseudorapidityDensityMFT {
if (failTrackCuts) {
continue;
}
++nMFTSelected;
if (retrack.ambDegree() > SingleCompatibleCollision) {
++nMFTSelectedAmb;
} else if (retrack.ambDegree() == SingleCompatibleCollision) {
++nMFTSelectedNonAmb;
}

registry.fill(HIST("Tracks/Control/TrackAmbDegree"),
retrack.ambDegree());
registry.fill(HIST("Tracks/Control/DCAXY"), retrack.bestDCAXY());
Expand Down Expand Up @@ -1771,6 +1820,17 @@ struct PseudorapidityDensityMFT {
registry.fill(HIST("Tracks/Control/nonamb/nTrkNonAmb"), j);
registry.fill(HIST("Tracks/Control/woOrp/nTrk"), k);
registry.fill(HIST("hNumCollisions_Inel"), 1, eventsInel.size());

registry.fill(HIST("PNch/MFT_sel8"), nMFTSelected);
if (midtracks.size() > 0) {
registry.fill(HIST("PNch/MFT_sel8_inelgt0"), nMFTSelected);
registry.fill(HIST("PNch/MFTZvtx_sel8_inelgt0"), nMFTSelected, z);
registry.fill(HIST("PNch/MFT_sel8_inelgt0_nonamb"), nMFTSelectedNonAmb);
registry.fill(HIST("PNch/MFT_sel8_inelgt0_amb"), nMFTSelectedAmb);
if (nMFTSelected > 0) {
registry.fill(HIST("PNch/MFT_sel8_inelfwdgt0"), nMFTSelected);
}
}
}

void processMultReassoc(CollwEv::iterator const& collision,
Expand Down Expand Up @@ -2413,6 +2473,7 @@ struct PseudorapidityDensityMFT {
bool onlyVzGt0 = false; // EtaZvtxGen_gt0t
bool atLeastOneSel8Vz = false; // EtaZvtxGen
bool atLeastOneSel8VzGt0 = false; // EtaZvtxGen_gt0
bool hasRecoCollisionForPNch{false};

const auto fillGenRecoCut = [&](GenRecoCutBin bin) {
registry.fill(HIST("EventsRecoCuts_GenReco"), static_cast<int>(bin));
Expand Down Expand Up @@ -2567,6 +2628,7 @@ struct PseudorapidityDensityMFT {
acceptedRecoCols.insert(recoCol);
recoCollisionIds.insert(recoCol);
trueMCCollisionIds.insert(mcCol);
hasRecoCollisionForPNch = true;

if (mcCol >= 0) {
recoToMc[recoCol] = mcCol;
Expand Down Expand Up @@ -2603,7 +2665,9 @@ struct PseudorapidityDensityMFT {
int64_t woOrpCount = 0;
bool filledRight = false;
bool filledWrong = false;
int nMftSelectedAfterCuts = 0;
int64_t nMftSelectedAfterCuts{0};
int64_t nRecoMFTSelectedForPNch{0};
int64_t nGenPrimaryChargedMFT{0};
std::unordered_set<int> uniqueBestRecoCols;

if (tracks.size() > 0) {
Expand Down Expand Up @@ -2689,6 +2753,11 @@ struct PseudorapidityDensityMFT {
failDCAzCut = useDCAzCut && (std::abs(dcaZCut) > maxDCAz);
// std::cout <<" dcaZReco " <<dcaZReco<< " maxDCAz "<<maxDCAz<<std::endl;
}
if (failDCAzCut) {
continue;
}

++nRecoMFTSelectedForPNch;

const bool hasMcLabel = track.has_mcParticle();
const bool isFakeByLabel = hasMcLabel ? (track.mcMask() != 0) : false;
Expand Down Expand Up @@ -3227,6 +3296,26 @@ struct PseudorapidityDensityMFT {
}
}
}
if (particle.isPhysicalPrimary()) {

++nGenPrimaryChargedMFT;
}
}
}
if ((mcCollision.posZ() >= cfgVzCut1) && (mcCollision.posZ() <= cfgVzCut2)) {
if (nChargedCentral > 0) {

registry.fill(HIST("PNchMC/gen_inelgt0"),
nGenPrimaryChargedMFT);

if (hasRecoCollisionForPNch) {
registry.fill(HIST("PNchMC/reco_sel8_inelgt0"),
nRecoMFTSelectedForPNch);

registry.fill(HIST("PNchMC/responseMatrix"),
nRecoMFTSelectedForPNch,
nGenPrimaryChargedMFT);
}
}
}
}
Expand Down
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