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[PWGLF] heavyionmultiplicity: DCA cut studies #16984

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Merged
abmodak merged 4 commits into from
Jul 9, 2026
+83 −5
Merged

[PWGLF] heavyionmultiplicity: DCA cut studies #16984

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279d12b
adding process functions to study DCA selections
murioni Jul 6, 2026
e0a0f31
modified DCA cut filter
murioni Jul 7, 2026
a46eb20
added custom DCA cut pT dependent
murioni Jul 8, 2026
f99476e
fixing formatting
murioni Jul 9, 2026
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88 changes: 83 additions & 5 deletions PWGLF/Tasks/GlobalEventProperties/heavyionMultiplicity.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@
#include "PWGLF/DataModel/LFStrangenessTables.h"

#include "Common/CCDB/EventSelectionParams.h"
#include "Common/Core/TrackSelection.h"
#include "Common/Core/TrackSelectionDefaults.h"
Comment on lines +21 to +22

@vkucera vkucera Jul 10, 2026

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None of these headers is used. Why did you add them?

#include "Common/DataModel/Centrality.h"
#include "Common/DataModel/EventSelection.h"
#include "Common/DataModel/McCollisionExtra.h"
Expand Down Expand Up @@ -127,8 +129,7 @@
TrackSelectionFlags::kTPCNCls |
TrackSelectionFlags::kTPCCrossedRowsOverNCls |
TrackSelectionFlags::kTPCChi2NDF;
static constexpr TrackSelectionFlags::flagtype TrackSelectionDca =
TrackSelectionFlags::kDCAz | TrackSelectionFlags::kDCAxy;
// static constexpr TrackSelectionFlags::flagtype TrackSelectionDca = TrackSelectionFlags::kDCAz | TrackSelectionFlags::kDCAxy;
static constexpr TrackSelectionFlags::flagtype TrackSelectionDcaxyOnly =
TrackSelectionFlags::kDCAxy;

Expand Down Expand Up @@ -159,7 +160,7 @@

Configurable<float> etaRange{"etaRange", 1.0f, "Eta range to consider"};
Configurable<float> vtxRange{"vtxRange", 10.0f, "Vertex Z range to consider"};
Configurable<float> dcaZ{"dcaZ", 0.2f, "Custom DCA Z cut (ignored if negative)"};
Configurable<float> dcaZ{"dcaZ", 0.2f, "Custom DCA Z cut"};
Configurable<float> v0radiusK0SCut{"v0radiusK0SCut", 1.2f, "K0S RadiusCut"};
Configurable<float> dcapostopvK0SCut{"dcapostopvK0SCut", 0.05f, "K0S dcapostopvCut"};
Configurable<float> dcanegtopvK0SCut{"dcanegtopvK0SCut", 0.05f, "K0S dcanegtopvCut"};
Expand Down Expand Up @@ -218,6 +219,14 @@
Configurable<bool> selectCollidingBCs{"selectCollidingBCs", true, "BC analysis: select colliding BCs"};
Configurable<bool> selectTVX{"selectTVX", true, "BC analysis: select TVX"};
Configurable<bool> selectFV0OrA{"selectFV0OrA", true, "BC analysis: select FV0OrA"};
Configurable<bool> isApplyDCAstandardcuts{"isApplyDCAstandardcuts", true, "Apply DCA standard run 2 cuts"};
Configurable<bool> isApplyDCAcustomcuts{"isApplyDCAcustomcuts", false, "Apply DCA custom cuts"};
Configurable<float> cDcazP0{"cDcazP0", 1.0f, "dcaz parameter0"};
Configurable<float> cDcazP1{"cDcazP1", 1.0f, "dcaz parameter1"};
Configurable<float> cDcazP2{"cDcazP2", 1.0f, "dcaz parameter2"};
Configurable<float> cDcaxyP0{"cDcaxyP0", 1.0f, "dcaxy parameter0"};
Configurable<float> cDcaxyP1{"cDcaxyP1", 1.0f, "dcaxy parameter1"};
Configurable<float> cDcaxyP2{"cDcaxyP2", 1.0f, "dcaxy parameter2"};

void init(InitContext const&)
{
Expand Down Expand Up @@ -250,6 +259,18 @@
x->SetBinLabel(9, "ApplyNoHighMultCollInPrevRof");
x->SetBinLabel(10, "INEL > 0");

if (doprocessDCAvsptData) {
histos.add("hdcaxyvspt", "dca to pv in the xy plane", kTH2D, {dcaAxis, axisPt}, false);
histos.add("hdcazvspt", "dca to pv in the z axis", kTH2D, {dcaAxis, axisPt}, false);
}

if (doprocessDCAvsptMC) {
histos.add("hdcaxyvsptMC", "dca to pv in the xy plane MC", kTH2D, {dcaAxis, axisPt}, false);
histos.add("hdcazvsptMC", "dca to pv in the z axis MC", kTH2D, {dcaAxis, axisPt}, false);
histos.add("hdcaxyvsptMCprimary", "dca to pv in the xy plane MC primary particles", kTH2D, {dcaAxis, axisPt}, false);
histos.add("hdcazvsptMCprimary", "dca to pv in the z axis MC primary particles", kTH2D, {dcaAxis, axisPt}, false);
}

if (doprocessData) {
histos.add("hdcaxy", "dca to pv in the xy plane", kTH1D, {dcaAxis}, false);
histos.add("hdcaz", "dca to pv in the z axis", kTH1D, {dcaAxis}, false);
Expand Down Expand Up @@ -484,6 +505,12 @@
template <typename CheckTrack>
bool isTrackSelected(CheckTrack const& track)
{
if (isApplyDCAcustomcuts) {
if (std::abs(track.dcaXY()) > cDcaxyP0 + cDcaxyP1 / pow(track.pt(), cDcaxyP2))

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[std-prefix] 

Use std:: prefix for names from the std namespace.
return false;
if (std::abs(track.dcaZ()) > cDcazP0 + cDcazP1 / pow(track.pt(), cDcazP2))

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[std-prefix] 

Use std:: prefix for names from the std namespace.
return false;
}
if (std::abs(track.eta()) >= etaRange) {
return false;
}
Expand Down Expand Up @@ -522,8 +549,57 @@
ncheckbit(aod::track::trackCutFlag, TrackSelectionIts) &&
ifnode(ncheckbit(aod::track::v001::detectorMap, (uint8_t)o2::aod::track::TPC),
ncheckbit(aod::track::trackCutFlag, TrackSelectionTpc), true) &&
ifnode(dcaZ.node() > 0.f, nabs(aod::track::dcaZ) <= dcaZ && ncheckbit(aod::track::trackCutFlag, TrackSelectionDcaxyOnly),
ncheckbit(aod::track::trackCutFlag, TrackSelectionDca));
ifnode(isApplyDCAstandardcuts.node(), nabs(aod::track::dcaZ) <= dcaZ && ncheckbit(aod::track::trackCutFlag, TrackSelectionDcaxyOnly), true);

void processDCAvsptData(CollisionDataTable::iterator const& cols, FilTrackDataTable const& tracks)
{
if (!isEventSelected(cols)) {
return;
}

for (const auto& track : tracks) {

if (!isTrackSelected(track))
continue;

histos.fill(HIST("hdcaxyvspt"), track.dcaXY(), track.pt());
histos.fill(HIST("hdcazvspt"), track.dcaZ(), track.pt());
}
}

void processDCAvsptMC(soa::Join<CollisionMCTrueTable, aod::McCollsExtra>::iterator const& mcCollision, CollisionMCRecTable const& RecCols, TrackMCTrueTable const&, FilTrackMCRecTable const& RecTracks)
{

for (const auto& RecCol : RecCols) {
if (!isEventSelected(RecCol)) {
continue;
}
if (RecCol.globalIndex() != mcCollision.bestCollisionIndex()) {
continue;
}

auto recTracksPart = RecTracks.sliceBy(perCollision, RecCol.globalIndex());

for (const auto& Rectrack : recTracksPart) {

if (!isTrackSelected(Rectrack))
continue;

if (!Rectrack.has_mcParticle())
continue;

histos.fill(HIST("hdcaxyvsptMC"), Rectrack.dcaXY(), Rectrack.pt());
histos.fill(HIST("hdcazvsptMC"), Rectrack.dcaZ(), Rectrack.pt());

auto mcpart = Rectrack.mcParticle();

if (!isGenTrackSelected(mcpart)) {
histos.fill(HIST("hdcaxyvsptMCprimary"), Rectrack.dcaXY(), Rectrack.pt());
histos.fill(HIST("hdcazvsptMCprimary"), Rectrack.dcaZ(), Rectrack.pt());
}
}
}
}

void processData(CollisionDataTable::iterator const& cols, FilTrackDataTable const& tracks)
{
Expand Down Expand Up @@ -771,10 +847,10 @@
if (std::abs(particle.eta()) < 1.0) {
multBarrelEta10++;
}
if (-3.3 < particle.eta() && particle.eta() < -2.1) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
multFT0C++;
}
if (3.5 < particle.eta() && particle.eta() < 4.9) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
multFT0A++;
}
}
Expand Down Expand Up @@ -1020,7 +1096,7 @@
if (selectFV0OrA && !multbc.multFV0OrA())
return;
histos.fill(HIST("BcHist"), 4); // FV0OrA
if (vtxRange < 100.0f) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
if (!multbc.multFT0PosZValid())
return;
if (TMath::Abs(multbc.multFT0PosZ()) > vtxRange)
Expand All @@ -1033,6 +1109,8 @@
histos.fill(HIST("BcCentFT0MHist"), multbc.centFT0M());
}

PROCESS_SWITCH(HeavyionMultiplicity, processDCAvsptData, "process DCA data", false);
PROCESS_SWITCH(HeavyionMultiplicity, processDCAvsptMC, "process DCA MC", false);
PROCESS_SWITCH(HeavyionMultiplicity, processData, "process data CentFT0C", false);
PROCESS_SWITCH(HeavyionMultiplicity, processCorrelation, "do correlation study in data", false);
PROCESS_SWITCH(HeavyionMultiplicity, processMonteCarlo, "process MC CentFT0C", false);
Expand Down
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