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[PWGLF] Add ITS PID signals to Antineutron CEX task and extend LFAntinCexTables #13901

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Merged
maciacco merged 2 commits into from
Nov 21, 2025
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[PWGLF] Add ITS PID signals to Antineutron CEX task and extend LFAntinCexTables #13901

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282ee7f
Add ITS PID signals to Antineutron CEX task and extend LFAntinCexTables
FabiolaLP Nov 19, 2025
e1cc774
Apply clang-format and whitespace fixes
FabiolaLP Nov 20, 2025
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14 changes: 13 additions & 1 deletion PWGLF/DataModel/LFAntinCexTables.h
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Original file line number Diff line number Diff line change
Expand Up @@ -94,15 +94,25 @@
DECLARE_SOA_COLUMN(DPairPz, dPairPz, float);
DECLARE_SOA_COLUMN(DOpenAngle, dOpenAngle, float);

DECLARE_SOA_COLUMN(SVNearestLayerId, svNearestLayerId, int16_t);

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[name/o2-column] 

Use UpperCamelCase for names of O2 columns and matching lowerCamelCase names for their getters.
DECLARE_SOA_COLUMN(SVDeltaRToLayer, svDeltaRToLayer, float);

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[name/o2-column] 

Use UpperCamelCase for names of O2 columns and matching lowerCamelCase names for their getters.

DECLARE_SOA_COLUMN(PTrkItsHitMap, pTrkItsHitMap, uint16_t);
DECLARE_SOA_COLUMN(APTrkItsHitMap, apTrkItsHitMap, uint16_t);

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[name/o2-column] 

Use UpperCamelCase for names of O2 columns and matching lowerCamelCase names for their getters.
DECLARE_SOA_COLUMN(PLayersOk, pLayersOk, int8_t);
DECLARE_SOA_COLUMN(APLayersOk, apLayersOk, int8_t);

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[name/o2-column] 

Use UpperCamelCase for names of O2 columns and matching lowerCamelCase names for their getters.

DECLARE_SOA_COLUMN(PVtxZ, pVtxZ, float);

// Proton ITS PID
DECLARE_SOA_COLUMN(PTrkItsNSigmaPr, pTrkItsNSigmaPr, float);
DECLARE_SOA_COLUMN(PTrkItsPidValid, pTrkItsPidValid, int8_t);
DECLARE_SOA_COLUMN(PTrkTgl, pTrkTgl, float);

// Antiproton ITS PID
DECLARE_SOA_COLUMN(AntipTrkItsNSigmaPr, antipTrkItsNSigmaPr, float);
DECLARE_SOA_COLUMN(AntipTrkItsPidValid, antipTrkItsPidValid, int8_t);
DECLARE_SOA_COLUMN(AntipTrkTgl, antipTrkTgl, float);
} // namespace antin_cex

// Table
Expand All @@ -123,7 +133,9 @@
antin_cex::DPairP, antin_cex::DPairPt, antin_cex::DPairPz, antin_cex::DOpenAngle,
antin_cex::SVNearestLayerId, antin_cex::SVDeltaRToLayer,
antin_cex::PTrkItsHitMap, antin_cex::APTrkItsHitMap, antin_cex::PLayersOk, antin_cex::APLayersOk,
antin_cex::PVtxZ);
antin_cex::PVtxZ,
antin_cex::PTrkItsNSigmaPr, antin_cex::PTrkItsPidValid, antin_cex::PTrkTgl,
antin_cex::AntipTrkItsNSigmaPr, antin_cex::AntipTrkItsPidValid, antin_cex::AntipTrkTgl);

} // namespace o2::aod

Expand Down
93 changes: 77 additions & 16 deletions PWGLF/TableProducer/Nuspex/nucleiAntineutronCex.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -15,21 +15,23 @@
/// \author Fabiola Lugo
///

#include "PWGLF/DataModel/LFAntinCexTables.h"

#include "CommonConstants/MathConstants.h"
#include "DCAFitter/DCAFitterN.h"
#include "DetectorsBase/Propagator.h"
#include "Framework/AnalysisDataModel.h"
#include "Framework/AnalysisTask.h"
#include "Framework/Logger.h"
#include "Framework/runDataProcessing.h"
#include "ReconstructionDataFormats/TrackParametrization.h"

#include "TMCProcess.h"
#include "TMath.h"
#include "TPDGCode.h"
#include "TVector3.h"
#include <PWGLF/DataModel/LFAntinCexTables.h>

#include <Common/DataModel/PIDResponseITS.h>

#include <CommonConstants/MathConstants.h>
#include <DCAFitter/DCAFitterN.h>
#include <DetectorsBase/Propagator.h>
#include <Framework/AnalysisDataModel.h>
#include <Framework/AnalysisTask.h>
#include <Framework/Logger.h>
#include <Framework/runDataProcessing.h>
#include <ReconstructionDataFormats/TrackParametrization.h>

#include <TMCProcess.h>
#include <TMath.h>
#include <TPDGCode.h>
#include <TVector3.h>

#include <algorithm>
#include <array>
Expand Down Expand Up @@ -157,6 +159,20 @@ struct NucleiAntineutronCex {
histos.add("vtxfit_mc_dY", "SV residual Y (fit - MC);#Delta Y (cm);Entries", kTH1F, {{400, -20., 20.}});
histos.add("vtxfit_mc_dZ", "SV residual Z (fit - MC);#Delta Z (cm);Entries", kTH1F, {{400, -20., 20.}});
histos.add("vtxfit_mc_d3D", "SV distance |fit - MC|;#Delta r (cm);Entries", kTH1F, {{300, 0., 30.}});

// ITS PID (protons / antiprotons, reconstructed tracks)
histos.add("pItsNsigmaPr", "ITS n#sigma (p hyp., proton);n#sigma_{ITS}(p);Entries", kTH1F, {{100, -10., 10.}});
histos.add("apItsNsigmaPr", "ITS n#sigma (p hyp., antiproton);n#sigma_{ITS}(p);Entries", kTH1F, {{100, -10., 10.}});
histos.add("pItsPidValid", "ITS PID valid flag (proton);PidValid;Entries", kTH1F, {{2, 0., 2.}});
histos.add("apItsPidValid", "ITS PID valid flag (antiproton);PidValid;Entries", kTH1F, {{2, 0., 2.}});
histos.add("pTgl", "tgl (proton track);tgl;Entries", kTH1F, {{100, -2., 2.}});
histos.add("apTgl", "tgl (antiproton track);tgl;Entries", kTH1F, {{100, -2., 2.}});
histos.add("pItsNsigmaPr_bg", "ITS n#sigma (p hyp., proton);n#sigma_{ITS}(p);Entries", kTH1F, {{100, -10., 10.}});
histos.add("apItsNsigmaPr_bg", "ITS n#sigma (p hyp., antiproton);n#sigma_{ITS}(p);Entries", kTH1F, {{100, -10., 10.}});
histos.add("pItsPidValid_bg", "ITS PID valid flag (proton);PidValid;Entries", kTH1F, {{2, 0., 2.}});
histos.add("apItsPidValid_bg", "ITS PID valid flag (antiproton);PidValid;Entries", kTH1F, {{2, 0., 2.}});
histos.add("pTgl_bg", "tgl (proton track);tgl;Entries", kTH1F, {{100, -2., 2.}});
histos.add("apTgl_bg", "tgl (antiproton track);tgl;Entries", kTH1F, {{100, -2., 2.}});
}

static o2::track::TrackParCov makeTPCovFromAOD(const TracksWCovMc::iterator& tr)
Expand Down Expand Up @@ -495,6 +511,9 @@ struct NucleiAntineutronCex {
// int antip_trk_nClsTPC = 0;
int antipTrkNClsIts = 0;
uint16_t apItsMap = 0;
float pTrkItsNSigmaPr = -999.f;
int8_t pTrkItsPidValid = 0;
float pTrkTgl = 0.f;

bool pLayers = false;
bool pHasTrack = false;
Expand All @@ -507,6 +526,11 @@ struct NucleiAntineutronCex {
// int p_trk_nClsTPC = 0;
int pTrkNClsIts = 0;
uint16_t pItsMap = 0;
float antipTrkItsNSigmaPr = -999.f;
int8_t antipTrkItsPidValid = 0;
float antipTrkTgl = 0.f;

o2::aod::ITSResponse itsResponse;

for (const auto& track : tracks) {
if (!track.has_mcParticle())
Expand Down Expand Up @@ -542,11 +566,25 @@ struct NucleiAntineutronCex {
antipTrkTpcSignal = track.tpcSignal();
// antip_trk_nClsTPC = track.tpcNCls();
antipTrkNClsIts = track.itsNCls();
antipTrkTgl = track.tgl();
const auto nsigmaITSantip = itsResponse.nSigmaITS<o2::track::PID::Proton>(track);
antipTrkItsNSigmaPr = static_cast<float>(nsigmaITSantip);
antipTrkItsPidValid = std::isfinite(nsigmaITSantip) ? 1 : 0;
antipHasTrack = true;
apItsMap = static_cast<uint16_t>(track.itsClusterMap());
antipLayers = (apItsMap != 0);
if (layerCondition)
antipLayers = true;
if (motherPdg == -kNeutron) {
histos.fill(HIST("apItsNsigmaPr"), antipTrkItsNSigmaPr);
histos.fill(HIST("apItsPidValid"), antipTrkItsPidValid);
histos.fill(HIST("apTgl"), antipTrkTgl);
}
if (motherPdg != -kNeutron) {
histos.fill(HIST("apItsNsigmaPr_bg"), antipTrkItsNSigmaPr);
histos.fill(HIST("apItsPidValid_bg"), antipTrkItsPidValid);
histos.fill(HIST("apTgl_bg"), antipTrkTgl);
}
} else if (mc.globalIndex() == pId) {
pTrkP = track.p();
pTrkPx = track.px();
Expand All @@ -556,11 +594,26 @@ struct NucleiAntineutronCex {
pTrkTpcSignal = track.tpcSignal();
// p_trk_nClsTPC = track.tpcNCls();
pTrkNClsIts = track.itsNCls();
pTrkTgl = track.tgl();
const auto nsigmaITSp =
itsResponse.nSigmaITS<o2::track::PID::Proton>(track);
pTrkItsNSigmaPr = static_cast<float>(nsigmaITSp);
pTrkItsPidValid = std::isfinite(nsigmaITSp) ? 1 : 0;
pHasTrack = true;
pItsMap = static_cast<uint16_t>(track.itsClusterMap());
pLayers = (pItsMap != 0);
if (layerCondition)
pLayers = true;
if (motherPdg == -kNeutron) {
histos.fill(HIST("pItsNsigmaPr"), pTrkItsNSigmaPr);
histos.fill(HIST("pItsPidValid"), pTrkItsPidValid);
histos.fill(HIST("pTgl"), pTrkTgl);
}
if (motherPdg == -kNeutron) {
histos.fill(HIST("pItsNsigmaPr_bg"), pTrkItsNSigmaPr);
histos.fill(HIST("pItsPidValid_bg"), pTrkItsPidValid);
histos.fill(HIST("pTgl_bg"), pTrkTgl);
}
}
}
if (!(pHasTrack && antipHasTrack))
Expand Down Expand Up @@ -782,7 +835,15 @@ struct NucleiAntineutronCex {
static_cast<int8_t>(pLayers ? 1 : 0),
static_cast<int8_t>(antipLayers ? 1 : 0),

pvtxZ);
pvtxZ,

pTrkItsNSigmaPr,
pTrkItsPidValid,
pTrkTgl,

antipTrkItsNSigmaPr,
antipTrkItsPidValid,
antipTrkTgl);
}
}
// ==== end DCAFitter2 ====
Expand Down
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