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Merged
romainschotter merged 6 commits into from
Jun 22, 2026
+76 −26
Merged

[PWGLF] minor changes in the K892 related task #16763

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69de705
Some additional histograms and added TPC selection
Oussama3030 Jun 22, 2026
3b95aea
Please consider the following formatting changes
alibuild Jun 22, 2026
38ca630
Merge pull request #12 from alibuild/alibot-cleanup-16763
Oussama3030 Jun 22, 2026
0f53aa8
o2linter fix
Oussama3030 Jun 22, 2026
8485df9
Please consider the following formatting changes
alibuild Jun 22, 2026
16403b8
Merge pull request #13 from alibuild/alibot-cleanup-16763
Oussama3030 Jun 22, 2026
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28 changes: 15 additions & 13 deletions PWGLF/TableProducer/Strangeness/sigma0builder.cxx
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@@ -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.)
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
Expand All @@ -9,17 +9,11 @@
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
//
// This is a task that employs the standard V0 tables and attempts to combine
// two V0s into a Sigma0 -> Lambda + gamma candidate.
// *+-+*+-+*+-+*+-+*+-+*+-+*+-+*+-+*
// Sigma0 builder task
// *+-+*+-+*+-+*+-+*+-+*+-+*+-+*+-+*
//
// Comments, questions, complaints, suggestions?
// Please write to:
// gianni.shigeru.setoue.liveraro@cern.ch
// oussama.benchikhi@cern.ch
//

/// \file sigma0builder.cxx
/// \brief This is a task that employs the standard V0 tables and attempts to combine two V0s into a Sigma0 -> Lambda + gamma candidate.
/// \author Gianni Shigeru Setoue Liveraro
/// \author Oussama Benchikhi

#include "PWGEM/PhotonMeson/Utils/MCUtilities.h"
#include "PWGJE/DataModel/EMCALClusters.h"
Expand Down Expand Up @@ -190,8 +184,8 @@
// Lambda criteria:
struct : ConfigurableGroup {
std::string prefix = "lambdaSelections"; // JSON group name
Configurable<float> Lambda_MLThreshold{"Lambda_MLThreshold", 0.1, "Decision Threshold value to select lambdas"};

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[name/configurable] 

Use lowerCamelCase for names of configurables and use the same name for the struct member as for the JSON string. (Declare the type and names on the same line.)
Configurable<float> AntiLambda_MLThreshold{"AntiLambda_MLThreshold", 0.1, "Decision Threshold value to select antilambdas"};

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[name/configurable] 

Use lowerCamelCase for names of configurables and use the same name for the struct member as for the JSON string. (Declare the type and names on the same line.)
Configurable<bool> doMCAssociation{"doMCAssociation", false, "if MC, select true lambda/alambdas only"};
Configurable<float> LambdaMinDCANegToPv{"LambdaMinDCANegToPv", .05, "min DCA Neg To PV (cm)"};
Configurable<float> LambdaMinDCAPosToPv{"LambdaMinDCAPosToPv", .05, "min DCA Pos To PV (cm)"};
Expand Down Expand Up @@ -286,6 +280,7 @@
Configurable<bool> KShortRejectPosITSafterburner{"KShortRejectPosITSafterburner", false, "reject positive track formed out of afterburner ITS tracks"};
Configurable<bool> KShortRejectNegITSafterburner{"KShortRejectNegITSafterburner", false, "reject negative track formed out of afterburner ITS tracks"};
Configurable<float> KShortArmenterosCoefficient{"KShortArmenterosCoefficient", 0.2, "Armenteros-Podolanski coefficient to reject lambdas"};
Configurable<float> KShortMaxTPCNSigmas{"KShortMaxTPCNSigmas", 1e+9, "Max |TPC NSigma| (pion hypothesis) for K0S daughters"};
} kshortSelections;

// KStar criteria:
Expand Down Expand Up @@ -477,8 +472,9 @@
histos.get<TH1>(HIST("PhotonSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(9, "Z");
histos.get<TH1>(HIST("PhotonSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(10, "CosPA");
histos.get<TH1>(HIST("PhotonSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(11, "Phi");
histos.get<TH1>(HIST("PhotonSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(12, "TPCCR");
histos.get<TH1>(HIST("PhotonSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(13, "TPC NSigma");
histos.get<TH1>(HIST("PhotonSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(12, "Armenteros");
histos.get<TH1>(HIST("PhotonSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(13, "TPCCR");
histos.get<TH1>(HIST("PhotonSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(14, "TPC NSigma");

if (doprocessPCMVsEMCalQA) {
histos.add("EMCalPhotonSel/hSelectionStatistics", "hSelectionStatistics", kTH1D, {axisConfig.axisCandSel});
Expand Down Expand Up @@ -545,6 +541,7 @@
histos.get<TH1>(HIST("KShortSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(12, "TPCCR");
histos.get<TH1>(HIST("KShortSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(13, "ITSNCls");
histos.get<TH1>(HIST("KShortSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(14, "Lifetime");
histos.get<TH1>(HIST("KShortSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(15, "TPC NSigma");

if (doprocessRealData || doprocessRealDataWithTOF || doprocessRealDataWithEMCal || doprocessMonteCarlo || doprocessMonteCarloWithTOF || doprocessMonteCarloWithEMCal) {
histos.add("SigmaSel/hSigma0DauDeltaIndex", "hSigma0DauDeltaIndex", kTH1F, {{100, -49.5f, 50.5f}});
Expand Down Expand Up @@ -1293,7 +1290,7 @@
}
if (fillHists)
histos.fill(HIST("hEventSelection"), 16 /* INEL > 0 */);
if (eventSelections.requireINEL1 && collision.multNTracksPVeta1() < 2) {

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return false;
}
if (fillHists)
Expand Down Expand Up @@ -1406,7 +1403,7 @@
continue;
}

if (eventSelections.requireINEL1 && mcCollision.multMCNParticlesEta10() < 2) {

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}
}
Expand Down Expand Up @@ -1483,7 +1480,7 @@
continue;
}

if (eventSelections.requireINEL1 && mcCollision.multMCNParticlesEta10() < 2) {

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continue;
}
}
Expand Down Expand Up @@ -1614,7 +1611,7 @@
for (auto const& daughter : daughters) {
histos.fill(HIST("GenQA/h2dSigma0NDaughtersVsPDG"), daughters.size(), daughter.pdgCode());

if (GenInfo.NDaughters == 2) {

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if (daughter.pdgCode() == PDG_t::kGamma)
GenInfo.MCDau1Pt = daughter.pt();

Expand Down Expand Up @@ -2206,6 +2203,11 @@
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 14.);
if (((TMath::Abs(posTrackKShort.tpcNSigmaPi()) > kshortSelections.KShortMaxTPCNSigmas) ||
(TMath::Abs(negTrackKShort.tpcNSigmaPi()) > kshortSelections.KShortMaxTPCNSigmas)))
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 15.);
}
return true;
}
Expand Down Expand Up @@ -2967,7 +2969,7 @@
auto v0MC = v0.template v0MCCore_as<soa::Join<aod::V0MCCores, aod::V0MCCollRefs>>();
auto mcv0Photon = mcparticles.rawIteratorAt(v0MC.particleIdMC());

if (mcv0Photon.pdgCode() != PDG_t::kGamma || !mcv0Photon.isPhysicalPrimary() || TMath::Abs(mcv0Photon.y()) > 0.5)

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// MC pT histo
Expand Down Expand Up @@ -3057,7 +3059,7 @@
// Select TRUE + PRIMARY photons
// ============================================================

if (mcPhoton.pdgCode() != PDG_t::kGamma || !mcPhoton.isPhysicalPrimary() || TMath::Abs(mcPhoton.y()) > 0.5)

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// ============================================================
Expand Down Expand Up @@ -3114,7 +3116,7 @@

// Process MC generated photons
for (const auto& mcpart : mcparticles) {
if (mcpart.pdgCode() != PDG_t::kGamma || !mcpart.isPhysicalPrimary() || TMath::Abs(mcpart.y()) > 0.5)

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continue;

histos.fill(HIST("PhotonMCQA/hGenPhoton"), mcpart.pt());
Expand Down
74 changes: 61 additions & 13 deletions PWGLF/Tasks/Resonances/k892hadronphotonBkg.cxx
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Expand Up @@ -8,17 +8,10 @@
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
//
// This is a ask that computes the same-event rotational and the
// mixed-event combinatorial backgrounds for the K*(892) -> K0S + gamma analysis.
// *+-+*+-+*+-+*+-+*+-+*+-+*+-+*+-+*
// K892 hadron-photon background task
// *+-+*+-+*+-+*+-+*+-+*+-+*+-+*+-+*
//
// Comments, questions, complaints, suggestions?
// Please write to:
// oussama.benchikhi@cern.ch
//

/// \file k892hadronphotonBkg.cxx
/// \brief This is a ask that computes the same-event rotational and the mixed-event combinatorial backgrounds for the K*(892) -> K0S + gamma analysis.
/// \author Oussama Benchikhi

#include "PWGLF/DataModel/LFStrangenessMLTables.h"
#include "PWGLF/DataModel/LFStrangenessPIDTables.h"
Expand Down Expand Up @@ -62,6 +55,13 @@ using std::array;
using dauTracks = soa::Join<aod::DauTrackExtras, aod::DauTrackTPCPIDs>;
using V0StandardDerivedDatas = soa::Join<aod::V0Cores, aod::V0CollRefs, aod::V0Extras, aod::V0LambdaMLScores, aod::V0AntiLambdaMLScores, aod::V0GammaMLScores>;

static const std::vector<std::string> photonSels = {"No Sel", "Mass", "Y", "Neg Eta", "Pos Eta",
"DCAToPV", "DCADau", "Radius", "Z", "CosPA",
"Phi", "Qt", "Alpha", "TPCCR", "TPC NSigma"};
static const std::vector<std::string> kshortSels = {"No Sel", "Mass", "Y", "Neg Eta", "Pos Eta",
"DCAToPV", "Radius", "Z", "DCADau", "Armenteros",
"CosPA", "TPCCR", "ITSNCls", "Lifetime", "TPC NSigma"};

struct k892hadronphotonBkg {
Service<o2::ccdb::BasicCCDBManager> ccdb;
ctpRateFetcher rateFetcher;
Expand Down Expand Up @@ -175,6 +175,7 @@ struct k892hadronphotonBkg {
Configurable<bool> kshortRejectPosITSafterburner{"kshortRejectPosITSafterburner", false, "reject positive track formed out of afterburner ITS tracks"};
Configurable<bool> kshortRejectNegITSafterburner{"kshortRejectNegITSafterburner", false, "reject negative track formed out of afterburner ITS tracks"};
Configurable<float> kshortArmenterosCoefficient{"kshortArmenterosCoefficient", 0.2, "Armenteros-Podolanski coefficient to reject lambdas"};
Configurable<float> kshortMaxTPCNSigmas{"kshortMaxTPCNSigmas", 1e+9, "Max |TPC NSigma| (pion hypothesis) for K0S daughters"};
} kshortSelections;

struct : ConfigurableGroup {
Expand All @@ -184,6 +185,7 @@ struct k892hadronphotonBkg {
ConfigurableAxis axisCentrality{"axisCentrality", {VARIABLE_WIDTH, 0.0f, 5.0f, 10.0f, 20.0f, 30.0f, 40.0f, 50.0f, 60.0f, 70.0f, 80.0f, 90.0f, 100.0f, 110.0f}, "Centrality"};
ConfigurableAxis axisKStarMass{"axisKStarMass", {500, 0.6f, 1.6f}, "M_{K^{*}} (GeV/c^{2})"};
ConfigurableAxis axisIRBinning{"axisIRBinning", {151, -10, 1500}, "Binning for the interaction rate (kHz)"};
ConfigurableAxis axisCandSel{"axisCandSel", {15, 0.5f, +15.5f}, "Candidate Selection"};
} axisConfig;

void init(InitContext const&)
Expand Down Expand Up @@ -230,6 +232,15 @@ struct k892hadronphotonBkg {
}
}

// Single-particle selection
histos.add("PhotonSel/hSelectionStatistics", "hSelectionStatistics", kTH1D, {axisConfig.axisCandSel});
for (size_t i = 0; i < photonSels.size(); ++i)
histos.get<TH1>(HIST("PhotonSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(i + 1, photonSels[i].c_str());

histos.add("KShortSel/hSelectionStatistics", "hSelectionStatistics", kTH1D, {axisConfig.axisCandSel});
for (size_t i = 0; i < kshortSels.size(); ++i)
histos.get<TH1>(HIST("KShortSel/hSelectionStatistics"))->GetXaxis()->SetBinLabel(i + 1, kshortSels[i].c_str());

if (kstarBkgConfig.doSameEvtRotation || kstarBkgConfig.doEvtMixing) {
histos.add("KStarBkg/hDeltaCollision", "hDeltaCollision", kTH1D, {{2000, -1000.f, 1000.f}});
histos.add("KStarBkg/h2dCentralityCollPair", "h2dCentralityCollPair", kTH2D, {axisConfig.axisCentrality, axisConfig.axisCentrality});
Expand Down Expand Up @@ -385,7 +396,7 @@ struct k892hadronphotonBkg {
}

//_______________________________________________
// Process v0 photon candidate (data only, no QA fills)
// Process v0 photon candidate
template <typename TV0Object>
bool processPhotonCandidate(TV0Object const& gamma)
{
Expand All @@ -402,61 +413,77 @@ struct k892hadronphotonBkg {
} else {
// Standard selection
// Gamma basic selection criteria:
histos.fill(HIST("PhotonSel/hSelectionStatistics"), 1.);
if ((gamma.mGamma() < 0) || (gamma.mGamma() > photonSelections.photonMaxMass))
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 2.);
if ((photonY < photonSelections.photonMinRapidity) || (photonY > photonSelections.photonMaxRapidity))
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 3.);
if (gamma.negativeeta() < photonSelections.photonDauEtaMin || gamma.negativeeta() > photonSelections.photonDauEtaMax)
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 4.);
if (gamma.positiveeta() < photonSelections.photonDauEtaMin || gamma.positiveeta() > photonSelections.photonDauEtaMax)
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 5.);
if ((TMath::Abs(gamma.dcapostopv()) < photonSelections.photonMinDCADauToPv) || (TMath::Abs(gamma.dcanegtopv()) < photonSelections.photonMinDCADauToPv))
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 6.);
if (TMath::Abs(gamma.dcaV0daughters()) > photonSelections.photonMaxDCAV0Dau)
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 7.);
if ((gamma.v0radius() < photonSelections.photonMinRadius) || (gamma.v0radius() > photonSelections.photonMaxRadius))
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 8.);
if ((gamma.z() < photonSelections.photonMinZ) || (gamma.z() > photonSelections.photonMaxZ))
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 9.);
if (gamma.v0cosPA() < photonSelections.photonMinV0cospa)
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 10.);
float photonPhi = RecoDecay::phi(gamma.px(), gamma.py());
if ((((photonPhi > photonSelections.photonPhiMin1) && (photonPhi < photonSelections.photonPhiMax1)) || ((photonPhi > photonSelections.photonPhiMin2) && (photonPhi < photonSelections.photonPhiMax2))) && ((photonSelections.photonPhiMin1 != -1) && (photonSelections.photonPhiMax1 != -1) && (photonSelections.photonPhiMin2 != -1) && (photonSelections.photonPhiMax2 != -1)))
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 11.);
if (gamma.qtarm() > photonSelections.photonMaxQt)
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 12.);
if (TMath::Abs(gamma.alpha()) > photonSelections.photonMaxAlpha)
return false;

auto posTrackGamma = gamma.template posTrackExtra_as<dauTracks>();
auto negTrackGamma = gamma.template negTrackExtra_as<dauTracks>();

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 13.);
if ((posTrackGamma.tpcCrossedRows() < photonSelections.photonMinTPCCrossedRows) || (negTrackGamma.tpcCrossedRows() < photonSelections.photonMinTPCCrossedRows))
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 14.);
if (((posTrackGamma.tpcNSigmaEl() < photonSelections.photonMinTPCNSigmas) || (posTrackGamma.tpcNSigmaEl() > photonSelections.photonMaxTPCNSigmas)))
return false;

if (((negTrackGamma.tpcNSigmaEl() < photonSelections.photonMinTPCNSigmas) || (negTrackGamma.tpcNSigmaEl() > photonSelections.photonMaxTPCNSigmas)))
return false;

histos.fill(HIST("PhotonSel/hSelectionStatistics"), 15.);
}

return true;
}

//_______________________________________________
// Process K0Short candidate (data only, no QA fills)
// Process K0Short candidate
template <typename TV0Object, typename TCollision>
bool processKShortCandidate(TV0Object const& kshort, TCollision const& collision)
{
Expand All @@ -470,54 +497,75 @@ struct k892hadronphotonBkg {

} else {
// KShort basic selection criteria:
histos.fill(HIST("KShortSel/hSelectionStatistics"), 1.);
if ((TMath::Abs(kshort.mK0Short() - o2::constants::physics::MassK0Short) > kshortSelections.kshortWindow) && kshortSelections.kshortWindow > 0)
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 2.);
if ((kshort.yK0Short() < kshortSelections.kshortMinRapidity) || (kshort.yK0Short() > kshortSelections.kshortMaxRapidity))
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 3.);
if ((kshort.negativeeta() < kshortSelections.kshortDauEtaMin) || (kshort.negativeeta() > kshortSelections.kshortDauEtaMax))
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 4.);
if ((kshort.positiveeta() < kshortSelections.kshortDauEtaMin) || (kshort.positiveeta() > kshortSelections.kshortDauEtaMax))
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 5.);
if ((TMath::Abs(kshort.dcapostopv()) < kshortSelections.kshortMinDCAPosToPv) || (TMath::Abs(kshort.dcanegtopv()) < kshortSelections.kshortMinDCANegToPv))
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 6.);
if ((kshort.v0radius() < kshortSelections.kshortMinv0radius) || (kshort.v0radius() > kshortSelections.kshortMaxv0radius))
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 7.);
if ((kshort.z() < kshortSelections.kshortMinZ) || (kshort.z() > kshortSelections.kshortMaxZ))
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 8.);
if (TMath::Abs(kshort.dcaV0daughters()) > kshortSelections.kshortMaxDCAV0Dau)
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 9.);
if (kshort.qtarm() < kshortSelections.kshortArmenterosCoefficient * TMath::Abs(kshort.alpha()))
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 10.);
if (kshort.v0cosPA() < kshortSelections.kshortMinv0cospa)
return false;

auto posTrackKShort = kshort.template posTrackExtra_as<dauTracks>();
auto negTrackKShort = kshort.template negTrackExtra_as<dauTracks>();

histos.fill(HIST("KShortSel/hSelectionStatistics"), 11.);
if ((posTrackKShort.tpcCrossedRows() < kshortSelections.kshortMinTPCCrossedRows) || (negTrackKShort.tpcCrossedRows() < kshortSelections.kshortMinTPCCrossedRows))
return false;

// MinITSCls
bool posIsFromAfterburner = posTrackKShort.itsChi2PerNcl() < 0;
bool negIsFromAfterburner = negTrackKShort.itsChi2PerNcl() < 0;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 12.);
if (posTrackKShort.itsNCls() < kshortSelections.kshortMinITSclusters && (!kshortSelections.kshortRejectPosITSafterburner || posIsFromAfterburner))
return false;
if (negTrackKShort.itsNCls() < kshortSelections.kshortMinITSclusters && (!kshortSelections.kshortRejectNegITSafterburner || negIsFromAfterburner))
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 13.);
float fKShortLifeTime = kshort.distovertotmom(collision.posX(), collision.posY(), collision.posZ()) * o2::constants::physics::MassK0Short;
if (fKShortLifeTime > kshortSelections.kshortMaxLifeTime)
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 14.);
// TPC PID selection on the K0S pion daughters (same convention as posTrackKShort.tpcNSigmaPi())
if (((TMath::Abs(posTrackKShort.tpcNSigmaPi()) > kshortSelections.kshortMaxTPCNSigmas) ||
(TMath::Abs(negTrackKShort.tpcNSigmaPi()) > kshortSelections.kshortMaxTPCNSigmas)))
return false;

histos.fill(HIST("KShortSel/hSelectionStatistics"), 15.);
}
return true;
}
Expand Down
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