Skip to content

[ALICE3] Strangeness finder: gen daughter particle histograms #18622

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
njacazio merged 2 commits into from
Nov 6, 2026
+78 −28
Merged

[ALICE3] Strangeness finder: gen daughter particle histograms #18622

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
bc4957c
adjustments for gen daughter particle histograms
Nov 6, 2026
8124865
clang format
Nov 6, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 0 additions & 1 deletion ALICE3/TableProducer/alice3TrackingTranslator.cxx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,6 @@
#include <TCollection.h>
#include <TFile.h>
#include <TH1.h>
#include <TH2.h>
#include <TList.h>
#include <TString.h>
#include <TSystem.h>
Expand Down
105 changes: 78 additions & 27 deletions ALICE3/TableProducer/alice3strangenessFinder.cxx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -280,9 +280,17 @@ struct Alice3strangenessFinder {
hPtRes1DPosDau->GetXaxis()->SetTitle("(p_{T}^{gen} - p_{T}^{reco})/p_{T}^{gen}");

auto hV0Building = histos.add<TH1>("hV0Building", "hV0Building", kTH1D, {{10, 0.5, 10.5}});
hV0Building->GetXaxis()->SetBinLabel(1, "Pair");
hV0Building->GetXaxis()->SetBinLabel(2, "Pdg check");
hV0Building->GetXaxis()->SetBinLabel(3, "DCA Fitter");
if (doprocessFindV0CandidateOTF || doprocessFindV0CandidateACTS) {
hV0Building->GetXaxis()->SetBinLabel(1, "Pair");
hV0Building->GetXaxis()->SetBinLabel(2, "Pdg check");
hV0Building->GetXaxis()->SetBinLabel(3, "DCA Fitter");
}
if (doprocessMCTrueFromACTS) {
hV0Building->GetXaxis()->SetBinLabel(1, "Pair");
hV0Building->GetXaxis()->SetBinLabel(2, "PID");
hV0Building->GetXaxis()->SetBinLabel(3, "Mother Check");
hV0Building->GetXaxis()->SetBinLabel(4, "DCA Fitter");
}

auto hCascadeBuilding = histos.add<TH1>("hCascadeBuilding", "hCascadeBuilding", kTH1D, {{10, 0.5, 10.5}});
hCascadeBuilding->GetXaxis()->SetBinLabel(1, "Attempts");
Expand Down Expand Up @@ -394,14 +402,17 @@ struct Alice3strangenessFinder {
return returnValue;
}
template <typename TMCParticle>
bool checkSameMotherGen(TMCParticle const& mcParticle1, TMCParticle const& mcParticle2)
bool checkSameMotherGen(TMCParticle const& mcParticle1, TMCParticle const& mcParticle2, Alice3MCParticles const& mcParticles)
{
bool returnValue = false;
if (mcParticle1.has_mothers() && mcParticle2.has_mothers()) {
auto motherIds1 = mcParticle1.mothersIds();
auto motherIds2 = mcParticle2.mothersIds();
if (!motherIds1.empty() && !motherIds2.empty() && motherIds1[0] == motherIds2[0]) {
returnValue = true;
auto mother = mcParticles.rawIteratorAt(motherIds1[0] - mcParticles.rawIteratorAt(0).globalIndex());
if (mother.isPhysicalPrimary()) {
returnValue = true;
}
}
} // end association check
return returnValue;
Expand Down Expand Up @@ -778,7 +789,7 @@ struct Alice3strangenessFinder {
} // end posTrack
}

void processMCTrueFromACTS(aod::McCollision const& collision, Alice3MCParticles const&, aod::McParticles const&)
void processMCTrueFromACTS(aod::McCollision const& collision, Alice3MCParticles const& mcParticles)
{

auto negativeMCParticlesGrouped = negativeMCParticles->sliceByCached(aod::mcparticle::mcCollisionId, collision.globalIndex(), cache);
Expand All @@ -791,41 +802,78 @@ struct Alice3strangenessFinder {
bool isLambda = false;
bool isAntiLambda = false;
int iPosPart = 0;
auto posMotherPdgCode = 0;
auto negMotherPdgCode = 0;
for (auto const& posParticle : positiveMCParticlesGrouped) {
radiusPos = std::hypot(posParticle.vx(), posParticle.vy());
histos.fill(HIST("hRadiusVsHitsPos"), radiusPos, posParticle.nHits());
if (posParticle.pdgCode() != kPiPlus && posParticle.pdgCode() != kProton) {
continue;
}

if (posParticle.has_mothers()) {
auto motherIds = posParticle.mothersIds();
if (!motherIds.empty()) {
auto mother = mcParticles.rawIteratorAt(motherIds[0] - mcParticles.rawIteratorAt(0).globalIndex());
if (mother.isPhysicalPrimary()) {
radiusPos = std::hypot(posParticle.vx(), posParticle.vy());
histos.fill(HIST("hRadiusVsHitsPos"), radiusPos, posParticle.nHits());
posMotherPdgCode = mother.pdgCode();
if (posMotherPdgCode == kK0Short) {
histos.fill(HIST("K0Short/hPosDaughterGenPtEta"), posParticle.pt(), posParticle.eta());
}
if (posMotherPdgCode == kLambda0) {
histos.fill(HIST("Lambda/hPosDaughterGenPtEta"), posParticle.pt(), posParticle.eta());
}
if (posMotherPdgCode == kLambda0Bar) {
histos.fill(HIST("AntiLambda/hPosDaughterGenPtEta"), posParticle.pt(), posParticle.eta());
}
}
}
}

for (auto const& negParticle : negativeMCParticlesGrouped) {
if (negParticle.pdgCode() != kPiMinus && negParticle.pdgCode() != kProtonBar) {
continue;
}
radiusNeg = std::hypot(negParticle.vx(), negParticle.vy());
if (iPosPart == 0) {
histos.fill(HIST("hRadiusVsHitsNeg"), radiusNeg, negParticle.nHits());
if (negParticle.has_mothers()) {
auto motherIds = negParticle.mothersIds();
if (!motherIds.empty()) {
auto mother = mcParticles.rawIteratorAt(motherIds[0] - mcParticles.rawIteratorAt(0).globalIndex());
if (mother.isPhysicalPrimary()) {
radiusNeg = std::hypot(negParticle.vx(), negParticle.vy());
histos.fill(HIST("hRadiusVsHitsNeg"), radiusNeg, negParticle.nHits());
negMotherPdgCode = mother.pdgCode();
if (negMotherPdgCode == kK0Short) {
histos.fill(HIST("K0Short/hNegDaughterGenPtEta"), negParticle.pt(), negParticle.eta());
}
if (negMotherPdgCode == kLambda0) {
histos.fill(HIST("Lambda/hNegDaughterGenPtEta"), negParticle.pt(), negParticle.eta());
}
if (negMotherPdgCode == kLambda0Bar) {
histos.fill(HIST("AntiLambda/hNegDaughterGenPtEta"), negParticle.pt(), negParticle.eta());
}
}
}
}
}
if (radiusPos == radiusNeg) {
isK0s = (posParticle.pdgCode() == kPiPlus && negParticle.pdgCode() == kPiMinus);
isLambda = (posParticle.pdgCode() == kProton && negParticle.pdgCode() == kPiMinus);
isAntiLambda = (posParticle.pdgCode() == kPiPlus && negParticle.pdgCode() == kProtonBar);
histos.fill(HIST("hV0Building"), 1.0);
isK0s = (posParticle.pdgCode() == kPiPlus && negParticle.pdgCode() == kPiMinus && posMotherPdgCode == kK0Short && negMotherPdgCode == kK0Short);
isLambda = (posParticle.pdgCode() == kProton && negParticle.pdgCode() == kPiMinus && posMotherPdgCode == kLambda0 && negMotherPdgCode == kLambda0);
isAntiLambda = (posParticle.pdgCode() == kPiPlus && negParticle.pdgCode() == kProtonBar && posMotherPdgCode == kLambda0Bar && negMotherPdgCode == kLambda0Bar);
if (isK0s || isLambda || isAntiLambda) {
if (!isK0s && isK0Gun) {
continue;
}
if (!isLambda && isLambdaGun) {
continue;
}
if (isK0s && checkSameMotherGen(posParticle, negParticle)) {
histos.fill(HIST("K0Short/hPosDaughterGenPtEta"), posParticle.pt(), posParticle.eta());
histos.fill(HIST("K0Short/hNegDaughterGenPtEta"), negParticle.pt(), negParticle.eta());
}
if (isLambda && checkSameMotherGen(posParticle, negParticle)) {
histos.fill(HIST("Lambda/hPosDaughterGenPtEta"), posParticle.pt(), posParticle.eta());
histos.fill(HIST("Lambda/hNegDaughterGenPtEta"), negParticle.pt(), negParticle.eta());
}
if (isAntiLambda && checkSameMotherGen(posParticle, negParticle)) {
histos.fill(HIST("AntiLambda/hPosDaughterGenPtEta"), posParticle.pt(), posParticle.eta());
histos.fill(HIST("AntiLambda/hNegDaughterGenPtEta"), negParticle.pt(), negParticle.eta());
histos.fill(HIST("hV0Building"), 2.0);
if (mcSameMotherCheck && !checkSameMotherGen(posParticle, negParticle, mcParticles)) {
continue;
}

histos.fill(HIST("hV0Building"), 3.0);
Candidate v0cand;
std::vector<double> v0DecayVertex;
v0DecayVertex.push_back(negParticle.vx());
Expand All @@ -840,6 +888,7 @@ struct Alice3strangenessFinder {
if (!buildDecayCandidateTwoBody(posParCov, negParCov, vtx, v0cand)) {
continue;
}
histos.fill(HIST("hV0Building"), 4.0);
v0CandidateIndices(collision.globalIndex(),
posParticle.globalIndex(),
negParticle.globalIndex(),
Expand All @@ -860,8 +909,10 @@ struct Alice3strangenessFinder {
}
}
}
negMotherPdgCode = 0;
}
iPosPart++;
posMotherPdgCode = 0;
}
}
template <typename TTracksGrouped>
Expand All @@ -880,7 +931,7 @@ struct Alice3strangenessFinder {
auto mcParticle = track.template mcParticle_as<aod::McParticles>();
if (mcParticle.has_mothers()) {
for (const auto& m1 : mcParticle.template mothers_as<aod::McParticles>()) {
if (daughEff.analyseK0Daughters && m1.pdgCode() == kK0Short) {
if (daughEff.analyseK0Daughters && m1.pdgCode() == kK0Short && m1.isPhysicalPrimary()) {
if (daughterType == 0 && mcParticle.pdgCode() == kPiMinus) {
histos.fill(HIST("K0Short/hNegDaughterRecoTruePtEta"), mcParticle.pt(), mcParticle.eta());
histos.fill(HIST("K0Short/hNegDaughterRecoPtEta"), pt, eta);
Expand All @@ -894,7 +945,7 @@ struct Alice3strangenessFinder {
histos.fill(HIST("hPtRes1DPosDau"), (mcParticle.pt() - pt) / mcParticle.pt());
}
}
if (daughEff.analyseLambdaDaughters && m1.pdgCode() == kLambda0) {
if (daughEff.analyseLambdaDaughters && m1.pdgCode() == kLambda0 && m1.isPhysicalPrimary()) {
if (daughterType == 0 && mcParticle.pdgCode() == kPiMinus) {
histos.fill(HIST("Lambda/hNegDaughterRecoTruePtEta"), mcParticle.pt(), mcParticle.eta());
histos.fill(HIST("Lambda/hNegDaughterRecoPtEta"), pt, eta);
Expand All @@ -908,7 +959,7 @@ struct Alice3strangenessFinder {
histos.fill(HIST("hPtRes1DPosDau"), (mcParticle.pt() - pt) / mcParticle.pt());
}
}
if (daughEff.analyseAntiLambdaDaughters && m1.pdgCode() == kLambda0Bar) {
if (daughEff.analyseAntiLambdaDaughters && m1.pdgCode() == kLambda0Bar && m1.isPhysicalPrimary()) {
if (daughterType == 0 && mcParticle.pdgCode() == kProtonBar) {
histos.fill(HIST("AntiLambda/hNegDaughterRecoTruePtEta"), mcParticle.pt(), mcParticle.eta());
histos.fill(HIST("AntiLambda/hNegDaughterRecoPtEta"), pt, eta);
Expand Down
Loading