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[PWGCF] Adding process function to filter Phi and V0s simultaneously #12072

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Merged
otonvd merged 4 commits into from
Jul 17, 2025
Merged

[PWGCF] Adding process function to filter Phi and V0s simultaneously #12072

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af96e5e
PWGCF: Adding process function to filter Phi and V0s simultaneously
stefanopolitano Jul 15, 2025
4371525
Please consider the following formatting changes
alibuild Jul 15, 2025
53a0630
Merge pull request #20 from alibuild/alibot-cleanup-12072
stefanopolitano Jul 15, 2025
20accb7
Ading missing cut on cfcollisions
stefanopolitano Jul 16, 2025
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102 changes: 102 additions & 0 deletions PWGCF/TableProducer/filter2Prong.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -257,7 +257,7 @@
pz2 = candidate2.pz();
p1 = candidate1.p();
p2 = candidate2.p();
angle = TMath::ACos((pt1 * pt2 + pz1 * pz2) / (p1 * p2));

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if (grpPhi.isDeepAngle && angle < grpPhi.deepAngle) {
return false;
}
Expand All @@ -269,7 +269,7 @@
{
const auto pglobal = track.p();
const auto ptpc = track.tpcInnerParam();
if (TMath::Abs(pglobal - ptpc) > grpPhi.confFakeKaonCut) {

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return true;
}
return false;
Expand Down Expand Up @@ -304,7 +304,7 @@
if (((std::abs(posTrack.tpcNSigmaPi()) > grpV0.daughPIDCuts) || (std::abs(negTrack.tpcNSigmaPi()) > grpV0.daughPIDCuts))) {
return false;
}
if ((TMath::Abs(v0.dcapostopv()) < grpV0.minV0DCAPiK0s || TMath::Abs(v0.dcanegtopv()) < grpV0.minV0DCAPiK0s)) {

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return false;
}
return true;
Expand All @@ -331,10 +331,10 @@
if (v0.dcaV0daughters() > grpV0.dcaV0DaughtersMaxLambda) {
return false;
}
if (pid == LambdaPid::kLambda && (TMath::Abs(v0.dcapostopv()) < grpV0.minV0DCAPr || TMath::Abs(v0.dcanegtopv()) < grpV0.minV0DCAPiLambda)) {

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return false;
}
if (pid == LambdaPid::kAntiLambda && (TMath::Abs(v0.dcapostopv()) < grpV0.minV0DCAPiLambda || TMath::Abs(v0.dcanegtopv()) < grpV0.minV0DCAPr)) {

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return false;
}
if (pid == LambdaPid::kLambda && ((std::abs(posTrack.tpcNSigmaPr()) > grpV0.daughPIDCuts) || (std::abs(negTrack.tpcNSigmaPi()) > grpV0.daughPIDCuts))) {
Expand Down Expand Up @@ -378,18 +378,18 @@
{
if (cfgMomDepPID) {
if (candidate.p() < 0.5) {
if (!candidate.hasTOF() && TMath::Abs(candidate.tpcNSigmaKa()) < grpPhi.nsigmaCutTPC) {

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return true;
} else if (candidate.hasTOF() && TMath::Sqrt(candidate.tpcNSigmaKa() * candidate.tpcNSigmaKa() + candidate.tofNSigmaKa() * candidate.tofNSigmaKa()) < grpPhi.nsigmaCutTOF && candidate.beta() > grpPhi.cutTOFBeta) {

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return true;
}
} else if (candidate.hasTOF() && TMath::Sqrt(candidate.tpcNSigmaKa() * candidate.tpcNSigmaKa() + candidate.tofNSigmaKa() * candidate.tofNSigmaKa()) < grpPhi.nsigmaCutTOF && candidate.beta() > grpPhi.cutTOFBeta) {

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return true;
}
} else {
if (!candidate.hasTOF() && TMath::Abs(candidate.tpcNSigmaKa()) < grpPhi.nsigmaCutTPC) {

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return true;
} else if (candidate.hasTOF() && TMath::Sqrt(candidate.tpcNSigmaKa() * candidate.tpcNSigmaKa() + candidate.tofNSigmaKa() * candidate.tofNSigmaKa()) < grpPhi.nsigmaCutTOF && candidate.beta() > grpPhi.cutTOFBeta) {

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}
}
Expand Down Expand Up @@ -437,6 +437,108 @@
}
PROCESS_SWITCH(Filter2Prong, processDataInvMass, "Process data generic 2-prong candidates with invariant mass method", false);

// Phi and V0s invariant mass method candidate finder. Only works for non-identical daughters of opposite charge for now.
void processDataPhiV0(aod::Collisions::iterator const& collision, aod::BCsWithTimestamps const&, aod::CFCollRefs const& cfcollisions, aod::CFTrackRefs const& cftracks, Filter2Prong::PIDTrack const& tracks, aod::V0Datas const& V0s)
{
if (cfcollisions.size() <= 0)
return; // rejected collision

// V0
for (const auto& v0 : V0s) { // Loop over V0 candidates
if (!isV0TrackSelected(v0)) { // Quality selection for V0 prongs
continue;
}

const auto& posTrack = v0.template posTrack_as<PIDTrack>();
const auto& negTrack = v0.template negTrack_as<PIDTrack>();
double massV0 = 0.0;

// K0s
if (isSelectedV0AsK0s(collision, v0)) { // candidate is K0s
output2ProngTracks(cfcollisions.begin().globalIndex(),
posTrack.globalIndex(), negTrack.globalIndex(),
v0.pt(), v0.eta(), v0.phi(), v0.mK0Short(), aod::cf2prongtrack::K0stoPiPi);
}

// Lambda and Anti-Lambda
bool LambdaTag = isSelectedV0AsLambda<LambdaPid::kLambda>(collision, v0);
bool aLambdaTag = isSelectedV0AsLambda<LambdaPid::kAntiLambda>(collision, v0);

// Note: candidate compatible with Lambda and Anti-Lambda hypothesis are counted twice (once for each hypothesis)
if (LambdaTag) { // candidate is Lambda
massV0 = v0.mLambda();
output2ProngTracks(cfcollisions.begin().globalIndex(), posTrack.globalIndex(), negTrack.globalIndex(),
v0.pt(), v0.eta(), v0.phi(), massV0, aod::cf2prongtrack::LambdatoPPi);
}
if (aLambdaTag) { // candidate is Anti-lambda
massV0 = v0.mAntiLambda();
output2ProngTracks(cfcollisions.begin().globalIndex(), posTrack.globalIndex(), negTrack.globalIndex(),
v0.pt(), v0.eta(), v0.phi(), massV0, aod::cf2prongtrack::AntiLambdatoPiP);
} // end of Lambda and Anti-Lambda processing
} // end of loop over V0 candidates

// Phi
if (cftracks.size() <= 0)
return; // rejected collision

o2::aod::ITSResponse itsResponse;

for (const auto& cftrack1 : cftracks) { // Loop over first track
const auto& p1 = tracks.iteratorAt(cftrack1.trackId() - tracks.begin().globalIndex());
if (p1.sign() != 1) {
continue;
}
if (!selectionTrack(p1)) {
continue;
}
if (grpPhi.ITSPIDSelection && p1.p() < grpPhi.ITSPIDPthreshold.value && !(itsResponse.nSigmaITS<o2::track::PID::Kaon>(p1) > grpPhi.lowITSPIDNsigma.value && itsResponse.nSigmaITS<o2::track::PID::Kaon>(p1) < grpPhi.highITSPIDNsigma.value)) { // Check ITS PID condition
continue;
}
if (!selectionPID(p1)) {
continue;
}
if (grpPhi.removefaketrack && isFakeTrack(p1)) { // Check if the track is a fake kaon
continue;
}

for (const auto& cftrack2 : cftracks) { // Loop over second track
if (cftrack2.globalIndex() == cftrack1.globalIndex()) // Skip if it's the same track as the first one
continue;

const auto& p2 = tracks.iteratorAt(cftrack2.trackId() - tracks.begin().globalIndex());
if (p2.sign() != -1) {
continue;
}
if (!selectionTrack(p2)) {
continue;
}
if (!selectionPID(p2)) {
continue;
}
if (grpPhi.ITSPIDSelection && p2.p() < grpPhi.ITSPIDPthreshold.value && !(itsResponse.nSigmaITS<o2::track::PID::Kaon>(p2) > grpPhi.lowITSPIDNsigma.value && itsResponse.nSigmaITS<o2::track::PID::Kaon>(p2) < grpPhi.highITSPIDNsigma.value)) { // Check ITS PID condition
continue;
}
if (grpPhi.removefaketrack && isFakeTrack(p2)) { // Check if the track is a fake kaon
continue;
}
if (!selectionPair(p1, p2)) {
continue;
}

ROOT::Math::PtEtaPhiMVector vec1(p1.pt(), p1.eta(), p1.phi(), cfgImPart1Mass);
ROOT::Math::PtEtaPhiMVector vec2(p2.pt(), p2.eta(), p2.phi(), cfgImPart2Mass);
ROOT::Math::PtEtaPhiMVector s = vec1 + vec2;
if (s.M() < grpPhi.ImMinInvMassPhiMeson || s.M() > grpPhi.ImMaxInvMassPhiMeson) {
continue;
}
float phi = RecoDecay::constrainAngle(s.Phi(), 0.0f);
output2ProngTracks(cfcollisions.begin().globalIndex(),
cftrack1.globalIndex(), cftrack2.globalIndex(), s.pt(), s.eta(), phi, s.M(), aod::cf2prongtrack::PhiToKK);
} // end of loop over second track
} // end of loop over first track
}
PROCESS_SWITCH(Filter2Prong, processDataPhiV0, "Process data Phi and V0 candidates with invariant mass method", false);

// Phi and V0s invariant mass method candidate finder. Only works for non-identical daughters of opposite charge for now.
void processDataV0(aod::Collisions::iterator const& collision, aod::BCsWithTimestamps const&, aod::CFCollRefs const& cfcollisions, aod::CFTrackRefs const& cftracks, Filter2Prong::PIDTrack const&, aod::V0Datas const& V0s)
{
Expand Down
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