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Merged
dsekihat merged 1 commit into from
Jun 16, 2026
+144 −40
Merged

[PWGEM/Dilepton] update createTPP #16692

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5 changes: 0 additions & 5 deletions PWGEM/Dilepton/Core/Dilepton.h
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Original file line number Diff line number Diff line change
Expand Up @@ -94,11 +94,6 @@
using FilteredMyElectrons = o2::soa::Filtered<MyElectrons>;
using FilteredMyElectron = FilteredMyElectrons::iterator;

using MyElectronsSCT = o2::soa::Join<o2::aod::EMPrimaryElectrons, o2::aod::EMPrimaryElectronEMEventIds, o2::aod::EMAmbiguousElectronSelfIds, o2::aod::EMPrimaryElectronsPrefilterBit, o2::aod::EMPrimaryElectronsPrefilterBitDerived, o2::aod::EMPrimaryElectronsBDTSCT>;
using MyElectronSCT = MyElectronsSCT::iterator;
using FilteredMyElectronsSCT = o2::soa::Filtered<MyElectronsSCT>;
using FilteredMyElectronSCT = FilteredMyElectronsSCT::iterator;

using MyMuons = o2::soa::Join<o2::aod::EMPrimaryMuons, o2::aod::EMPrimaryMuonEMEventIds, o2::aod::EMAmbiguousMuonSelfIds, o2::aod::EMGlobalMuonSelfIds, o2::aod::EMPrimaryMuonsPrefilterBitDerived>;
using MyMuon = MyMuons::iterator;
using FilteredMyMuons = o2::soa::Filtered<MyMuons>;
Expand Down Expand Up @@ -491,10 +486,10 @@
}

// In case override, don't proceed, please - no CCDB access required
if (d_bz_input > -990) {

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[magic-number] 

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d_bz = d_bz_input;
o2::parameters::GRPMagField grpmag;
if (std::fabs(d_bz) > 1e-5) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
grpmag.setL3Current(30000.f / (d_bz / 5.0f));
}
o2::base::Propagator::initFieldFromGRP(&grpmag);
Expand Down Expand Up @@ -592,7 +587,7 @@
pair_dca_axis_title = "DCA_{ee}^{3D} (#sigma)";
if (cfgDCAType == 1) {
pair_dca_axis_title = "DCA_{ee}^{XY} (#sigma)";
} else if (cfgDCAType == 2) {

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[magic-number] 

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pair_dca_axis_title = "DCA_{ee}^{Z} (#sigma)";
}
if (cfgUseSignedDCA) {
Expand Down Expand Up @@ -719,9 +714,9 @@
}

// event info
if (nmod == 2) {

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[magic-number] 

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o2::aod::pwgem::dilepton::utils::eventhistogram::addEventHistograms<2>(&fRegistry);
} else if (nmod == 3) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
o2::aod::pwgem::dilepton::utils::eventhistogram::addEventHistograms<3>(&fRegistry);
} else {
o2::aod::pwgem::dilepton::utils::eventhistogram::addEventHistograms<-1>(&fRegistry);
Expand Down Expand Up @@ -838,7 +833,7 @@
fDimuonCut.SetMatchingChi2MCHMID(0.f, dimuoncuts.cfg_max_matching_chi2_mchmid);
fDimuonCut.SetDCAxy(0.f, dimuoncuts.cfg_max_dcaxy);
fDimuonCut.SetRabs(dimuoncuts.cfg_min_rabs, dimuoncuts.cfg_max_rabs);
fDimuonCut.SetMaxPDCARabsDep([&](float rabs) { return (rabs < 26.5 ? 594.f : 324.f); });

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[magic-number] 

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fDimuonCut.SetMaxdPtdEtadPhiwrtMCHMID(dimuoncuts.cfg_max_relDPt_wrt_matchedMCHMID, dimuoncuts.cfg_max_DEta_wrt_matchedMCHMID, dimuoncuts.cfg_max_DPhi_wrt_matchedMCHMID); // this is relevant for global muons
fDimuonCut.SetMFTHitMap(dimuoncuts.requireMFTHitMap, dimuoncuts.requiredMFTDisks);
fDimuonCut.EnableTTCA(dimuoncuts.enableTTCA);
Expand All @@ -849,7 +844,7 @@
{
bool is_good = true;
for (const auto& qn : qvectors[nmod]) {
if (std::fabs(qn[0]) > 20.f || std::fabs(qn[1]) > 20.f) {

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is_good = false;
break;
}
Expand Down Expand Up @@ -948,7 +943,7 @@
} else {
pair_dca = o2::aod::pwgem::dilepton::utils::pairutil::pairDCAQuadSum(o2::aod::pwgem::dilepton::utils::emtrackutil::dcaXYinSigma(t1), o2::aod::pwgem::dilepton::utils::emtrackutil::dcaXYinSigma(t2));
}
} else if (cfgDCAType == 2) {

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[magic-number] 

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if (cfgUseSignedDCA) {
pair_dca = o2::aod::pwgem::dilepton::utils::pairutil::pairDCASignQuadSum(o2::aod::pwgem::dilepton::utils::emtrackutil::dcaZinSigma(t1), o2::aod::pwgem::dilepton::utils::emtrackutil::dcaZinSigma(t2), t1.sign(), t2.sign());
} else {
Expand All @@ -975,7 +970,7 @@
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("uls/hMvsOpAng"), opAng, v12.M(), weight);
if (cfgDCAType == 1) {
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("uls/hDCA1vsDCA2"), o2::aod::pwgem::dilepton::utils::emtrackutil::dcaXYinSigma(t1), o2::aod::pwgem::dilepton::utils::emtrackutil::dcaXYinSigma(t2), weight);
} else if (cfgDCAType == 2) {

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fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("uls/hDCA1vsDCA2"), o2::aod::pwgem::dilepton::utils::emtrackutil::dcaZinSigma(t1), o2::aod::pwgem::dilepton::utils::emtrackutil::dcaZinSigma(t2), weight);
}
}
Expand All @@ -987,7 +982,7 @@
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lspp/hMvsOpAng"), opAng, v12.M(), weight);
if (cfgDCAType == 1) {
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lspp/hDCA1vsDCA2"), o2::aod::pwgem::dilepton::utils::emtrackutil::dcaXYinSigma(t1), o2::aod::pwgem::dilepton::utils::emtrackutil::dcaXYinSigma(t2), weight);
} else if (cfgDCAType == 2) {

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[magic-number] 

Avoid magic numbers in expressions. Assign the value to a clearly named variable or constant.
fRegistry.fill(HIST("Pair/") + HIST(event_pair_types[ev_id]) + HIST("lspp/hDCA1vsDCA2"), o2::aod::pwgem::dilepton::utils::emtrackutil::dcaZinSigma(t1), o2::aod::pwgem::dilepton::utils::emtrackutil::dcaZinSigma(t2), weight);
}
}
Expand Down
179 changes: 144 additions & 35 deletions PWGEM/Dilepton/Tasks/createTTP.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -87,6 +87,9 @@ struct createTTP {
ConfigurableAxis ConfDCABins{"ConfDCABins", {200, -1000, +1000}, "DCA bins for output histograms"};
ConfigurableAxis ConfDCASigmaBins{"ConfDCASigmaBins", {200, -10, +10}, "DCA in sigma bins for output histograms"};

o2::framework::ConfigurableAxis ConfMllBins{"ConfMllBins", {400, 0, 4}, "mll bins for output histograms"};
o2::framework::ConfigurableAxis ConfPtllBins{"ConfPtllBins", {o2::framework::VARIABLE_WIDTH, 0.00, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, 2.50, 3.00, 3.50, 4.00, 4.50, 5.00, 6.00, 7.00, 8.00, 9.00, 10.00}, "pTll bins for output histograms"};

struct : ConfigurableGroup {
std::string prefix = "eventCut";
Configurable<float> cfgZvtxMin{"cfgZvtxMin", -10, "min. Zvtx"};
Expand Down Expand Up @@ -165,12 +168,17 @@ struct createTTP {

struct : ConfigurableGroup {
std::string prefix = "pairCut";
Configurable<float> minMee{"minMee", 0.00, "min mee for pi0 -> ee"};
Configurable<float> maxMee{"maxMee", 0.01, "max mee for pi0 -> ee"};
Configurable<float> minPhiV{"minPhiV", 0.f, "min phiv for pi0 -> ee"};
Configurable<float> maxPhiV{"maxPhiV", M_PI / 2, "max phiv for pi0 -> ee"};
Configurable<float> minMee{"minMee", 0.00, "min mee of pi0 -> ee"};
Configurable<float> maxMee{"maxMee", 0.01, "max mee of pi0 -> ee"};
Configurable<float> minPhiV{"minPhiV", 0.f, "min phiv of pi0 -> ee"};
Configurable<float> maxPhiV{"maxPhiV", M_PI / 2, "max phiv of pi0 -> ee"};
} pairCut;

struct : ConfigurableGroup {
std::string prefix = "pfGroup";
Configurable<float> maxMee{"maxMee", 0.06, "max mee of pi0 -> ee for prefilter to improve S/B for peak extraction of VMs"};
} pfGroup;

o2::aod::rctsel::RCTFlagsChecker rctChecker;

int mRunNumber{0};
Expand Down Expand Up @@ -247,17 +255,20 @@ struct createTTP {
const AxisSpec axis_eta{cfgNbinsEta, -1, +1, "#eta"};
const AxisSpec axis_phi{cfgNbinsPhi, 0.0, 2 * M_PI, "#varphi (rad.)"};
const AxisSpec axis_sign{3, -1.5, +1.5, "sign"};
const AxisSpec axis_mass{400, 0, 4, "m_{ee} (GeV/c^{2})"};
const AxisSpec axis_ptee{100, 0, 10, "p_{T,ee} (GeV/c)"};
const AxisSpec axis_mass{ConfMllBins, "m_{ee} (GeV/c^{2})"};
const AxisSpec axis_ptee{ConfPtllBins, "p_{T,ee} (GeV/c)"};

const AxisSpec axis_mean_dcaXY{ConfDCABins, "DCA_{xy} (#mum)"};
const AxisSpec axis_mean_dcaZ{ConfDCABins, "DCA_{z} (#mum)"};
const AxisSpec axis_pull_dcaXY{ConfDCASigmaBins, "DCA_{xy}/#sigma_{xy}^{DCA}"};
const AxisSpec axis_pull_dcaZ{ConfDCASigmaBins, "DCA_{z}/#sigma_{z}^{DCA}"};

fRegistry.add("Track/hs", "electron", kTHnSparseD, {axis_pt, axis_eta, axis_phi, axis_sign, axis_mean_dcaXY, axis_mean_dcaZ, axis_pull_dcaXY, axis_pull_dcaZ}, false);
fRegistry.add("Track/hs", "probe electron", kTHnSparseD, {axis_pt, axis_eta, axis_phi, axis_sign, axis_mean_dcaXY, axis_mean_dcaZ, axis_pull_dcaXY, axis_pull_dcaZ}, false);
fRegistry.add("Track/hTPCNsigmaEl", "TPC n sigma el;p_{in} (GeV/c);n #sigma_{e}^{TPC}", kTH2F, {{1000, 0, 10}, {100, -5.f, +5.f}}, false);
fRegistry.add("Pair/hMvsPhiV", "m_{ee} vs. #varphi_{V} ULS;#varphi_{V} (rad.);m_{ee} (GeV/c^{2})", kTH2F, {{90, 0.f, M_PI}, {100, 0, 0.1}});
fRegistry.add("Pair/uls/hMvsPt", "dielectron", kTH2D, {axis_mass, axis_ptee}, false);
fRegistry.addClone("Pair/uls/", "Pair/lspp/");
fRegistry.addClone("Pair/uls/", "Pair/lsmm/");
fRegistry.add("TAP/hMvsPhiV", "m_{ee} vs. #varphi_{V} ULS;#varphi_{V} (rad.);m_{ee} (GeV/c^{2})", kTH2F, {{90, 0.f, M_PI}, {100, 0, 0.1}});

if (doprocessMC) {
fRegistry.add("Pair/hMvsPt_omega", "#omega->ee", kTH2D, {axis_mass, axis_ptee}, false);
Expand All @@ -273,10 +284,6 @@ struct createTTP {
return false;
}

if (!isTagElectron(track)) {
return false;
}

if (pt < tagCut.min_pt_track || tagCut.max_pt_track < pt) {
return false;
}
Expand Down Expand Up @@ -333,10 +340,6 @@ struct createTTP {
return false;
}

if (!isProbeElectron(track)) {
return false;
}

if (pt < probeCut.min_pt_track || probeCut.max_pt_track < pt) {
return false;
}
Expand Down Expand Up @@ -464,13 +467,19 @@ struct createTTP {
}
}

using MyBCs = soa::Join<aod::BCsWithTimestamps, aod::BcSels>;
struct lepton {
float pt{0};
float eta{0};
float phi{0};
int globalIndex{-1};
int mcParticleId{-1};
};

using MyBCs = soa::Join<aod::BCsWithTimestamps, aod::BcSels>;
using MyCollisions = soa::Join<aod::Collisions, aod::EvSels, aod::Mults, aod::CentFT0Ms, aod::CentFT0As, aod::CentFT0Cs>;

using MyTracks = soa::Join<aod::TracksIU, aod::TracksExtra, aod::TracksCovIU,
aod::pidTPCFullEl, aod::pidTPCFullPi, aod::pidTPCFullKa, aod::pidTPCFullPr,
aod::pidTOFFullEl, aod::pidTOFFullPi, aod::pidTOFFullKa, aod::pidTOFFullPr, aod::pidTOFbeta>;
aod::pidTPCFullEl, /*aod::pidTPCFullPi, aod::pidTPCFullKa, aod::pidTPCFullPr,*/
aod::pidTOFFullEl /*, aod::pidTOFFullPi, aod::pidTOFFullKa, aod::pidTOFFullPr, aod::pidTOFbeta*/>;

Filter collisionFilter_zvtx = eventCut.cfgZvtxMin < o2::aod::collision::posZ && o2::aod::collision::posZ < eventCut.cfgZvtxMax;
Filter collisionFilter_centrality = (eventCut.cfgCentMin < o2::aod::cent::centFT0M && o2::aod::cent::centFT0M < eventCut.cfgCentMax) || (eventCut.cfgCentMin < o2::aod::cent::centFT0A && o2::aod::cent::centFT0A < eventCut.cfgCentMax) || (eventCut.cfgCentMin < o2::aod::cent::centFT0C && o2::aod::cent::centFT0C < eventCut.cfgCentMax);
Expand Down Expand Up @@ -513,6 +522,7 @@ struct createTTP {

auto posTracks_per_coll = posTracks->sliceByCached(o2::aod::track::collisionId, collision.globalIndex(), cache);
auto negTracks_per_coll = negTracks->sliceByCached(o2::aod::track::collisionId, collision.globalIndex(), cache);
// LOGF(info, "posTracks_per_coll.size() = %d, negTracks_per_coll.size() = %d", posTracks_per_coll.size(), negTracks_per_coll.size());

o2::dataformats::DCA mDcaInfoCov;
for (const auto& tag : posTracks_per_coll) { // positron is tag
Expand All @@ -523,7 +533,7 @@ struct createTTP {
if (!isPropOK) {
continue;
}
if (!isTag(tag, tagParCov.getPt(), tagParCov.getEta(), mDcaInfoCov.getY(), mDcaInfoCov.getZ(), tagParCov.getSigmaY2(), tagParCov.getSigmaZ2(), tagParCov.getSigmaZY())) {
if (!isTag(tag, tagParCov.getPt(), tagParCov.getEta(), mDcaInfoCov.getY(), mDcaInfoCov.getZ(), tagParCov.getSigmaY2(), tagParCov.getSigmaZ2(), tagParCov.getSigmaZY()) || !isTagElectron(tag)) {
continue;
}

Expand All @@ -535,7 +545,7 @@ struct createTTP {
if (!isPropOK) {
continue;
}
if (!isProbe(probe, probeParCov.getPt(), probeParCov.getEta(), mDcaInfoCov.getY(), mDcaInfoCov.getZ())) {
if (!isProbe(probe, probeParCov.getPt(), probeParCov.getEta(), mDcaInfoCov.getY(), mDcaInfoCov.getZ()) || !isProbeElectron(probe)) {
continue;
}

Expand All @@ -544,7 +554,7 @@ struct createTTP {
ROOT::Math::PtEtaPhiMVector v12 = v1 + v2;
float mee = v12.M();
float phiv = o2::aod::pwgem::dilepton::utils::pairutil::getPhivPair(v1.Px(), v1.Py(), v1.Pz(), v2.Px(), v2.Py(), v2.Pz(), tag.sign(), probe.sign(), d_bz);
fRegistry.fill(HIST("Pair/hMvsPhiV"), phiv, mee);
fRegistry.fill(HIST("TAP/hMvsPhiV"), phiv, mee);

if ((pairCut.minMee < mee && mee < pairCut.maxMee) && (pairCut.minPhiV < phiv && phiv < pairCut.maxPhiV)) {
fRegistry.fill(HIST("Track/hs"), probeParCov.getPt(), probeParCov.getEta(), RecoDecay::constrainAngle(probeParCov.getPhi(), 0, 1U), probe.sign(), mDcaInfoCov.getY() * 1e+4, mDcaInfoCov.getZ() * 1e+4, mDcaInfoCov.getY() / std::sqrt(probeParCov.getSigmaY2()), mDcaInfoCov.getZ() / std::sqrt(probeParCov.getSigmaZ2()));
Expand All @@ -562,7 +572,7 @@ struct createTTP {
if (!isPropOK) {
continue;
}
if (!isTag(tag, tagParCov.getPt(), tagParCov.getEta(), mDcaInfoCov.getY(), mDcaInfoCov.getZ(), tagParCov.getSigmaY2(), tagParCov.getSigmaZ2(), tagParCov.getSigmaZY())) {
if (!isTag(tag, tagParCov.getPt(), tagParCov.getEta(), mDcaInfoCov.getY(), mDcaInfoCov.getZ(), tagParCov.getSigmaY2(), tagParCov.getSigmaZ2(), tagParCov.getSigmaZY()) || !isTagElectron(tag)) {
continue;
}

Expand All @@ -574,7 +584,7 @@ struct createTTP {
if (!isPropOK) {
continue;
}
if (!isProbe(probe, probeParCov.getPt(), probeParCov.getEta(), mDcaInfoCov.getY(), mDcaInfoCov.getZ())) {
if (!isProbe(probe, probeParCov.getPt(), probeParCov.getEta(), mDcaInfoCov.getY(), mDcaInfoCov.getZ()) || !isProbeElectron(probe)) {
continue;
}

Expand All @@ -583,7 +593,7 @@ struct createTTP {
ROOT::Math::PtEtaPhiMVector v12 = v1 + v2;
float mee = v12.M();
float phiv = o2::aod::pwgem::dilepton::utils::pairutil::getPhivPair(v1.Px(), v1.Py(), v1.Pz(), v2.Px(), v2.Py(), v2.Pz(), tag.sign(), probe.sign(), d_bz);
fRegistry.fill(HIST("Pair/hMvsPhiV"), phiv, mee);
fRegistry.fill(HIST("TAP/hMvsPhiV"), phiv, mee);

if ((pairCut.minMee < mee && mee < pairCut.maxMee) && (pairCut.minPhiV < phiv && phiv < pairCut.maxPhiV)) {
fRegistry.fill(HIST("Track/hs"), probeParCov.getPt(), probeParCov.getEta(), RecoDecay::constrainAngle(probeParCov.getPhi(), 0, 1U), probe.sign(), mDcaInfoCov.getY() * 1e+4, mDcaInfoCov.getZ() * 1e+4, mDcaInfoCov.getY() / std::sqrt(probeParCov.getSigmaY2()), mDcaInfoCov.getZ() / std::sqrt(probeParCov.getSigmaZ2()));
Expand All @@ -593,6 +603,109 @@ struct createTTP {
} // end of positron loop
} // end of electron loop

// for VM peak analyses
std::vector<lepton> posLeptons;
std::vector<lepton> negLeptons;
posLeptons.reserve(posTracks_per_coll.size());
negLeptons.reserve(negTracks_per_coll.size());

for (const auto& track : posTracks_per_coll) {
mDcaInfoCov.set(999, 999, 999, 999, 999);
auto trackParCov = getTrackParCov(track);
trackParCov.setPID(o2::track::PID::Electron);
bool isPropOK = o2::base::Propagator::Instance()->propagateToDCABxByBz(mVtx, trackParCov, 2.f, matCorr, &mDcaInfoCov);
if (!isPropOK) {
continue;
}
if (isProbe(track, trackParCov.getPt(), trackParCov.getEta(), mDcaInfoCov.getY(), mDcaInfoCov.getZ()) && isTagElectron(track)) {
lepton tmp;
tmp.pt = trackParCov.getPt();
tmp.eta = trackParCov.getEta();
tmp.phi = RecoDecay::constrainAngle(trackParCov.getPhi(), 0, 1U);
tmp.globalIndex = track.globalIndex();
tmp.mcParticleId = -1;
posLeptons.emplace_back(tmp);
}
} // end of positron loop

for (const auto& track : negTracks_per_coll) {
mDcaInfoCov.set(999, 999, 999, 999, 999);
auto trackParCov = getTrackParCov(track);
trackParCov.setPID(o2::track::PID::Electron);
bool isPropOK = o2::base::Propagator::Instance()->propagateToDCABxByBz(mVtx, trackParCov, 2.f, matCorr, &mDcaInfoCov);
if (!isPropOK) {
continue;
}
if (isProbe(track, trackParCov.getPt(), trackParCov.getEta(), mDcaInfoCov.getY(), mDcaInfoCov.getZ()) && isTagElectron(track)) {
lepton tmp;
tmp.pt = trackParCov.getPt();
tmp.eta = trackParCov.getEta();
tmp.phi = RecoDecay::constrainAngle(trackParCov.getPhi(), 0, 1U);
tmp.globalIndex = track.globalIndex();
tmp.mcParticleId = -1;
negLeptons.emplace_back(tmp);
}
} // end of electron loop

std::vector<int> trackIdsFromPi0;
trackIdsFromPi0.reserve(posLeptons.size() + negLeptons.size());

for (const auto& t1 : posLeptons) {
for (const auto& t2 : negLeptons) {
ROOT::Math::PtEtaPhiMVector v1(t1.pt, t1.eta, t1.phi, o2::constants::physics::MassElectron);
ROOT::Math::PtEtaPhiMVector v2(t2.pt, t2.eta, t2.phi, o2::constants::physics::MassElectron);
ROOT::Math::PtEtaPhiMVector v12 = v1 + v2;
if (v12.M() < pfGroup.maxMee) {
trackIdsFromPi0.emplace_back(t1.globalIndex);
trackIdsFromPi0.emplace_back(t2.globalIndex);
continue;
}
fRegistry.fill(HIST("Pair/uls/hMvsPt"), v12.M(), v12.Pt());
} // end of electron loop
} // end of positron loop

for (size_t i = 0; i < posLeptons.size(); i++) {
auto t1 = posLeptons[i];
for (size_t j = i + 1; j < posLeptons.size(); j++) {
auto t2 = posLeptons[j];
if (std::find(trackIdsFromPi0.begin(), trackIdsFromPi0.end(), t1.globalIndex) != trackIdsFromPi0.end()) {
continue;
}
if (std::find(trackIdsFromPi0.begin(), trackIdsFromPi0.end(), t2.globalIndex) != trackIdsFromPi0.end()) {
continue;
}
ROOT::Math::PtEtaPhiMVector v1(t1.pt, t1.eta, t1.phi, o2::constants::physics::MassElectron);
ROOT::Math::PtEtaPhiMVector v2(t2.pt, t2.eta, t2.phi, o2::constants::physics::MassElectron);
ROOT::Math::PtEtaPhiMVector v12 = v1 + v2;
fRegistry.fill(HIST("Pair/lspp/hMvsPt"), v12.M(), v12.Pt());

} // end of positron loop
} // end of positron loop

for (size_t i = 0; i < negLeptons.size(); i++) {
auto t1 = negLeptons[i];
for (size_t j = i + 1; j < negLeptons.size(); j++) {
auto t2 = negLeptons[j];
if (std::find(trackIdsFromPi0.begin(), trackIdsFromPi0.end(), t1.globalIndex) != trackIdsFromPi0.end()) {
continue;
}
if (std::find(trackIdsFromPi0.begin(), trackIdsFromPi0.end(), t2.globalIndex) != trackIdsFromPi0.end()) {
continue;
}
ROOT::Math::PtEtaPhiMVector v1(t1.pt, t1.eta, t1.phi, o2::constants::physics::MassElectron);
ROOT::Math::PtEtaPhiMVector v2(t2.pt, t2.eta, t2.phi, o2::constants::physics::MassElectron);
ROOT::Math::PtEtaPhiMVector v12 = v1 + v2;
fRegistry.fill(HIST("Pair/lsmm/hMvsPt"), v12.M(), v12.Pt());
} // end of electron loop
} // end of electron loop

posLeptons.clear();
posLeptons.shrink_to_fit();
negLeptons.clear();
negLeptons.shrink_to_fit();
trackIdsFromPi0.clear();
trackIdsFromPi0.shrink_to_fit();

} // end of collision loop
} // end of runTAP

Expand All @@ -602,13 +715,6 @@ struct createTTP {
}
PROCESS_SWITCH(createTTP, processData, "process data", true);

struct lepton {
float pt{0};
float eta{0};
float phi{0};
int mcParticleId{-1};
};

using MyCollisionsMC = soa::Join<MyCollisions, aod::McCollisionLabels>;
using MyTracksMC = soa::Join<MyTracks, aod::McTrackLabels>;

Expand Down Expand Up @@ -639,11 +745,13 @@ struct createTTP {
mVtx.setPos({collision.posX(), collision.posY(), collision.posZ()});
mVtx.setCov(collision.covXX(), collision.covXY(), collision.covYY(), collision.covXZ(), collision.covYZ(), collision.covZZ());

auto tracks_per_coll = tracks.sliceBy(perCol, collision.globalIndex());
std::vector<lepton> posLeptons;
std::vector<lepton> negLeptons;
posLeptons.reserve(tracks_per_coll.size());
negLeptons.reserve(tracks_per_coll.size());

o2::dataformats::DCA mDcaInfoCov;
auto tracks_per_coll = tracks.sliceBy(perCol, collision.globalIndex());
for (const auto& track : tracks_per_coll) {
if (!track.has_mcParticle()) {
continue;
Expand Down Expand Up @@ -671,7 +779,7 @@ struct createTTP {
if (!isPropOK) {
continue;
}
if (!isProbe(track, trackParCov.getPt(), trackParCov.getEta(), mDcaInfoCov.getY(), mDcaInfoCov.getZ())) {
if (!isProbe(track, trackParCov.getPt(), trackParCov.getEta(), mDcaInfoCov.getY(), mDcaInfoCov.getZ())) { // PID cut is not necessary, because this is true electron.
continue;
}

Expand All @@ -681,6 +789,7 @@ struct createTTP {
tmp.pt = trackParCov.getPt();
tmp.eta = trackParCov.getEta();
tmp.phi = RecoDecay::constrainAngle(trackParCov.getPhi(), 0, 1U);
tmp.globalIndex = track.globalIndex();
tmp.mcParticleId = mcParticle.globalIndex();

if (track.sign() > 0) {
Expand Down
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