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[Backport] Adding Xi-tracks to lostTracks to 10_6_X #33962

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merged 2 commits into from Jun 4, 2021
Merged

[Backport] Adding Xi-tracks to lostTracks to 10_6_X #33962

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b902e7e
Adding Xi-tracks to lostTracks
AdrianoDee Jun 3, 2021
be4320a
Dropping xiSelection for proton charge calculation
AdrianoDee Jun 3, 2021
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23 changes: 22 additions & 1 deletion PhysicsTools/PatAlgos/plugins/PATLostTracks.cc
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Expand Up @@ -70,6 +70,8 @@ namespace pat {
const double maxDxySigForNotReconstructedPrimary_;
const bool useLegacySetup_;
const bool fillLostInnerHits_;
const bool xiSelection_;
const double xiMassCut_;
};
} // namespace pat

Expand Down Expand Up @@ -104,7 +106,9 @@ pat::PATLostTracks::PATLostTracks(const edm::ParameterSet& iConfig)
maxDxySigForNotReconstructedPrimary_(iConfig.getParameter<edm::ParameterSet>("pvAssignment")
.getParameter<double>("maxDxySigForNotReconstructedPrimary")),
useLegacySetup_(iConfig.getParameter<bool>("useLegacySetup")),
fillLostInnerHits_(iConfig.getParameter<bool>("fillLostInnerHits")) {
fillLostInnerHits_(iConfig.getParameter<bool>("fillLostInnerHits")),
xiSelection_(iConfig.getParameter<bool>("xiSelection")),
xiMassCut_(iConfig.getParameter<double>("xiMassCut")) {
std::vector<std::string> trkQuals(iConfig.getParameter<std::vector<std::string>>("qualsToAutoAccept"));
std::transform(
trkQuals.begin(), trkQuals.end(), std::back_inserter(qualsToAutoAccept_), reco::TrackBase::qualityByName);
Expand Down Expand Up @@ -194,10 +198,27 @@ void pat::PATLostTracks::produce(edm::StreamID, edm::Event& iEvent, const edm::E
}
}
for (const auto& v0 : *lambdas) {
double protonCharge = 0;
for (size_t dIdx = 0; dIdx < v0.numberOfDaughters(); dIdx++) {
size_t key = (dynamic_cast<const reco::RecoChargedCandidate*>(v0.daughter(dIdx)))->track().key();
if (trkStatus[key] == TrkStatus::NOTUSED)
trkStatus[key] = TrkStatus::VTX;
protonCharge += v0.daughter(dIdx)->charge() * v0.daughter(dIdx)->momentum().mag2();
}
if (xiSelection_) {
// selecting potential Xi- -> Lambda pi candidates
math::XYZTLorentzVector p4Lambda(v0.px(), v0.py(), v0.pz(), sqrt(v0.momentum().mag2() + v0.mass() * v0.mass()));

for (unsigned int trkIndx = 0; trkIndx < tracks->size(); trkIndx++) {
reco::TrackRef trk(tracks, trkIndx);
if ((*trk).charge() * protonCharge < 0 || trkStatus[trkIndx] != TrkStatus::NOTUSED)
continue;

math::XYZTLorentzVector p4pi(
trk->px(), trk->py(), trk->pz(), sqrt(trk->momentum().mag2() + 0.01947995518)); // pion mass ^2
if ((p4Lambda + p4pi).M() < xiMassCut_)
trkStatus[trkIndx] = TrkStatus::VTX; // selecting potential Xi- candidates
}
}
}
std::vector<int> mapping(tracks->size(), -1);
Expand Down
6 changes: 4 additions & 2 deletions PhysicsTools/PatAlgos/python/slimming/lostTracks_cfi.py
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Expand Up @@ -24,7 +24,9 @@
allowMuonId = cms.bool(False),
pvAssignment = primaryVertexAssociation.assignment,
useLegacySetup = cms.bool(True),
fillLostInnerHits = cms.bool(False)
fillLostInnerHits = cms.bool(False),
xiSelection = cms.bool(False),
xiMassCut = cms.double(1.5)
)
from Configuration.Eras.Modifier_phase1Pixel_cff import phase1Pixel
phase1Pixel.toModify(lostTracks, covarianceVersion =1 )
Expand All @@ -36,4 +38,4 @@
bParking.toModify(lostTracks, fillLostInnerHits = True)

from Configuration.Eras.Modifier_run2_miniAOD_devel_cff import run2_miniAOD_devel
(bParking | run2_miniAOD_devel).toModify(lostTracks, minPtToStoreLowQualityProps = 0.0)
(bParking | run2_miniAOD_devel).toModify(lostTracks, minPtToStoreLowQualityProps = 0.0, xiSelection = True)