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#include <iostream>
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
#include "DataFormats/Candidate/interface/CandidateFwd.h"
#include "DataFormats/RecoCandidate/interface/RecoCandidate.h"
#include "DataFormats/RecoCandidate/interface/RecoChargedCandidate.h"
#include "DataFormats/RecoCandidate/interface/RecoChargedCandidateFwd.h"
#include "DataFormats/Candidate/interface/Candidate.h"
#include "DataFormats/HLTReco/interface/TriggerFilterObjectWithRefs.h"
#include "DataFormats/HLTReco/interface/TriggerRefsCollections.h"
#include "DataFormats/TrackReco/interface/TrackFwd.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/VertexReco/interface/Vertex.h"
#include "DataFormats/VertexReco/interface/VertexFwd.h"
#include "DataFormats/Common/interface/RefToBase.h"
#include "RecoVertex/KalmanVertexFit/interface/KalmanVertexFitter.h"
#include "RecoVertex/VertexPrimitives/interface/TransientVertex.h"
#include "HLTDisplacedtktkVtxProducer.h"
using namespace edm;
using namespace reco;
using namespace std;
using namespace trigger;
//
// constructors and destructor
//
HLTDisplacedtktkVtxProducer::HLTDisplacedtktkVtxProducer(const edm::ParameterSet& iConfig)
: transientTrackRecordToken_(esConsumes(edm::ESInputTag("", "TransientTrackBuilder"))),
srcTag_(iConfig.getParameter<edm::InputTag>("Src")),
srcToken_(consumes<reco::RecoChargedCandidateCollection>(srcTag_)),
previousCandTag_(iConfig.getParameter<edm::InputTag>("PreviousCandTag")),
previousCandToken_(consumes<trigger::TriggerFilterObjectWithRefs>(previousCandTag_)),
maxEta_(iConfig.getParameter<double>("MaxEta")),
minPt_(iConfig.getParameter<double>("MinPt")),
minPtPair_(iConfig.getParameter<double>("MinPtPair")),
minInvMass_(iConfig.getParameter<double>("MinInvMass")),
maxInvMass_(iConfig.getParameter<double>("MaxInvMass")),
massParticle1_(iConfig.getParameter<double>("massParticle1")),
massParticle2_(iConfig.getParameter<double>("massParticle2")),
chargeOpt_(iConfig.getParameter<int>("ChargeOpt")),
triggerTypeDaughters_(iConfig.getParameter<int>("triggerTypeDaughters")) {
produces<VertexCollection>();
}
HLTDisplacedtktkVtxProducer::~HLTDisplacedtktkVtxProducer() = default;
void HLTDisplacedtktkVtxProducer::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
edm::ParameterSetDescription desc;
desc.add<edm::InputTag>("Src", edm::InputTag("hltL3MuonCandidates"));
desc.add<edm::InputTag>("PreviousCandTag", edm::InputTag(""));
desc.add<double>("MaxEta", 2.5);
desc.add<double>("MinPt", 0.0);
desc.add<double>("MinPtPair", 0.0);
desc.add<double>("MinInvMass", 1.0);
desc.add<double>("MaxInvMass", 20.0);
desc.add<double>("massParticle1", 0.1396);
desc.add<double>("massParticle2", 0.4937);
desc.add<int>("ChargeOpt", -1);
desc.add<int>("triggerTypeDaughters", 0);
descriptions.add("hltDisplacedtktkVtxProducer", desc);
}
// ------------ method called on each new Event ------------
void HLTDisplacedtktkVtxProducer::produce(edm::Event& iEvent, const edm::EventSetup& iSetup) {
double const firstTrackMass = massParticle1_;
double const firstTrackMass2 = firstTrackMass * firstTrackMass;
double const secondTrackMass = massParticle2_;
double const secondTrackMass2 = secondTrackMass * secondTrackMass;
// get hold of track trks
Handle<RecoChargedCandidateCollection> trackcands;
iEvent.getByToken(srcToken_, trackcands);
// get the transient track builder
auto const& theB = iSetup.getHandle(transientTrackRecordToken_);
std::unique_ptr<VertexCollection> vertexCollection(new VertexCollection());
// look at all trackcands, check cuts and make vertices
double e1, e2;
Particle::LorentzVector p, p1, p2;
RecoChargedCandidateCollection::const_iterator cand1;
RecoChargedCandidateCollection::const_iterator cand2;
// get the objects passing the previous filter
Handle<TriggerFilterObjectWithRefs> previousCands;
iEvent.getByToken(previousCandToken_, previousCands);
vector<RecoChargedCandidateRef> vPrevCands;
previousCands->getObjects(triggerTypeDaughters_, vPrevCands);
std::vector<bool> candComp;
for (cand1 = trackcands->begin(); cand1 != trackcands->end(); cand1++)
candComp.push_back(checkPreviousCand(cand1->get<TrackRef>(), vPrevCands));
for (cand1 = trackcands->begin(); cand1 != trackcands->end(); cand1++) {
TrackRef tk1 = cand1->get<TrackRef>();
LogDebug("HLTDisplacedtktkVtxProducer") << " 1st track in loop: q*pt= " << cand1->charge() * cand1->pt()
<< ", eta= " << cand1->eta() << ", hits= " << tk1->numberOfValidHits();
//first check if this track passed the previous filter
if (!candComp[cand1 - trackcands->begin()])
continue;
// if( ! checkPreviousCand( tk1, vPrevCands) ) continue;
// cuts
if (abs(cand1->eta()) > maxEta_)
continue;
if (cand1->pt() < minPt_)
continue;
cand2 = trackcands->begin();
if (massParticle1_ == massParticle2_) {
cand2 = cand1 + 1;
}
for (; cand2 != trackcands->end(); cand2++) {
TrackRef tk2 = cand2->get<TrackRef>();
if (tk1 == tk2)
continue;
// eta cut
LogDebug("HLTDisplacedtktkVtxProducer")
<< " 2nd track in loop: q*pt= " << cand2->charge() * cand2->pt() << ", eta= " << cand2->eta()
<< ", hits= " << tk2->numberOfValidHits() << ", d0= " << tk2->d0();
//first check if this track passed the previous filter
if (!candComp[cand2 - trackcands->begin()])
continue;
// if( ! checkPreviousCand( tk2, vPrevCands) ) continue;
// cuts
if (abs(cand2->eta()) > maxEta_)
continue;
if (cand2->pt() < minPt_)
continue;
// opposite sign or same sign
if (chargeOpt_ < 0) {
if (cand1->charge() * cand2->charge() > 0)
continue;
} else if (chargeOpt_ > 0) {
if (cand1->charge() * cand2->charge() < 0)
continue;
}
// Combined ditrack system
e1 = sqrt(cand1->momentum().Mag2() + firstTrackMass2);
e2 = sqrt(cand2->momentum().Mag2() + secondTrackMass2);
p1 = Particle::LorentzVector(cand1->px(), cand1->py(), cand1->pz(), e1);
p2 = Particle::LorentzVector(cand2->px(), cand2->py(), cand2->pz(), e2);
p = p1 + p2;
if (p.pt() < minPtPair_)
continue;
double invmass = abs(p.mass());
LogDebug("HLTDisplacedtktkVtxProducer") << " ... 1-2 invmass= " << invmass;
if (invmass < minInvMass_)
continue;
if (invmass > maxInvMass_)
continue;
// do the vertex fit
vector<TransientTrack> t_tks;
TransientTrack ttkp1 = (*theB).build(&tk1);
TransientTrack ttkp2 = (*theB).build(&tk2);
t_tks.push_back(ttkp1);
t_tks.push_back(ttkp2);
if (t_tks.size() != 2)
continue;
KalmanVertexFitter kvf;
TransientVertex tv = kvf.vertex(t_tks);
if (!tv.isValid())
continue;
Vertex vertex = tv;
// put vertex in the event
vertexCollection->push_back(vertex);
}
}
iEvent.put(std::move(vertexCollection));
}
bool HLTDisplacedtktkVtxProducer::checkPreviousCand(const TrackRef& trackref,
const vector<RecoChargedCandidateRef>& refVect) const {
bool ok = false;
for (auto& i : refVect) {
if (i->get<TrackRef>() == trackref) {
ok = true;
break;
}
}
return ok;
}
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