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// -*- C++ -*-
//
// Package: PixelJetPuId
// Class: PixelJetPuId
//
/**\class PixelJetPuId PixelJetPuId.cc RecoBTag/PixelJetPuId/src/PixelJetPuId.cc
Description:
The PixelJetPuId module select all the pixel tracks compatible with a jet.
If the sum of the tracks momentum is under a threshold the jet is tagged as "PUjets".
Implementation:
[Notes on implementation]
*/
//
// Original Author: Silvio DONATO
// Created: Wed Dec 18 10:05:40 CET 2013
//
//
// system include files
#include <memory>
#include <algorithm>
// user include files
#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/global/EDProducer.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/Framework/interface/makeRefToBaseProdFrom.h"
#include "FWCore/Utilities/interface/InputTag.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
#include "FWCore/ParameterSet/interface/ParameterSetDescription.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/JetReco/interface/CaloJet.h"
#include "DataFormats/JetReco/interface/CaloJetCollection.h"
#include "DataFormats/VertexReco/interface/VertexFwd.h"
#include "DataFormats/VertexReco/interface/Vertex.h"
#include "TrackingTools/IPTools/interface/IPTools.h"
#include "TrackingTools/TransientTrack/interface/TransientTrack.h"
#include "TrackingTools/TransientTrack/interface/TransientTrackBuilder.h"
#include "TrackingTools/Records/interface/TransientTrackRecord.h"
#include "DataFormats/Math/interface/deltaR.h"
#include "DataFormats/BTauReco/interface/JetTag.h"
#include "DataFormats/Common/interface/RefToBase.h"
//
// class declaration
//
class PixelJetPuId : public edm::global::EDProducer<> {
public:
PixelJetPuId(const edm::ParameterSet&);
~PixelJetPuId() override;
static void fillDescriptions(edm::ConfigurationDescriptions& descriptions);
private:
void produce(edm::StreamID sid, edm::Event&, const edm::EventSetup&) const override;
// ----------member data ---------------------------
edm::ESGetToken<TransientTrackBuilder, TransientTrackRecord> const transientTrackRecordToken_;
edm::InputTag m_primaryVertex;
edm::InputTag m_tracks;
edm::InputTag m_jets;
edm::EDGetTokenT<std::vector<reco::Track> > tracksToken;
edm::EDGetTokenT<edm::View<reco::CaloJet> > jetsToken;
edm::EDGetTokenT<edm::View<reco::Jet> > generaljetsToken;
edm::EDGetTokenT<reco::VertexCollection> primaryVertexToken;
double m_MinTrackPt;
double m_MaxTrackChi2;
double m_MaxTrackDistanceToJet;
bool m_fwjets;
double m_mineta_fwjets;
double m_minet_fwjets;
double m_MinGoodJetTrackPt;
double m_MinGoodJetTrackPtRatio;
};
//
// constructors and destructor
//
PixelJetPuId::PixelJetPuId(const edm::ParameterSet& iConfig)
: transientTrackRecordToken_(esConsumes(edm::ESInputTag("", "TransientTrackBuilder"))) {
//InputTag
m_tracks = iConfig.getParameter<edm::InputTag>("tracks");
tracksToken = consumes<std::vector<reco::Track> >(m_tracks);
m_jets = iConfig.getParameter<edm::InputTag>("jets");
jetsToken = consumes<edm::View<reco::CaloJet> >(m_jets);
generaljetsToken = consumes<edm::View<reco::Jet> >(m_jets);
m_primaryVertex = iConfig.getParameter<edm::InputTag>("primaryVertex");
primaryVertexToken = consumes<reco::VertexCollection>(m_primaryVertex);
//Tracks Selection
m_MinTrackPt = iConfig.getParameter<double>("MinTrackPt");
m_MaxTrackDistanceToJet = iConfig.getParameter<double>("MaxTrackDistanceToJet");
m_MaxTrackChi2 = iConfig.getParameter<double>("MaxTrackChi2");
//A jet is defined as a signal jet if Sum(trackPt) > minPt or Sum(comp.trackPt)/CaloJetPt > minPtRatio
m_MinGoodJetTrackPt = iConfig.getParameter<double>("MinGoodJetTrackPt");
m_MinGoodJetTrackPtRatio = iConfig.getParameter<double>("MinGoodJetTrackPtRatio");
m_fwjets = iConfig.getParameter<bool>("UseForwardJetsAsNoPU");
m_mineta_fwjets = iConfig.getParameter<double>("MinEtaForwardJets");
m_minet_fwjets = iConfig.getParameter<double>("MinEtForwardJets");
produces<std::vector<reco::CaloJet> >();
produces<std::vector<reco::CaloJet> >("PUjets");
produces<reco::JetTagCollection>();
}
PixelJetPuId::~PixelJetPuId() = default;
void PixelJetPuId::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
edm::ParameterSetDescription desc;
desc.add<edm::InputTag>("jets", edm::InputTag("hltCaloJetL1FastJetCorrected"));
desc.add<edm::InputTag>("tracks", edm::InputTag("hltPixelTracksNoPU"));
desc.add<edm::InputTag>("primaryVertex", edm::InputTag("hltFastPVPixelVertices"));
desc.add<double>("MinGoodJetTrackPtRatio", 0.045);
desc.add<double>("MinGoodJetTrackPt", 1.8);
desc.add<double>("MaxTrackDistanceToJet", 0.04);
desc.add<double>("MinTrackPt", 0.6);
desc.add<double>("MaxTrackChi2", 20.);
desc.add<bool>("UseForwardJetsAsNoPU", true);
desc.add<double>("MinEtaForwardJets", 2.4);
desc.add<double>("MinEtForwardJets", 40.);
descriptions.add("pixelJetPuId", desc);
}
//
// member functions
//
// ------------ method called on each new Event ------------
void PixelJetPuId::produce(edm::StreamID sid, edm::Event& iEvent, const edm::EventSetup& iSetup) const {
using namespace edm;
std::unique_ptr<std::vector<reco::CaloJet> > pOut(new std::vector<reco::CaloJet>);
std::unique_ptr<std::vector<reco::CaloJet> > pOut_PUjets(new std::vector<reco::CaloJet>);
std::unique_ptr<reco::JetTagCollection> pOut_jetTagCollection(new reco::JetTagCollection);
//get tracks
Handle<std::vector<reco::Track> > tracks;
iEvent.getByToken(tracksToken, tracks);
uint const asize = std::max(1u, (uint)tracks->size());
float teta[asize], tphi[asize];
uint tsize = 0;
for (auto const& tr : *tracks) {
teta[tsize] = tr.eta();
tphi[tsize] = tr.phi();
++tsize;
}
//get jets
Handle<edm::View<reco::CaloJet> > jets;
iEvent.getByToken(jetsToken, jets);
Handle<edm::View<reco::Jet> > generaljets;
iEvent.getByToken(generaljetsToken, generaljets);
//get primary vertices
Handle<reco::VertexCollection> primaryVertex;
iEvent.getByToken(primaryVertexToken, primaryVertex);
//get Transient Track Builder
auto const& builder = iSetup.getHandle(transientTrackRecordToken_);
//init JetTagCollection
if (!generaljets.product()->empty()) {
edm::RefToBase<reco::Jet> jj = edm::RefToBase<reco::Jet>(generaljets, 0);
pOut_jetTagCollection = std::make_unique<reco::JetTagCollection>(edm::makeRefToBaseProdFrom(jj, iEvent));
}
//loop on trackIPTagInfos
if (!primaryVertex->empty()) {
const reco::Vertex* pv = &*primaryVertex->begin();
//loop on jets
for (edm::View<reco::CaloJet>::const_iterator itJet = jets->begin(); itJet != jets->end(); itJet++) {
math::XYZVector jetMomentum = itJet->momentum();
GlobalVector direction(jetMomentum.x(), jetMomentum.y(), jetMomentum.z());
math::XYZVector trMomentum;
if (fabs(itJet->eta()) > m_mineta_fwjets) {
if ((m_fwjets) && (itJet->et() > m_minet_fwjets))
pOut->push_back(*itJet); // fill forward jet as signal jet
} else {
//loop on tracks
auto itTrack = tracks->begin();
for (unsigned int i = 0; i < tsize; ++i) {
float deltaR2 = reco::deltaR2(itJet->eta(), itJet->phi(), teta[i], tphi[i]);
if (deltaR2 < 0.25) {
reco::TransientTrack transientTrack = builder->build(*itTrack);
float jetTrackDistance = -((IPTools::jetTrackDistance(transientTrack, direction, *pv)).second).value();
//select the tracks compabible with the jet
if ((itTrack->pt() > m_MinTrackPt) && (itTrack->normalizedChi2() < m_MaxTrackChi2) &&
(jetTrackDistance < m_MaxTrackDistanceToJet)) {
trMomentum += itTrack->momentum(); //calculate the Sum(trackPt)
}
}
itTrack++;
}
//if Sum(comp.trackPt)/CaloJetPt > minPtRatio or Sum(trackPt) > minPt the jet is a signal jet
if (trMomentum.rho() / jetMomentum.rho() > m_MinGoodJetTrackPtRatio || trMomentum.rho() > m_MinGoodJetTrackPt) {
pOut->push_back(*itJet); // fill it as signal jet
} else //else it is a PUjet
{
pOut_PUjets->push_back(*itJet); // fill it as PUjets
}
}
RefToBase<reco::Jet> jRef(generaljets, itJet - jets->begin());
(*pOut_jetTagCollection)[jRef] = trMomentum.rho(); // fill jetTagCollection
}
}
iEvent.put(std::move(pOut));
iEvent.put(std::move(pOut_PUjets), "PUjets");
iEvent.put(std::move(pOut_jetTagCollection));
}
// declare this class as a framework plugin
DEFINE_FWK_MODULE(PixelJetPuId);
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