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#include "HeavyFlavorAnalysis/Onia2MuMu/interface/Onia2MuMuPAT.h"
//Headers for the data items
#include <DataFormats/TrackReco/interface/TrackFwd.h>
#include <DataFormats/TrackReco/interface/Track.h>
#include <DataFormats/MuonReco/interface/MuonFwd.h>
#include <DataFormats/MuonReco/interface/Muon.h>
#include <DataFormats/Common/interface/View.h>
#include <DataFormats/HepMCCandidate/interface/GenParticle.h>
#include <DataFormats/PatCandidates/interface/Muon.h>
#include <DataFormats/VertexReco/interface/VertexFwd.h>
//Headers for services and tools
#include "RecoVertex/KalmanVertexFit/interface/KalmanVertexFitter.h"
#include "RecoVertex/VertexTools/interface/VertexDistanceXY.h"
#include "TMath.h"
#include "Math/VectorUtil.h"
#include "TVector3.h"
#include "HeavyFlavorAnalysis/Onia2MuMu/interface/OniaVtxReProducer.h"
#include "TrackingTools/PatternTools/interface/TwoTrackMinimumDistance.h"
#include "TrackingTools/IPTools/interface/IPTools.h"
#include "TrackingTools/PatternTools/interface/ClosestApproachInRPhi.h"
#include "TrackingTools/Records/interface/TransientTrackRecord.h"
Onia2MuMuPAT::Onia2MuMuPAT(const edm::ParameterSet &iConfig)
: muons_(consumes<edm::View<pat::Muon>>(iConfig.getParameter<edm::InputTag>("muons"))),
thebeamspot_(consumes<reco::BeamSpot>(iConfig.getParameter<edm::InputTag>("beamSpotTag"))),
thePVs_(consumes<reco::VertexCollection>(iConfig.getParameter<edm::InputTag>("primaryVertexTag"))),
magneticFieldToken_(esConsumes<MagneticField, IdealMagneticFieldRecord>()),
theTTBuilderToken_(
esConsumes<TransientTrackBuilder, TransientTrackRecord>(edm::ESInputTag("", "TransientTrackBuilder"))),
higherPuritySelection_(iConfig.getParameter<std::string>("higherPuritySelection")),
lowerPuritySelection_(iConfig.getParameter<std::string>("lowerPuritySelection")),
dimuonSelection_(iConfig.getParameter<std::string>("dimuonSelection")),
addCommonVertex_(iConfig.getParameter<bool>("addCommonVertex")),
addMuonlessPrimaryVertex_(iConfig.getParameter<bool>("addMuonlessPrimaryVertex")),
resolveAmbiguity_(iConfig.getParameter<bool>("resolvePileUpAmbiguity")),
addMCTruth_(iConfig.getParameter<bool>("addMCTruth")) {
revtxtrks_ = consumes<reco::TrackCollection>(
(edm::InputTag) "generalTracks"); //if that is not true, we will raise an exception
revtxbs_ = consumes<reco::BeamSpot>((edm::InputTag) "offlineBeamSpot");
produces<pat::CompositeCandidateCollection>();
}
//
// member functions
//
// ------------ method called to produce the data ------------
void Onia2MuMuPAT::produce(edm::Event &iEvent, const edm::EventSetup &iSetup) {
using namespace edm;
using namespace std;
using namespace reco;
typedef Candidate::LorentzVector LorentzVector;
vector<double> muMasses;
muMasses.push_back(0.1056583715);
muMasses.push_back(0.1056583715);
std::unique_ptr<pat::CompositeCandidateCollection> oniaOutput(new pat::CompositeCandidateCollection);
Vertex thePrimaryV;
Vertex theBeamSpotV;
const MagneticField &field = iSetup.getData(magneticFieldToken_);
Handle<BeamSpot> theBeamSpot;
iEvent.getByToken(thebeamspot_, theBeamSpot);
BeamSpot bs = *theBeamSpot;
theBeamSpotV = Vertex(bs.position(), bs.covariance3D());
Handle<VertexCollection> priVtxs;
iEvent.getByToken(thePVs_, priVtxs);
if (priVtxs->begin() != priVtxs->end()) {
thePrimaryV = Vertex(*(priVtxs->begin()));
} else {
thePrimaryV = Vertex(bs.position(), bs.covariance3D());
}
Handle<View<pat::Muon>> muons;
iEvent.getByToken(muons_, muons);
edm::ESHandle<TransientTrackBuilder> theTTBuilder = iSetup.getHandle(theTTBuilderToken_);
KalmanVertexFitter vtxFitter(true);
TrackCollection muonLess;
// JPsi candidates only from muons
for (View<pat::Muon>::const_iterator it = muons->begin(), itend = muons->end(); it != itend; ++it) {
// both must pass low quality
if (!lowerPuritySelection_(*it))
continue;
for (View<pat::Muon>::const_iterator it2 = it + 1; it2 != itend; ++it2) {
// both must pass low quality
if (!lowerPuritySelection_(*it2))
continue;
// one must pass tight quality
if (!(higherPuritySelection_(*it) || higherPuritySelection_(*it2)))
continue;
pat::CompositeCandidate myCand;
vector<TransientVertex> pvs;
// ---- no explicit order defined ----
myCand.addDaughter(*it, "muon1");
myCand.addDaughter(*it2, "muon2");
// ---- define and set candidate's 4momentum ----
LorentzVector jpsi = it->p4() + it2->p4();
myCand.setP4(jpsi);
myCand.setCharge(it->charge() + it2->charge());
// ---- apply the dimuon cut ----
if (!dimuonSelection_(myCand))
continue;
// ---- fit vertex using Tracker tracks (if they have tracks) ----
if (it->track().isNonnull() && it2->track().isNonnull()) {
//build the dimuon secondary vertex
vector<TransientTrack> t_tks;
t_tks.push_back(theTTBuilder->build(
*it->track())); // pass the reco::Track, not the reco::TrackRef (which can be transient)
t_tks.push_back(theTTBuilder->build(*it2->track())); // otherwise the vertex will have transient refs inside.
TransientVertex myVertex = vtxFitter.vertex(t_tks);
CachingVertex<5> VtxForInvMass = vtxFitter.vertex(t_tks);
Measurement1D MassWErr(jpsi.M(), -9999.);
if (field.nominalValue() > 0) {
MassWErr = massCalculator.invariantMass(VtxForInvMass, muMasses);
} else {
myVertex = TransientVertex(); // with no arguments it is invalid
}
myCand.addUserFloat("MassErr", MassWErr.error());
if (myVertex.isValid()) {
float vChi2 = myVertex.totalChiSquared();
float vNDF = myVertex.degreesOfFreedom();
float vProb(TMath::Prob(vChi2, (int)vNDF));
myCand.addUserFloat("vNChi2", vChi2 / vNDF);
myCand.addUserFloat("vProb", vProb);
TVector3 vtx;
TVector3 pvtx;
VertexDistanceXY vdistXY;
vtx.SetXYZ(myVertex.position().x(), myVertex.position().y(), 0);
TVector3 pperp(jpsi.px(), jpsi.py(), 0);
AlgebraicVector3 vpperp(pperp.x(), pperp.y(), 0);
if (resolveAmbiguity_) {
float minDz = 999999.;
TwoTrackMinimumDistance ttmd;
bool status = ttmd.calculate(
GlobalTrajectoryParameters(
GlobalPoint(myVertex.position().x(), myVertex.position().y(), myVertex.position().z()),
GlobalVector(myCand.px(), myCand.py(), myCand.pz()),
TrackCharge(0),
&(field)),
GlobalTrajectoryParameters(GlobalPoint(bs.position().x(), bs.position().y(), bs.position().z()),
GlobalVector(bs.dxdz(), bs.dydz(), 1.),
TrackCharge(0),
&(field)));
float extrapZ = -9E20;
if (status)
extrapZ = ttmd.points().first.z();
for (VertexCollection::const_iterator itv = priVtxs->begin(), itvend = priVtxs->end(); itv != itvend;
++itv) {
float deltaZ = fabs(extrapZ - itv->position().z());
if (deltaZ < minDz) {
minDz = deltaZ;
thePrimaryV = Vertex(*itv);
}
}
}
Vertex theOriginalPV = thePrimaryV;
muonLess.clear();
muonLess.reserve(thePrimaryV.tracksSize());
if (addMuonlessPrimaryVertex_ && thePrimaryV.tracksSize() > 2) {
// Primary vertex matched to the dimuon, now refit it removing the two muons
OniaVtxReProducer revertex(priVtxs, iEvent);
edm::Handle<reco::TrackCollection> pvtracks;
iEvent.getByToken(revtxtrks_, pvtracks);
if (!pvtracks.isValid()) {
std::cout << "pvtracks NOT valid " << std::endl;
} else {
edm::Handle<reco::BeamSpot> pvbeamspot;
iEvent.getByToken(revtxbs_, pvbeamspot);
if (pvbeamspot.id() != theBeamSpot.id())
edm::LogWarning("Inconsistency")
<< "The BeamSpot used for PV reco is not the same used in this analyzer.";
// I need to go back to the reco::Muon object, as the TrackRef in the pat::Muon can be an embedded ref.
const reco::Muon *rmu1 = dynamic_cast<const reco::Muon *>(it->originalObject());
const reco::Muon *rmu2 = dynamic_cast<const reco::Muon *>(it2->originalObject());
// check that muons are truly from reco::Muons (and not, e.g., from PF Muons)
// also check that the tracks really come from the track collection used for the BS
if (rmu1 != nullptr && rmu2 != nullptr && rmu1->track().id() == pvtracks.id() &&
rmu2->track().id() == pvtracks.id()) {
// Save the keys of the tracks in the primary vertex
// std::vector<size_t> vertexTracksKeys;
// vertexTracksKeys.reserve(thePrimaryV.tracksSize());
if (thePrimaryV.hasRefittedTracks()) {
// Need to go back to the original tracks before taking the key
std::vector<reco::Track>::const_iterator itRefittedTrack = thePrimaryV.refittedTracks().begin();
std::vector<reco::Track>::const_iterator refittedTracksEnd = thePrimaryV.refittedTracks().end();
for (; itRefittedTrack != refittedTracksEnd; ++itRefittedTrack) {
if (thePrimaryV.originalTrack(*itRefittedTrack).key() == rmu1->track().key())
continue;
if (thePrimaryV.originalTrack(*itRefittedTrack).key() == rmu2->track().key())
continue;
// vertexTracksKeys.push_back(thePrimaryV.originalTrack(*itRefittedTrack).key());
muonLess.push_back(*(thePrimaryV.originalTrack(*itRefittedTrack)));
}
} else {
std::vector<reco::TrackBaseRef>::const_iterator itPVtrack = thePrimaryV.tracks_begin();
for (; itPVtrack != thePrimaryV.tracks_end(); ++itPVtrack)
if (itPVtrack->isNonnull()) {
if (itPVtrack->key() == rmu1->track().key())
continue;
if (itPVtrack->key() == rmu2->track().key())
continue;
// vertexTracksKeys.push_back(itPVtrack->key());
muonLess.push_back(**itPVtrack);
}
}
if (muonLess.size() > 1 && muonLess.size() < thePrimaryV.tracksSize()) {
pvs = revertex.makeVertices(muonLess, *pvbeamspot, *theTTBuilder);
if (!pvs.empty()) {
Vertex muonLessPV = Vertex(pvs.front());
thePrimaryV = muonLessPV;
}
}
}
}
}
// count the number of high Purity tracks with pT > 900 MeV attached to the chosen vertex
double vertexWeight = -1., sumPTPV = -1.;
int countTksOfPV = -1;
const reco::Muon *rmu1 = dynamic_cast<const reco::Muon *>(it->originalObject());
const reco::Muon *rmu2 = dynamic_cast<const reco::Muon *>(it2->originalObject());
try {
for (reco::Vertex::trackRef_iterator itVtx = theOriginalPV.tracks_begin();
itVtx != theOriginalPV.tracks_end();
itVtx++)
if (itVtx->isNonnull()) {
const reco::Track &track = **itVtx;
if (!track.quality(reco::TrackBase::highPurity))
continue;
if (track.pt() < 0.5)
continue; //reject all rejects from counting if less than 900 MeV
TransientTrack tt = theTTBuilder->build(track);
pair<bool, Measurement1D> tkPVdist = IPTools::absoluteImpactParameter3D(tt, thePrimaryV);
if (!tkPVdist.first)
continue;
if (tkPVdist.second.significance() > 3)
continue;
if (track.ptError() / track.pt() > 0.1)
continue;
// do not count the two muons
if (rmu1 != nullptr && rmu1->innerTrack().key() == itVtx->key())
continue;
if (rmu2 != nullptr && rmu2->innerTrack().key() == itVtx->key())
continue;
vertexWeight += theOriginalPV.trackWeight(*itVtx);
if (theOriginalPV.trackWeight(*itVtx) > 0.5) {
countTksOfPV++;
sumPTPV += track.pt();
}
}
} catch (std::exception &err) {
std::cout << " muon Selection%G�%@failed " << std::endl;
return;
}
myCand.addUserInt("countTksOfPV", countTksOfPV);
myCand.addUserFloat("vertexWeight", (float)vertexWeight);
myCand.addUserFloat("sumPTPV", (float)sumPTPV);
///DCA
TrajectoryStateClosestToPoint mu1TS = t_tks[0].impactPointTSCP();
TrajectoryStateClosestToPoint mu2TS = t_tks[1].impactPointTSCP();
float dca = 1E20;
if (mu1TS.isValid() && mu2TS.isValid()) {
ClosestApproachInRPhi cApp;
cApp.calculate(mu1TS.theState(), mu2TS.theState());
if (cApp.status())
dca = cApp.distance();
}
myCand.addUserFloat("DCA", dca);
///end DCA
if (addMuonlessPrimaryVertex_)
myCand.addUserData("muonlessPV", Vertex(thePrimaryV));
else
myCand.addUserData("PVwithmuons", thePrimaryV);
// lifetime using PV
pvtx.SetXYZ(thePrimaryV.position().x(), thePrimaryV.position().y(), 0);
TVector3 vdiff = vtx - pvtx;
double cosAlpha = vdiff.Dot(pperp) / (vdiff.Perp() * pperp.Perp());
Measurement1D distXY = vdistXY.distance(Vertex(myVertex), thePrimaryV);
//double ctauPV = distXY.value()*cosAlpha*3.09688/pperp.Perp();
double ctauPV = distXY.value() * cosAlpha * myCand.mass() / pperp.Perp();
GlobalError v1e = (Vertex(myVertex)).error();
GlobalError v2e = thePrimaryV.error();
AlgebraicSymMatrix33 vXYe = v1e.matrix() + v2e.matrix();
//double ctauErrPV = sqrt(vXYe.similarity(vpperp))*3.09688/(pperp.Perp2());
double ctauErrPV = sqrt(ROOT::Math::Similarity(vpperp, vXYe)) * myCand.mass() / (pperp.Perp2());
myCand.addUserFloat("ppdlPV", ctauPV);
myCand.addUserFloat("ppdlErrPV", ctauErrPV);
myCand.addUserFloat("cosAlpha", cosAlpha);
// lifetime using BS
pvtx.SetXYZ(theBeamSpotV.position().x(), theBeamSpotV.position().y(), 0);
vdiff = vtx - pvtx;
cosAlpha = vdiff.Dot(pperp) / (vdiff.Perp() * pperp.Perp());
distXY = vdistXY.distance(Vertex(myVertex), theBeamSpotV);
//double ctauBS = distXY.value()*cosAlpha*3.09688/pperp.Perp();
double ctauBS = distXY.value() * cosAlpha * myCand.mass() / pperp.Perp();
GlobalError v1eB = (Vertex(myVertex)).error();
GlobalError v2eB = theBeamSpotV.error();
AlgebraicSymMatrix33 vXYeB = v1eB.matrix() + v2eB.matrix();
//double ctauErrBS = sqrt(vXYeB.similarity(vpperp))*3.09688/(pperp.Perp2());
double ctauErrBS = sqrt(ROOT::Math::Similarity(vpperp, vXYeB)) * myCand.mass() / (pperp.Perp2());
myCand.addUserFloat("ppdlBS", ctauBS);
myCand.addUserFloat("ppdlErrBS", ctauErrBS);
if (addCommonVertex_) {
myCand.addUserData("commonVertex", Vertex(myVertex));
}
} else {
myCand.addUserFloat("vNChi2", -1);
myCand.addUserFloat("vProb", -1);
myCand.addUserFloat("ppdlPV", -100);
myCand.addUserFloat("ppdlErrPV", -100);
myCand.addUserFloat("cosAlpha", -100);
myCand.addUserFloat("ppdlBS", -100);
myCand.addUserFloat("ppdlErrBS", -100);
myCand.addUserFloat("DCA", -1);
if (addCommonVertex_) {
myCand.addUserData("commonVertex", Vertex());
}
if (addMuonlessPrimaryVertex_) {
myCand.addUserData("muonlessPV", Vertex());
} else {
myCand.addUserData("PVwithmuons", Vertex());
}
}
}
// ---- MC Truth, if enabled ----
if (addMCTruth_) {
reco::GenParticleRef genMu1 = it->genParticleRef();
reco::GenParticleRef genMu2 = it2->genParticleRef();
if (genMu1.isNonnull() && genMu2.isNonnull()) {
if (genMu1->numberOfMothers() > 0 && genMu2->numberOfMothers() > 0) {
reco::GenParticleRef mom1 = genMu1->motherRef();
reco::GenParticleRef mom2 = genMu2->motherRef();
if (mom1.isNonnull() && (mom1 == mom2)) {
myCand.setGenParticleRef(mom1); // set
myCand.embedGenParticle(); // and embed
std::pair<int, float> MCinfo = findJpsiMCInfo(mom1);
myCand.addUserInt("momPDGId", MCinfo.first);
myCand.addUserFloat("ppdlTrue", MCinfo.second);
} else {
myCand.addUserInt("momPDGId", 0);
myCand.addUserFloat("ppdlTrue", -99.);
}
} else {
edm::Handle<reco::GenParticleCollection> theGenParticles;
edm::EDGetTokenT<reco::GenParticleCollection> genCands_ =
consumes<reco::GenParticleCollection>((edm::InputTag) "genParticles");
iEvent.getByToken(genCands_, theGenParticles);
if (theGenParticles.isValid()) {
for (size_t iGenParticle = 0; iGenParticle < theGenParticles->size(); ++iGenParticle) {
const Candidate &genCand = (*theGenParticles)[iGenParticle];
if (genCand.pdgId() == 443 || genCand.pdgId() == 100443 || genCand.pdgId() == 553 ||
genCand.pdgId() == 100553 || genCand.pdgId() == 200553) {
reco::GenParticleRef mom1(theGenParticles, iGenParticle);
myCand.setGenParticleRef(mom1);
myCand.embedGenParticle();
std::pair<int, float> MCinfo = findJpsiMCInfo(mom1);
myCand.addUserInt("momPDGId", MCinfo.first);
myCand.addUserFloat("ppdlTrue", MCinfo.second);
}
}
} else {
myCand.addUserInt("momPDGId", 0);
myCand.addUserFloat("ppdlTrue", -99.);
}
}
} else {
myCand.addUserInt("momPDGId", 0);
myCand.addUserFloat("ppdlTrue", -99.);
}
}
// ---- Push back output ----
oniaOutput->push_back(myCand);
}
}
std::sort(oniaOutput->begin(), oniaOutput->end(), vPComparator_);
iEvent.put(std::move(oniaOutput));
}
bool Onia2MuMuPAT::isAbHadron(int pdgID) const {
if (abs(pdgID) == 511 || abs(pdgID) == 521 || abs(pdgID) == 531 || abs(pdgID) == 5122)
return true;
return false;
}
bool Onia2MuMuPAT::isAMixedbHadron(int pdgID, int momPdgID) const {
if ((abs(pdgID) == 511 && abs(momPdgID) == 511 && pdgID * momPdgID < 0) ||
(abs(pdgID) == 531 && abs(momPdgID) == 531 && pdgID * momPdgID < 0))
return true;
return false;
}
std::pair<int, float> Onia2MuMuPAT::findJpsiMCInfo(reco::GenParticleRef genJpsi) const {
int momJpsiID = 0;
float trueLife = -99.;
if (genJpsi->numberOfMothers() > 0) {
TVector3 trueVtx(0.0, 0.0, 0.0);
TVector3 trueP(0.0, 0.0, 0.0);
TVector3 trueVtxMom(0.0, 0.0, 0.0);
trueVtx.SetXYZ(genJpsi->vertex().x(), genJpsi->vertex().y(), genJpsi->vertex().z());
trueP.SetXYZ(genJpsi->momentum().x(), genJpsi->momentum().y(), genJpsi->momentum().z());
bool aBhadron = false;
reco::GenParticleRef Jpsimom = genJpsi->motherRef(); // find mothers
if (Jpsimom.isNull()) {
std::pair<int, float> result = std::make_pair(momJpsiID, trueLife);
return result;
} else {
reco::GenParticleRef Jpsigrandmom = Jpsimom->motherRef();
if (isAbHadron(Jpsimom->pdgId())) {
if (Jpsigrandmom.isNonnull() && isAMixedbHadron(Jpsimom->pdgId(), Jpsigrandmom->pdgId())) {
momJpsiID = Jpsigrandmom->pdgId();
trueVtxMom.SetXYZ(Jpsigrandmom->vertex().x(), Jpsigrandmom->vertex().y(), Jpsigrandmom->vertex().z());
} else {
momJpsiID = Jpsimom->pdgId();
trueVtxMom.SetXYZ(Jpsimom->vertex().x(), Jpsimom->vertex().y(), Jpsimom->vertex().z());
}
aBhadron = true;
} else {
if (Jpsigrandmom.isNonnull() && isAbHadron(Jpsigrandmom->pdgId())) {
reco::GenParticleRef JpsiGrandgrandmom = Jpsigrandmom->motherRef();
if (JpsiGrandgrandmom.isNonnull() && isAMixedbHadron(Jpsigrandmom->pdgId(), JpsiGrandgrandmom->pdgId())) {
momJpsiID = JpsiGrandgrandmom->pdgId();
trueVtxMom.SetXYZ(
JpsiGrandgrandmom->vertex().x(), JpsiGrandgrandmom->vertex().y(), JpsiGrandgrandmom->vertex().z());
} else {
momJpsiID = Jpsigrandmom->pdgId();
trueVtxMom.SetXYZ(Jpsigrandmom->vertex().x(), Jpsigrandmom->vertex().y(), Jpsigrandmom->vertex().z());
}
aBhadron = true;
}
}
if (!aBhadron) {
momJpsiID = Jpsimom->pdgId();
trueVtxMom.SetXYZ(Jpsimom->vertex().x(), Jpsimom->vertex().y(), Jpsimom->vertex().z());
}
}
TVector3 vdiff = trueVtx - trueVtxMom;
//trueLife = vdiff.Perp()*3.09688/trueP.Perp();
trueLife = vdiff.Perp() * genJpsi->mass() / trueP.Perp();
}
std::pair<int, float> result = std::make_pair(momJpsiID, trueLife);
return result;
}
void Onia2MuMuPAT::fillDescriptions(edm::ConfigurationDescriptions &iDescriptions) {
edm::ParameterSetDescription desc;
desc.add<edm::InputTag>("muons");
desc.add<edm::InputTag>("beamSpotTag");
desc.add<edm::InputTag>("primaryVertexTag");
desc.add<std::string>("higherPuritySelection");
desc.add<std::string>("lowerPuritySelection");
desc.add<std::string>("dimuonSelection", "");
desc.add<bool>("addCommonVertex");
desc.add<bool>("addMuonlessPrimaryVertex");
desc.add<bool>("resolvePileUpAmbiguity");
desc.add<bool>("addMCTruth");
iDescriptions.addDefault(desc);
}
//define this as a plug-in
DEFINE_FWK_MODULE(Onia2MuMuPAT);
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