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/** \class HLTMuonTrimuonL3Filter
*
* See header file for documentation
*
* \author J. Alcaraz, P. Garcia
*
*/
#include "DataFormats/Common/interface/Handle.h"
#include "DataFormats/HLTReco/interface/TriggerFilterObjectWithRefs.h"
#include "DataFormats/HLTReco/interface/TriggerRefsCollections.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/RecoCandidate/interface/RecoChargedCandidate.h"
#include "DataFormats/RecoCandidate/interface/RecoChargedCandidateFwd.h"
#include "DataFormats/MuonReco/interface/MuonFwd.h"
#include "HLTMuonTrimuonL3Filter.h"
#include "DataFormats/BeamSpot/interface/BeamSpot.h"
#include "DataFormats/MuonSeed/interface/L3MuonTrajectorySeed.h"
#include "DataFormats/MuonSeed/interface/L3MuonTrajectorySeedCollection.h"
#include "DataFormats/TrajectorySeed/interface/TrajectorySeedCollection.h"
#include "TrackingTools/PatternTools/interface/ClosestApproachInRPhi.h"
#include "TrackingTools/TransientTrack/interface/TransientTrack.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
#include "FWCore/ParameterSet/interface/ParameterSetDescription.h"
#include "FWCore/Utilities/interface/InputTag.h"
#include "DataFormats/Math/interface/deltaR.h"
using namespace edm;
using namespace std;
using namespace reco;
using namespace trigger;
//
// constructors and destructor
//
HLTMuonTrimuonL3Filter::HLTMuonTrimuonL3Filter(const edm::ParameterSet& iConfig)
: HLTFilter(iConfig),
idealMagneticFieldRecordToken_(esConsumes()),
beamspotTag_(iConfig.getParameter<edm::InputTag>("BeamSpotTag")),
beamspotToken_(consumes<reco::BeamSpot>(beamspotTag_)),
candTag_(iConfig.getParameter<edm::InputTag>("CandTag")),
candToken_(consumes<reco::RecoChargedCandidateCollection>(candTag_)),
previousCandTag_(iConfig.getParameter<InputTag>("PreviousCandTag")),
previousCandToken_(consumes<trigger::TriggerFilterObjectWithRefs>(previousCandTag_)),
fast_Accept_(iConfig.getParameter<bool>("FastAccept")),
max_Eta_(iConfig.getParameter<double>("MaxEta")),
min_Nhits_(iConfig.getParameter<int>("MinNhits")),
max_Dr_(iConfig.getParameter<double>("MaxDr")),
max_Dz_(iConfig.getParameter<double>("MaxDz")),
chargeOpt_(iConfig.getParameter<int>("ChargeOpt")),
min_PtTriplet_(iConfig.getParameter<double>("MinPtTriplet")),
min_PtMax_(iConfig.getParameter<double>("MinPtMax")),
min_PtMin_(iConfig.getParameter<double>("MinPtMin")),
min_InvMass_(iConfig.getParameter<double>("MinInvMass")),
max_InvMass_(iConfig.getParameter<double>("MaxInvMass")),
min_Acop_(iConfig.getParameter<double>("MinAcop")),
max_Acop_(iConfig.getParameter<double>("MaxAcop")),
min_PtBalance_(iConfig.getParameter<double>("MinPtBalance")),
max_PtBalance_(iConfig.getParameter<double>("MaxPtBalance")),
nsigma_Pt_(iConfig.getParameter<double>("NSigmaPt")),
max_DCAMuMu_(iConfig.getParameter<double>("MaxDCAMuMu")),
max_YTriplet_(iConfig.getParameter<double>("MaxRapidityTriplet")),
theL3LinksLabel(iConfig.getParameter<InputTag>("InputLinks")),
linkToken_(consumes<reco::MuonTrackLinksCollection>(theL3LinksLabel)) {
LogDebug("HLTMuonTrimuonL3Filter")
<< " CandTag/MinN/MaxEta/MinNhits/MaxDr/MaxDz/MinPt1/MinPt2/MinInvMass/MaxInvMass/MinAcop/MaxAcop/MinPtBalance/"
"MaxPtBalance/NSigmaPt/MaxDzMuMu/MaxRapidityTriplet : "
<< candTag_.encode() << " " << fast_Accept_ << " " << max_Eta_ << " " << min_Nhits_ << " " << max_Dr_ << " "
<< max_Dz_ << " " << chargeOpt_ << " " << min_PtTriplet_ << " " << min_PtMax_ << " " << min_PtMin_ << " "
<< min_InvMass_ << " " << max_InvMass_ << " " << min_Acop_ << " " << max_Acop_ << " " << min_PtBalance_ << " "
<< max_PtBalance_ << " " << nsigma_Pt_ << " " << max_DCAMuMu_ << " " << max_YTriplet_;
}
HLTMuonTrimuonL3Filter::~HLTMuonTrimuonL3Filter() = default;
void HLTMuonTrimuonL3Filter::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
edm::ParameterSetDescription desc;
makeHLTFilterDescription(desc);
desc.add<edm::InputTag>("BeamSpotTag", edm::InputTag("hltOfflineBeamSpot"));
desc.add<edm::InputTag>("CandTag", edm::InputTag("hltL3MuonCandidates"));
desc.add<edm::InputTag>("PreviousCandTag", edm::InputTag(""));
desc.add<bool>("FastAccept", false);
desc.add<double>("MaxEta", 2.5);
desc.add<int>("MinNhits", 0);
desc.add<double>("MaxDr", 2.0);
desc.add<double>("MaxDz", 9999.0);
desc.add<int>("ChargeOpt", 0);
desc.add<double>("MinPtTriplet", 0.0);
desc.add<double>("MinPtMax", 3.0);
desc.add<double>("MinPtMin", 3.0);
desc.add<double>("MinInvMass", 2.8);
desc.add<double>("MaxInvMass", 3.4);
desc.add<double>("MinAcop", -1.0);
desc.add<double>("MaxAcop", 3.15);
desc.add<double>("MinPtBalance", -1.0);
desc.add<double>("MaxPtBalance", 999999.0);
desc.add<double>("NSigmaPt", 0.0);
desc.add<double>("MaxDCAMuMu", 99999.9);
desc.add<double>("MaxRapidityTriplet", 999999.0);
desc.add<edm::InputTag>("InputLinks", edm::InputTag(""));
descriptions.add("hltMuonTrimuonL3Filter", desc);
}
//
// member functions
//
// ------------ method called to produce the data ------------
bool HLTMuonTrimuonL3Filter::hltFilter(edm::Event& iEvent,
const edm::EventSetup& iSetup,
trigger::TriggerFilterObjectWithRefs& filterproduct) const {
double const MuMass = 0.106;
double const MuMass2 = MuMass * MuMass;
// All HLT filters must create and fill an HLT filter object,
// recording any reconstructed physics objects satisfying (or not)
// this HLT filter, and place it in the Event.
// get hold of trks
Handle<RecoChargedCandidateCollection> mucands;
if (saveTags())
filterproduct.addCollectionTag(candTag_);
iEvent.getByToken(candToken_, mucands);
// Test to see if we can use L3MuonTrajectorySeeds:
if (mucands->empty())
return false;
auto const& tk = (*mucands)[0].track();
bool useL3MTS = false;
if (tk->seedRef().isNonnull()) {
auto a = dynamic_cast<const L3MuonTrajectorySeed*>(tk->seedRef().get());
useL3MTS = a != nullptr;
}
// sort them by L2Track
std::map<reco::TrackRef, std::vector<RecoChargedCandidateRef> > L2toL3s;
// If we can use L3MuonTrajectory seeds run the older code:
if (useL3MTS) {
unsigned int maxI = mucands->size();
for (unsigned int i = 0; i != maxI; i++) {
const TrackRef& tk = (*mucands)[i].track();
edm::Ref<L3MuonTrajectorySeedCollection> l3seedRef =
tk->seedRef().castTo<edm::Ref<L3MuonTrajectorySeedCollection> >();
TrackRef staTrack = l3seedRef->l2Track();
L2toL3s[staTrack].push_back(RecoChargedCandidateRef(mucands, i));
}
}
// Using normal TrajectorySeeds:
else {
// Read Links collection:
edm::Handle<reco::MuonTrackLinksCollection> links;
iEvent.getByToken(linkToken_, links);
// Loop over RecoChargedCandidates:
for (unsigned int i(0); i < mucands->size(); ++i) {
RecoChargedCandidateRef cand(mucands, i);
for (auto const& link : *links) {
TrackRef tk = cand->track();
// Using the same method that was used to create the links between L3 and L2
// ToDo: there should be a better way than dR,dPt matching
const reco::Track& globalTrack = *link.globalTrack();
float dR2 = deltaR2(tk->eta(), tk->phi(), globalTrack.eta(), globalTrack.phi());
float dPt = std::abs(tk->pt() - globalTrack.pt()) / tk->pt();
const TrackRef staTrack = link.standAloneTrack();
if (dR2 < 0.02 * 0.02 and dPt < 0.001) {
L2toL3s[staTrack].push_back(RecoChargedCandidateRef(cand));
}
} //MTL loop
} //RCC loop
} //end of using normal TrajectorySeeds
Handle<TriggerFilterObjectWithRefs> previousLevelCands;
iEvent.getByToken(previousCandToken_, previousLevelCands);
BeamSpot beamSpot;
Handle<BeamSpot> recoBeamSpotHandle;
iEvent.getByToken(beamspotToken_, recoBeamSpotHandle);
beamSpot = *recoBeamSpotHandle;
// Needed for DCA calculation
auto const& bFieldHandle = iSetup.getHandle(idealMagneticFieldRecordToken_);
// needed to compare to L2
vector<RecoChargedCandidateRef> vl2cands;
previousLevelCands->getObjects(TriggerMuon, vl2cands);
// look at all mucands, check cuts and add to filter object
int n = 0;
double e1, e2, e3;
Particle::LorentzVector p, p1, p2, p3;
auto L2toL3s_it1 = L2toL3s.begin();
auto L2toL3s_end = L2toL3s.end();
bool atLeastOneTriplet = false;
for (; L2toL3s_it1 != L2toL3s_end; ++L2toL3s_it1) {
if (!triggeredByLevel2(L2toL3s_it1->first, vl2cands))
continue;
//loop over the L3Tk reconstructed for this L2.
unsigned int iTk1 = 0;
unsigned int maxItk1 = L2toL3s_it1->second.size();
for (; iTk1 != maxItk1; iTk1++) {
bool thisL3Index1isDone = false;
RecoChargedCandidateRef& cand1 = L2toL3s_it1->second[iTk1];
TrackRef tk1 = cand1->get<TrackRef>();
// eta cut
LogDebug("HLTMuonTrimuonL3Filter") << " 1st muon in loop: q*pt= " << tk1->charge() * tk1->pt() << " ("
<< cand1->charge() * cand1->pt() << ") "
<< ", eta= " << tk1->eta() << " (" << cand1->eta() << ") "
<< ", hits= " << tk1->numberOfValidHits();
if (fabs(cand1->eta()) > max_Eta_)
continue;
// cut on number of hits
if (tk1->numberOfValidHits() < min_Nhits_)
continue;
//dr cut
// if (fabs(tk1->d0())>max_Dr_) continue;
if (fabs((-(cand1->vx() - beamSpot.x0()) * cand1->py() + (cand1->vy() - beamSpot.y0()) * cand1->px()) /
cand1->pt()) > max_Dr_)
continue;
//dz cut
if (fabs((cand1->vz() - beamSpot.z0()) -
((cand1->vx() - beamSpot.x0()) * cand1->px() + (cand1->vy() - beamSpot.y0()) * cand1->py()) /
cand1->pt() * cand1->pz() / cand1->pt()) > max_Dz_)
continue;
// Pt threshold cut
double pt1 = cand1->pt();
// double err1 = tk1->error(0);
// double abspar1 = fabs(tk1->parameter(0));
double ptLx1 = pt1;
// Don't convert to 90% efficiency threshold
LogDebug("HLTMuonTrimuonL3Filter") << " ... 1st muon in loop, pt1= " << pt1 << ", ptLx1= " << ptLx1;
auto L2toL3s_it2 = L2toL3s_it1;
L2toL3s_it2++;
for (; L2toL3s_it2 != L2toL3s_end; ++L2toL3s_it2) {
if (!triggeredByLevel2(L2toL3s_it2->first, vl2cands))
continue;
//loop over the L3Tk reconstructed for this L2.
unsigned int iTk2 = 0;
unsigned int maxItk2 = L2toL3s_it2->second.size();
for (; iTk2 != maxItk2; iTk2++) {
RecoChargedCandidateRef& cand2 = L2toL3s_it2->second[iTk2];
TrackRef tk2 = cand2->get<TrackRef>();
// eta cut
LogDebug("HLTMuonTrimuonL3Filter") << " 2nd muon in loop: q*pt= " << tk2->charge() * tk2->pt() << " ("
<< cand2->charge() * cand2->pt() << ") "
<< ", eta= " << tk2->eta() << " (" << cand2->eta() << ") "
<< ", hits= " << tk2->numberOfValidHits() << ", d0= " << tk2->d0();
if (fabs(cand2->eta()) > max_Eta_)
continue;
// cut on number of hits
if (tk2->numberOfValidHits() < min_Nhits_)
continue;
//dr cut
// if (fabs(tk2->d0())>max_Dr_) continue;
if (fabs((-(cand2->vx() - beamSpot.x0()) * cand2->py() + (cand2->vy() - beamSpot.y0()) * cand2->px()) /
cand2->pt()) > max_Dr_)
continue;
//dz cut
if (fabs((cand2->vz() - beamSpot.z0()) -
((cand2->vx() - beamSpot.x0()) * cand2->px() + (cand2->vy() - beamSpot.y0()) * cand2->py()) /
cand2->pt() * cand2->pz() / cand2->pt()) > max_Dz_)
continue;
// Pt threshold cut
double pt2 = cand2->pt();
// double err2 = tk2->error(0);
// double abspar2 = fabs(tk2->parameter(0));
double ptLx2 = pt2;
// Don't convert to 90% efficiency threshold
LogDebug("HLTMuonTrimuonL3Filter") << " ... 2nd muon in loop, pt2= " << pt2 << ", ptLx2= " << ptLx2;
auto L2toL3s_it3 = L2toL3s_it2;
L2toL3s_it3++;
for (; L2toL3s_it3 != L2toL3s_end; ++L2toL3s_it3) {
if (!triggeredByLevel2(L2toL3s_it3->first, vl2cands))
continue;
//loop over the L3Tk reconstructed for this L2.
unsigned int iTk3 = 0;
unsigned int maxItk3 = L2toL3s_it3->second.size();
for (; iTk3 != maxItk3; iTk3++) {
RecoChargedCandidateRef& cand3 = L2toL3s_it3->second[iTk3];
TrackRef tk3 = cand3->get<TrackRef>();
// eta cut
LogDebug("HLTMuonTrimuonL3Filter") << " 3rd muon in loop: q*pt= " << tk3->charge() * tk3->pt() << " ("
<< cand3->charge() * cand3->pt() << ") "
<< ", eta= " << tk3->eta() << " (" << cand3->eta() << ") "
<< ", hits= " << tk3->numberOfValidHits();
if (fabs(cand3->eta()) > max_Eta_)
continue;
// cut on number of hits
if (tk3->numberOfValidHits() < min_Nhits_)
continue;
//dr cut
// if (fabs(tk1->d0())>max_Dr_) continue;
if (fabs((-(cand3->vx() - beamSpot.x0()) * cand3->py() + (cand3->vy() - beamSpot.y0()) * cand3->px()) /
cand3->pt()) > max_Dr_)
continue;
//dz cut
if (fabs((cand3->vz() - beamSpot.z0()) -
((cand3->vx() - beamSpot.x0()) * cand3->px() + (cand3->vy() - beamSpot.y0()) * cand3->py()) /
cand3->pt() * cand3->pz() / cand3->pt()) > max_Dz_)
continue;
// Pt threshold cut
double pt3 = cand3->pt();
// double err3 = tk3->error(0);
// double abspar3 = fabs(tk3->parameter(0));
double ptLx3 = pt3;
// Don't convert to 90% efficiency threshold
LogDebug("HLTMuonTrimuonL3Filter") << " ... 3rd muon in loop, pt3= " << pt3 << ", ptLx3= " << ptLx3;
if (ptLx1 > ptLx2 && ptLx1 > ptLx3 && ptLx1 < min_PtMax_)
continue;
else if (ptLx2 > ptLx1 && ptLx2 > ptLx3 && ptLx2 < min_PtMax_)
continue;
else if (ptLx3 < ptLx2 && ptLx3 > ptLx1 && ptLx3 < min_PtMax_)
continue;
if (ptLx1 < ptLx2 && ptLx1 < ptLx3 && ptLx1 < min_PtMin_)
continue;
else if (ptLx2 < ptLx1 && ptLx2 < ptLx3 && ptLx2 < min_PtMin_)
continue;
else if (ptLx3 < ptLx2 && ptLx3 < ptLx1 && ptLx3 < min_PtMin_)
continue;
if (chargeOpt_ > 0) {
if (abs(cand1->charge() + cand2->charge() + cand3->charge()) != chargeOpt_)
continue;
}
// Acoplanarity
double acop = fabs(cand1->phi() - cand2->phi());
if (acop > M_PI)
acop = 2 * M_PI - acop;
acop = M_PI - acop;
LogDebug("HLTMuonTrimuonL3Filter") << " ... 1-2 acop= " << acop;
if (acop < min_Acop_)
continue;
if (acop > max_Acop_)
continue;
acop = fabs(cand1->phi() - cand3->phi());
if (acop > M_PI)
acop = 2 * M_PI - acop;
acop = M_PI - acop;
LogDebug("HLTMuonTrimuonL3Filter") << " ... 1-3 acop= " << acop;
if (acop < min_Acop_)
continue;
if (acop > max_Acop_)
continue;
acop = fabs(cand3->phi() - cand2->phi());
if (acop > M_PI)
acop = 2 * M_PI - acop;
acop = M_PI - acop;
LogDebug("HLTMuonTrimuonL3Filter") << " ... 3-2 acop= " << acop;
if (acop < min_Acop_)
continue;
if (acop > max_Acop_)
continue;
// Pt balance
double ptbalance = fabs(cand1->pt() - cand2->pt());
if (ptbalance < min_PtBalance_)
continue;
if (ptbalance > max_PtBalance_)
continue;
ptbalance = fabs(cand1->pt() - cand3->pt());
if (ptbalance < min_PtBalance_)
continue;
if (ptbalance > max_PtBalance_)
continue;
ptbalance = fabs(cand3->pt() - cand2->pt());
if (ptbalance < min_PtBalance_)
continue;
if (ptbalance > max_PtBalance_)
continue;
// Combined trimuon system
e1 = sqrt(cand1->momentum().Mag2() + MuMass2);
e2 = sqrt(cand2->momentum().Mag2() + MuMass2);
e3 = sqrt(cand3->momentum().Mag2() + MuMass2);
p1 = Particle::LorentzVector(cand1->px(), cand1->py(), cand1->pz(), e1);
p2 = Particle::LorentzVector(cand2->px(), cand2->py(), cand2->pz(), e2);
p3 = Particle::LorentzVector(cand3->px(), cand3->py(), cand3->pz(), e3);
p = p1 + p2 + p3;
double pt123 = p.pt();
LogDebug("HLTMuonTrimuonL3Filter") << " ... 1-2 pt123= " << pt123;
if (pt123 < min_PtTriplet_)
continue;
double invmass = abs(p.mass());
// if (invmass>0) invmass = sqrt(invmass); else invmass = 0;
LogDebug("HLTMuonTrimuonL3Filter") << " ... 1-2 invmass= " << invmass;
if (invmass < min_InvMass_)
continue;
if (invmass > max_InvMass_)
continue;
// Delta Z between the two muons
//double DeltaZMuMu = fabs(tk2->dz(beamSpot.position())-tk1->dz(beamSpot.position()));
//if ( DeltaZMuMu > max_DzMuMu_) continue;
// DCA between the three muons
TransientTrack mu1TT(*tk1, &(*bFieldHandle));
TransientTrack mu2TT(*tk2, &(*bFieldHandle));
TransientTrack mu3TT(*tk3, &(*bFieldHandle));
TrajectoryStateClosestToPoint mu1TS = mu1TT.impactPointTSCP();
TrajectoryStateClosestToPoint mu2TS = mu2TT.impactPointTSCP();
TrajectoryStateClosestToPoint mu3TS = mu3TT.impactPointTSCP();
if (mu1TS.isValid() && mu2TS.isValid() && mu3TS.isValid()) {
ClosestApproachInRPhi cApp;
cApp.calculate(mu1TS.theState(), mu2TS.theState());
if (!cApp.status() || cApp.distance() > max_DCAMuMu_)
continue;
cApp.calculate(mu1TS.theState(), mu3TS.theState());
if (!cApp.status() || cApp.distance() > max_DCAMuMu_)
continue;
cApp.calculate(mu3TS.theState(), mu2TS.theState());
if (!cApp.status() || cApp.distance() > max_DCAMuMu_)
continue;
}
// Max dimuon |rapidity|
double rapidity = fabs(p.Rapidity());
if (rapidity > max_YTriplet_)
continue;
// Add this triplet
n++;
LogDebug("HLTMuonTrimuonL3Filter")
<< " Track1 passing filter: pt= " << cand1->pt() << ", eta: " << cand1->eta();
LogDebug("HLTMuonTrimuonL3Filter")
<< " Track2 passing filter: pt= " << cand2->pt() << ", eta: " << cand2->eta();
LogDebug("HLTMuonTrimuonL3Filter")
<< " Track2 passing filter: pt= " << cand3->pt() << ", eta: " << cand3->eta();
LogDebug("HLTMuonTrimuonL3Filter") << " Invmass= " << invmass;
bool i1done = false;
bool i2done = false;
bool i3done = false;
vector<RecoChargedCandidateRef> vref;
filterproduct.getObjects(TriggerMuon, vref);
for (auto& i : vref) {
RecoChargedCandidateRef candref = RecoChargedCandidateRef(i);
TrackRef tktmp = candref->get<TrackRef>();
if (tktmp == tk1) {
i1done = true;
} else if (tktmp == tk2) {
i2done = true;
} else if (tktmp == tk3) {
i3done = true;
}
if (i1done && i2done && i3done)
break;
}
if (!i1done) {
filterproduct.addObject(TriggerMuon, cand1);
}
if (!i2done) {
filterproduct.addObject(TriggerMuon, cand2);
}
if (!i3done) {
filterproduct.addObject(TriggerMuon, cand3);
}
//break anyway since a L3 track triplet has been found matching the criteria
thisL3Index1isDone = true;
atLeastOneTriplet = true;
break;
} //loop on the track of the third L2
//break the loop if fast accept.
if (atLeastOneTriplet && fast_Accept_)
break;
} //loop on the third L2
} //loop on the track of the second L2
//break the loop if fast accept.
if (atLeastOneTriplet && fast_Accept_)
break;
} //loop on the second L2
//break the loop if fast accept.
if (atLeastOneTriplet && fast_Accept_)
break;
if (thisL3Index1isDone)
break;
} //loop on tracks for first L2
//break the loop if fast accept.
if (atLeastOneTriplet && fast_Accept_)
break;
} //loop on the first L2
// filter decision
const bool accept(n >= 1);
LogDebug("HLTMuonTrimuonL3Filter") << " >>>>> Result of HLTMuonTrimuonL3Filter is " << accept
<< ", number of muon triplets passing thresholds= " << n;
return accept;
}
bool HLTMuonTrimuonL3Filter::triggeredByLevel2(const TrackRef& staTrack, vector<RecoChargedCandidateRef>& vcands) {
bool ok = false;
for (auto& vcand : vcands) {
if (vcand->get<TrackRef>() == staTrack) {
ok = true;
LogDebug("HLTMuonL3PreFilter") << "The L2 track triggered";
break;
}
}
return ok;
}
// declare this class as a framework plugin
#include "FWCore/Framework/interface/MakerMacros.h"
DEFINE_FWK_MODULE(HLTMuonTrimuonL3Filter);
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