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/** \class HLTMuonDimuonL2Filter
*
* See header file for documentation
*
* \author J. Alcaraz, P. Garcia, M.Vander Donckt
*
*/
#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/TrajectorySeed/interface/TrajectorySeed.h"
#include "DataFormats/MuonSeed/interface/L2MuonTrajectorySeed.h"
#include "DataFormats/MuonSeed/interface/L2MuonTrajectorySeedCollection.h"
#include "DataFormats/L1Trigger/interface/L1MuonParticleFwd.h"
#include "DataFormats/L1Trigger/interface/L1MuonParticle.h"
#include "HLTMuonDimuonL2Filter.h"
#include "HLTMuonL2ToL1Map.h"
#include "DataFormats/BeamSpot/interface/BeamSpot.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
using namespace edm;
using namespace std;
using namespace reco;
using namespace trigger;
using namespace l1extra;
//
// constructors and destructor
//
HLTMuonDimuonL2Filter::HLTMuonDimuonL2Filter(const edm::ParameterSet& iConfig)
: HLTFilter(iConfig),
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_)),
seedMapTag_(iConfig.getParameter<InputTag>("SeedMapTag")),
seedMapToken_(consumes<SeedMap>(seedMapTag_)),
fast_Accept_(iConfig.getParameter<bool>("FastAccept")),
max_Eta_(iConfig.getParameter<double>("MaxEta")),
min_Nhits_(iConfig.getParameter<int>("MinNhits")),
min_Nstations_(iConfig.getParameter<int>("MinNstations")),
min_Nchambers_(iConfig.getParameter<int>("MinNchambers")),
max_Dr_(iConfig.getParameter<double>("MaxDr")),
max_Dz_(iConfig.getParameter<double>("MaxDz")),
chargeOpt_(iConfig.getParameter<int>("ChargeOpt")),
min_PtPair_(iConfig.getParameter<double>("MinPtPair")),
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_Angle_(iConfig.getParameter<double>("MinAngle")),
max_Angle_(iConfig.getParameter<double>("MaxAngle")),
min_PtBalance_(iConfig.getParameter<double>("MinPtBalance")),
max_PtBalance_(iConfig.getParameter<double>("MaxPtBalance")),
nsigma_Pt_(iConfig.getParameter<double>("NSigmaPt")) {
LogDebug("HLTMuonDimuonL2Filter")
<< " CandTag/MinN/MaxEta/MinNhits/MinNstations/MinNchambers/MaxDr/MaxDz/MinPt1/MinPt2/MinInvMass/MaxInvMass/"
"MinAcop/MaxAcop/MinAngle/MaxAngle/MinPtBalance/MaxPtBalance/NSigmaPt : "
<< candTag_.encode() << " " << fast_Accept_ << " " << max_Eta_ << " " << min_Nhits_ << " " << min_Nstations_
<< " " << min_Nchambers_ << " " << max_Dr_ << " " << max_Dz_ << " " << chargeOpt_ << " " << min_PtPair_ << " "
<< min_PtMax_ << " " << min_PtMin_ << " " << min_InvMass_ << " " << max_InvMass_ << " " << min_Acop_ << " "
<< max_Acop_ << " " << min_Angle_ << " " << max_Angle_ << " " << min_PtBalance_ << " " << max_PtBalance_ << " "
<< nsigma_Pt_;
}
HLTMuonDimuonL2Filter::~HLTMuonDimuonL2Filter() = default;
//
// member functions
//
void HLTMuonDimuonL2Filter::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
edm::ParameterSetDescription desc;
makeHLTFilterDescription(desc);
desc.add<edm::InputTag>("BeamSpotTag", edm::InputTag("hltOfflineBeamSpot"));
desc.add<edm::InputTag>("CandTag", edm::InputTag("hltL2MuonCandidates"));
desc.add<edm::InputTag>("PreviousCandTag", edm::InputTag(""));
desc.add<edm::InputTag>("SeedMapTag", edm::InputTag("hltL2Muons"));
desc.add<bool>("FastAccept", false);
desc.add<double>("MaxEta", 2.5);
desc.add<int>("MinNhits", 0);
desc.add<int>("MinNstations", 0);
desc.add<int>("MinNchambers", 2);
desc.add<double>("MaxDr", 100.0);
desc.add<double>("MaxDz", 9999.0);
desc.add<int>("ChargeOpt", 0);
desc.add<double>("MinPtPair", 0.0);
desc.add<double>("MinPtMax", 3.0);
desc.add<double>("MinPtMin", 3.0);
desc.add<double>("MinInvMass", 1.6);
desc.add<double>("MaxInvMass", 5.6);
desc.add<double>("MinAcop", -1.0);
desc.add<double>("MaxAcop", 3.15);
desc.add<double>("MinAngle", -999.0);
desc.add<double>("MaxAngle", 2.5);
desc.add<double>("MinPtBalance", -1.0);
desc.add<double>("MaxPtBalance", 999999.0);
desc.add<double>("NSigmaPt", 0.0);
descriptions.add("hltMuonDimuonL2Filter", desc);
}
// ------------ method called to produce the data ------------
bool HLTMuonDimuonL2Filter::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.
// Ref to Candidate object to be recorded in filter object
RecoChargedCandidateRef ref1;
RecoChargedCandidateRef ref2;
// get hold of trks
Handle<RecoChargedCandidateCollection> mucands;
iEvent.getByToken(candToken_, mucands);
if (saveTags())
filterproduct.addCollectionTag(candTag_);
BeamSpot beamSpot;
Handle<BeamSpot> recoBeamSpotHandle;
iEvent.getByToken(beamspotToken_, recoBeamSpotHandle);
beamSpot = *recoBeamSpotHandle;
// get the L2 to L1 map object for this event
HLTMuonL2ToL1Map mapL2ToL1(previousCandToken_, seedMapToken_, iEvent);
// look at all mucands, check cuts and add to filter object
int n = 0;
double e1, e2;
Particle::LorentzVector p, p1, p2;
RecoChargedCandidateCollection::const_iterator cand1;
RecoChargedCandidateCollection::const_iterator cand2;
for (cand1 = mucands->begin(); cand1 != mucands->end(); cand1++) {
TrackRef tk1 = cand1->get<TrackRef>();
// eta cut
LogDebug("HLTMuonDimuonL2Filter") << " 1st muon in loop: q*pt= " << tk1->charge() * tk1->pt()
<< ", eta= " << tk1->eta() << ", hits= " << tk1->numberOfValidHits();
// find the L1 Particle corresponding to the L2 Track
if (!mapL2ToL1.isTriggeredByL1(tk1))
continue;
if (fabs(tk1->eta()) > max_Eta_)
continue;
// cut on number of hits
if (tk1->numberOfValidHits() < min_Nhits_)
continue;
// number of stations
if (tk1->hitPattern().muonStationsWithAnyHits() < min_Nstations_)
continue;
// number of chambers
if (tk1->hitPattern().dtStationsWithAnyHits() + tk1->hitPattern().cscStationsWithAnyHits() < min_Nchambers_)
continue;
//dr cut
//if (fabs(tk1->d0())>max_Dr_) continue;
if (fabs(tk1->dxy(beamSpot.position())) > max_Dr_)
continue;
//dz cut
if (fabs(tk1->dz()) > max_Dz_)
continue;
// Pt threshold cut
double pt1 = tk1->pt();
double err1 = tk1->error(0);
double abspar1 = fabs(tk1->parameter(0));
double ptLx1 = pt1;
// convert 50% efficiency threshold to 90% efficiency threshold
if (abspar1 > 0)
ptLx1 += nsigma_Pt_ * err1 / abspar1 * pt1;
LogDebug("HLTMuonDimuonL2Filter") << " ... 1st muon in loop, pt1= " << pt1 << ", ptLx1= " << ptLx1;
cand2 = cand1;
cand2++;
for (; cand2 != mucands->end(); cand2++) {
TrackRef tk2 = cand2->get<TrackRef>();
// eta cut
LogDebug("HLTMuonDimuonL2Filter") << " 2nd muon in loop: q*pt= " << tk2->charge() * tk2->pt()
<< ", eta= " << tk2->eta() << ", hits= " << tk2->numberOfValidHits()
<< ", d0= " << tk2->d0();
if (!mapL2ToL1.isTriggeredByL1(tk2))
continue;
if (fabs(tk2->eta()) > max_Eta_)
continue;
// cut on number of hits
if (tk2->numberOfValidHits() < min_Nhits_)
continue;
// number of stations
if (tk2->hitPattern().muonStationsWithAnyHits() < min_Nstations_)
continue;
// number of chambers
if (tk2->hitPattern().dtStationsWithAnyHits() + tk2->hitPattern().cscStationsWithAnyHits() < min_Nchambers_)
continue;
//dr cut
//if (fabs(tk2->d0())>max_Dr_) continue;
if (fabs(tk2->dxy(beamSpot.position())) > max_Dr_)
continue;
//dz cut
if (fabs(tk2->dz()) > max_Dz_)
continue;
// Pt threshold cut
double pt2 = tk2->pt();
double err2 = tk2->error(0);
double abspar2 = fabs(tk2->parameter(0));
double ptLx2 = pt2;
// convert 50% efficiency threshold to 90% efficiency threshold
if (abspar2 > 0)
ptLx2 += nsigma_Pt_ * err2 / abspar2 * pt2;
LogDebug("HLTMuonDimuonL2Filter") << " ... 2nd muon in loop, pt2= " << pt2 << ", ptLx2= " << ptLx2;
if (ptLx1 > ptLx2) {
if (ptLx1 < min_PtMax_)
continue;
if (ptLx2 < min_PtMin_)
continue;
} else {
if (ptLx2 < min_PtMax_)
continue;
if (ptLx1 < min_PtMin_)
continue;
}
if (chargeOpt_ < 0) {
if (tk1->charge() * tk2->charge() > 0)
continue;
} else if (chargeOpt_ > 0) {
if (tk1->charge() * tk2->charge() < 0)
continue;
}
// Acoplanarity
double acop = fabs(tk1->phi() - tk2->phi());
if (acop > M_PI)
acop = 2 * M_PI - acop;
acop = M_PI - acop;
LogDebug("HLTMuonDimuonL2Filter") << " ... 1-2 acop= " << acop;
if (acop < min_Acop_)
continue;
if (acop > max_Acop_)
continue;
// 3D angle
double angle =
acos((tk1->px() * tk2->px() + tk1->py() * tk2->py() + tk1->pz() * tk2->pz()) / (tk1->p() * tk2->p()));
LogDebug("HLTMuonDimuonL2Filter") << " ... 1-2 angle= " << angle;
if (angle < min_Angle_)
continue;
if (angle > max_Angle_)
continue;
// Pt balance
double ptbalance = fabs(tk1->pt() - tk2->pt());
if (ptbalance < min_PtBalance_)
continue;
if (ptbalance > max_PtBalance_)
continue;
// Combined dimuon system
e1 = sqrt(tk1->momentum().Mag2() + MuMass2);
e2 = sqrt(tk2->momentum().Mag2() + MuMass2);
p1 = Particle::LorentzVector(tk1->px(), tk1->py(), tk1->pz(), e1);
p2 = Particle::LorentzVector(tk2->px(), tk2->py(), tk2->pz(), e2);
p = p1 + p2;
double pt12 = p.pt();
LogDebug("HLTMuonDimuonL2Filter") << " ... 1-2 pt12= " << pt12;
if (pt12 < min_PtPair_)
continue;
double invmass = abs(p.mass());
// if (invmass>0) invmass = sqrt(invmass); else invmass = 0;
LogDebug("HLTMuonDimuonL2Filter") << " ... 1-2 invmass= " << invmass;
if (invmass < min_InvMass_)
continue;
if (invmass > max_InvMass_)
continue;
// Add this pair
n++;
LogDebug("HLTMuonDimuonL2Filter") << " Track1 passing filter: pt= " << tk1->pt() << ", eta: " << tk1->eta();
LogDebug("HLTMuonDimuonL2Filter") << " Track2 passing filter: pt= " << tk2->pt() << ", eta: " << tk2->eta();
LogDebug("HLTMuonDimuonL2Filter") << " Invmass= " << invmass;
bool i1done = false;
bool i2done = 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;
}
if (i1done && i2done)
break;
}
if (!i1done) {
ref1 = RecoChargedCandidateRef(Ref<RecoChargedCandidateCollection>(mucands, distance(mucands->begin(), cand1)));
filterproduct.addObject(TriggerMuon, ref1);
}
if (!i2done) {
ref2 = RecoChargedCandidateRef(Ref<RecoChargedCandidateCollection>(mucands, distance(mucands->begin(), cand2)));
filterproduct.addObject(TriggerMuon, ref2);
}
if (fast_Accept_)
break;
}
}
// filter decision
const bool accept(n >= 1);
LogDebug("HLTMuonDimuonL2Filter") << " >>>>> Result of HLTMuonDimuonL2Filter is " << accept
<< ", number of muon pairs passing thresholds= " << n;
return accept;
}
// declare this class as a framework plugin
#include "FWCore/Framework/interface/MakerMacros.h"
DEFINE_FWK_MODULE(HLTMuonDimuonL2Filter);
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