DimuonStatistics.cc

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#include "FWCore/Framework/interface/EDAnalyzer.h"
#include "FWCore/Utilities/interface/InputTag.h"
#include "DataFormats/Candidate/interface/Candidate.h"
#include "DataFormats/Candidate/interface/CandidateFwd.h"
#include <iostream>
 
class DimuonStatistics : public edm::EDAnalyzer {
public:
  DimuonStatistics(const edm::ParameterSet& cfg);
  void analyze(const edm::Event&, const edm::EventSetup&) override;
  void endJob() override;
 
private:
  edm::InputTag src_;
  edm::EDGetTokenT<reco::CandidateView> srcToken_;
  std::vector<unsigned int> matched_, unMatched_;
  double ptMin_, massMin_, massMax_, etaMin_, etaMax_, trkIso_;
};
 
#include "DataFormats/HepMCCandidate/interface/GenParticle.h"
#include "DataFormats/HepMCCandidate/interface/GenParticleFwd.h"
#include "FWCore/Framework/interface/Event.h"
#include "DataFormats/Common/interface/Handle.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "DataFormats/PatCandidates/interface/Muon.h"
#include "DataFormats/PatCandidates/interface/GenericParticle.h"
using namespace std;
using namespace reco;
using namespace edm;
const unsigned int maxEntries = 10;
 
DimuonStatistics::DimuonStatistics(const edm::ParameterSet& cfg)
    : src_(cfg.getParameter<InputTag>("src")),
      srcToken_(consumes<CandidateView>(src_)),
      matched_(maxEntries + 1, 0),
      unMatched_(maxEntries + 1, 0),
      ptMin_(cfg.getUntrackedParameter<double>("ptMin")),
      massMin_(cfg.getUntrackedParameter<double>("massMin")),
      massMax_(cfg.getUntrackedParameter<double>("massMax")),
      etaMin_(cfg.getUntrackedParameter<double>("etaMin")),
      etaMax_(cfg.getUntrackedParameter<double>("etaMax")),
      trkIso_(cfg.getUntrackedParameter<double>("trkIso")) {}
 
void DimuonStatistics::endJob() {
  cout << src_.encode() << endl;
  cout << " == Matched == " << endl;
  for (unsigned int i = 0; i <= maxEntries; ++i) {
    cout << i << ": " << matched_[i];
    if (i < maxEntries)
      cout << ", ";
  }
  cout << endl;
  cout << " == unMatched == " << endl;
  for (unsigned int i = 0; i <= maxEntries; ++i) {
    cout << i << ": " << unMatched_[i];
    if (i < maxEntries)
      cout << ", ";
  }
  cout << endl;
}
 
void DimuonStatistics::analyze(const edm::Event& evt, const edm::EventSetup&) {
  Handle<CandidateView> src;
  evt.getByToken(srcToken_, src);
  double trackIso1 = -1;
  double trackIso2 = -1;
  int j = 0;
  unsigned int matched = 0, unMatched = 0;
  cout << ">> entries in " << src_ << ": " << src->size() << endl;
  for (CandidateView::const_iterator i = src->begin(); i != src->end(); ++i) {
    j++;
    const Candidate* dau1 = i->daughter(0);
    const Candidate* dau2 = i->daughter(1);
    if (dau1 == nullptr || dau2 == nullptr)
      throw Exception(errors::InvalidReference) << "one of the two daughter does not exist\n";
    const Candidate* c1 = dau1->masterClone().get();
    GenParticleRef mc1;
    const pat::Muon* mu1 = dynamic_cast<const pat::Muon*>(c1);
    if (mu1 != nullptr) {
      mc1 = mu1->genParticleRef();
      //     if (mc1.isNonnull()) cout << "DimuonStatistics> genParticleRef1 " << mc1->pdgId() << endl;
      trackIso1 = mu1->trackIso();
    } else {
      const pat::GenericParticle* gp1 = dynamic_cast<const pat::GenericParticle*>(c1);
      if (gp1 == nullptr)
        throw Exception(errors::InvalidReference)
            << "first of two daughter is neither a pat::Muon not pat::GenericParticle\n";
      mc1 = gp1->genParticleRef();
    }
    const Candidate* c2 = dau2->masterClone().get();
    GenParticleRef mc2;
    const pat::Muon* mu2 = dynamic_cast<const pat::Muon*>(c2);
    if (mu2 != nullptr) {
      mc2 = mu2->genParticleRef();
      //      if (mc2.isNonnull()) cout << "DimuonStatistics> genParticleRef2 " << mc2->pdgId() << endl;
      trackIso2 = mu2->trackIso();
    } else {
      const pat::GenericParticle* gp2 = dynamic_cast<const pat::GenericParticle*>(c2);
      if (gp2 == nullptr)
        throw Exception(errors::InvalidReference)
            << "first of two daughter is neither a pat::Muon not pat::GenericParticle\n";
      mc2 = gp2->genParticleRef();
    }
    GenParticleRef dimuonMatch;
    if (mc1.isNonnull() && mc2.isNonnull()) {
      cout << "DimuonStatistics> mc1: " << mc1->pdgId() << ", mc2: " << mc2->pdgId() << endl;
      int k = 0;
      do {
        k++;
        mc1 = mc1->numberOfMothers() > 0 ? mc1->motherRef() : GenParticleRef();
        mc2 = mc2->numberOfMothers() > 0 ? mc2->motherRef() : GenParticleRef();
        //  cout << "DimuonStatistics> do loop: " << k << "  id1 " << mc1->pdgId() << "    id2 " << mc2->pdgId() << endl;
      } while (mc1 != mc2 && mc1.isNonnull() && mc2.isNonnull());
      if (mc1.isNonnull() && mc2.isNonnull() && mc1->pdgId() == 23) {
        dimuonMatch = mc1;
      }
    }
    //    cout << "DimuonMatcher> dimuonMatch " << dimuonMatch.isNonnull() << endl;
    if ((fabs(dau1->eta()) > etaMin_ && fabs(dau1->eta()) < etaMax_) && dau1->pt() > ptMin_ &&
        ((fabs(dau2->eta()) > etaMin_) && (fabs(dau2->eta()) < etaMax_)) && dau2->pt() > ptMin_ &&
        trackIso1 < trkIso_ && trackIso2 < trkIso_ && i->mass() > massMin_ && i->mass() < massMax_) {
      cout << "dimuon mass " << i->mass() << endl;
      if (dimuonMatch.isNonnull())
        ++matched;
      else
        ++unMatched;
    }
  }
  cout << "matched: " << matched << ", unmatched: " << unMatched << endl;
 
  if (matched > maxEntries)
    matched = maxEntries;
  if (unMatched > maxEntries)
    unMatched = maxEntries;
  ++matched_[matched];
  ++unMatched_[unMatched];
}
 
#include "FWCore/Framework/interface/MakerMacros.h"
 
DEFINE_FWK_MODULE(DimuonStatistics);