#include <TtSemiLepJetCombWMassMaxSumPt.h>

Inheritance diagram for TtSemiLepJetCombWMassMaxSumPt:

Public Member Functions
	TtSemiLepJetCombWMassMaxSumPt (const edm::ParameterSet &)
	~TtSemiLepJetCombWMassMaxSumPt ()
Private Member Functions
virtual void	beginJob ()
virtual void	endJob ()
bool	isValid (const int &idx, const edm::Handle< std::vector< pat::Jet > > &jets)
virtual void	produce (edm::Event &evt, const edm::EventSetup &setup)
Private Attributes
std::string	bTagAlgorithm_
edm::InputTag	jets_
edm::InputTag	leps_
double	maxBDiscLightJets_
int	maxNJets_
double	minBDiscBJets_
bool	useBTagging_
double	wMass_

Detailed Description

Definition at line 9 of file TtSemiLepJetCombWMassMaxSumPt.h.

Constructor & Destructor Documentation

TtSemiLepJetCombWMassMaxSumPt::TtSemiLepJetCombWMassMaxSumPt ( const edm::ParameterSet & cfg ) [explicit]

Definition at line 6 of file TtSemiLepJetCombWMassMaxSumPt.cc.

References Exception, and maxNJets_.

                                                                                      :
  jets_             (cfg.getParameter<edm::InputTag>("jets"             )),
  leps_             (cfg.getParameter<edm::InputTag>("leps"             )),
  maxNJets_         (cfg.getParameter<int>          ("maxNJets"         )),
  wMass_            (cfg.getParameter<double>       ("wMass"            )),
  useBTagging_      (cfg.getParameter<bool>         ("useBTagging"      )),
  bTagAlgorithm_    (cfg.getParameter<std::string>  ("bTagAlgorithm"    )),
  minBDiscBJets_    (cfg.getParameter<double>       ("minBDiscBJets"    )),
  maxBDiscLightJets_(cfg.getParameter<double>       ("maxBDiscLightJets"))
{
  if(maxNJets_<4 && maxNJets_!=-1)
    throw cms::Exception("WrongConfig") 
      << "Parameter maxNJets can not be set to " << maxNJets_ << ". \n"
      << "It has to be larger than 4 or can be set to -1 to take all jets.";

  produces<std::vector<std::vector<int> > >();
  produces<int>("NumberOfConsideredJets");
}

TtSemiLepJetCombWMassMaxSumPt::~TtSemiLepJetCombWMassMaxSumPt ( )

Definition at line 25 of file TtSemiLepJetCombWMassMaxSumPt.cc.

{
}

Member Function Documentation

virtual void TtSemiLepJetCombWMassMaxSumPt::beginJob ( void ) [inline, private, virtual]

Reimplemented from edm::EDProducer.

Definition at line 18 of file TtSemiLepJetCombWMassMaxSumPt.h.

{};

virtual void TtSemiLepJetCombWMassMaxSumPt::endJob ( void ) [inline, private, virtual]

Reimplemented from edm::EDProducer.

Definition at line 20 of file TtSemiLepJetCombWMassMaxSumPt.h.

{};

bool TtSemiLepJetCombWMassMaxSumPt::isValid	(	const int &	idx,
		const edm::Handle< std::vector< pat::Jet > > &	jets
	)		`[inline, private]`

Definition at line 22 of file TtSemiLepJetCombWMassMaxSumPt.h.

Referenced by produce().

{ return (0<=idx && idx<(int)jets->size()); };

void TtSemiLepJetCombWMassMaxSumPt::produce	(	edm::Event &	evt,
		const edm::EventSetup &	setup
	)		`[private, virtual]`

Implements edm::EDProducer.

Definition at line 30 of file TtSemiLepJetCombWMassMaxSumPt.cc.

References bTagAlgorithm_, edm::Event::getByLabel(), TtSemiLepDaughter::HadB, i, isValid(), fwrapper::jets, jets_, TtSemiLepDaughter::LepB, leps_, TtFullHadDaughter::LightQ, TtFullHadDaughter::LightQBar, match(), maxBDiscLightJets_, maxNJets_, minBDiscBJets_, edm::Event::put(), useBTagging_, and wMass_.

{
  std::auto_ptr<std::vector<std::vector<int> > > pOut(new std::vector<std::vector<int> >);
  std::auto_ptr<int> pJetsConsidered(new int);

  std::vector<int> match;
  for(unsigned int i = 0; i < 4; ++i) 
    match.push_back( -1 );

  // get jets
  edm::Handle< std::vector<pat::Jet> > jets;
  evt.getByLabel(jets_, jets);

  // get leptons
  edm::Handle< edm::View<reco::RecoCandidate> > leps; 
  evt.getByLabel(leps_, leps);


  // skip events without lepton candidate or less than 4 jets or no MET
  if(leps->empty() || jets->size() < 4){
    pOut->push_back( match );
    evt.put(pOut);
    *pJetsConsidered = jets->size();
    evt.put(pJetsConsidered, "NumberOfConsideredJets");
    return;
  }

  unsigned maxNJets = maxNJets_;
  if(maxNJets_ == -1 || (int)jets->size() < maxNJets_) maxNJets = jets->size();
  *pJetsConsidered = maxNJets;
  evt.put(pJetsConsidered, "NumberOfConsideredJets");

  std::vector<bool> isBJet;
  std::vector<bool> isLJet;
  int cntBJets = 0;
  if(useBTagging_) {
    for(unsigned int idx=0; idx<maxNJets; ++idx) {
      isBJet.push_back( ((*jets)[idx].bDiscriminator(bTagAlgorithm_) > minBDiscBJets_    ) );
      isLJet.push_back( ((*jets)[idx].bDiscriminator(bTagAlgorithm_) < maxBDiscLightJets_) );
      if((*jets)[idx].bDiscriminator(bTagAlgorithm_) > minBDiscBJets_    )cntBJets++;
    }
  }

  // -----------------------------------------------------
  // associate those jets that get closest to the W mass
  // with their invariant mass to the hadronic W boson
  // -----------------------------------------------------
  double wDist =-1.;
  std::vector<int> closestToWMassIndices;
  closestToWMassIndices.push_back(-1);
  closestToWMassIndices.push_back(-1);
  for(unsigned idx=0; idx<maxNJets; ++idx){
    if(useBTagging_ && (!isLJet[idx] || (cntBJets<=2 && isBJet[idx]))) continue;
    for(unsigned jdx=(idx+1); jdx<maxNJets; ++jdx){
      if(useBTagging_ && (!isLJet[jdx] || (cntBJets<=2 && isBJet[jdx]) || (cntBJets==3 && isBJet[idx] && isBJet[jdx]))) continue;
      reco::Particle::LorentzVector sum = 
        (*jets)[idx].p4()+
        (*jets)[jdx].p4();
      if( wDist<0. || wDist>fabs(sum.mass()-wMass_) ){
        wDist=fabs(sum.mass()-wMass_);
        closestToWMassIndices.clear();
        closestToWMassIndices.push_back(idx);
        closestToWMassIndices.push_back(jdx);
      }
    }
  }

  // -----------------------------------------------------
  // associate those jets with maximum pt of the vectorial 
  // sum to the hadronic decay chain
  // -----------------------------------------------------
  double maxPt=-1.;
  int hadB=-1;
  if( isValid(closestToWMassIndices[0], jets) && isValid(closestToWMassIndices[1], jets)) {
    for(unsigned idx=0; idx<maxNJets; ++idx){
      if(useBTagging_ && !isBJet[idx]) continue;
      // make sure it's not used up already from the hadronic W
      if( (int)idx!=closestToWMassIndices[0] && (int)idx!=closestToWMassIndices[1] ){
        reco::Particle::LorentzVector sum = 
          (*jets)[closestToWMassIndices[0]].p4()+
          (*jets)[closestToWMassIndices[1]].p4()+
          (*jets)[idx].p4();
        if( maxPt<0. || maxPt<sum.pt() ){
          maxPt=sum.pt();
          hadB=idx;
        }
      }
    }
  }
  
  // -----------------------------------------------------
  // associate the remaining jet with maximum pt of the   
  // vectorial sum with the leading lepton with the 
  // leptonic b quark
  // -----------------------------------------------------
  maxPt=-1.;
  int lepB=-1;
  for(unsigned idx=0; idx<maxNJets; ++idx){
    if(useBTagging_ && !isBJet[idx]) continue;
    // make sure it's not used up already from the hadronic decay chain
    if( (int)idx!=closestToWMassIndices[0] && (int)idx!=closestToWMassIndices[1] && (int)idx!=hadB) {
      reco::Particle::LorentzVector sum = 
        (*jets)[idx].p4()+(*leps)[ 0 ].p4();
      if( maxPt<0. || maxPt<sum.pt() ){
        maxPt=sum.pt();
        lepB=idx;
      }
    }
  }

  match[TtSemiLepEvtPartons::LightQ   ] = closestToWMassIndices[0];
  match[TtSemiLepEvtPartons::LightQBar] = closestToWMassIndices[1];
  match[TtSemiLepEvtPartons::HadB     ] = hadB;
  match[TtSemiLepEvtPartons::LepB     ] = lepB;

  pOut->push_back( match );
  evt.put(pOut);
}