ISRGammaWeightProducer Class Reference

Inheritance diagram for ISRGammaWeightProducer:

Public Member Functions
virtual void	beginJob () override
virtual void	endJob () override
	ISRGammaWeightProducer (const edm::ParameterSet &)
virtual void	produce (edm::Event &, const edm::EventSetup &) override
	~ISRGammaWeightProducer ()
Public Member Functions inherited from edm::EDProducer
	EDProducer ()
ModuleDescription const &	moduleDescription () const
virtual	~EDProducer ()
Public Member Functions inherited from edm::ProducerBase
	ProducerBase ()
void	registerProducts (ProducerBase *, ProductRegistry *, ModuleDescription const &)
std::function< void(BranchDescription const &)>	registrationCallback () const
	used by the fwk to register list of products More...
virtual	~ProducerBase ()
Public Member Functions inherited from edm::EDConsumerBase
	EDConsumerBase ()
ProductHolderIndexAndSkipBit	indexFrom (EDGetToken, BranchType, TypeID const &) const
void	itemsMayGet (BranchType, std::vector< ProductHolderIndexAndSkipBit > &) const
void	itemsToGet (BranchType, std::vector< ProductHolderIndexAndSkipBit > &) const
std::vector < ProductHolderIndexAndSkipBit > const &	itemsToGetFromEvent () const
void	labelsForToken (EDGetToken iToken, Labels &oLabels) const
void	modulesDependentUpon (const std::string &iProcessName, std::vector< const char * > &oModuleLabels) const
bool	registeredToConsume (ProductHolderIndex, bool, BranchType) const
bool	registeredToConsumeMany (TypeID const &, BranchType) const
void	updateLookup (BranchType iBranchType, ProductHolderIndexHelper const &)
virtual	~EDConsumerBase ()

Private Attributes
edm::EDGetTokenT < reco::GenParticleCollection >	genToken_
std::vector< double >	isrBinEdges_
std::vector< double >	ptWeights_

Additional Inherited Members
Public Types inherited from edm::EDProducer
typedef EDProducer	ModuleType
Public Types inherited from edm::ProducerBase
typedef ProductRegistryHelper::TypeLabelList	TypeLabelList
Static Public Member Functions inherited from edm::EDProducer
static const std::string &	baseType ()
static void	fillDescriptions (ConfigurationDescriptions &descriptions)
static void	prevalidate (ConfigurationDescriptions &descriptions)
Protected Member Functions inherited from edm::ProducerBase
void	callWhenNewProductsRegistered (std::function< void(BranchDescription const &)> const &func)
Protected Member Functions inherited from edm::EDConsumerBase
template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	consumes (edm::InputTag const &tag)
EDGetToken	consumes (const TypeToGet &id, edm::InputTag const &tag)
template<BranchType B>
EDGetToken	consumes (TypeToGet const &id, edm::InputTag const &tag)
ConsumesCollector	consumesCollector ()
	Use a ConsumesCollector to gather consumes information from helper functions. More...
template<typename ProductType , BranchType B = InEvent>
void	consumesMany ()
void	consumesMany (const TypeToGet &id)
template<BranchType B>
void	consumesMany (const TypeToGet &id)
template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	mayConsume (edm::InputTag const &tag)
EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)
template<BranchType B>
EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)

Detailed Description

Definition at line 20 of file ISRGammaWeightProducer.cc.

Constructor & Destructor Documentation

ISRGammaWeightProducer::ISRGammaWeightProducer ( const edm::ParameterSet &  pset )

explicit

Definition at line 37 of file ISRGammaWeightProducer.cc.

References genToken_, and edm::ParameterSet::getUntrackedParameter().

                                                                          {
      genToken_ = consumes<reco::GenParticleCollection>(pset.getUntrackedParameter<edm::InputTag> ("GenTag", edm::InputTag("genParticles")));

      produces<double>();
}

ISRGammaWeightProducer::~ISRGammaWeightProducer

(

)

Definition at line 44 of file ISRGammaWeightProducer.cc.

{}

Member Function Documentation

void ISRGammaWeightProducer::beginJob ( void  )

overridevirtual

Reimplemented from edm::EDProducer.

Definition at line 47 of file ISRGammaWeightProducer.cc.

{}

void ISRGammaWeightProducer::endJob ( void  )

overridevirtual

Reimplemented from edm::EDProducer.

Definition at line 50 of file ISRGammaWeightProducer.cc.

{}

void ISRGammaWeightProducer::produce ( edm::Event &  iEvent, const edm::EventSetup &    )

overridevirtual

Implements edm::EDProducer.

Definition at line 53 of file ISRGammaWeightProducer.cc.

References funct::abs(), reco::CompositeRefCandidateT< D >::daughterRef(), genParticleCandidates2GenParticles_cfi::genParticles, genToken_, edm::Event::getByToken(), i, edm::EventBase::isRealData(), j, reco::LeafCandidate::mass(), reco::CompositeRefCandidateT< D >::motherRef(), reco::CompositeRefCandidateT< D >::numberOfDaughters(), reco::CompositeRefCandidateT< D >::numberOfMothers(), reco::LeafCandidate::p4(), reco::LeafCandidate::pdgId(), edm::Event::put(), alignCSCRings::s, reco::LeafCandidate::status(), ntuplemaker::status, edmStreamStallGrapher::t, and histoStyle::weight.

Referenced by JSONExport.JsonExport::export(), HTMLExport.HTMLExport::export(), and HTMLExport.HTMLExportStatic::export().

                                                                           {

      if (iEvent.isRealData()) return;

      edm::Handle<reco::GenParticleCollection> genParticles;
      iEvent.getByToken(genToken_, genParticles);
      unsigned int gensize = genParticles->size();

      std::auto_ptr<double> weight (new double);

      // Set a default weight to start with
      (*weight) = 1.;

      // Find the boson at the hard scattering level
      const reco::GenParticle* boson = 0;
      int parton1Key = -1;
      int parton2Key = -1;
      for (unsigned int i = 0; i<gensize; ++i) {
            const reco::GenParticle& part = (*genParticles)[i];
            int status = abs(part.status());
            if (status!=3) continue;
            if (part.numberOfMothers()!=2) continue;
            int partId = abs(part.pdgId());
            if (status==3 && (partId==23||abs(partId)==24)) {
                  boson = &(*genParticles)[i];
                  parton1Key = part.motherRef(0).key();
                  parton2Key = part.motherRef(1).key();
                  break;
            }
      }

      // Consider only photons near the hard-scattering process
      const reco::GenParticle* photon = 0;
      if (boson) {
        for (unsigned int i = 0; i<gensize; ++i) {
            photon = 0;
            const reco::GenParticle& part = (*genParticles)[i];
            int status = abs(part.status());
            if (status!=1) continue;
            int partId = abs(part.pdgId());
            if (partId!=22)  continue;
            if (part.numberOfMothers()!=1) continue;
            int keyM = part.motherRef(0).key();
            const reco::GenParticle* mother = &(*genParticles)[keyM];
            if (mother->status()!=3) continue;
            int mId = mother->pdgId();
            if (abs(mId)>6 && mId!=2212) continue;
            for (unsigned int j=0; j<mother->numberOfDaughters(); ++j){
                  int keyD = mother->daughterRef(j).key();
                  if (keyD==parton1Key || keyD==parton2Key) {
                        photon = &part;
                        break;
                  }
            }
            if (photon) break;
        }
      }

      if (boson && photon) {
            math::XYZTLorentzVector smom = boson->p4() + photon->p4();
            double s = smom.M2();
            double sqrts = smom.M();

            // Go to CM using the boost direction of the boson+photon system
            ROOT::Math::Boost cmboost(smom.BoostToCM());
            math::XYZTLorentzVector photonCM(cmboost(photon->p4()));
            double pcostheta = (  smom.x()*photonCM.x()
                               + smom.y()*photonCM.y()
                               + smom.z()*photonCM.z() ) / smom.P();

            // Determine kinematic invariants
            double t = - sqrts * (photonCM.t()-pcostheta);
            double MV = boson->mass();
            double u = MV*MV - s - t;
            (*weight) = 1. - 2*t*u/(s*s+MV*MV*MV*MV);
            //printf(">>>>>>>>> s %f t %f u %f, MV %f, weight = %f\n", s, t, u, MV, (*weight));
      }

      iEvent.put(weight);
}

Member Data Documentation

edm::EDGetTokenT<reco::GenParticleCollection> ISRGammaWeightProducer::genToken_

private

Definition at line 30 of file ISRGammaWeightProducer.cc.

Referenced by ISRGammaWeightProducer(), and produce().

std::vector<double> ISRGammaWeightProducer::isrBinEdges_

private

Definition at line 31 of file ISRGammaWeightProducer.cc.

std::vector<double> ISRGammaWeightProducer::ptWeights_

private

Definition at line 32 of file ISRGammaWeightProducer.cc.