#include <PythiaFilterGammaJetIsoPi0.h>

Inheritance diagram for PythiaFilterGammaJetIsoPi0:

Public Member Functions
virtual bool	filter (edm::Event &, const edm::EventSetup &)

	PythiaFilterGammaJetIsoPi0 (const edm::ParameterSet &)

	~PythiaFilterGammaJetIsoPi0 ()

Public Member Functions inherited from edm::EDFilter
	EDFilter ()

ModuleDescription const &	moduleDescription () const

virtual	~EDFilter ()

Public Member Functions inherited from edm::ProducerBase
void	callWhenNewProductsRegistered (std::function< void(BranchDescription const &)> const &func)

	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
std::vector< ConsumesInfo >	consumesInfo () const

	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

void	modulesWhoseProductsAreConsumed (std::vector< ModuleDescription const * > &modules, ProductRegistry const &preg, std::map< std::string, ModuleDescription const * > const &labelsToDesc, std::string const &processName) const

bool	registeredToConsume (ProductHolderIndex, bool, BranchType) const

bool	registeredToConsumeMany (TypeID const &, BranchType) const

void	updateLookup (BranchType iBranchType, ProductHolderIndexHelper const &)

virtual	~EDConsumerBase ()

Private Attributes
double	deltaEB

double	deltaEE

double	ebEtaMax

double	etaMax

double	etaMin

double	isocone

double	isodr

double	PtMax

double	PtMin

int	theNumberOfSelected

int	theNumberOfTestedEvt

edm::EDGetTokenT < edm::HepMCProduct >	token_

Additional Inherited Members
Public Types inherited from edm::EDFilter
typedef EDFilter	ModuleType

Public Types inherited from edm::ProducerBase
typedef ProductRegistryHelper::TypeLabelList	TypeLabelList

Public Types inherited from edm::EDConsumerBase
typedef ProductLabels	Labels

Static Public Member Functions inherited from edm::EDFilter
static const std::string &	baseType ()

static void	fillDescriptions (ConfigurationDescriptions &descriptions)

static void	prevalidate (ConfigurationDescriptions &)

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

PythiaFilterGammaJetIsoPi0 filter implements generator-level preselections for photon+jet like events to be used in pi0 rejection studies. Based on A. Ulyanov PythiaFilterGammaJetWithBg.h code

Author: A.Kyriakis, NCSR "Demokritos"

Definition at line 30 of file PythiaFilterGammaJetIsoPi0.h.

Constructor & Destructor Documentation

PythiaFilterGammaJetIsoPi0::PythiaFilterGammaJetIsoPi0 ( const edm::ParameterSet & iConfig )

explicit

Definition at line 40 of file PythiaFilterGammaJetIsoPi0.cc.

References gather_cfg::cout, deltaEB, deltaEE, etaMax, etaMin, isocone, isodr, PtMax, PtMin, theNumberOfSelected, and theNumberOfTestedEvt.

                                                                                      :
   token_(consumes<edm::HepMCProduct>(edm::InputTag(iConfig.getUntrackedParameter("moduleLabel",std::string("generator")),"unsmeared"))),
   etaMin(iConfig.getUntrackedParameter<double>("MinPi0Eta", 1.65)),
   PtMin(iConfig.getUntrackedParameter<double>("MinPi0Pt", 50.)),
   etaMax(iConfig.getUntrackedParameter<double>("MaxPi0Eta", 2.5)),
   PtMax(iConfig.getUntrackedParameter<double>("MaxPi0Pt", 100.)),
   isocone(iConfig.getUntrackedParameter<double>("IsoCone",0.3)),
   isodr(iConfig.getUntrackedParameter<double>("IsoDR",0.5)),
   ebEtaMax(1.479){ 
 //
   deltaEB=0.01745/2  *5; // delta_eta, delta_phi
   deltaEE=2.93/317/2 *5; // delta_x/z, delta_y/z
   theNumberOfTestedEvt = 0;
   theNumberOfSelected = 0;
 
   cout << " Cut Definition: " << endl;
   cout << " MinPi0Pt = " << PtMin << endl;
   cout << " MaxPi0Pt = " << PtMax << endl;
   cout << " MinPi0Eta = " << etaMin << endl;
   cout << " MaxPi0Eta = " << etaMax << endl;
 //
   cout << " Pi0 Isolation Cone = " << isocone << endl;
   cout << " Max dR between pi0 and Photon  = " << isodr << endl;
   cout << " 5x5 crystal cone  around pi0 axis in ECAL Barrel = " << deltaEB << endl;
   cout << " 5x5 crystal cone  around pi0 axis in ECAL Endcap = " << deltaEE << endl;
 
   theNumberOfTestedEvt = 0;
   theNumberOfSelected = 0;
 
 }

PythiaFilterGammaJetIsoPi0::~PythiaFilterGammaJetIsoPi0 ( )

Definition at line 72 of file PythiaFilterGammaJetIsoPi0.cc.

72 {}

Member Function Documentation

bool PythiaFilterGammaJetIsoPi0::filter	(	edm::Event &	iEvent,
		const edm::EventSetup &	iSetup
	)

virtual

Implements edm::EDFilter.

Definition at line 76 of file PythiaFilterGammaJetIsoPi0.cc.

References funct::abs(), gather_cfg::cout, deltaEB, deltaEE, SiPixelRawToDigiRegional_cfi::deltaPhi, reco::deltaR2(), ebEtaMax, etaMin, GenParticle::GenParticle, edm::Event::getByToken(), edm::EventSetup::getData(), i, edm::EventBase::id(), isocone, isodr, AlCaHLTBitMon_ParallelJobs::p, sysUtil::pid, EnergyCorrector::pt, PtMax, PtMin, mathSSE::sqrt(), theNumberOfSelected, theNumberOfTestedEvt, and token_.

                                                                                     {
 
   theNumberOfTestedEvt++;
   if(theNumberOfTestedEvt%1000 == 0) cout << "Number of tested events = " << theNumberOfTestedEvt <<  endl;
   
   bool accepted = false;
   Handle<edm::HepMCProduct> evt;
   iEvent.getByToken(token_, evt);
 
   const HepMC::GenEvent * myGenEvent = evt->GetEvent();
 
   list<const HepMC::GenParticle *> pi0_seeds;
 
   int pi0_id = -1;
   int particle_id = 1;
   for ( HepMC::GenEvent::particle_const_iterator p = myGenEvent->particles_begin();  
                                                     p != myGenEvent->particles_end(); ++p ) {
    
     double Particle_pt = (*p)->momentum().perp();
     double Particle_eta = (*p)->momentum().eta();
               
     if ( (*p)->pdg_id()==111) {
       
       if(Particle_pt > PtMin && Particle_pt < PtMax &&  Particle_eta < etaMax  && Particle_eta > etaMin )
       {
          pi0_id = particle_id;
          pi0_seeds.push_back(*p);
          break;
       }
     }  
     particle_id++;
   }
 
   HepMC::GenEvent::particle_const_iterator ppp = myGenEvent->particles_begin();
   for(int i=0;i<7;++i) ppp++;
   HepMC::GenParticle* particle8 = (*ppp);
 
   int photon_id = 7;
   if(particle8->pdg_id() == 22) { 
     photon_id = 8;
   }
 
   if(pi0_seeds.size() == 1) {
     double eta_photon = myGenEvent->barcode_to_particle(photon_id)->momentum().eta();
     double phi_photon = myGenEvent->barcode_to_particle(photon_id)->momentum().eta();      
     double eta_pi0 = myGenEvent->barcode_to_particle(pi0_id)->momentum().eta();
     double phi_pi0 = myGenEvent->barcode_to_particle(pi0_id)->momentum().phi();
 
     double dr_pi0_photon = sqrt(deltaR2(eta_photon, phi_photon, eta_pi0, phi_pi0)); 
 // check if pi0 comes from the jet and is far from the photon
 // ----------------------------------------------------------    
     if(dr_pi0_photon > isodr) { 
       
       bool inEB(0);
       double tgx(0);
       double tgy(0);
       if( std::abs(eta_pi0) < ebEtaMax) inEB=1;
       else{
         tgx=myGenEvent->barcode_to_particle(pi0_id)->momentum().px()/myGenEvent->barcode_to_particle(pi0_id)->momentum().pz();
         tgy=myGenEvent->barcode_to_particle(pi0_id)->momentum().py()/myGenEvent->barcode_to_particle(pi0_id)->momentum().pz();
       }
 
       double etPi0=0;
       double etPi0Charged=0;
       double etCone=0;
       double etConeCharged=0;
       double ptMaxHadron=0;
         
       for ( HepMC::GenEvent::particle_const_iterator p = myGenEvent->particles_begin();
                                                  p != myGenEvent->particles_end(); ++p ) {
     
         if ( (*p)->status()!=1 ) continue; // use only stable particles
         int pid= (*p)->pdg_id();
         int apid= std::abs(pid);
         if (apid>11 &&  apid<21) continue; //get rid of muons and neutrinos
         double eta=(*p)->momentum().eta();
         double phi=(*p)->momentum().phi();
         if ( sqrt(deltaR2(eta_pi0, phi_pi0, eta, phi)) > isocone) continue;
         double pt=(*p)->momentum().perp();
         etCone+=pt; // add the pt if particle inside the cone
     
         ESHandle<ParticleDataTable> pdt;
         iSetup.getData( pdt );
     
         int charge3 = ((pdt->particle((*p)->pdg_id()))->ID().threeCharge());
 
         if(charge3) etConeCharged+=pt;
 
       //select particles matching a crystal array centered on pi0 direction
         if(inEB) {
       if(  std::abs(eta-eta_pi0)> deltaEB ||
            std::abs(deltaPhi(phi,phi_pi0)) > deltaEB) continue;
         }
         else if( fabs((*p)->momentum().px()/(*p)->momentum().pz() - tgx) > deltaEE || 
              fabs((*p)->momentum().py()/(*p)->momentum().pz() - tgy) > deltaEE) continue;
 
         etPi0+=pt;
     
         if(charge3) etPi0Charged+=pt;
     
         if(apid>100 && apid!=310 && pt>ptMaxHadron) ptMaxHadron=pt; // 310 -> K0s
 
       } // for ( HepMC::GenEvent::particle_const_iterator
       
     //isolation cuts
 
       double iso_cut1 = 5 + etPi0/20 - etPi0*etPi0/1e4;
       double iso_cut2 = 3 + etPi0/20 - etPi0*etPi0*etPi0/1e6;
       double iso_cut3 = 4.5 + etPi0/40;
       if (etPi0>165.)
       {
         iso_cut1 = 5.+165./20.-165.*165./1e4;
         iso_cut2 = 3.+165./20.-165.*165.*165./1e6;
         iso_cut3 = 4.5+165./40.;
       }
       double iso_cut4 = 0.02; // Fraction of charged energy in the cone 2% 
 
 
       double iso_val1 = etCone - etPi0; 
       double iso_val2 = iso_val1 - (etConeCharged - etPi0Charged);
       double iso_val3 = etConeCharged/etPi0;
 
       if( iso_val1 < iso_cut1) {
         if( iso_val2 < iso_cut2) {
            if(ptMaxHadron < iso_cut3) {
              if(iso_val3 < iso_cut4) {
                accepted=true;
          } 
            } // if(ptMaxHadron < iso_cut3)
     } // if( iso_val2 < iso_cut2) 
       } // if( iso_val1 < iso_cut1)         
     } // if(dr_pi0_jet < 0.1 && deta_pi0_photon > 1)
   } //if(pi0_seeds.size() == 1) {
 
   
   if (accepted) {
     theNumberOfSelected++;
     cout << "========>  Event: " << iEvent.id() 
          << " of Proccess ID " << myGenEvent->signal_process_id()
          <<  " preselected " << endl;
     cout << " Number of preselected events: " << theNumberOfSelected << endl;
     return true; 
   }
   else return false;
 
 }