#include <MultiParticleInConeGunProducer.h>

Inheritance diagram for edm::MultiParticleInConeGunProducer:

Public Member Functions
	MultiParticleInConeGunProducer (const ParameterSet &)

virtual	~MultiParticleInConeGunProducer ()

Public Member Functions inherited from edm::BaseFlatGunProducer
	BaseFlatGunProducer (const ParameterSet &)

void	beginRun (edm::Run &r, const edm::EventSetup &)

void	endRun (edm::Run &r, const edm::EventSetup &)

virtual	~BaseFlatGunProducer ()

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

virtual	~EDProducer ()

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

void	registerProducts (ProducerBase , ProductRegistry , ModuleDescription const &)

boost::function< void(const BranchDescription &)>	registrationCallback () const
	used by the fwk to register list of products More...

virtual	~ProducerBase ()

Protected Attributes
std::vector< int >	fInConeIds

double	fInConeMaxEta

double	fInConeMaxPhi

unsigned int	fInConeMaxTry

double	fInConeMinEta

double	fInConeMinPhi

double	fMaxDeltaR

double	fMaxMomRatio

double	fMaxPt

double	fMinDeltaR

double	fMinMomRatio

double	fMinPt

Protected Attributes inherited from edm::BaseFlatGunProducer
bool	fAddAntiParticle

HepMC::GenEvent *	fEvt

double	fMaxEta

double	fMaxPhi

double	fMinEta

double	fMinPhi

std::vector< int >	fPartIDs

ESHandle < HepPDT::ParticleDataTable >	fPDGTable

CLHEP::HepRandomEngine &	fRandomEngine

CLHEP::RandFlat *	fRandomGenerator

int	fVerbosity

Private Member Functions
virtual void	produce (Event &e, const EventSetup &es)

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

typedef WorkerT< EDProducer >	WorkerType

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::EDProducer
CurrentProcessingContext const *	currentContext () const

Protected Member Functions inherited from edm::ProducerBase
template<class TProducer , class TMethod >
void	callWhenNewProductsRegistered (TProducer *iProd, TMethod iMethod)

Detailed Description

Definition at line 15 of file MultiParticleInConeGunProducer.h.

Constructor & Destructor Documentation

MultiParticleInConeGunProducer::MultiParticleInConeGunProducer ( const ParameterSet & pset )

Definition at line 24 of file MultiParticleInConeGunProducer.cc.

References fInConeIds, fInConeMaxEta, fInConeMaxPhi, fInConeMaxTry, fInConeMinEta, fInConeMinPhi, fMaxDeltaR, fMaxMomRatio, fMaxPt, fMinDeltaR, fMinMomRatio, fMinPt, and edm::ParameterSet::getParameter().

                                                                                        : 
    BaseFlatGunProducer(pset)
 {
 
 
    ParameterSet defpset ;
    ParameterSet pgun_params = 
       pset.getParameter<ParameterSet>("PGunParameters") ;
   
    fMinPt = pgun_params.getParameter<double>("MinPt");
    fMaxPt = pgun_params.getParameter<double>("MaxPt");
 
    fInConeIds = pgun_params.getParameter< vector<int> >("InConeID");
    fMinDeltaR = pgun_params.getParameter<double>("MinDeltaR");
    fMaxDeltaR = pgun_params.getParameter<double>("MaxDeltaR");
    fMinMomRatio = pgun_params.getParameter<double>("MinMomRatio");
    fMaxMomRatio = pgun_params.getParameter<double>("MaxMomRatio");
 
    fInConeMinEta = pgun_params.getParameter<double>("InConeMinEta");
    fInConeMaxEta = pgun_params.getParameter<double>("InConeMaxEta");
    fInConeMinPhi = pgun_params.getParameter<double>("InConeMinPhi");
    fInConeMaxPhi = pgun_params.getParameter<double>("InConeMaxPhi");
    fInConeMaxTry = pgun_params.getParameter<unsigned int>("InConeMaxTry");
    
    produces<HepMCProduct>();
    produces<GenEventInfoProduct>();
 }

MultiParticleInConeGunProducer::~MultiParticleInConeGunProducer ( )

virtual

Definition at line 52 of file MultiParticleInConeGunProducer.cc.

 {
    // no need to cleanup GenEvent memory - done in HepMCProduct
 }

Member Function Documentation

void MultiParticleInConeGunProducer::produce	(	Event &	e,
		const EventSetup &	es
	)

privatevirtual

Implements edm::EDProducer.

Definition at line 57 of file MultiParticleInConeGunProducer.cc.

 {
 
    if ( fVerbosity > 0 )
    {
       cout << " MultiParticleInConeGunProducer : Begin New Event Generation" << endl ; 
    }
    // event loop (well, another step in it...)
           
    // no need to clean up GenEvent memory - done in HepMCProduct
    // 
    
    // here re-create fEvt (memory)
    //
    fEvt = new HepMC::GenEvent() ;
    
    // now actualy, cook up the event from PDGTable and gun parameters
    //
    // 1st, primary vertex
    //
    //HepMC::GenVertex* Vtx = new HepMC::GenVertex(CLHEP::HepLorentzVector(0.,0.,0.));
    HepMC::GenVertex* Vtx = new HepMC::GenVertex(HepMC::FourVector(0.,0.,0.));
 
    // loop over particles
    //
    int barcode = 1 ;
    for (unsigned int ip=0; ip<fPartIDs.size(); ++ip)
    {
 
        double pt     = fRandomGenerator->fire(fMinPt, fMaxPt) ;
        double eta    = fRandomGenerator->fire(fMinEta, fMaxEta) ;
        double phi    = fRandomGenerator->fire(fMinPhi, fMaxPhi) ;
        int PartID = fPartIDs[ip] ;
        const HepPDT::ParticleData* 
           PData = fPDGTable->particle(HepPDT::ParticleID(abs(PartID))) ;
        double mass   = PData->mass().value() ;
        double theta  = 2.*atan(exp(-eta)) ;
        double mom    = pt/sin(theta) ;
        double px     = pt*cos(phi) ;
        double py     = pt*sin(phi) ;
        double pz     = mom*cos(theta) ;
        double energy2= mom*mom + mass*mass ;
        double energy = sqrt(energy2) ; 
 
        HepMC::FourVector p(px,py,pz,energy) ;
        HepMC::GenParticle* Part = 
            new HepMC::GenParticle(p,PartID,1);
        Part->suggest_barcode( barcode ) ;
        barcode++ ;
        Vtx->add_particle_out(Part);
 
        if ( fAddAntiParticle ){}
 
        // now add the particles in the cone
        for (unsigned iPic=0; iPic!=fInConeIds.size();iPic++){
      unsigned int nTry=0;
      while(true){
        //shoot flat Deltar
        double dR = fRandomGenerator->fire(fMinDeltaR, fMaxDeltaR);
        //shoot flat eta/phi mixing
        double alpha = fRandomGenerator->fire(-3.14159265358979323846, 3.14159265358979323846);
        double dEta = dR*cos(alpha);
        double dPhi = dR*sin(alpha);
        
        /*
        //shoot Energy of associated particle     
        double energyIc = fRandomGenerator->fire(fMinEInCone, fMaxEInCone);
        if (mom2Ic>0){ momIC = sqrt(mom2Ic);}
        */
        //    get kinematics
        double etaIc = eta+dEta;
        double phiIc = phi+dPhi;
        //put it back in -Pi:Pi if necessary. multiple time might be necessary if dR > 3
        const unsigned int maxL=100;
        unsigned int iL=0;
        while(iL++<maxL){
          if (phiIc > 3.14159265358979323846) phiIc-=2*3.14159265358979323846;
          else if(phiIc <-3.14159265358979323846) phiIc+=2*3.14159265358979323846;
          
          if (abs(phiIc)<3.14159265358979323846) break;
        }
          
 
        //allow to skip it if you did not run out of possible drawing
        if (nTry++<=fInConeMaxTry){
          //draw another one if this one is not in acceptance
          if (etaIc<fInConeMinEta || etaIc > fInConeMaxEta) continue;
          if (phiIc<fInConeMinPhi || phiIc > fInConeMaxPhi) continue;
        }
        else{
          if ( fVerbosity > 0 )
            {
          cout << " MultiParticleInConeGunProducer : could not produce a particle "
               <<  fInConeIds[iPic]<<" in cone "
               <<  fMinDeltaR<<" to "<<fMaxDeltaR<<" within the "<<fInConeMaxTry<<" allowed tries."<<endl;
            }
          /*      edm::LogError("MultiParticleInConeGunProducer")<< " MultiParticleInConeGunProducer : could not produce a particle "<<
            fInConeIds[iPic]<<" in cone "<<
            fMinDeltaR<<" to "<<fMaxDeltaR<<" within the "<<fInConeMaxTry<<" allowed tries.";*/
        }
        int PartIDIc=fInConeIds[iPic];
        const HepPDT::ParticleData* 
          PDataIc = fPDGTable->particle(HepPDT::ParticleID(abs(PartIDIc)));
        
        //shoot momentum ratio
        double momR = fRandomGenerator->fire(fMinMomRatio, fMaxMomRatio);
        double massIc= PDataIc->mass().value() ;
        double momIc = momR * mom;
        double energyIc = sqrt(momIc*momIc + massIc*massIc);
 
        double thetaIc = 2.*atan(exp(-etaIc)) ;
        double pxIc = momIc*sin(thetaIc)*cos(phiIc);
        double pyIc = momIc*sin(thetaIc)*sin(phiIc);
        double pzIc = momIc*cos(thetaIc);
 
        HepMC::FourVector pIc(pxIc,pyIc,pzIc,energyIc) ;
        HepMC::GenParticle* PartIc = new HepMC::GenParticle(pIc, PartIDIc, 1);
        PartIc->suggest_barcode( barcode ) ;
        barcode++ ;
        Vtx->add_particle_out(PartIc);
        break;
      }//try many times while not in acceptance
        }//loop over the particle Ids in the cone
    }
 
    fEvt->add_vertex(Vtx) ;
    fEvt->set_event_number(e.id().event()) ;
    fEvt->set_signal_process_id(20) ; 
         
    if ( fVerbosity > 0 )
    {
       fEvt->print() ;  
    }
 
    auto_ptr<HepMCProduct> BProduct(new HepMCProduct()) ;
    BProduct->addHepMCData( fEvt );
    e.put(BProduct);
 
    auto_ptr<GenEventInfoProduct> genEventInfo(new GenEventInfoProduct(fEvt));
    e.put(genEventInfo);
 
    if ( fVerbosity > 0 )
      {
        cout << " MultiParticleInConeGunProducer : Event Generation Done " << endl;
      }
 }