#include <Pythia6EGun.h>

Inheritance diagram for gen::Pythia6EGun:

Public Member Functions
	Pythia6EGun (const edm::ParameterSet &)

virtual	~Pythia6EGun ()

Public Member Functions inherited from gen::Pythia6ParticleGun
	Pythia6ParticleGun (const edm::ParameterSet &)

virtual	~Pythia6ParticleGun ()

Public Member Functions inherited from gen::Pythia6Gun
void	beginJob ()

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

void	endJob ()

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

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

	Pythia6Gun (const edm::ParameterSet &)

virtual	~Pythia6Gun ()

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 Member Functions
void	generateEvent ()

Protected Member Functions inherited from gen::Pythia6Gun
HepMC::GenParticle *	addAntiParticle (int &, int &, double &, double &, double &)

void	attachPy6DecaysToGenEvent ()

void	loadEvent (edm::Event &)

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)

Private Attributes
bool	fAddAntiParticle

double	fMaxE

double	fMaxEta

double	fMinE

double	fMinEta

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 Attributes inherited from gen::Pythia6ParticleGun
std::vector< int >	fPartIDs

Protected Attributes inherited from gen::Pythia6Gun
HepMC::GenEvent *	fEvt

bool	fHepMCVerbosity

int	fMaxEventsToPrint

double	fMaxPhi

double	fMinPhi

std::vector< int >	fPartIDs

Pythia6Service *	fPy6Service

int	fPylistVerbosity

Detailed Description

Definition at line 8 of file Pythia6EGun.h.

Constructor & Destructor Documentation

Pythia6EGun::Pythia6EGun ( const edm::ParameterSet & pset )

Definition at line 18 of file Pythia6EGun.cc.

References fAddAntiParticle, fMaxE, fMaxEta, fMinE, fMinEta, and edm::ParameterSet::getParameter().

                                                    :
    Pythia6ParticleGun(pset)
 {
    
    // ParameterSet defpset ;
    ParameterSet pgun_params = 
       pset.getParameter<ParameterSet>("PGunParameters"); // , defpset ) ;
    fMinEta     = pgun_params.getParameter<double>("MinEta"); // ,-2.2);
    fMaxEta     = pgun_params.getParameter<double>("MaxEta"); // , 2.2);
    fMinE       = pgun_params.getParameter<double>("MinE"); // ,  0.);
    fMaxE       = pgun_params.getParameter<double>("MaxE"); // ,  0.);
    fAddAntiParticle = pgun_params.getParameter<bool>("AddAntiParticle"); //, false) ;  
 
 }

Pythia6EGun::~Pythia6EGun ( )

virtual

Definition at line 33 of file Pythia6EGun.cc.

34 {

35 }

Member Function Documentation

void Pythia6EGun::generateEvent ( )

protectedvirtual

Implements gen::Pythia6Gun.

Definition at line 37 of file Pythia6EGun.cc.

References gen::Pythia6Gun::addAntiParticle(), eta(), create_public_lumi_plots::exp, fAddAntiParticle, gen::Pythia6Gun::fEvt, fMaxE, fMaxEta, gen::Pythia6Gun::fMaxPhi, fMinE, fMinEta, gen::Pythia6Gun::fMinPhi, gen::Pythia6ParticleGun::fPartIDs, gen::Pythia6Gun::fPy6Service, configurableAnalysis::GenParticle, i, scaleCards::mass, gen::p, phi, gen::py1ent_(), gen::pyexec_(), gen::pymass_(), and gen::pyr_().

 {
    
    Pythia6Service::InstanceWrapper guard(fPy6Service);  // grab Py6 instance
 
    // now actualy, start cooking up the event gun 
    //
 
    // 1st, primary vertex
    //
    HepMC::GenVertex* Vtx = new HepMC::GenVertex( HepMC::FourVector(0.,0.,0.));
 
    // here re-create fEvt (memory)
    //
    fEvt = new HepMC::GenEvent() ;
      
    int ip=1;
    for ( size_t i=0; i<fPartIDs.size(); i++ )
    {
      int particleID = fPartIDs[i]; // this is PDG - need to convert to Py6 !!!
      int py6PID = HepPID::translatePDTtoPythia( particleID );
          int dum = 0;
      double ee=0,the=0,eta=0;
      double mass = pymass_(particleID);
      
      // fill p(ip,5) (in PYJETS) with mass value right now,
      // because the (hardcoded) mstu(10)=1 will make py1ent
      // pick the mass from there
      pyjets.p[4][ip-1]=mass;     
      
      double phi = (fMaxPhi-fMinPhi)*pyr_(&dum)+fMinPhi;
      ee   = (fMaxE-fMinE)*pyr_(&dum)+fMinE;
      eta  = (fMaxEta-fMinEta)*pyr_(&dum)+fMinEta;                                                      
      the  = 2.*atan(exp(-eta));                                                                          
      
      py1ent_(ip, py6PID, ee, the, phi);
      
          double px     = pyjets.p[0][ip-1]; // pt*cos(phi) ;
          double py     = pyjets.p[1][ip-1]; // pt*sin(phi) ;
          double pz     = pyjets.p[2][ip-1]; // mom*cos(the) ;
  
      HepMC::FourVector p(px,py,pz,ee) ;
          HepMC::GenParticle* Part = 
              new HepMC::GenParticle(p,particleID,1);
          Part->suggest_barcode( ip ) ;
          Vtx->add_particle_out(Part);
      
      if(fAddAntiParticle)
      {
         ip = ip + 1;
         HepMC::GenParticle* APart = addAntiParticle( ip, particleID, ee, eta, phi );
         if ( APart ) Vtx->add_particle_out(APart) ;     
      }
      ip++;
    }
    
    fEvt->add_vertex(Vtx);
      
    // run pythia
    pyexec_();
    
    return;
 }