gen::Pythia6PtYDistGun Class Reference

#include <Pythia6PtYDistGun.h>

Inheritance diagram for gen::Pythia6PtYDistGun:

Public Member Functions
	Pythia6PtYDistGun (const edm::ParameterSet &)
virtual	~Pythia6PtYDistGun ()
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
PtYDistributor *	fPtYGenerator

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 12 of file Pythia6PtYDistGun.h.

Constructor & Destructor Documentation

Pythia6PtYDistGun::Pythia6PtYDistGun

(

const edm::ParameterSet &

pset

)

Definition at line 21 of file Pythia6PtYDistGun.cc.

References fPtYGenerator, gen::getEngineReference(), and edm::ParameterSet::getParameter().

                                                               :
   Pythia6ParticleGun(pset), fPtYGenerator(0)
{
   
   ParameterSet pgun_params = 
      pset.getParameter<ParameterSet>("PGunParameters"); 
   
   fPtYGenerator = new PtYDistributor( pgun_params.getParameter<FileInPath>("kinematicsFile"), 
                                       getEngineReference(), 
                       pgun_params.getParameter<double>("MaxPt"),
                                       pgun_params.getParameter<double>("MinPt"),
                       pgun_params.getParameter<double>("MaxY"), 
                       pgun_params.getParameter<double>("MinY"), 
                       pgun_params.getParameter<int>("PtBinning"), 
                       pgun_params.getParameter<int>("YBinning") );
}

Pythia6PtYDistGun::~Pythia6PtYDistGun ( )

virtual

Definition at line 38 of file Pythia6PtYDistGun.cc.

References fPtYGenerator.

{
   if ( fPtYGenerator ) delete fPtYGenerator;
}

Member Function Documentation

void Pythia6PtYDistGun::generateEvent ( )

protectedvirtual

Implements gen::Pythia6Gun.

Definition at line 43 of file Pythia6PtYDistGun.cc.

References create_public_lumi_plots::exp, gen::Pythia6Gun::fEvt, gen::PtYDistributor::firePt(), gen::PtYDistributor::fireY(), gen::Pythia6Gun::fMaxPhi, gen::Pythia6Gun::fMinPhi, gen::Pythia6ParticleGun::fPartIDs, fPtYGenerator, gen::Pythia6Gun::fPy6Service, configurableAnalysis::GenParticle, i, M_PI, scaleCards::mass, gen::p, phi, gen::py1ent_(), gen::pyexec_(), gen::pymass_(), gen::pyr_(), mathSSE::sqrt(), and detailsBasic3DVector::y.

{
   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 pt=0, y=0, u=0, ee=0, the=0;
     
     pt = fPtYGenerator->firePt();
     y  = fPtYGenerator->fireY();
     u  = exp(y); 
     
     double mass = pymass_(py6PID);
     
     // 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; 

     ee = 0.5*std::sqrt(mass*mass+pt*pt)*(u*u+1)/u;
     
     double pz = std::sqrt(ee*ee-pt*pt-mass*mass);
     if ( y < 0. ) pz *= -1;
     
     double phi = (fMaxPhi-fMinPhi)*pyr_(&dum)+fMinPhi;

     the  = atan(pt/pz);
     if ( pz < 0. ) the += M_PI ;                                                                      
     
     py1ent_(ip, py6PID, ee, the, phi);
     
/*
         double px     = pt*cos(phi) ;
         double py     = pt*sin(phi) ;
*/         
         double px     = pyjets.p[0][ip-1]; // pt*cos(phi) ;
         double py     = pyjets.p[1][ip-1]; // pt*sin(phi) ;
         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);
     
     ip++;
   
   }
  
   fEvt->add_vertex(Vtx);
     
   // run pythia
   pyexec_();
   
   return;
}

Member Data Documentation

PtYDistributor* gen::Pythia6PtYDistGun::fPtYGenerator

private

Definition at line 26 of file Pythia6PtYDistGun.h.

Referenced by generateEvent(), Pythia6PtYDistGun(), and ~Pythia6PtYDistGun().