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Public Member Functions | Private Attributes

gen::EvtGenInterface Class Reference

#include <EvtGenInterface.h>

List of all members.

Public Member Functions

void addToHepMC (HepMC::GenParticle *partHep, EvtId idEvt, HepMC::GenEvent *theEvent, bool del_daug)
HepMC::GenEvent * decay (HepMC::GenEvent *)
 EvtGenInterface (const edm::ParameterSet &)
void go_through_daughters (EvtParticle *part)
void init ()
const std::vector< int > & operatesOnParticles ()
void update_candlist (int theIndex, HepMC::GenParticle *thePart)
 ~EvtGenInterface ()

Private Attributes

std::vector< EvtId > forced_Evt
std::vector< int > forced_Hep
int index [10]
HepMC::GenParticle * listp [10]
EvtGen * m_EvtGen
CLHEP::RandFlat * m_flat
std::vector< int > m_PDGs
Pythia6Servicem_Py6Service
int nevent
int nforced
int nlist
int npartial
int nPythia
int ntotal
std::map< int, float > polarizations
std::vector< int > polarize_ids
std::vector< double > polarize_pol
bool usePythia

Detailed Description

Definition at line 48 of file EvtGenInterface.h.


Constructor & Destructor Documentation

EvtGenInterface::EvtGenInterface ( const edm::ParameterSet pset)

Definition at line 35 of file EvtGenInterface.cc.

References gather_cfg::cout, Exception, edm::ParameterSet::exists(), newFWLiteAna::found, edm::FileInPath::fullPath(), getId(), edm::ParameterSet::getParameter(), edm::ParameterSet::getUntrackedParameter(), i, edm::Service< T >::isAvailable(), and nevent.

{

  ntotal = 0;
  nevent = 0;
  std::cout << " EvtGenProducer starting ... " << std::endl;

  // create random engine and initialize seed using Random Number 
  // Generator Service 
  // as configured in the configuration file

  edm::Service<edm::RandomNumberGenerator> rngen;
  
  if ( ! rngen.isAvailable()) {             
    throw cms::Exception("Configuration")
      << "The EvtGenProducer module requires the RandomNumberGeneratorService\n"
      "which is not present in the configuration file.  You must add the service\n"
      "in the configuration file if you  want to run EvtGenProducer";
    }

  CLHEP::HepRandomEngine& m_engine = rngen->getEngine();
  m_flat = new CLHEP::RandFlat(m_engine, 0., 1.);
  myEvtRandomEngine* the_engine = new myEvtRandomEngine(&m_engine); 

  // Get data from parameter set
  edm::FileInPath decay_table = pset.getParameter<edm::FileInPath>("decay_table");
  edm::FileInPath pdt = pset.getParameter<edm::FileInPath>("particle_property_file");
  bool useDefault = pset.getUntrackedParameter<bool>("use_default_decay",true);
  usePythia = pset.getUntrackedParameter<bool>("use_internal_pythia",true);
  polarize_ids = pset.getUntrackedParameter<std::vector<int> >("particles_to_polarize",
                                                               std::vector<int>());
  polarize_pol = pset.getUntrackedParameter<std::vector<double> >("particle_polarizations",
                                                                  std::vector<double>());
  if (polarize_ids.size() != polarize_pol.size()) {
      throw cms::Exception("Configuration")
          << "EvtGenProducer requires that the particles_to_polarize and particle_polarization\n"
          "vectors be the same size.  Please fix this in your configuration.";
  }
  for (unsigned int ndx = 0; ndx < polarize_ids.size(); ndx++) {
      if (polarize_pol[ndx] < -1. || polarize_pol[ndx] > 1.) {
          throw cms::Exception("Configuration")
              << "EvtGenProducer error: particle polarizations must be in the range -1 < P < 1";
      }
      polarizations.insert(std::pair<int, float>(polarize_ids[ndx], polarize_pol[ndx]));
  }

  edm::FileInPath user_decay = pset.getParameter<edm::FileInPath>("user_decay_file");
  std::string decay_table_s = decay_table.fullPath();
  std::string pdt_s = pdt.fullPath();
  std::string user_decay_s = user_decay.fullPath();

  //-->pythia_params = pset.getParameter< std::vector<std::string> >("processParameters");
  
  
  // any number of alias names for forced decays can be specified using dynamic std vector of strings 
  std::vector<std::string> forced_names = pset.getParameter< std::vector<std::string> >("list_forced_decays");
    
  m_EvtGen = new EvtGen (decay_table_s.c_str(),pdt_s.c_str(),the_engine);  
  // 4th parameter should be rad cor - set to PHOTOS (default)
 
  if (!useDefault) m_EvtGen->readUDecay( user_decay_s.c_str() );

  std::vector<std::string>::const_iterator i;
  nforced=0;

  for (i=forced_names.begin(); i!=forced_names.end(); ++i)   
    // i will point to strings containing
    // names of particles with forced decay
    {
      nforced++;
      EvtId found = EvtPDL::getId(*i);      
      if (found.getId()==-1)
        {
          throw cms::Exception("Configuration")
            << "name in part list for forced decays not found: " << *i; 
        }
      if (found.getId()==found.getAlias())
        {
          throw cms::Exception("Configuration")
            << "name in part list for forced decays is not an alias: " << *i; 
        }
      forced_Evt.push_back(found);                      // forced_Evt is the list of EvtId's
      forced_Hep.push_back(EvtPDL::getStdHep(found));   // forced_Hep is the list of stdhep codes
    }

   // fill up default list of particles to be declared stable in the "master generator"
   // these are assumed to be PDG ID's
   // in case of combo with Pythia6, translation is done in Pythia6Hadronizer
   //
   // Note: Pythia6's kc=43, 44, and 84 commented out because they're obsolete (per S.Mrenna)
   //
   m_PDGs.push_back( 300553 ) ;
   m_PDGs.push_back( 511 ) ;
   m_PDGs.push_back( 521 ) ;
   m_PDGs.push_back( 523 ) ;
   m_PDGs.push_back( 513 ) ;
   m_PDGs.push_back( 533 ) ;
   m_PDGs.push_back( 531 ) ;
   
   m_PDGs.push_back( 15 ) ;
   
   m_PDGs.push_back( 413 ) ;
   m_PDGs.push_back( 423 ) ;
   m_PDGs.push_back( 433 ) ;
   m_PDGs.push_back( 411 ) ;
   m_PDGs.push_back( 421 ) ;
   m_PDGs.push_back( 431 ) ;   
   m_PDGs.push_back( 10411 );
   m_PDGs.push_back( 10421 );
   m_PDGs.push_back( 10413 );
   m_PDGs.push_back( 10423 );   
   m_PDGs.push_back( 20413 );
   m_PDGs.push_back( 20423 );
    
   m_PDGs.push_back( 415 );
   m_PDGs.push_back( 425 );
   m_PDGs.push_back( 10431 );
   m_PDGs.push_back( 20433 );
   m_PDGs.push_back( 10433 );
   m_PDGs.push_back( 435 );
   
   m_PDGs.push_back( 310 );
   m_PDGs.push_back( 311 );
   m_PDGs.push_back( 313 );
   m_PDGs.push_back( 323 );
   m_PDGs.push_back( 10321 );
   m_PDGs.push_back( 10311 );
   m_PDGs.push_back( 10313 );
   m_PDGs.push_back( 10323 );
   m_PDGs.push_back( 20323 );
   m_PDGs.push_back( 20313 );
   m_PDGs.push_back( 325 );
   m_PDGs.push_back( 315 );
   
   m_PDGs.push_back( 100313 );
   m_PDGs.push_back( 100323 );
   m_PDGs.push_back( 30313 );
   m_PDGs.push_back( 30323 );
   m_PDGs.push_back( 30343 );
   m_PDGs.push_back( 30353 );
   m_PDGs.push_back( 30363 );

   m_PDGs.push_back( 111 );
   m_PDGs.push_back( 221 );
   m_PDGs.push_back( 113 );
   m_PDGs.push_back( 213 );
   m_PDGs.push_back( 223 );
   m_PDGs.push_back( 331 );
   m_PDGs.push_back( 333 );
   m_PDGs.push_back( 20213 );
   m_PDGs.push_back( 20113 );
   m_PDGs.push_back( 215 );
   m_PDGs.push_back( 115 );
   m_PDGs.push_back( 10213 );
   m_PDGs.push_back( 10113 );
   m_PDGs.push_back( 9000111 ); // PDG ID = 9000111, Pythia6 ID = 10111
   m_PDGs.push_back( 9000211 ); // PDG ID = 9000211, Pythia6 ID = 10211
   m_PDGs.push_back( 9010221 ); // PDG ID = 9010211, Pythia6 ID = ???
   m_PDGs.push_back( 10221 );
   m_PDGs.push_back( 20223 );
   m_PDGs.push_back( 20333 );
   m_PDGs.push_back( 225 );
   m_PDGs.push_back( 9020221 ); // PDG ID = 9020211, Pythia6 ID = ???
   m_PDGs.push_back( 335 );
   m_PDGs.push_back( 10223 );
   m_PDGs.push_back( 10333 );
   m_PDGs.push_back( 100213 );
   m_PDGs.push_back( 100113 );
   
   m_PDGs.push_back( 441 );
   m_PDGs.push_back( 100441 );
   m_PDGs.push_back( 443 );
   m_PDGs.push_back( 100443 );
   m_PDGs.push_back( 9000443 );
   m_PDGs.push_back( 9010443 );
   m_PDGs.push_back( 9020443 );
   m_PDGs.push_back( 10441 );
   m_PDGs.push_back( 20443 );
   m_PDGs.push_back( 445 );

   m_PDGs.push_back( 30443 );
   m_PDGs.push_back( 551 );
   m_PDGs.push_back( 553 );
   m_PDGs.push_back( 100553 );
   m_PDGs.push_back( 200553 );
   m_PDGs.push_back( 10551 );
   m_PDGs.push_back( 20553 );
   m_PDGs.push_back( 555 );
   m_PDGs.push_back( 10553 );

   m_PDGs.push_back( 110551 );
   m_PDGs.push_back( 120553 );
   m_PDGs.push_back( 100555 );
   m_PDGs.push_back( 210551 );
   m_PDGs.push_back( 220553 );
   m_PDGs.push_back( 200555 );
   m_PDGs.push_back( 30553 );
   m_PDGs.push_back( 20555 );

   m_PDGs.push_back( 557 );
   m_PDGs.push_back( 130553 ); 
   m_PDGs.push_back( 120555 );
   m_PDGs.push_back( 100557 );
   m_PDGs.push_back( 110553 );
   m_PDGs.push_back( 210553 );
   m_PDGs.push_back( 10555 );
   m_PDGs.push_back( 110555 );

   m_PDGs.push_back( 4122 );
   m_PDGs.push_back( 4132 );
   // m_PDGs.push_back( 84 ); // obsolete
   m_PDGs.push_back( 4112 );
   m_PDGs.push_back( 4212 );
   m_PDGs.push_back( 4232 );
   m_PDGs.push_back( 4222 );
   m_PDGs.push_back( 4322 );
   m_PDGs.push_back( 4312 );

   m_PDGs.push_back( 13122 );
   m_PDGs.push_back( 13124 );
   m_PDGs.push_back( 23122 );
   m_PDGs.push_back( 33122 );
   m_PDGs.push_back( 43122 );
   m_PDGs.push_back( 53122 );
   m_PDGs.push_back( 13126 );
   m_PDGs.push_back( 13212 );
   m_PDGs.push_back( 13241 );
  
   m_PDGs.push_back( 3126 );
   m_PDGs.push_back( 3124 );
   m_PDGs.push_back( 3122 );
   m_PDGs.push_back( 3222 );
   m_PDGs.push_back( 2214 );
   m_PDGs.push_back( 2224 );
   m_PDGs.push_back( 3324 );
   m_PDGs.push_back( 2114 );
   m_PDGs.push_back( 1114 );
   m_PDGs.push_back( 3112 );
   m_PDGs.push_back( 3212 );
   m_PDGs.push_back( 3114 );
   m_PDGs.push_back( 3224 );
   m_PDGs.push_back( 3214 );
   m_PDGs.push_back( 3216 );
   m_PDGs.push_back( 3322 );
   m_PDGs.push_back( 3312 );
   m_PDGs.push_back( 3314 );
   m_PDGs.push_back( 3334 );
   
   m_PDGs.push_back( 4114 );
   m_PDGs.push_back( 4214 );
   m_PDGs.push_back( 4224 );
   m_PDGs.push_back( 4314 );
   m_PDGs.push_back( 4324 );
   m_PDGs.push_back( 4332 );
   m_PDGs.push_back( 4334 );
   //m_PDGs.push_back( 43 ); // obsolete (?)
   //m_PDGs.push_back( 44 ); // obsolete (?)
   m_PDGs.push_back( 10443 );

   m_PDGs.push_back( 5122 );
   m_PDGs.push_back( 5132 );
   m_PDGs.push_back( 5232 );
   m_PDGs.push_back( 5332 );
   m_PDGs.push_back( 5222 );
   m_PDGs.push_back( 5112 );
   m_PDGs.push_back( 5212 );
   m_PDGs.push_back( 541 );
   m_PDGs.push_back( 14122 );
   m_PDGs.push_back( 14124 );
   m_PDGs.push_back( 5312 );
   m_PDGs.push_back( 5322 );
   m_PDGs.push_back( 10521 );
   m_PDGs.push_back( 20523 );
   m_PDGs.push_back( 10523 );

   m_PDGs.push_back( 525 );
   m_PDGs.push_back( 10511 );
   m_PDGs.push_back( 20513 );
   m_PDGs.push_back( 10513 );
   m_PDGs.push_back( 515 );
   m_PDGs.push_back( 10531 );
   m_PDGs.push_back( 20533 );
   m_PDGs.push_back( 10533 );
   m_PDGs.push_back( 535 );
   m_PDGs.push_back( 543 );
   m_PDGs.push_back( 545 );
   m_PDGs.push_back( 5114 );
   m_PDGs.push_back( 5224 );
   m_PDGs.push_back( 5214 );
   m_PDGs.push_back( 5314 );
   m_PDGs.push_back( 5324 );
   m_PDGs.push_back( 5334 );
   m_PDGs.push_back( 10541 );
   m_PDGs.push_back( 10543 );
   m_PDGs.push_back( 20543 );

   m_PDGs.push_back( 4424 );
   m_PDGs.push_back( 4422 );
   m_PDGs.push_back( 4414 );
   m_PDGs.push_back( 4412 );
   m_PDGs.push_back( 4432 );
   m_PDGs.push_back( 4434 );

   m_PDGs.push_back( 130 );
   
   // now check if we need to override default list of particles/IDs
   if ( pset.exists("operates_on_particles") )
   {
      std::vector<int> tmpPIDs = pset.getParameter< std::vector<int> >("operates_on_particles");
      if ( tmpPIDs.size() > 0 )
      {
         if ( tmpPIDs[0] > 0 ) // 0 means default !!!
         {
            m_PDGs.clear();
            m_PDGs = tmpPIDs;
         }
      }
   } 
   
  m_Py6Service = new Pythia6Service;
} 
EvtGenInterface::~EvtGenInterface ( )

Definition at line 357 of file EvtGenInterface.cc.

References gather_cfg::cout.

{
  std::cout << " EvtGenProducer terminating ... " << std::endl; 
  delete m_Py6Service;
}

Member Function Documentation

void EvtGenInterface::addToHepMC ( HepMC::GenParticle *  partHep,
EvtId  idEvt,
HepMC::GenEvent *  theEvent,
bool  del_daug 
)

Definition at line 454 of file EvtGenInterface.cc.

References gather_cfg::cout, Vector3DBase< T, FrameTag >::cross(), configurableAnalysis::GenParticle, edm::second(), sistrip::STRING, Vector3DBase< T, FrameTag >::unit(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

{
  // Set spin type
  EvtSpinType::spintype stype = EvtPDL::getSpinType(idEvt);
  EvtParticle* partEvt;
    switch (stype){
    case EvtSpinType::SCALAR: 
      partEvt = new EvtScalarParticle();
      break;
    case EvtSpinType::STRING:
      partEvt = new EvtStringParticle();    
      break;
    case EvtSpinType::DIRAC: 
      partEvt = new EvtDiracParticle();
      break;
    case EvtSpinType::VECTOR:
      partEvt = new EvtVectorParticle();
      break;
    case EvtSpinType::RARITASCHWINGER:
      partEvt = new EvtRaritaSchwingerParticle();
      break;
    case EvtSpinType::TENSOR:
      partEvt = new EvtTensorParticle();
      break;
    case EvtSpinType::SPIN5HALF: case EvtSpinType::SPIN3: case EvtSpinType::SPIN7HALF: case EvtSpinType::SPIN4:
      partEvt = new EvtHighSpinParticle();
      break;
    default:
      std::cout << "Unknown spintype in EvtSpinType!" << std::endl;   
      return;
    }

    // Generate decay
    EvtVector4R momEvt;
    HepMC::FourVector momHep = partHep->momentum();
    momEvt.set(momHep.t(),momHep.x(),momHep.y(),momHep.z());
    EvtVector4R posEvt;
    HepMC::GenVertex* initVert = partHep->production_vertex();
    HepMC::FourVector posHep = initVert->position();
    posEvt.set(posHep.t(),posHep.x(),posHep.y(),posHep.z());
    partEvt->init(idEvt,momEvt);
    if (stype == EvtSpinType::DIRAC 
        && polarizations.find(partHep->pdg_id()) != polarizations.end()) {
         // std::cout << "Polarize particle" << std::endl;
        //Particle is spin 1/2, so we can polarize it.
        //Check polarizations map for particle, grab its polarization if it exists
        // and make the spin density matrix
        float pol = polarizations.find(partHep->pdg_id())->second;
        GlobalVector pPart(momHep.x(), momHep.y(), momHep.z());
        //std::cout << "Polarizing particle with PDG ID "
        //  << partHep->pdg_id()
        //  << " at " << pol*100 << "%" << std::endl;
        GlobalVector zHat(0., 0., 1.);
        GlobalVector zCrossP = zHat.cross(pPart);
        GlobalVector polVec = pol * zCrossP.unit();

        EvtSpinDensity theSpinDensity;
        theSpinDensity.SetDim(2);
        theSpinDensity.Set(0, 0, EvtComplex(1./2. + polVec.z()/2., 0.));
        theSpinDensity.Set(0, 1, EvtComplex(polVec.x()/2., -polVec.y()/2.));
        theSpinDensity.Set(1, 0, EvtComplex(polVec.x()/2., polVec.y()/2.));
        theSpinDensity.Set(1, 1, EvtComplex(1./2. - polVec.z()/2., 0.));

        partEvt->setSpinDensityForwardHelicityBasis(theSpinDensity);

    } else {
        partEvt->setDiagonalSpinDensity();     
    }
    partEvt->decay();
                       
    // extend the search of candidates to be forced to EvtGen decay products and delete their daughters  ** 
    // otherwise they wouldn't get their chance to take part in the forced decay lottery                 **
    if (del_daug) go_through_daughters(partEvt);    // recursive function go_through_daughters will do   **

    // Change particle in stdHEP format
    static EvtStdHep evtstdhep;
    
    evtstdhep.init();
    partEvt->makeStdHep(evtstdhep);

    ntotal++;
    partEvt->deleteTree();

    // ********* Now add to the HepMC Event **********

    // Then loop on evtstdhep to add vertexes... 
    HepMC::GenVertex* theVerts[200];
    for (int ivert = 0; ivert < 200; ivert++) { 
      theVerts[ivert] = 0;
    }

    for (int ipart = 0; ipart < evtstdhep.getNPart(); ipart++) {
      int theMum = evtstdhep.getFirstMother(ipart);
      if (theMum != -1 && !theVerts[theMum]) {
        EvtVector4R theVpos = evtstdhep.getX4(ipart) + posEvt;
        theVerts[theMum] = 
          new HepMC::GenVertex(HepMC::FourVector(theVpos.get(1),
                                                 theVpos.get(2),
                                                 theVpos.get(3),
                                                 theVpos.get(0)),0);
      }
    }

    // ...then particles
    partHep->set_status(2);
    if (theVerts[0]) theVerts[0]->add_particle_in( partHep );

    for (int ipart2 = 1; ipart2 < evtstdhep.getNPart(); ipart2++) {
      int idHep = evtstdhep.getStdHepID(ipart2);
      HepMC::GenParticle* thePart = 
        new HepMC::GenParticle( HepMC::FourVector(evtstdhep.getP4(ipart2).get(1),
                                                  evtstdhep.getP4(ipart2).get(2),
                                                  evtstdhep.getP4(ipart2).get(3),
                                                  evtstdhep.getP4(ipart2).get(0)),
                                idHep,
                                evtstdhep.getIStat(ipart2));
      npartial++;
      thePart->suggest_barcode(npartial + nPythia);
      int theMum2 = evtstdhep.getFirstMother(ipart2);
      if (theMum2 != -1 && theVerts[theMum2]) theVerts[theMum2]->add_particle_out( thePart );
      if (theVerts[ipart2]) theVerts[ipart2]->add_particle_in( thePart );
       
    }
    
    for (int ipart3 = 0; ipart3 < evtstdhep.getNPart(); ipart3++) {
      if (theVerts[ipart3]) theEvent->add_vertex( theVerts[ipart3] );
    }
    
}        
HepMC::GenEvent * EvtGenInterface::decay ( HepMC::GenEvent *  evt)

Definition at line 382 of file EvtGenInterface.cc.

References i, getHLTprescales::index, gen::k, nevent, gen::p, and ntuplemaker::status.

Referenced by gen::ExternalDecayDriver::decay().

{
  Pythia6Service::InstanceWrapper guard(m_Py6Service);  // grab Py6 instance

  nevent++;
  npartial = 0;
  // std::cout << "nevent = " << nevent << std::endl ;
  
  int idHep,ipart,status;
  EvtId idEvt;

  nPythia = evt->particles_size();
  // FIX A MEMORY LEAK (RC)
  // HepMC::GenEvent* newEvt = new HepMC::GenEvent( *evt );

  // First pass through undecayed Pythia particles to decay particles known to EvtGen left stable by Pythia
  // except candidates to be forced which will be searched later to include EvtGen decay products 
  nlist = 0;

  // Notice dynamical use of evt
  for (HepMC::GenEvent::particle_const_iterator p= evt->particles_begin(); p != evt->particles_end(); ++p)
    {
      status = (*p)->status();
 
      if(status==1) {           // only not decayed (status = 1) particles
          

          idHep = (*p)->pdg_id();
          int do_force=0;
          for(int i=0;i<nforced;i++)           // First check if part with forced decay
            {                                  // In that case do not decay immediately 
              if(idHep == forced_Hep[i])       // (only 1 per event will be forced)      
                {                              // Fill list
                  update_candlist(i,*p);
                  do_force=1;
                }
            }
          if(do_force==0)         // particles with decays not forced are decayed immediately 
            {
              idEvt = EvtPDL::evtIdFromStdHep(idHep);
              ipart = idEvt.getId();
              if (ipart==-1) continue;                          // particle not known to EvtGen       
              if (EvtDecayTable::getNMode(ipart)==0) continue;  // particles stable for EvtGen
              addToHepMC(*p,idEvt,evt,true);                      // generate decay
            }
        }
    }

  if(nlist!=0)   
     {
      // decide randomly which one to decay as alias
      int which = (int)(nlist*m_flat->fire()); 
      if (which == nlist) which = nlist-1;
  
          for(int k=0;k < nlist; k++)
            {
              if(k == which || !usePythia) {            
                addToHepMC(listp[k],forced_Evt[index[k]],evt,false);  // decay as alias
              } 
              else
                {
                  int id_non_alias = forced_Evt[index[k]].getId();
                  EvtId non_alias(id_non_alias,id_non_alias); // create new EvtId with id = alias
                  addToHepMC(listp[k],non_alias,evt,false);     // decay as standard (non alias)
                }
            }
     }

  return evt;
  
}
void EvtGenInterface::go_through_daughters ( EvtParticle *  part)

Definition at line 595 of file EvtGenInterface.cc.

References newFWLiteAna::found, i, and gen::k.

                                                       {

  int NDaug=part->getNDaug();
  if(NDaug)
    {
      EvtParticle* Daughter;
      for (int i=0;i<NDaug;i++)
        {
          Daughter=part->getDaug(i);
          int idHep = EvtPDL::getStdHep(Daughter->getId());
          int found=0;
          for(int k=0;k<nforced;k++)         
            {
              if(idHep == forced_Hep[k])
                { 
                  found = 1;
                  Daughter->deleteDaughters();
                }
            }
          if (!found) go_through_daughters(Daughter);
        }
    }
}
void EvtGenInterface::init ( void  )

Definition at line 363 of file EvtGenInterface.cc.

Referenced by gen::ExternalDecayDriver::init().

{

   Pythia6Service::InstanceWrapper guard(m_Py6Service); // grab Py6 instance
   
   // Do here initialization of EvtPythia then restore original settings
   if (usePythia) EvtPythia::pythiaInit(0);
   
// no need - will be done via Pythia6Hadronizer::declareStableParticles
//
//    for( std::vector<std::string>::const_iterator itPar = pythia_params.begin(); itPar != pythia_params.end(); ++itPar ) {
//      call_pygive(*itPar);
//    }

   return ;

}
const std::vector<int>& gen::EvtGenInterface::operatesOnParticles ( ) [inline]

Definition at line 57 of file EvtGenInterface.h.

References m_PDGs.

Referenced by gen::ExternalDecayDriver::init().

{ return m_PDGs; }      
void EvtGenInterface::update_candlist ( int  theIndex,
HepMC::GenParticle *  thePart 
)

Definition at line 620 of file EvtGenInterface.cc.

References CastorDataFrameFilter_impl::check(), Exception, and getHLTprescales::index.

{
  if(nlist<10)                 // not nice ... but is 10 a reasonable maximum?
     {
       bool isThere = false;
       if (nlist) {
         for (int check=0; check < nlist; check++) {
           if (listp[check]->barcode() == thePart->barcode()) isThere = true;
         }
       }
       if (!isThere) { 
         listp[nlist] = thePart;
         index[nlist++] = theIndex;
       }
     }
  else
    {
      throw cms::Exception("runtime")
        << "more than 10 candidates to be forced ";
      return; 
    }  
  return;
}

Member Data Documentation

std::vector<EvtId> gen::EvtGenInterface::forced_Evt [private]

Definition at line 74 of file EvtGenInterface.h.

std::vector<int> gen::EvtGenInterface::forced_Hep [private]

Definition at line 75 of file EvtGenInterface.h.

int gen::EvtGenInterface::index[10] [private]

Definition at line 90 of file EvtGenInterface.h.

HepMC::GenParticle* gen::EvtGenInterface::listp[10] [private]

Definition at line 89 of file EvtGenInterface.h.

EvtGen* gen::EvtGenInterface::m_EvtGen [private]

Definition at line 73 of file EvtGenInterface.h.

CLHEP::RandFlat* gen::EvtGenInterface::m_flat [private]

Definition at line 72 of file EvtGenInterface.h.

std::vector<int> gen::EvtGenInterface::m_PDGs [private]

Definition at line 70 of file EvtGenInterface.h.

Referenced by operatesOnParticles().

Definition at line 68 of file EvtGenInterface.h.

Definition at line 77 of file EvtGenInterface.h.

Definition at line 76 of file EvtGenInterface.h.

Definition at line 88 of file EvtGenInterface.h.

Definition at line 77 of file EvtGenInterface.h.

Definition at line 79 of file EvtGenInterface.h.

Definition at line 77 of file EvtGenInterface.h.

std::map<int, float> gen::EvtGenInterface::polarizations [private]

Definition at line 86 of file EvtGenInterface.h.

std::vector<int> gen::EvtGenInterface::polarize_ids [private]

Definition at line 84 of file EvtGenInterface.h.

std::vector<double> gen::EvtGenInterface::polarize_pol [private]

Definition at line 85 of file EvtGenInterface.h.

Definition at line 80 of file EvtGenInterface.h.