PartonHadronDecayGenEvtSelector.cc

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#include <iostream>
#include "GeneratorInterface/HiGenCommon/interface/PartonHadronDecayGenEvtSelector.h"
#include "FWCore/Utilities/interface/EDMException.h"
using namespace std;

PartonHadronDecayGenEvtSelector::PartonHadronDecayGenEvtSelector(const edm::ParameterSet& pset)
    : BaseHiGenEvtSelector(pset) {
  hadronId_ = pset.getParameter<vector<int> >("hadrons");
  hadronStatus_ = pset.getParameter<vector<int> >("hadronStatus");
  hadronEtaMax_ = pset.getParameter<vector<double> >("hadronEtaMax");
  hadronEtaMin_ = pset.getParameter<vector<double> >("hadronEtaMin");
  hadronPMin_ = pset.getParameter<vector<double> >("hadronPMin");
  hadronPtMax_ = pset.getParameter<vector<double> >("hadronPtMax");
  hadronPtMin_ = pset.getParameter<vector<double> >("hadronPtMin");

  decayId_ = pset.getParameter<int>("decays");
  decayStatus_ = pset.getParameter<int>("decayStatus");
  decayEtaMax_ = pset.getParameter<double>("decayEtaMax");
  decayEtaMin_ = pset.getParameter<double>("decayEtaMin");
  decayPMin_ = pset.getParameter<double>("decayPMin");
  decayPtMax_ = pset.getParameter<double>("decayPtMax");
  decayPtMin_ = pset.getParameter<double>("decayPtMin");
  decayNtrig_ = pset.getParameter<int>("decayNtrig");

  partonId_ = pset.getParameter<vector<int> >("partons");
  partonStatus_ = pset.getParameter<vector<int> >("partonStatus");
  partonEtaMax_ = pset.getParameter<vector<double> >("partonEtaMax");
  partonPtMin_ = pset.getParameter<vector<double> >("partonPtMin");

  int id = hadronId_.size();
  int st = hadronStatus_.size();
  int etamax = hadronEtaMax_.size();
  int etamin = hadronEtaMin_.size();
  int pmin = hadronPMin_.size();
  int ptmax = hadronPtMax_.size();
  int ptmin = hadronPtMin_.size();

  if (id != st || id != etamax || id != etamin || id != ptmax || id != ptmin || id != pmin) {
    throw edm::Exception(edm::errors::LogicError)
        << "Hadron selection parameters: " << id << st << etamax << etamin << pmin << ptmax << ptmin << endl;
  }

  id = partonId_.size();
  st = partonStatus_.size();
  etamax = partonEtaMax_.size();
  ptmin = partonPtMin_.size();

  if (id != st || id != etamax || id != ptmin) {
    throw edm::Exception(edm::errors::LogicError)
        << "Parton selection parameters: " << id << st << etamax << ptmin << endl;
  }
}

//____________________________________________________________________________________________
bool PartonHadronDecayGenEvtSelector::filter(HepMC::GenEvent* evt) {
  // loop over HepMC event, and search for  products of interest

  HepMC::GenEvent::particle_const_iterator begin = evt->particles_begin();
  HepMC::GenEvent::particle_const_iterator end = evt->particles_end();

  bool foundHadron = false;
  bool foundDecay = false;
  bool foundParton = false;

  HepMC::GenEvent::particle_const_iterator it = begin;
  while (!foundParton && it != end) {
    for (unsigned i = 0; i < partonId_.size(); ++i) {
      if (selectParticle(*it, partonStatus_[i], partonId_[i], partonPtMin_[i], partonEtaMax_[i]))
        foundParton = true;
    }
    ++it;
  }

  int foundtrig = 0;
  HepMC::GenEvent::particle_const_iterator it2 = begin;

  if (foundParton) {
    while ((!foundHadron || !foundDecay) && it2 != end) {
      for (unsigned i = 0; i < hadronId_.size(); ++i) {
        if (selectParticle(*it2,
                           hadronStatus_[i],
                           hadronId_[i],
                           hadronEtaMax_[i],
                           hadronEtaMin_[i],
                           hadronPMin_[i],
                           hadronPtMax_[i],
                           hadronPtMin_[i]))
          foundHadron = true;
      }

      if (selectParticle(
              *it2, decayStatus_, decayId_, decayEtaMax_, decayEtaMin_, decayPMin_, decayPtMax_, decayPtMin_))
        foundtrig++;
      if (decayNtrig_ == foundtrig)
        foundDecay = true;

      ++it2;
    }
  }

  return (foundHadron && foundDecay && foundParton);
}

//____________________________________________________________________________________________