HZZ4lFilter.cc

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// -*- C++ -*-
//
// Package:    HZZ4lFilter
// Class:      HZZ4lFilter
// 
//
// Original Author:  Puljak Ivica
//         Created:  Wed Apr 18 12:52:31 CEST 2007
// $Id: HZZ4lFilter.cc,v 1.6 2010/09/07 11:45:07 fabstoec Exp $
//
//

#include "GeneratorInterface/GenFilters/interface/HZZ4lFilter.h"

// system include files
#include <memory>

// user include files
#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/EDFilter.h"

#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/MakerMacros.h"

#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include "SimDataFormats/GeneratorProducts/interface/HepMCProduct.h"


HZZ4lFilter::HZZ4lFilter(const edm::ParameterSet& iConfig) :
label_(iConfig.getUntrackedParameter("moduleLabel",std::string("generator"))),
minPtElectronMuon(iConfig.getUntrackedParameter("MinPtElectronMuon", 0.)),
maxEtaElectronMuon(iConfig.getUntrackedParameter("MaxEtaElectronMuon", 10.))
{
   //now do what ever initialization is needed

}


HZZ4lFilter::~HZZ4lFilter()
{
 
   // do anything here that needs to be done at desctruction time
   // (e.g. close files, deallocate resources etc.)

}


//
// member functions
//

// ------------ method called on each new Event  ------------
bool
HZZ4lFilter::filter(edm::Event& iEvent, const edm::EventSetup& iSetup)
{
   using namespace edm;

   bool accepted = false;
   int nLeptons = 0;

   Handle< HepMCProduct > evt;
   iEvent.getByLabel(label_, evt);
   
   const HepMC::GenEvent * myGenEvent = evt->GetEvent();
   
   for ( HepMC::GenEvent::particle_const_iterator p = myGenEvent->particles_begin();   p != myGenEvent->particles_end(); ++p ) {
    
      if ( (*p)->status()!=1 ) continue;

      if ((*p)->momentum().perp() > minPtElectronMuon && fabs((*p)->momentum().eta()) < maxEtaElectronMuon) {
        if ( abs((*p)->pdg_id()) == 11 || abs((*p)->pdg_id()) == 13  )  nLeptons++;       
      }
      if (nLeptons == 3) {
        accepted = true;
        break;
      }
   }

    delete myGenEvent; 

   if (accepted) {
    return true; 
   } else { 
    return false;
   }

}


/*
// ------------ method called once each job just before starting event loop  ------------

// ------------ method called once each job just after ending the event loop  ------------
void 
HZZ4lFilter::endJob() {
}
*/