HTXSRivetProducer.cc

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/* \class HTXSRivetProducer
 *
 * \author David Sperka, University of Florida
 *
 * $Id: HTXSRivetProducer.cc,v 1.1 2016/09/27 13:07:29 dsperka Exp $
 *
 */

#include "FWCore/Framework/interface/one/EDProducer.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Framework/interface/Run.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

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

#include "Rivet/AnalysisHandler.hh"
#include "GeneratorInterface/RivetInterface/src/HiggsTemplateCrossSections.cc"
#include "SimDataFormats/HTXS/interface/HiggsTemplateCrossSections.h"

#include <vector>
#include <cstdio>
#include <cstring>


using namespace Rivet;
using namespace edm;
using namespace std;

class HTXSRivetProducer : public edm::one::EDProducer<edm::one::WatchRuns,edm::one::SharedResources> {
public:
    
    explicit HTXSRivetProducer(const edm::ParameterSet& cfg) : 
        _hepmcCollection(consumes<HepMCProduct>(cfg.getParameter<edm::InputTag>("HepMCCollection"))),
        _lheRunInfo(consumes<LHERunInfoProduct,edm::InRun>(cfg.getParameter<edm::InputTag>("LHERunInfo")))
    {
        usesResource("Rivet");
        
        _HTXS = new Rivet::HiggsTemplateCrossSections();
        
        _isFirstEvent = true;
        _prodMode = cfg.getParameter<string>("ProductionMode");
        m_HiggsProdMode = HTXS::UNKNOWN;
        
        produces<HTXS::HiggsClassification>("HiggsClassification").setBranchAlias("HiggsClassification");

    }
    ~HTXSRivetProducer() ;
    
private:
    
    void produce( edm::Event&, const edm::EventSetup&) ;
    
    void beginRun(edm::Run const& iRun, edm::EventSetup const& es) override ;
    void endRun(edm::Run const& iRun, edm::EventSetup const& es) override ;
    
    edm::EDGetTokenT<edm::HepMCProduct> _hepmcCollection;
    edm::EDGetTokenT<LHERunInfoProduct> _lheRunInfo;
    
    Rivet::AnalysisHandler _analysisHandler;
    Rivet::HiggsTemplateCrossSections* _HTXS;
    
    bool _isFirstEvent;
    std::string _prodMode;
    HTXS::HiggsProdMode m_HiggsProdMode;
    
    HTXS::HiggsClassification cat_;
    
};

HTXSRivetProducer::~HTXSRivetProducer(){
}

void HTXSRivetProducer::produce( edm::Event & iEvent, const edm::EventSetup & ) {
    
    //get the hepmc product from the event
    edm::Handle<HepMCProduct> evt;

    bool product_exists = iEvent.getByToken(_hepmcCollection, evt);
    if( product_exists ){
    
      // get HepMC GenEvent
      const HepMC::GenEvent *myGenEvent = evt->GetEvent();
      
      if (_prodMode == "AUTO") {
          
          // for these prod modes, don't change what is set in BeginRun
          if (m_HiggsProdMode != HTXS::GGF && m_HiggsProdMode != HTXS::VBF && m_HiggsProdMode != HTXS::GG2ZH) {
              
              unsigned nWs = 0;
              unsigned nZs = 0;
              unsigned nTs = 0;
              unsigned nBs = 0;
              unsigned nHs = 0;
              
              HepMC::GenVertex *HSvtx = myGenEvent->signal_process_vertex();
              
              if(HSvtx){
                for (auto ptcl:particles(HSvtx,HepMC::children)) {
                    if (std::abs(ptcl->pdg_id()) == 24) ++nWs;
                    if (ptcl->pdg_id() == 23) ++nZs;
                    if (abs(ptcl->pdg_id()) == 6) ++nTs;
                    if (abs(ptcl->pdg_id()) == 5) ++nBs;
                    if (ptcl->pdg_id() == 25) ++nHs;
                }
              }
                          
              if (nZs==1 && nHs==1 && (nWs+nTs)==0) {
                  m_HiggsProdMode = HTXS::QQ2ZH;
              } else if (nWs==1 && nHs==1 && (nZs+nTs)==0) {
                  m_HiggsProdMode = HTXS::WH; 
              } else if (nTs==2 && nHs==1 && nZs==0) {
                  m_HiggsProdMode = HTXS::TTH; 
              } else if (nTs==1 && nHs==1 && nZs==0) {
                  m_HiggsProdMode = HTXS::TH; 
              } else if (nBs==2 && nHs==1 && nZs==0) {
                  m_HiggsProdMode = HTXS::BBH; 
              }
              
              _HTXS->setHiggsProdMode(m_HiggsProdMode);
              
          }
      }
      

      if (_isFirstEvent){

    _analysisHandler.addAnalysis(_HTXS);

          // set the production mode if not done already
          if      ( _prodMode == "GGF"   ) m_HiggsProdMode = HTXS::GGF;
          else if ( _prodMode == "VBF"   ) m_HiggsProdMode = HTXS::VBF;
          else if ( _prodMode == "WH"    ) m_HiggsProdMode = HTXS::WH;
          else if ( _prodMode == "ZH"    ) m_HiggsProdMode = HTXS::QQ2ZH;
          else if ( _prodMode == "QQ2ZH" ) m_HiggsProdMode = HTXS::QQ2ZH;
          else if ( _prodMode == "GG2ZH" ) m_HiggsProdMode = HTXS::GG2ZH;
          else if ( _prodMode == "TTH"   ) m_HiggsProdMode = HTXS::TTH;
          else if ( _prodMode == "BBH"   ) m_HiggsProdMode = HTXS::BBH;
          else if ( _prodMode == "TH"    ) m_HiggsProdMode = HTXS::TH;
          else if ( _prodMode == "AUTO"  ) {
              edm::LogInfo ("HTXSRivetProducer") <<"Using AUTO for HiggsProdMode, found it to be: "<<m_HiggsProdMode<< "\n";
              edm::LogInfo ("HTXSRivetProducer") <<"(UNKNOWN=0, GGF=1, VBF=2, WH=3, QQ2ZH=4, GG2ZH=5, TTH=6, BBH=7, TH=8)"<<endl;
          } else {
              throw cms::Exception("HTXSRivetProducer") << "ProductionMode must be one of: GGF,VBF,WH,ZH,QQ2ZH,GG2ZH,TTH,BBH,TH,AUTO " ; 
          }
          _HTXS->setHiggsProdMode(m_HiggsProdMode);

          // at this point the production mode must be known
          if (m_HiggsProdMode == HTXS::UNKNOWN) {
              edm::LogInfo ("HTXSRivetProducer") << "HTXSRivetProducer WARNING: HiggsProduction mode is UNKNOWN" << endl;
          }            

          // initialize rivet analysis
          _analysisHandler.init(*myGenEvent);
          _isFirstEvent = false;

      }

      // classify the event
      Rivet::HiggsClassification rivet_cat = _HTXS->classifyEvent(*myGenEvent,m_HiggsProdMode);
      cat_ = HTXS::Rivet2Root(rivet_cat);

      unique_ptr<HTXS::HiggsClassification> cat( new HTXS::HiggsClassification( cat_ ) ); 

      iEvent.put(std::move(cat),"HiggsClassification");
    }
}

void HTXSRivetProducer::endRun(edm::Run const& iRun, edm::EventSetup const& es) 
{
  _HTXS->printClassificationSummary();
}

void HTXSRivetProducer::beginRun(edm::Run const& iRun, edm::EventSetup const& es) {

    if (_prodMode == "AUTO") {    

        edm::Handle<LHERunInfoProduct> run;
        bool product_exists = iRun.getByLabel( edm::InputTag("externalLHEProducer"), run );
        if( product_exists ){
           
          typedef std::vector<LHERunInfoProduct::Header>::const_iterator headers_const_iterator;
          LHERunInfoProduct myLHERunInfoProduct = *(run.product());
          for (headers_const_iterator iter=myLHERunInfoProduct.headers_begin(); iter!=myLHERunInfoProduct.headers_end(); iter++){
              std::vector<std::string> lines = iter->lines();
              for (unsigned int iLine = 0; iLine<lines.size(); iLine++) {
                  std::string line=lines.at(iLine);
                  // POWHEG
                  if (line.find("gg_H_quark-mass-effects") != std::string::npos) {
                      edm::LogInfo ("HTXSRivetProducer") <<iLine<< " "<<line<<std::endl;
                      m_HiggsProdMode = HTXS::GGF;
                      break;
                  }
                  if (line.find("Process: HJ") != std::string::npos) {
                      edm::LogInfo ("HTXSRivetProducer") <<iLine<< " "<<line<<std::endl;
                      m_HiggsProdMode = HTXS::GGF;
                      break;
                  }
                  if (line.find("Process: HJJ") != std::string::npos) {
                      edm::LogInfo ("HTXSRivetProducer") <<iLine<< " "<<line<<std::endl;
                      m_HiggsProdMode = HTXS::GGF;
                      break;
                  }
                  if (line.find("VBF_H") != std::string::npos) {
                      edm::LogInfo ("HTXSRivetProducer") <<iLine<< " "<<line<<std::endl;
                      m_HiggsProdMode = HTXS::VBF;
                      break;
                  }
                  if (line.find("HZJ") != std::string::npos) {
                      edm::LogInfo ("HTXSRivetProducer") <<iLine<< " "<<line<<std::endl;
                      m_HiggsProdMode = HTXS::QQ2ZH;
                      break;
                  }
                  if (line.find("ggHZ") != std::string::npos) {
                      edm::LogInfo ("HTXSRivetProducer") <<iLine<< " "<<line<<std::endl;
                      m_HiggsProdMode = HTXS::GG2ZH;
                      break;
                  }
                  // MC@NLO
                  if (line.find("ggh012j") != std::string::npos) {
                      edm::LogInfo ("HTXSRivetProducer") <<iLine<< " "<<line<<std::endl;
                      m_HiggsProdMode = HTXS::GGF;
                      break;
                  }
                  if (line.find("vbfh") != std::string::npos) {
                      edm::LogInfo ("HTXSRivetProducer") <<iLine<< " "<<line<<std::endl;
                      m_HiggsProdMode = HTXS::VBF;
                      break;
                  }
                  if (line.find("zh012j") != std::string::npos) {
                      edm::LogInfo ("HTXSRivetProducer") <<iLine<< " "<<line<<std::endl;
                      m_HiggsProdMode = HTXS::QQ2ZH;
                      break;
                  }
                  if (line.find("ggzh01j") != std::string::npos) {
                      edm::LogInfo ("HTXSRivetProducer") <<iLine<< " "<<line<<std::endl;
                      m_HiggsProdMode = HTXS::GG2ZH;
                      break;
                  }
              }
                
              if ( m_HiggsProdMode != HTXS::UNKNOWN) break;
        }
      }
    }
}


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

DEFINE_FWK_MODULE( HTXSRivetProducer );