LeptonSkimming.cc

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// -*- C++ -*-
//
// Package:    SkimmingForB/LeptonSkimming
// Class:      LeptonSkimming
// 
//
// Original Author:  Georgios Karathanasis georgios.karathanasis@cern.ch
//         Created:  Thu, 29 Nov 2018 15:23:09 GMT
//
//


#include "Configuration/Skimming/interface/LeptonSkimming.h"


using namespace edm;
using namespace reco;
using namespace std;

LeptonSkimming::LeptonSkimming(const edm::ParameterSet& iConfig):
  electronsToken_(consumes<std::vector<reco::GsfElectron> >(iConfig.getParameter<edm::InputTag>  ("electrons"))),
   eleBWPToken_(consumes<edm::ValueMap<float> >(iConfig.getParameter<edm::InputTag>("eleBiasedWP"))),
  eleUnBWPToken_(consumes<edm::ValueMap<float> >(iConfig.getParameter<edm::InputTag>("eleUnbiasedWP"))),
  muonsToken_(consumes<std::vector<reco::Muon>>(iConfig.getParameter<edm::InputTag>("muons"))),
  Tracks_(consumes<std::vector<reco::Track> >(iConfig.getParameter<edm::InputTag>("tracks"))),
  vtxToken_(consumes<std::vector<reco::Vertex>>(iConfig.getParameter<edm::InputTag>("vertices"))),
  beamSpotToken_(consumes<reco::BeamSpot>(iConfig.getParameter<edm::InputTag>("beamSpot"))),
  conversionsToken_(consumes< reco::ConversionCollection > (iConfig.getParameter<edm::InputTag> ("conversions"))),

   trgresultsToken_(consumes<edm::TriggerResults>(iConfig.getParameter<edm::InputTag> ("triggerresults"))),
  trigobjectsToken_(consumes<trigger::TriggerEvent>(iConfig.getParameter<edm::InputTag> ("triggerobjects"))),
  HLTFilter_(iConfig.getParameter<vector<string> >("HLTFilter")),
  HLTPath_(iConfig.getParameter<vector<string> >("HLTPath"))
  {
  edm::ParameterSet runParameters=iConfig.getParameter<edm::ParameterSet>("RunParameters");     
 //mu matching with trigger
 MuTrgMatchCone=runParameters.getParameter<double>("MuTrgMatchCone");
 SkipIfNoMuMatch=runParameters.getParameter<bool>("SkipIfNoMuMatch");
 //track cuts
 PtTrack_Cut=runParameters.getParameter<double>("PtTrack_Cut");
 EtaTrack_Cut=runParameters.getParameter<double>("EtaTrack_Cut");
 MinChi2Track_Cut=runParameters.getParameter<double>("MinChi2Track_Cut");
 MaxChi2Track_Cut=runParameters.getParameter<double>("MaxChi2Track_Cut");
 MuTrkMinDR_Cut=runParameters.getParameter<double>("MuTrkMinDR_Cut");
 TrackMuDz_Cut=runParameters.getParameter<double>("TrackMuDz_Cut");
 TrgExclusionCone=runParameters.getParameter<double>("TrgExclusionCone");
 //lepton cuts
 PtMu_Cut=runParameters.getParameter<double>("PtMu_Cut");
 PtEl_Cut=runParameters.getParameter<double>("PtEl_Cut");
 QualMu_Cut=runParameters.getParameter<double>("QualMu_Cut");
 MuTrgExclusionCone=runParameters.getParameter<double>("MuTrgExclusionCone");
 ElTrgExclusionCone=runParameters.getParameter<double>("ElTrgExclusionCone");
 TrkObjExclusionCone=runParameters.getParameter<double>("TrkObjExclusionCone");
 MuTrgMuDz_Cut=runParameters.getParameter<double>("MuTrgMuDz_Cut");
 ElTrgMuDz_Cut=runParameters.getParameter<double>("ElTrgMuDz_Cut");
 BiasedWP=runParameters.getParameter<double>("BiasedWP");
 UnbiasedWP=runParameters.getParameter<double>("UnbiasedWP");
 SkimOnlyMuons=runParameters.getParameter<bool>("SkimOnlyMuons");
 SkimOnlyElectrons=runParameters.getParameter<bool>("SkimOnlyElectrons");
 //pair cuts
 MaxMee_Cut=runParameters.getParameter<double>("MaxMee_Cut");
 MinMee_Cut=runParameters.getParameter<double>("MinMee_Cut");
 Probee_Cut=runParameters.getParameter<double>("Probee_Cut");
 Cosee_Cut=runParameters.getParameter<double>("Cosee_Cut");
 EpairZvtx_Cut=runParameters.getParameter<double>("EpairZvtx_Cut");
 //kaon
 PtKTrack_Cut=runParameters.getParameter<double>("PtKTrack_Cut");
 TrackSdxy_Cut=runParameters.getParameter<double>("TrackSdxy_Cut");
 Ksdxy_Cut=runParameters.getParameter<double>("Ksdxy_Cut");
 //triplet
 MaxMB_Cut=runParameters.getParameter<double>("MaxMB_Cut");
 MinMB_Cut=runParameters.getParameter<double>("MinMB_Cut");  
 ProbeeK_Cut=runParameters.getParameter<double>("ProbeeK_Cut");
 CoseeK_Cut=runParameters.getParameter<double>("CoseeK_Cut"); 
 SLxy_Cut=runParameters.getParameter<double>("SLxy_Cut");
 PtB_Cut=runParameters.getParameter<double>("PtB_Cut");
 
 ObjPtLargerThanTrack=runParameters.getParameter<bool>("ObjPtLargerThanTrack");

}


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

}


bool LeptonSkimming::hltFired(const edm::Event& iEvent, const edm::EventSetup& iSetup,std::vector<string> HLTPath ){
  using namespace std;  using namespace edm;  using namespace reco;
  using namespace trigger;
 
  edm::Handle<edm::TriggerResults> trigResults;
  iEvent.getByToken(trgresultsToken_, trigResults);
  bool fire= false;
  if( trigResults.failedToGet() ) return false;
  for (unsigned int ip=0; ip<HLTPath.size(); ip++){
  int N_Triggers = trigResults->size();
  const edm::TriggerNames & trigName = iEvent.triggerNames(*trigResults);    
  for( int i_Trig = 0; i_Trig < N_Triggers; ++i_Trig ) {
    if (!trigResults->accept(i_Trig))   continue;
    const std::string & TrigPath =trigName.triggerName(i_Trig); 
    if (TrigPath.find(HLTPath[ip]) != std::string::npos) fire=true;
    } 
  }
  return fire;
}

std::array<float,5> LeptonSkimming::hltObject(const edm::Event& iEvent, const edm::EventSetup& iSetup,std::vector<string> Seed ){
  using namespace std;  using namespace edm;  using namespace reco;
  using namespace trigger;
 
  edm::Handle<trigger::TriggerEvent> triggerObjectsSummary;
  iEvent.getByToken(trigobjectsToken_ ,triggerObjectsSummary);
  trigger::TriggerObjectCollection selectedObjects;

  std::vector<std::array<float,5>> max_per_trigger; 

for (unsigned int ipath=0; ipath<Seed.size(); ipath++){ 
  std::vector<std::array<float, 5>> tot_tr_obj_pt_eta_phi;
  if (!triggerObjectsSummary.isValid()) continue;
    size_t filterIndex = (*triggerObjectsSummary).filterIndex(InputTag(Seed[ipath],"","HLT"));
    trigger::TriggerObjectCollection allTriggerObjects = triggerObjectsSummary->getObjects();     
    if (filterIndex < (*triggerObjectsSummary).sizeFilters()) { 
      const trigger::Keys &keys = (*triggerObjectsSummary).filterKeys(filterIndex);
      for (size_t j = 0; j < keys.size(); j++) {
        const trigger::TriggerObject & foundObject = (allTriggerObjects)[keys[j]];
        std::array<float, 5> tr_obj_pt_eta_phi;
        if (fabs(foundObject.id())!=13) continue;
        tr_obj_pt_eta_phi[0]=foundObject.pt();
        tr_obj_pt_eta_phi[1]=foundObject.eta();
        tr_obj_pt_eta_phi[2]=foundObject.phi();
        tr_obj_pt_eta_phi[3]=foundObject.id()/fabs(foundObject.id());
        tot_tr_obj_pt_eta_phi.push_back(tr_obj_pt_eta_phi);
      }  
    }
    //take the max per hlt
    if (!tot_tr_obj_pt_eta_phi.empty()){
      std::sort(tot_tr_obj_pt_eta_phi.begin(),tot_tr_obj_pt_eta_phi.end(),
               [](const std::array<float, 5>& a, const std::array<float, 5>& b) {
               return a[0] > b[0];
                });
       max_per_trigger.push_back(tot_tr_obj_pt_eta_phi.at(0));   }
    } 
//we know that at least a trigger fired
//find the total max
  std::sort( max_per_trigger.begin(), max_per_trigger.end(),
         [](const std::array<float,5>& a, const std::array<float,5>& b) {
               return a[0] > b[0];
                });
  return  max_per_trigger.at(0);
}




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

  test_ev++;
  //Get a few collections to apply basic electron ID
  //Get electrons
  edm::Handle<std::vector<reco::GsfElectron> > electrons;
  iEvent.getByToken(electronsToken_, electrons);
  //get bdt values
  edm::Handle<edm::ValueMap<float> > ele_mva_wp_biased;
  iEvent.getByToken( eleBWPToken_ ,ele_mva_wp_biased);
  edm::Handle<edm::ValueMap<float> > ele_mva_wp_unbiased;
  iEvent.getByToken( eleUnBWPToken_ ,ele_mva_wp_unbiased);
  //get muons
  edm::Handle<std::vector<reco::Muon>> muons;
   iEvent.getByToken(muonsToken_,muons);
  //Get conversions
  edm::Handle<reco::ConversionCollection> conversions;
  iEvent.getByToken(conversionsToken_, conversions);    
  // Get the beam spot
  edm::Handle<reco::BeamSpot> theBeamSpot;
  iEvent.getByToken(beamSpotToken_,theBeamSpot);  
  //Get vertices 
  edm::Handle<std::vector<reco::Vertex>> vertices;
  iEvent.getByToken(vtxToken_, vertices);
  //continue if there are no vertices
  if (vertices->empty()) return false;
  edm::Handle<vector<reco::Track>> tracks;
  iEvent.getByToken(Tracks_, tracks);
  edm::Handle<edm::TriggerResults> trigResults;
  iEvent.getByToken(trgresultsToken_, trigResults);
  edm::ESHandle<MagneticField> bFieldHandle;
  iSetup.get<IdealMagneticFieldRecord>().get(bFieldHandle);
  KalmanVertexFitter theKalmanFitter(false);
  TransientVertex LLvertex;
  
 
  // trigger1=0; trigger2=0; trigger3=0; trigger4=0; trigger5=0; trigger6=0;
  nmuons=0; nel=0; ntracks=0;
    
  SelectedMu_index=-1;
  SelectedMu_DR=std::numeric_limits<float>::max(); muon_pt.clear(); muon_eta.clear(); muon_phi.clear();
  Result=false;  el_pt.clear(); el_eta.clear(); el_phi.clear();
  Trk_container.clear();  MuTracks.clear();  ElTracks.clear(); 
  object_container.clear(); object_id.clear();  cleanedTracks.clear(); 
  Epair_ObjectId.clear(); muon_soft.clear(); muon_medium.clear(); muon_tight.clear();
  Epair_ObjectIndex.clear(); cleanedObjTracks.clear(); cleanedPairTracks.clear();
    Epair_ObjectIndex.clear(); Epair_ObjectId.clear(); Epair_TrkIndex.clear();
  //internal stuff
   ZvertexTrg=-1*std::numeric_limits<float>::max();
   std::array<float,5> SelectedTrgObj_PtEtaPhiCharge{ {-999,-999,-999,-999,-999}} ;
   vertex_point.SetCoordinates(-1*std::numeric_limits<float>::max(),-1*std::numeric_limits<float>::max(),-1*std::numeric_limits<float>::max());
   for (const reco::Vertex& vtx : *vertices) {
     bool isFake = vtx.isFake();
     if (isFake) continue;
     vertex_point.SetCoordinates(vtx.x(),vtx.y(),vtx.z());
     if (vertex_point.x()!=-1*std::numeric_limits<float>::max()) break;
    }
   if (vertex_point.x()==-1*std::numeric_limits<float>::max())
         return false;

   beam_x= theBeamSpot->x0(); beam_y= theBeamSpot->y0(); beam_z= theBeamSpot->z0();
  if(!hltFired(iEvent,iSetup,HLTPath_)) 
    return false;   
      
  SelectedTrgObj_PtEtaPhiCharge=hltObject(iEvent,iSetup,HLTFilter_);
  SelectedMu_DR=std::numeric_limits<float>::max(); 
  MuTracks.clear();  object_container.clear(); object_id.clear(); nmuons=0;
  for (const reco::Muon  &mu: *muons){
    if (fabs(mu.eta())>EtaTrack_Cut) continue;
    //find triggering muon
    float deltaRmu=deltaR(mu.eta(),mu.phi(), SelectedTrgObj_PtEtaPhiCharge[1], SelectedTrgObj_PtEtaPhiCharge[2]);
    if ( deltaRmu<MuTrgMatchCone &&  SelectedMu_DR>deltaRmu ){
        SelectedMu_DR=deltaR(mu.eta(),mu.phi(), SelectedTrgObj_PtEtaPhiCharge[1], SelectedTrgObj_PtEtaPhiCharge[2]);
        ZvertexTrg=mu.vz();}
    //save muons that we want to skim
    if (!SkimOnlyElectrons){
      bool tight=false,soft=false;
      if(vertices.isValid()){
        tight=isTightMuonCustom(*(&mu),(*vertices)[0]);
        soft=muon::isSoftMuon(*(&mu),(*vertices)[0]);
       }    
       const Track * mutrack= mu.bestTrack();
       muon_medium.push_back(isMediumMuonCustom(*(&mu)));    
       muon_tight.push_back(tight); muon_soft.push_back(soft);
       muon_pt.push_back(mu.pt()); muon_eta.push_back(mu.eta()); muon_phi.push_back(mu.phi()); 
       auto muTrack=std::make_shared<reco::Track>(*mutrack);
       MuTracks.push_back(muTrack);
       object_container.push_back(nmuons);
       object_id.push_back(13);    
       nmuons++;}
    
  }
  
  if (SelectedMu_DR==std::numeric_limits<float>::max() && SkipIfNoMuMatch){
      return false;
   }
  

  //Save electrons we want to skim
  ElTracks.clear();
  if (!SkimOnlyMuons){
    unsigned int count_el=-1;
   for(const reco::GsfElectron &el : *electrons){  
      count_el++;
      bool passConvVeto = !ConversionTools::hasMatchedConversion(*(&el), conversions, theBeamSpot->position());
      if (!passConvVeto) continue;   
      reco::GsfTrackRef seed = el.gsfTrack();
      if ( seed.isNull() ) continue;
      if ((*ele_mva_wp_biased)[seed] <BiasedWP) continue;
      if ((*ele_mva_wp_unbiased)[seed] <UnbiasedWP) continue;
      const Track * eltrack= el.bestTrack();
      if (fabs(eltrack->eta())>EtaTrack_Cut) continue;
      if (eltrack->pt()<PtEl_Cut) continue;
      auto ElTrack=std::make_shared<reco::Track>(*eltrack);
      ElTracks.push_back(ElTrack); object_container.push_back(nel);
      el_pt.push_back(eltrack->pt()); el_eta.push_back(eltrack->eta()); el_phi.push_back(eltrack->phi());
      nel++; object_id.push_back(11);
   }
  }

  //Save tracks we want to skim: used both as mu or e candidate
  cleanedTracks.clear(); 
  trk_index=0;  
  for (const reco::Track& trk : *tracks){
   if (!trk.quality(Track::highPurity)) continue;
   if (trk.pt()<PtTrack_Cut) continue;
   if (fabs(trk.eta())>EtaTrack_Cut) continue;
   if(trk.charge()==0) continue;
   if(trk.normalizedChi2()>MaxChi2Track_Cut || trk.normalizedChi2()<MinChi2Track_Cut) continue;
   if (fabs(trk.dxy())/trk.dxyError()<TrackSdxy_Cut) continue;
   if (SelectedMu_DR<std::numeric_limits<float>::max() ){
     if (fabs(ZvertexTrg-trk.vz())>TrackMuDz_Cut ) continue;
     if ( deltaR(trk.eta(),trk.phi(),SelectedTrgObj_PtEtaPhiCharge[1],SelectedTrgObj_PtEtaPhiCharge[2])<TrgExclusionCone) continue;
   }
   //assignments   
   auto cleanTrack=std::make_shared<reco::Track>(trk);
   cleanedTracks.push_back(cleanTrack);
   Trk_container.push_back(trk_index);
   trk_index++;
 }
 
    //create ll combination
 
    // fit track pairs
    cleanedObjTracks.clear(); cleanedPairTracks.clear();     
    TLorentzVector vel1,vel2;
    std::vector<std::shared_ptr<reco::Track>> cleanedObjects; 
    //add tracks of objects    
    if (!SkimOnlyElectrons){
       for(auto & vec: MuTracks) cleanedObjects.push_back(vec);}
     
    if (!SkimOnlyMuons){
       for(auto & vec: ElTracks) cleanedObjects.push_back(vec);}

    if (cleanedObjects.empty())
       return false;

    for(auto& obj: cleanedObjects){
      auto tranobj=std::make_shared<reco::TransientTrack>(reco::TransientTrack(*obj,&(*bFieldHandle)));
      unsigned int iobj=&obj-&cleanedObjects[0];
      unsigned int index=object_container.at(iobj);
      float massLep=0.0005;
      if ( object_id.at(iobj)==13 ) massLep=0.105;
      //posible cut in mu quality
      if ( object_id.at(iobj)==13 && QualMu_Cut==1 && !muon_soft.at(index)) continue;
     if ( object_id.at(iobj)==13 && QualMu_Cut==2 && !muon_medium.at(index)) continue;
     if ( object_id.at(iobj)==13 && QualMu_Cut==3 && !muon_tight.at(index)) continue;
     // take the corresponding lepton track for lorentz vector
     vel1.SetPtEtaPhiM(obj->pt(),obj->eta(),obj->phi(),massLep);
     if (object_id.at(iobj)==13 && vel1.Pt()<PtMu_Cut) continue;
     for(auto& trk2: cleanedTracks){
    unsigned int itrk2=&trk2-&cleanedTracks[0];
        //opposite sign
        if (obj->charge()*trk2->charge()==1) continue;
        if (ObjPtLargerThanTrack && vel1.Pt()<trk2->pt()) continue;
        vel2.SetPtEtaPhiM(trk2->pt(),trk2->eta(),trk2->phi(),massLep);
        //probe side cuts
        if (object_id.at(iobj)==13 && deltaR(obj->eta(),obj->phi(),SelectedTrgObj_PtEtaPhiCharge[1],SelectedTrgObj_PtEtaPhiCharge[2])<MuTrgExclusionCone) continue;
        if (object_id.at(iobj)==11 && deltaR(obj->eta(),obj->phi(),SelectedTrgObj_PtEtaPhiCharge[1],SelectedTrgObj_PtEtaPhiCharge[2])<ElTrgExclusionCone) continue;
        if (SelectedMu_DR<std::numeric_limits<float>::max() ){
       if (object_id.at(iobj)==13 && fabs(ZvertexTrg- obj->vz())>MuTrgMuDz_Cut ) continue;
           if (object_id.at(iobj)==11 && fabs(ZvertexTrg-obj->vz())>ElTrgMuDz_Cut ) continue;
         }
        //additional cuts
        float InvMassLepLep=(vel1+vel2).M();
        if (InvMassLepLep>MaxMee_Cut || InvMassLepLep<MinMee_Cut ) continue;   
        auto trantrk2=std::make_shared<reco::TransientTrack>(reco::TransientTrack(*trk2,&(*bFieldHandle)));
        std::vector<reco::TransientTrack> tempTracks;
        tempTracks.reserve(2);
        tempTracks.push_back(*tranobj); tempTracks.push_back(*trantrk2);
        LLvertex = theKalmanFitter.vertex(tempTracks);
        if (!LLvertex.isValid()) continue;
        if (ChiSquaredProbability(LLvertex.totalChiSquared(),LLvertex.degreesOfFreedom())<Probee_Cut)  continue;
        if (ZvertexTrg>-1*std::numeric_limits<float>::max() && fabs(ZvertexTrg-LLvertex.position().z())>EpairZvtx_Cut ) continue;
        GlobalError err =LLvertex.positionError();
        GlobalPoint Dispbeamspot(-1*((theBeamSpot->x0()-LLvertex.position().x())+(LLvertex.position().z()-theBeamSpot->z0()) * theBeamSpot->dxdz()),-1*((theBeamSpot->y0()-LLvertex.position().y())+ (LLvertex.position().z()-theBeamSpot->z0()) * theBeamSpot->dydz()), 0);
        math::XYZVector pperp((vel1+vel2).Px(),(vel1+vel2).Py(),0);
        math::XYZVector vperp(Dispbeamspot.x(),Dispbeamspot.y(),0.);
        float tempCos=vperp.Dot(pperp)/(vperp.R()*pperp.R());
        if (tempCos<Cosee_Cut) continue;
        cleanedObjTracks.push_back(obj);
        cleanedPairTracks.push_back(trk2);
        Epair_ObjectIndex.push_back(object_container.at(iobj));
        Epair_ObjectId.push_back(object_id.at(iobj));
        Epair_TrkIndex.push_back(Trk_container.at(itrk2));           
    }
    }
    
    // B recontrsuction
    TLorentzVector vK; 
    for(unsigned int iobj=0; iobj<cleanedObjTracks.size(); iobj++){
      auto objtrk=cleanedObjTracks.at(iobj);
      auto pairtrk=cleanedPairTracks.at(iobj);
      auto tranobj=std::make_shared<reco::TransientTrack>(reco::TransientTrack(*objtrk,&(*bFieldHandle)));
      auto tranpair=std::make_shared<reco::TransientTrack>(reco::TransientTrack(*pairtrk,&(*bFieldHandle)));
      //unsigned int index=Epair_ObjectIndex.at(iobj);
      float massLep=0.0005;
      if ( Epair_ObjectId.at(iobj)==13) massLep=0.105;        
      vel1.SetPtEtaPhiM(objtrk->pt(),objtrk->eta(),objtrk->phi(),massLep);      
      vel2.SetPtEtaPhiM(pairtrk->pt(),pairtrk->eta(),pairtrk->phi(),massLep);  
      for(auto & trk: cleanedTracks){
         //reject track corresponding to mu or e
         if( trk->charge()==objtrk->charge() && deltaR(objtrk->eta(),objtrk->phi(),trk->eta(),trk->phi())<TrkObjExclusionCone) continue;
     if (trk->pt()<PtKTrack_Cut) continue;
         if (fabs(trk->dxy(vertex_point))/trk->dxyError()<Ksdxy_Cut) continue;
         // skip the track that was used as mu or e                 
         if (Epair_TrkIndex.at(iobj)==&trk-&cleanedTracks[0]) continue;
         vK.SetPtEtaPhiM(trk->pt(),trk->eta(),trk->phi(),0.493);
         //final cuts
         float InvMass=(vel1+vel2+vK).M();
         if (InvMass> MaxMB_Cut || InvMass<MinMB_Cut) continue;
         if ((vel1+vel2+vK).Pt()<PtB_Cut) continue;
         auto trantrk=std::make_shared<reco::TransientTrack>(reco::TransientTrack(*trk,&(*bFieldHandle)));
         std::vector<reco::TransientTrack> tempTracks;
         tempTracks.reserve(3);
         tempTracks.push_back(*tranobj); tempTracks.push_back(*tranpair);
         tempTracks.push_back(*trantrk);     
         LLvertex = theKalmanFitter.vertex(tempTracks);
     if (!LLvertex.isValid()) continue;
     if (ChiSquaredProbability(LLvertex.totalChiSquared(),LLvertex.degreesOfFreedom())<ProbeeK_Cut) continue;
     GlobalError err =LLvertex.positionError();
         GlobalPoint Dispbeamspot(-1*((theBeamSpot->x0()-LLvertex.position().x())+(LLvertex.position().z()-theBeamSpot->z0()) * theBeamSpot->dxdz()),-1*((theBeamSpot->y0()-LLvertex.position().y())+ (LLvertex.position().z()-theBeamSpot->z0()) * theBeamSpot->dydz()), 0);
         math::XYZVector pperp((vel1+vel2+vK).Px(),(vel1+vel2+vK).Py(),0);
         math::XYZVector vperp(Dispbeamspot.x(),Dispbeamspot.y(),0.);
         float tempCos=vperp.Dot(pperp)/(vperp.R()*pperp.R());
         if (tempCos<CoseeK_Cut) continue;
         if (SLxy_Cut>Dispbeamspot.perp()/sqrt(err.rerr(Dispbeamspot))) continue;
         Result=true;
     break;
     }
      if (Result) break;
    }
    //decission
     return Result;
   
}

// ------------ method called once each stream before processing any runs, lumis or events  ------------
void
LeptonSkimming::beginStream(edm::StreamID)
{
}

// ------------ method called once each stream after processing all runs, lumis and events  ------------
void
LeptonSkimming::endStream() {
}

// ------------ method called when starting to processes a run  ------------
/*
void
LeptonSkimming::beginRun(edm::Run const&, edm::EventSetup const&)
{ 
}
*/
 
// ------------ method called when ending the processing of a run  ------------
/*
void
LeptonSkimming::endRun(edm::Run const&, edm::EventSetup const&)
{
}
*/
 
// ------------ method called when starting to processes a luminosity block  ------------
/*
void
LeptonSkimming::beginLuminosityBlock(edm::LuminosityBlock const&, edm::EventSetup const&)
{
}
*/
 
// ------------ method called when ending the processing of a luminosity block  ------------
/*
void
LeptonSkimming::endLuminosityBlock(edm::LuminosityBlock const&, edm::EventSetup const&)
{
}
*/
 
// ------------ method fills 'descriptions' with the allowed parameters for the module  ------------
void
LeptonSkimming::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
  //The following says we do not know what parameters are allowed so do no validation
  // Please change this to state exactly what you do use, even if it is no parameters
  edm::ParameterSetDescription desc;
  desc.setUnknown();
  descriptions.addDefault(desc);
}
//define this as a plug-in
DEFINE_FWK_MODULE(LeptonSkimming);