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// $Id: GenFakesMod.cc,v 1.6 2009/08/11 11:19:40 phedex Exp $
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#include "MitPhysics/FakeMods/interface/GenFakesMod.h"
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#include "MitCommon/MathTools/interface/MathUtils.h"
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#include "MitAna/DataUtil/interface/Debug.h"
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#include "MitAna/DataTree/interface/ElectronCol.h"
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#include "MitAna/DataTree/interface/MuonCol.h"
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#include "MitAna/DataTree/interface/PhotonCol.h"
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#include "MitAna/DataTree/interface/JetCol.h"
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#include "MitAna/DataTree/interface/ParticleCol.h"
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#include "MitAna/DataTree/interface/MCParticleCol.h"
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#include "MitPhysics/Init/interface/ModNames.h"
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#include "MitPhysics/FakeMods/interface/FakeEventHeader.h"
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#include "MitPhysics/FakeMods/interface/FakeRate.h"
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using namespace mithep;
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ClassImp(mithep::GenFakesMod)
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//--------------------------------------------------------------------------------------------------
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GenFakesMod::GenFakesMod(const char *name, const char *title) :
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BaseMod(name,title),
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fElectronFRFilename("InputRequired"),
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fMuonFRFilename("InputRequired"),
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fUse2DFakeRate(false),
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fUseFitFunction(false),
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fElectronFRFunctionName("InputRequired"),
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fMuonFRFunctionName("InputRequired"),
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fElectronFRHistName("InputRequired"),
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fMuonFRHistName("InputRequired"),
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fCleanElectronsName(ModNames::gkCleanElectronsName),
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fCleanMuonsName(ModNames::gkCleanMuonsName),
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fCleanPhotonsName(ModNames::gkCleanPhotonsName),
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fCleanJetsName(ModNames::gkCleanJetsName),
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fMCLeptonsName(ModNames::gkMCLeptonsName),
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fMCTausName(ModNames::gkMCTausName),
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fElFakeableObjsName(ModNames::gkElFakeableObjsName),
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fMuFakeableObjsName(ModNames::gkMuFakeableObjsName),
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fFakeEventHeadersName(ModNames::gkFakeEventHeadersName)
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{
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// Constructor.
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}
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//--------------------------------------------------------------------------------------------------
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void GenFakesMod::LoadFakeRate()
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{
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//Load FakeRate Probabilities.
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fFakeRate = new FakeRate(fElectronFRFilename,fMuonFRFilename,fElectronFRFunctionName,
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fMuonFRFunctionName,fElectronFRHistName,
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fMuonFRHistName,fUse2DFakeRate, fUseFitFunction );
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}
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//--------------------------------------------------------------------------------------------------
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void GenFakesMod::Process()
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{
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// Process entries of the tree.
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// get input Fakeable object collections
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const ElectronCol *ElFakeableObjs = 0;
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if (!fElFakeableObjsName.IsNull())
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ElFakeableObjs = GetObjThisEvt<ElectronCol>(fElFakeableObjsName);
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const MuonCol *MuFakeableObjs = 0;
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if (!fMuFakeableObjsName.IsNull())
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MuFakeableObjs = GetObjThisEvt<MuonCol>(fMuFakeableObjsName);
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// get input clean object collections
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const ElectronCol *CleanElectrons = 0;
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if (!fCleanElectronsName.IsNull())
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CleanElectrons = GetObjThisEvt<ElectronCol>(fCleanElectronsName);
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const MuonCol *CleanMuons = 0;
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if (!fCleanMuonsName.IsNull())
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CleanMuons = GetObjThisEvt<MuonCol>(fCleanMuonsName);
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const PhotonCol *CleanPhotons = 0;
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if (!fCleanPhotonsName.IsNull())
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CleanPhotons = GetObjThisEvt<PhotonCol>(fCleanPhotonsName);
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const JetCol *CleanJets = 0;
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if (!fCleanJetsName.IsNull())
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CleanJets = GetObjThisEvt<JetCol>(fCleanJetsName);
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mithep::ParticleOArr *CleanLeptons = dynamic_cast<mithep::ParticleOArr*>
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(FindObjThisEvt(ModNames::gkMergedLeptonsName));
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//get monte carlo collections
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const MCParticleCol *GenLeptons = 0;
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if (!fMCLeptonsName.IsNull())
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GenLeptons = GetObjThisEvt<MCParticleCol>(fMCLeptonsName);
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const MCParticleCol *GenTaus = 0;
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if (!fMCTausName.IsNull())
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GenTaus = GetObjThisEvt<MCParticleCol>(fMCTausName);
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ObjArray<MCParticle> *GenLeptonsAndTaus = new ObjArray<MCParticle>;
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if (GenLeptons) {
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for (UInt_t i=0; i<GenLeptons->GetEntries(); i++)
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GenLeptonsAndTaus->Add(GenLeptons->At(i));
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}
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if (GenTaus) {
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for (UInt_t i=0; i<GenTaus->GetEntries(); i++)
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GenLeptonsAndTaus->Add(GenTaus->At(i));
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}
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// create final output collection
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ObjArray <FakeEventHeader> *FakeEventHeaders = new ObjArray <FakeEventHeader> ;
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FakeEventHeaders->SetOwner(kTRUE);
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//initialize with one fake event containing no fake objects and all jets.
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FakeEventHeader *initialFakeEvent = new FakeEventHeader();
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for (UInt_t j=0;j<CleanJets->GetEntries();j++)
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initialFakeEvent->AddJets(CleanJets->At(j));
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FakeEventHeaders->AddOwned(initialFakeEvent);
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// *****************************************************************************************
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// Fake into Muons
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// Loop through all Muon Fakeable objects and consider the fake possibility.
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// *****************************************************************************************
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for (UInt_t n = 0; n < MuFakeableObjs->GetEntries(); ++n) {
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//make temporary fake event headers array
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ObjArray <FakeEventHeader> *tempFakeEventHeaders = new ObjArray <FakeEventHeader> ;
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tempFakeEventHeaders->SetOwner(kTRUE);
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//loop over all fake events generated so far - and perform an additional fake if necessary
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for (UInt_t i=0; i<FakeEventHeaders->GetEntries();i++) {
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// *****************************************************************************************
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// Determine if the fakeable object was a clean lepton
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// *****************************************************************************************
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Bool_t isCleanLepton = false;
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for (UInt_t j = 0; j < CleanLeptons->GetEntries() ; j++) {
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Double_t deltaR = MathUtils::DeltaR(MuFakeableObjs->At(n)->Phi(),
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MuFakeableObjs->At(n)->Eta(),
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CleanLeptons->At(j)->Phi(), CleanLeptons->At(j)->Eta());
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if (deltaR < 0.3) {
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isCleanLepton = true;
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break;
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}
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}
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// *****************************************************************************************
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// Determine if the fakeable object was a real muon from Monte Carlo
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// *****************************************************************************************
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Bool_t isGenMuon = false;
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for (UInt_t l=0; l<GenLeptonsAndTaus->GetEntries(); l++) {
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if (MathUtils::DeltaR(MuFakeableObjs->At(n)->Phi(), MuFakeableObjs->At(n)->Eta(),
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GenLeptonsAndTaus->At(l)->Phi(),
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GenLeptonsAndTaus->At(l)->Eta()) < 0.3) {
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isGenMuon = true;
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break;
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}
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}
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//this is used to determine the weight of the unfaked event.
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double totalCumulativeFakeProbability = 0.0;
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// *****************************************************************************************
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// Perform Muon Fake
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// *****************************************************************************************
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//match fake to one of the jets
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int fakeToJetMatch = -1; //index of the jet that matches to the fake
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double minDR = 5000;
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for (UInt_t jj=0;jj<FakeEventHeaders->At(i)->NJets();jj++) {
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Double_t deltaR = MathUtils::DeltaR(FakeEventHeaders->At(i)->UnfakedJet(jj)->Mom(),
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MuFakeableObjs->At(n)->Mom());
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if (deltaR < minDR) {
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minDR = deltaR;
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fakeToJetMatch = jj;
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}
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}
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if (!(minDR < 0.5)) {
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fakeToJetMatch = -1;
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}
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//Obtain the muon FakeRate
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Double_t muonFakeProb = 0.0;
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Double_t muonFakeProbStatErrorLow = 0.0;
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Double_t muonFakeProbStatErrorHigh = 0.0;
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Double_t muonFakeProbSysErrorLow = 0.0;
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Double_t muonFakeProbSysErrorHigh = 0.0;
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Double_t muonFakeProbErrorLow = 0.0;
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Double_t muonFakeProbErrorHigh = 0.0;
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if(fFakeRate) {
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muonFakeProb = fFakeRate->MuonFakeRate(MuFakeableObjs->At(n)->Et(),
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MuFakeableObjs->At(n)->Eta(),
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MuFakeableObjs->At(n)->Phi());
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muonFakeProbStatErrorLow = fFakeRate->MuonFakeRateStatErrorLow(MuFakeableObjs->At(n)->Et(),
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MuFakeableObjs->At(n)->Eta(),
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MuFakeableObjs->At(n)->Phi());
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muonFakeProbStatErrorHigh =
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fFakeRate->MuonFakeRateStatErrorHigh(MuFakeableObjs->At(n)->Et(),
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MuFakeableObjs->At(n)->Eta(),
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MuFakeableObjs->At(n)->Phi());
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muonFakeProbSysErrorLow = fFakeRate->MuonFakeRateSysErrorLow(MuFakeableObjs->At(n)->Et(),
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MuFakeableObjs->At(n)->Eta(),
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MuFakeableObjs->At(n)->Phi());
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muonFakeProbSysErrorHigh = fFakeRate->MuonFakeRateSysErrorHigh(MuFakeableObjs->At(n)->Et(),
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MuFakeableObjs->At(n)->Eta(),
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MuFakeableObjs->At(n)->Phi());
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muonFakeProbErrorLow = TMath::Sqrt(muonFakeProbStatErrorLow*muonFakeProbStatErrorLow +
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muonFakeProbSysErrorLow*muonFakeProbSysErrorLow);
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muonFakeProbErrorHigh = TMath::Sqrt(muonFakeProbStatErrorHigh*muonFakeProbStatErrorHigh +
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muonFakeProbSysErrorHigh*muonFakeProbSysErrorHigh);
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} else {
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Fatal("Process()","Error: fFakeRate is a NULL pointer.");
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}
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//only fake into a muon if the fakeable object did not match to a clean lepton
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if (!isCleanLepton) {
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//create new fake event header
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FakeEventHeader *fakeMuonEvent = new FakeEventHeader();
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fakeMuonEvent->SetWeight(FakeEventHeaders->At(i)->Weight() * muonFakeProb);
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Double_t weightLowError = 0;
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Double_t weightHighError = 0;
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if (muonFakeProb > 0) {
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weightLowError = FakeEventHeaders->At(i)->Weight()*muonFakeProb*
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TMath::Sqrt((FakeEventHeaders->At(i)->WeightLowError()/
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FakeEventHeaders->At(i)->Weight())*
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(FakeEventHeaders->At(i)->WeightLowError()/
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FakeEventHeaders->At(i)->Weight()) +
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(muonFakeProbErrorLow/muonFakeProb)*
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(muonFakeProbErrorLow/muonFakeProb));
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weightHighError = FakeEventHeaders->At(i)->Weight()*muonFakeProb*
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TMath::Sqrt((FakeEventHeaders->At(i)->WeightHighError()/
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FakeEventHeaders->At(i)->Weight())*
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(FakeEventHeaders->At(i)->WeightHighError()/
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FakeEventHeaders->At(i)->Weight()) +
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(muonFakeProbErrorHigh/muonFakeProb)*
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(muonFakeProbErrorHigh/muonFakeProb));
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}
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fakeMuonEvent->SetWeightLowError(weightLowError);
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fakeMuonEvent->SetWeightHighError(weightHighError);
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//add all previous fakes
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for (UInt_t f=0;f<FakeEventHeaders->At(i)->FakeObjsSize();f++) {
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fakeMuonEvent->AddFakeObject(FakeEventHeaders->At(i)->FakeObj(f));
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}
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//add new fake
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fakeMuonEvent->AddFakeObject(MuFakeableObjs->At(n),kMuon,isCleanLepton,isGenMuon);
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//add all previous jets except the one matching to the new fake
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for (UInt_t jj=0;jj<FakeEventHeaders->At(i)->NJets();jj++) {
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if ((int)jj != fakeToJetMatch)
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fakeMuonEvent->AddJets(FakeEventHeaders->At(i)->UnfakedJet(jj));
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}
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//add fake event to the temporary fake event header array
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tempFakeEventHeaders->AddOwned(fakeMuonEvent);
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//increase cumulative fake probability
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totalCumulativeFakeProbability += muonFakeProb;
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}
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// *****************************************************************************************
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// Do not fake into Muon
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// *****************************************************************************************
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//create new fake event header
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FakeEventHeader *notFakeEvent = new FakeEventHeader();
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notFakeEvent->SetWeight(FakeEventHeaders->At(i)->Weight() *
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(1-totalCumulativeFakeProbability));
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//add previous fakes
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for (UInt_t f=0;f<FakeEventHeaders->At(i)->FakeObjsSize();f++) {
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notFakeEvent->AddFakeObject(FakeEventHeaders->At(i)->FakeObj(f));
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}
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//add previous jets
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for (UInt_t jj=0;jj<FakeEventHeaders->At(i)->NJets();jj++) {
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notFakeEvent->AddJets(FakeEventHeaders->At(i)->UnfakedJet(jj));
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}
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tempFakeEventHeaders->AddOwned(notFakeEvent);
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} //loop over all current fake event headers
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//replace current fake event headers with the new temporary ones.
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delete FakeEventHeaders;
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FakeEventHeaders = tempFakeEventHeaders;
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} //loop over all muon fakeable objects
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// *****************************************************************************************
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// Fake into Electrons
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// Loop through all Electron Fakeable objects and consider the fake possibility.
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// *****************************************************************************************
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for (UInt_t n = 0; n < ElFakeableObjs->GetEntries();n++) {
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//make temporary fake event headers array
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ObjArray <FakeEventHeader> *tempFakeEventHeaders = new ObjArray <FakeEventHeader> ;
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tempFakeEventHeaders->SetOwner(kTRUE);
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//loop over all fake events generated so far - and perform an additional fake if necessary
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for (UInt_t i=0; i<FakeEventHeaders->GetEntries();i++) {
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// *****************************************************************************************
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// Determine if the fakeable object was a clean lepton
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// *****************************************************************************************
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Bool_t isCleanLepton = false;
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for (UInt_t j = 0; j < CleanLeptons->GetEntries() ; j++) {
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Double_t deltaR = MathUtils::DeltaR(ElFakeableObjs->At(n)->Phi(),
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ElFakeableObjs->At(n)->Eta(),
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CleanLeptons->At(j)->Phi(), CleanLeptons->At(j)->Eta());
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if (deltaR < 0.3) {
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isCleanLepton = true;
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break;
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}
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}
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// *****************************************************************************************
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// Determine if the fakeable object was a real electron from Monte Carlo
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// *****************************************************************************************
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Bool_t isGenElectron = false;
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for (UInt_t l=0; l<GenLeptonsAndTaus->GetEntries(); l++) {
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if (MathUtils::DeltaR(ElFakeableObjs->At(n)->Phi(),
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ElFakeableObjs->At(n)->Eta(),
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GenLeptonsAndTaus->At(l)->Phi(),
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GenLeptonsAndTaus->At(l)->Eta()) < 0.3) {
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isGenElectron = true;
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}
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}
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//this is used to determine the weight of the unfaked event.
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double totalCumulativeFakeProbability = 0.0;
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// *****************************************************************************************
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// Determine if the current electron fakeable object already corresponds to one of the
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// fake muons already in the FakeEventHeader, determined based on deltaR proximity.
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// If the current electron fakeable object corresponds to one of the fake muon, then
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// we do not allow it to fake an electron, since one denominator cannot fake two leptons.
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// *****************************************************************************************
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Bool_t alreadyFaked = false;
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for (UInt_t f = 0; f < FakeEventHeaders->At(i)->FakeObjsSize() ; f++) {
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double deltaR = MathUtils::DeltaR(FakeEventHeaders->At(i)->FakeObj(f)->Mom(),
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ElFakeableObjs->At(n)->Mom());
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if (deltaR < 0.3)
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alreadyFaked = true;
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}
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if (!alreadyFaked) {
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// *****************************************************************************************
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// Perform Electron Fake
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// *****************************************************************************************
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//match fake to one of the jets
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int fakeToJetMatch = -1; //index of the jet that matches to the fake
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double minDR = 5000;
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for (UInt_t jj=0;jj<FakeEventHeaders->At(i)->NJets();jj++) {
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Double_t deltaR = MathUtils::DeltaR(FakeEventHeaders->At(i)->UnfakedJet(jj)->Mom(),
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ElFakeableObjs->At(n)->Mom());
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if (deltaR < minDR) {
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minDR = deltaR;
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fakeToJetMatch = jj;
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}
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}
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if (!(minDR < 0.5)) {
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fakeToJetMatch = -1;
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}
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//Obtain the electron FakeRate
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Double_t electronFakeProb = 0.0;
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Double_t electronFakeProbStatErrorLow = 0.0;
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Double_t electronFakeProbStatErrorHigh = 0.0;
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Double_t electronFakeProbSysErrorLow = 0.0;
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Double_t electronFakeProbSysErrorHigh = 0.0;
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Double_t electronFakeProbErrorLow = 0.0;
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Double_t electronFakeProbErrorHigh = 0.0;
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if(fFakeRate) {
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electronFakeProb = fFakeRate->ElectronFakeRate(ElFakeableObjs->At(n)->Et(),
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ElFakeableObjs->At(n)->Eta(),
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ElFakeableObjs->At(n)->Phi());
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electronFakeProbStatErrorLow =
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fFakeRate->ElectronFakeRateStatErrorLow(ElFakeableObjs->At(n)->Et(),
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ElFakeableObjs->At(n)->Eta(),
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ElFakeableObjs->At(n)->Phi());
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electronFakeProbStatErrorHigh =
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fFakeRate->ElectronFakeRateStatErrorHigh(ElFakeableObjs->At(n)->Et(),
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ElFakeableObjs->At(n)->Eta(),
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ElFakeableObjs->At(n)->Phi());
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electronFakeProbSysErrorLow =
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fFakeRate->ElectronFakeRateSysErrorLow(ElFakeableObjs->At(n)->Et(),
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ElFakeableObjs->At(n)->Eta(),
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ElFakeableObjs->At(n)->Phi());
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electronFakeProbSysErrorHigh =
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fFakeRate->ElectronFakeRateSysErrorHigh(ElFakeableObjs->At(n)->Et(),
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ElFakeableObjs->At(n)->Eta(),
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ElFakeableObjs->At(n)->Phi());
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electronFakeProbErrorLow =
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TMath::Sqrt(electronFakeProbStatErrorLow*electronFakeProbStatErrorLow +
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electronFakeProbSysErrorLow*electronFakeProbSysErrorLow);
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electronFakeProbErrorHigh =
|
| 390 |
TMath::Sqrt(electronFakeProbStatErrorHigh*electronFakeProbStatErrorHigh +
|
| 391 |
electronFakeProbSysErrorHigh*electronFakeProbSysErrorHigh);
|
| 392 |
} else {
|
| 393 |
Fatal("Process()","Error: fFakeRate is a NULL pointer.");
|
| 394 |
}
|
| 395 |
|
| 396 |
//only fake into an electron if the fakeable object did not match to a clean lepton
|
| 397 |
if (!isCleanLepton) {
|
| 398 |
//create new fake event header
|
| 399 |
FakeEventHeader *fakeElectronEvent = new FakeEventHeader();
|
| 400 |
fakeElectronEvent->SetWeight(FakeEventHeaders->At(i)->Weight() * electronFakeProb);
|
| 401 |
Double_t weightLowError = 0;
|
| 402 |
Double_t weightHighError = 0;
|
| 403 |
if (electronFakeProb) {
|
| 404 |
weightLowError = FakeEventHeaders->At(i)->Weight()*electronFakeProb*
|
| 405 |
TMath::Sqrt((FakeEventHeaders->At(i)->WeightLowError()/
|
| 406 |
FakeEventHeaders->At(i)->Weight())*
|
| 407 |
(FakeEventHeaders->At(i)->WeightLowError()/
|
| 408 |
FakeEventHeaders->At(i)->Weight()) +
|
| 409 |
(electronFakeProbErrorLow/electronFakeProb)*
|
| 410 |
(electronFakeProbErrorLow/electronFakeProb));
|
| 411 |
weightHighError = FakeEventHeaders->At(i)->Weight()*electronFakeProb*
|
| 412 |
TMath::Sqrt((FakeEventHeaders->At(i)->WeightHighError()/
|
| 413 |
FakeEventHeaders->At(i)->Weight())*
|
| 414 |
(FakeEventHeaders->At(i)->WeightHighError()/
|
| 415 |
FakeEventHeaders->At(i)->Weight()) +
|
| 416 |
(electronFakeProbErrorHigh/electronFakeProb)*
|
| 417 |
(electronFakeProbErrorHigh/electronFakeProb));
|
| 418 |
}
|
| 419 |
fakeElectronEvent->SetWeightLowError(weightLowError);
|
| 420 |
fakeElectronEvent->SetWeightHighError(weightHighError);
|
| 421 |
|
| 422 |
//add previous fakes
|
| 423 |
for (UInt_t f=0;f<FakeEventHeaders->At(i)->FakeObjsSize();f++) {
|
| 424 |
fakeElectronEvent->AddFakeObject(FakeEventHeaders->At(i)->FakeObj(f));
|
| 425 |
}
|
| 426 |
//add the new fake
|
| 427 |
fakeElectronEvent->AddFakeObject(ElFakeableObjs->At(n),
|
| 428 |
kElectron,isCleanLepton,isGenElectron);
|
| 429 |
//add previous jets that do not match to the new fake
|
| 430 |
for (UInt_t jj=0;jj<FakeEventHeaders->At(i)->NJets();jj++) {
|
| 431 |
if ((int)jj != fakeToJetMatch)
|
| 432 |
fakeElectronEvent->AddJets(FakeEventHeaders->At(i)->UnfakedJet(jj));
|
| 433 |
}
|
| 434 |
|
| 435 |
//add fake event to the temporary fake event header array
|
| 436 |
tempFakeEventHeaders->AddOwned(fakeElectronEvent);
|
| 437 |
//increase cumulative fake probability
|
| 438 |
totalCumulativeFakeProbability += electronFakeProb;
|
| 439 |
}
|
| 440 |
}
|
| 441 |
|
| 442 |
// *****************************************************************************************
|
| 443 |
// Do not fake into anything
|
| 444 |
// *****************************************************************************************
|
| 445 |
//create new fake event header
|
| 446 |
FakeEventHeader *notFakeEvent = new FakeEventHeader();
|
| 447 |
notFakeEvent->SetWeight(FakeEventHeaders->At(i)->Weight() *
|
| 448 |
(1-totalCumulativeFakeProbability));
|
| 449 |
//add previous fakes
|
| 450 |
for (UInt_t f=0;f<FakeEventHeaders->At(i)->FakeObjsSize();f++) {
|
| 451 |
notFakeEvent->AddFakeObject(FakeEventHeaders->At(i)->FakeObj(f));
|
| 452 |
}
|
| 453 |
//add previous jets
|
| 454 |
for (UInt_t jj=0;jj<FakeEventHeaders->At(i)->NJets();jj++) {
|
| 455 |
notFakeEvent->AddJets(FakeEventHeaders->At(i)->UnfakedJet(jj));
|
| 456 |
}
|
| 457 |
tempFakeEventHeaders->AddOwned(notFakeEvent);
|
| 458 |
|
| 459 |
} //for all current fake event headers
|
| 460 |
|
| 461 |
//replace current fake event headers with the new temporary ones.
|
| 462 |
delete FakeEventHeaders;
|
| 463 |
FakeEventHeaders = tempFakeEventHeaders;
|
| 464 |
} //loop over all fakeable objects
|
| 465 |
|
| 466 |
// export FakeEventHeaders for other modules to use
|
| 467 |
FakeEventHeaders->SetName(fFakeEventHeadersName);
|
| 468 |
AddObjThisEvt(FakeEventHeaders);
|
| 469 |
|
| 470 |
//delete temporary collections
|
| 471 |
delete GenLeptonsAndTaus;
|
| 472 |
}
|
