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#include<iostream>
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#include<math.h>
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#include<string>
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#include "TSystem.h"
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#include "treeWriter.h"
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using namespace std;
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TreeWriter::TreeWriter(TString inputName, TString outputName, int loggingVerbosity_ ) {
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// read the input file
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inputTree = new TChain("susyTree");
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if (loggingVerbosity_ > 0)
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std::cout << "Add files to chain" << std::endl;
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inputTree->Add( inputName );
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if (loggingVerbosity_ > 0)
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std::cout << "Set Branch Address of susy::Event" << std::endl;
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event = new susy::Event;
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inputTree->SetBranchAddress("susyEvent", &event);
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if (outputName == "") {
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// Here the output filename is generated automaticly
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try{
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string fName = (string) inputName;
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// Search for 'susyEvents_', and get the unique characters afterwards.
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// eg /path/susyEvents_123_Myl.root -> susyTree_123_Mly.root
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outputName = "susyTree_" + fName.substr(fName.find("susyEvents_")+11,-1);
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} catch (int e ) {
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outputName = "susyTree.root";
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}
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}
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if (loggingVerbosity_>0)
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std::cout << "Open file " << outputName << " for writing." << std::endl;
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// open the output file
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outFile = new TFile( outputName, "recreate" );
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tree = new TTree("susyTree","Tree for single photon analysis");
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// set default parameter
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processNEvents = -1;
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reportEvery = 1000;
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loggingVerbosity = loggingVerbosity_;
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skim = true;
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}
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TreeWriter::~TreeWriter() {
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if (!inputTree) return;
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delete inputTree->GetCurrentFile();
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}
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// useful functions
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float TreeWriter::deltaR( TLorentzVector v1, TLorentzVector v2 ) {
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return sqrt(pow(v1.Eta() - v2.Eta(), 2) + pow(v1.Phi() - v2.Phi(), 2) );
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}
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// correct iso, see https://twiki.cern.ch/twiki/bin/view/CMS/CutBasedPhotonID2012
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float chargedHadronIso_corrected(susy::Photon gamma, float rho) {
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float eta = fabs(gamma.caloPosition.Eta());
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float ea;
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if(eta < 1.0) ea = 0.012;
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else if(eta < 1.479) ea = 0.010;
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else if(eta < 2.0) ea = 0.014;
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else if(eta < 2.2) ea = 0.012;
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else if(eta < 2.3) ea = 0.016;
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else if(eta < 2.4) ea = 0.020;
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else ea = 0.012;
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float iso = gamma.chargedHadronIso;
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iso = max(iso - rho*ea, (float)0.);
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return iso;
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}
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float neutralHadronIso_corrected(susy::Photon gamma, float rho) {
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float eta = fabs(gamma.caloPosition.Eta());
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float ea;
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if(eta < 1.0) ea = 0.030;
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else if(eta < 1.479) ea = 0.057;
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else if(eta < 2.0) ea = 0.039;
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else if(eta < 2.2) ea = 0.015;
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else if(eta < 2.3) ea = 0.024;
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else if(eta < 2.4) ea = 0.039;
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else ea = 0.072;
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float iso = gamma.neutralHadronIso;
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iso = max(iso - rho*ea, (float)0.);
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return iso;
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}
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float photonIso_corrected(susy::Photon gamma, float rho) {
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float eta = fabs(gamma.caloPosition.Eta());
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float ea;
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if(eta < 1.0) ea = 0.148;
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else if(eta < 1.479) ea = 0.130;
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else if(eta < 2.0) ea = 0.112;
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else if(eta < 2.2) ea = 0.216;
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else if(eta < 2.3) ea = 0.262;
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else if(eta < 2.4) ea = 0.260;
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else ea = 0.266;
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float iso = gamma.photonIso;
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iso = max(iso - rho*ea, (float)0.);
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return iso;
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}
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float TreeWriter::getPtFromMatchedJet( susy::Photon myPhoton, susy::Event myEvent ) {
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/**
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* \brief Takes jet p_T as photon p_T
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*
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* At first all jets with DeltaR < 0.3 (isolation cone) are searched.
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* If several jets are found, take the one with the minimal pt difference
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* compared to the photon. If no such jets are found, keep the photon_pt
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* TODO: remove photon matched jet from jet-selection?
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*/
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std::vector<susy::PFJet> nearJets;
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nearJets.clear();
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std::map<TString,susy::PFJetCollection>::iterator pfJets_it = myEvent.pfJets.find("ak5");
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if(pfJets_it == myEvent.pfJets.end()){
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if(myEvent.pfJets.size() > 0) std::cout << "JetCollection is not available!!!" << std::endl;
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} else {
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susy::PFJetCollection& jetColl = pfJets_it->second;
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for(std::vector<susy::PFJet>::iterator it = jetColl.begin();
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it != jetColl.end(); it++) {
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std::map<TString,Float_t>::iterator s_it = it->jecScaleFactors.find("L2L3");
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if (s_it == it->jecScaleFactors.end()) {
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std::cout << "JEC is not available for this jet!!!" << std::endl;
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continue;
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}
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float scale = s_it->second;
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TLorentzVector corrP4 = scale * it->momentum;
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float deltaR_ = deltaR(myPhoton.momentum, corrP4 );
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if (deltaR_ > 0.3) continue;
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if( loggingVerbosity > 0 )
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std::cout << "gamma pt jet matching factor = " << it->momentum.Et() / myPhoton.momentum.Et() << std::endl;
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nearJets.push_back( *it );
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}// for jet
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}// if, else
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if ( nearJets.size() == 0 ) {
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//std::cout << "No jet with deltaR < .3 found, do not change photon_pt" << std::endl;
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return myPhoton.momentum.Et();
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}
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float pt = 0;
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float minPtDifferenz = 1E20; // should be very high
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for( std::vector<susy::PFJet>::iterator it = nearJets.begin(), jetEnd = nearJets.end();
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it != jetEnd; it++ ) {
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float ptDiff = fabs(myPhoton.momentum.Et() - it->momentum.Et());
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if ( ptDiff < minPtDifferenz ) {
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minPtDifferenz = ptDiff;
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pt = it->momentum.Et();
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}
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}
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// testing
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if( nearJets.size() > 1 && loggingVerbosity > 0 )
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std::cout << "There are several jets matching to this photon. "
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<< "Please check if jet-matching is correct." << std::endl;
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return pt;
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}
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void TreeWriter::Loop() {
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// here the event loop is implemented and the tree is filled
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if (inputTree == 0) return;
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// get number of events to be proceeded
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Long64_t nentries = inputTree->GetEntries();
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if(processNEvents <= 0 || processNEvents > nentries) processNEvents = nentries;
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if( loggingVerbosity > 0 )
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std::cout << "Processing " << processNEvents << " ouf of "
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<< nentries << " events. " << std::endl;
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tree::Photon *thisphoton = new tree::Photon();
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tree::Jet *thisjet = new tree::Jet();
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tree->Branch("photon", &photon);
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tree->Branch("jet", &jet);
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tree->Branch("met", &met, "met/F");
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tree->Branch("ht", &ht, "ht/F");
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tree->Branch("nVertex", &nVertex, "nVertex/I");
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tree->Branch("nElectron", &nElectron, "nElectron/I");
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for (long jentry=0; jentry < processNEvents; jentry++) {
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if ( loggingVerbosity>0 && jentry%reportEvery==0 )
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std::cout << jentry << " / " << processNEvents << std :: endl;
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inputTree->GetEntry(jentry);
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photon.clear();
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jet.clear();
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ht = 0;
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// photons
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if( loggingVerbosity > 1 )
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std::cout << "Process photons" << std::endl;
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std::map<TString, std::vector<susy::Photon> >::iterator phoMap = event->photons.find("photons");
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for(std::vector<susy::Photon>::iterator it = phoMap->second.begin();
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it != phoMap->second.end() && phoMap != event->photons.end(); it++ ) {
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if( ! it->isEB() && skim )
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continue;
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thisphoton->pt = getPtFromMatchedJet( *it, *event );
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if( thisphoton->pt < 80 && skim )
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continue;
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thisphoton->eta = it->momentum.Eta();
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thisphoton->phi = it->momentum.Phi();
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thisphoton->chargedIso = chargedHadronIso_corrected(*it, event->rho25);
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thisphoton->neutralIso = neutralHadronIso_corrected(*it, event->rho25);
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thisphoton->photonIso = photonIso_corrected(*it, event->rho25);
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if ( it->r9 >= 1 && skim )
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continue;
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thisphoton->r9 = it->r9;
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thisphoton->sigmaIetaIeta = it->sigmaIetaIeta;
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thisphoton->hadTowOverEm = it->hadTowOverEm;
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thisphoton->pixelseed = it->nPixelSeeds;
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photon.push_back( *thisphoton );
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ht += thisphoton->pt;
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if( loggingVerbosity > 2 )
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std::cout << " p_T, gamma = " << thisphoton->pt << std::endl;
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}
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if( photon.size() == 0 && skim )
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continue;
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std::sort( photon.begin(), photon.end(), tree::EtGreater);
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if( loggingVerbosity > 1 )
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std::cout << "Found " << photon.size() << " photons" << std::endl;
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// jets
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std::map<TString,susy::PFJetCollection>::iterator pfJets_it = event->pfJets.find("ak5");
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if(pfJets_it == event->pfJets.end()){
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if(event->pfJets.size() > 0) std::cout << "JetCollection is not available!!!" << std::endl;
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} else {
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susy::PFJetCollection& jetColl = pfJets_it->second;
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for(std::vector<susy::PFJet>::iterator it = jetColl.begin();
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it != jetColl.end(); it++) {
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std::map<TString,Float_t>::iterator s_it = it->jecScaleFactors.find("L2L3");
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if (s_it == it->jecScaleFactors.end()) {
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std::cout << "JEC is not available for this jet!!!" << std::endl;
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continue;
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}
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float scale = s_it->second;
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TLorentzVector corrP4 = scale * it->momentum;
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if(std::abs(corrP4.Eta()) > 3.0 && skim ) continue;
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if(corrP4.Et() < 30 && skim ) continue;
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thisjet->pt = corrP4.Et();
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thisjet->eta = corrP4.Eta();
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thisjet->phi = corrP4.Phi();
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jet.push_back( *thisjet );
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ht += thisjet->pt;
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}// for jet
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}// if, else
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if( jet.size() < 2 && skim )
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continue;
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std::sort( jet.begin(), jet.end(), tree::EtGreater);
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// met
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std::map<TString, susy::MET>::iterator met_it = event->metMap.find("pfMet");
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susy::MET* metobj = &(met_it->second);
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met = metobj->met();
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// electrons
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//std::vector<susy::Electron> eVector = event->electrons["gsfElectrons"];
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//nElectron = eVector.size();
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// vertices
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nVertex = event->vertices.size();
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if( ht < 450 && skim)
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continue;
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tree->Fill();
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} // for jentry
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tree->Write();
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outFile->cd();
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outFile->Write();
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outFile->Close();
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}
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