#include <TTbarSpinCorrHepMCAnalyzer.h>

Inheritance diagram for TTbarSpinCorrHepMCAnalyzer:

Public Member Functions
	TTbarSpinCorrHepMCAnalyzer (const edm::ParameterSet &)

	~TTbarSpinCorrHepMCAnalyzer ()

Public Member Functions inherited from edm::EDAnalyzer
	EDAnalyzer ()

std::string	workerType () const

virtual	~EDAnalyzer ()

Private Member Functions
virtual void	analyze (const edm::Event &, const edm::EventSetup &)

virtual void	beginJob ()

virtual void	beginLuminosityBlock (edm::LuminosityBlock const &, edm::EventSetup const &)

virtual void	beginRun (edm::Run const &, edm::EventSetup const &)

virtual void	endJob ()

virtual void	endLuminosityBlock (edm::LuminosityBlock const &, edm::EventSetup const &)

virtual void	endRun (edm::Run const &, edm::EventSetup const &)

Private Attributes
MonitorElement *	_h_asym

MonitorElement *	_h_deltaPhi

MonitorElement *	_h_llpairM

MonitorElement *	_h_llpairPt

DQMStore *	dbe

edm::InputTag	genEventInfoProductTag_

edm::InputTag	genParticlesTag_

MonitorElement *	nEvt

double	weight

Additional Inherited Members
Public Types inherited from edm::EDAnalyzer
typedef EDAnalyzer	ModuleType

typedef WorkerT< EDAnalyzer >	WorkerType

Static Public Member Functions inherited from edm::EDAnalyzer
static const std::string &	baseType ()

static void	fillDescriptions (ConfigurationDescriptions &descriptions)

static void	prevalidate (ConfigurationDescriptions &)

Protected Member Functions inherited from edm::EDAnalyzer
CurrentProcessingContext const *	currentContext () const

Detailed Description

Description: [one line class summary]

Implementation: [Notes on implementation]

Definition at line 56 of file TTbarSpinCorrHepMCAnalyzer.h.

Constructor & Destructor Documentation

TTbarSpinCorrHepMCAnalyzer::TTbarSpinCorrHepMCAnalyzer ( const edm::ParameterSet & iConfig )

explicit

Definition at line 6 of file TTbarSpinCorrHepMCAnalyzer.cc.

References dbe, and cppFunctionSkipper::operator.

                                                                                      :
   genEventInfoProductTag_(iConfig.getParameter<edm::InputTag>("genEventInfoProductTag")),
   genParticlesTag_(iConfig.getParameter<edm::InputTag>("genParticlesTag"))
 {
   dbe = 0;
   dbe = edm::Service<DQMStore>().operator->();
 }

TTbarSpinCorrHepMCAnalyzer::~TTbarSpinCorrHepMCAnalyzer ( )

Definition at line 15 of file TTbarSpinCorrHepMCAnalyzer.cc.

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

Member Function Documentation

void TTbarSpinCorrHepMCAnalyzer::analyze	(	const edm::Event &	iEvent,
		const edm::EventSetup &	iSetup
	)

privatevirtual

Implements edm::EDAnalyzer.

Definition at line 30 of file TTbarSpinCorrHepMCAnalyzer.cc.

References _h_asym, _h_deltaPhi, _h_llpairM, _h_llpairPt, SiPixelRawToDigiRegional_cfi::deltaPhi, MonitorElement::Fill(), genEventInfoProductTag_, genParticleCandidates2GenParticles_cfi::genParticles, genParticlesTag_, edm::Event::getByLabel(), i, nEvt, AlCaHLTBitMon_ParallelJobs::p, reco::LeafCandidate::p4(), reco::LeafCandidate::pdgId(), Phi_mpi_pi(), reco::LeafCandidate::status(), and weight.

 {
   using namespace edm;
 
   // --- the MC weights ---
   Handle<GenEventInfoProduct> evt_info;
   iEvent.getByLabel(genEventInfoProductTag_, evt_info);
   if (evt_info.failedToGet())
     return;
 
   weight = evt_info->weight() ;
   
   // --- get genParticles ---
   Handle<reco::GenParticleCollection> genParticles;
   iEvent.getByLabel(genParticlesTag_, genParticles);   
 
   const reco::GenParticle * _lepton   (0) ;
   const reco::GenParticle * _leptonBar(0) ;
 
   bool hasTop(false), hasTopbar(false);
   for(size_t i = 0; i < genParticles->size(); ++ i) {
     const reco::GenParticle & p = (*genParticles)[i];
     if(p.pdgId() == 6) hasTop=true;
     if(p.pdgId() == -6) hasTopbar=true;
   }
 
   if(hasTop && hasTopbar){
     // --- get status 3 leptons
     for(size_t i = 0; i < genParticles->size(); ++ i) {
       const reco::GenParticle & p = (*genParticles)[i];
       if ( (p.pdgId() ==  11 ||
         p.pdgId() ==  13 ||
         p.pdgId() ==  15) && p.status() == 3) { _lepton    = &p ; }
       if ( (p.pdgId() == -11 ||
         p.pdgId() == -13 ||
         p.pdgId() == -15) && p.status() == 3) { _leptonBar = &p ; }
       
       if (_lepton && _leptonBar) break;
     }
     
     if (_lepton && _leptonBar) {
       
       math::XYZTLorentzVector lepton    = _lepton   ->p4() ;
       math::XYZTLorentzVector leptonBar = _leptonBar->p4() ;
       
       double deltaPhi = fabs(TVector2::Phi_mpi_pi(lepton.phi() - leptonBar.phi())) ;
       _h_deltaPhi->Fill(deltaPhi, weight) ;
       
       double asym = ( deltaPhi > CLHEP::halfpi ) ? 0.5 : -0.5 ;
       _h_asym->Fill(asym, weight) ;
       
       math::XYZTLorentzVector llpair    = lepton + leptonBar ;
       
       double llpairPt = llpair.pt() ;
       _h_llpairPt->Fill(llpairPt, weight) ;
       
       double llpairM  = llpair.M() ;
     _h_llpairM ->Fill(llpairM , weight) ;
     
     }
     nEvt->Fill(0.5 , weight) ;
   }
 }

void TTbarSpinCorrHepMCAnalyzer::beginJob ( void )

privatevirtual

Setting the DQM top directories

Reimplemented from edm::EDAnalyzer.

Definition at line 97 of file TTbarSpinCorrHepMCAnalyzer.cc.

References _h_asym, _h_deltaPhi, _h_llpairM, _h_llpairPt, DQMStore::book1D(), dbe, dir, nEvt, MonitorElement::setAxisTitle(), and DQMStore::setCurrentFolder().

 {
   if(dbe){
     TString dir="Generator/";
     dir+="TTbarSpinCorr";
     dbe->setCurrentFolder(dir.Data());
 
     // Number of analyzed events
     nEvt = dbe->book1D("nEvt", "n analyzed Events", 1, 0., 1.);
     
     _h_asym = dbe->book1D("TTbar_asym","Asymmetr", 2, -1., 1.);
     _h_asym->setAxisTitle("Asymmetry");
 
     _h_deltaPhi = dbe->book1D("TTbar_deltaPhi","#Delta#phi(ll)", 320, 0, 3.2);
     _h_deltaPhi->setAxisTitle("#Delta#phi(ll)");
     
     _h_llpairPt = dbe->book1D("TTbar_llpairPt","Lepton pair transverse momentum", 1000, 0, 1000);
     _h_llpairPt->setAxisTitle("p_{T}(ll)");
     
     _h_llpairM  = dbe->book1D("TTbar_llpairM","Lepton pair invariant mass", 1000, 0, 1000);
     _h_llpairM->setAxisTitle("M(ll)");
 
   }
 }