Inheritance diagram for PatBJetVertexAnalyzer:

Classes
struct	Plots

Public Member Functions
virtual void	analyze (const edm::Event &event, const edm::EventSetup &es) override

virtual void	beginJob () override

	PatBJetVertexAnalyzer (const edm::ParameterSet &params)
	constructor and destructor More...

	~PatBJetVertexAnalyzer ()

Public Member Functions inherited from edm::EDAnalyzer
void	callWhenNewProductsRegistered (std::function< void(BranchDescription const &)> const &func)

	EDAnalyzer ()

ModuleDescription const &	moduleDescription () const

std::string	workerType () const

virtual	~EDAnalyzer ()

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

ProductHolderIndexAndSkipBit	indexFrom (EDGetToken, BranchType, TypeID const &) const

void	itemsMayGet (BranchType, std::vector< ProductHolderIndexAndSkipBit > &) const

void	itemsToGet (BranchType, std::vector< ProductHolderIndexAndSkipBit > &) const

std::vector < ProductHolderIndexAndSkipBit > const &	itemsToGetFromEvent () const

void	labelsForToken (EDGetToken iToken, Labels &oLabels) const

void	modulesDependentUpon (const std::string &iProcessName, std::vector< const char * > &oModuleLabels) const

bool	registeredToConsume (ProductHolderIndex, bool, BranchType) const

bool	registeredToConsumeMany (TypeID const &, BranchType) const

void	updateLookup (BranchType iBranchType, ProductHolderIndexHelper const &)

virtual	~EDConsumerBase ()

Private Types
enum	Flavour { ALL_JETS = 0, UDSG_JETS, C_JETS, B_JETS, NONID_JETS, N_JET_TYPES }

Private Attributes
TH1 *	flavours_

double	jetEtaCut_

double	jetPtCut_

edm::EDGetTokenT < pat::JetCollection >	jetsToken_

double	maxDeltaR_

struct PatBJetVertexAnalyzer::Plots	plots_ [N_JET_TYPES]

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

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::EDConsumerBase
template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	consumes (edm::InputTag const &tag)

EDGetToken	consumes (const TypeToGet &id, edm::InputTag const &tag)

template<BranchType B>
EDGetToken	consumes (TypeToGet const &id, edm::InputTag const &tag)

ConsumesCollector	consumesCollector ()
	Use a ConsumesCollector to gather consumes information from helper functions. More...

template<typename ProductType , BranchType B = InEvent>
void	consumesMany ()

void	consumesMany (const TypeToGet &id)

template<BranchType B>
void	consumesMany (const TypeToGet &id)

template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	mayConsume (edm::InputTag const &tag)

EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)

template<BranchType B>
EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)

Detailed Description

Definition at line 33 of file PatBJetVertexAnalyzer.cc.

Member Enumeration Documentation

enum PatBJetVertexAnalyzer::Flavour

private

Enumerator
ALL_JETS
UDSG_JETS
C_JETS
B_JETS
NONID_JETS
N_JET_TYPES

Definition at line 53 of file PatBJetVertexAnalyzer.cc.

                  {
         ALL_JETS = 0,
         UDSG_JETS,
         C_JETS,
         B_JETS,
         NONID_JETS,
         N_JET_TYPES
     };

Constructor & Destructor Documentation

PatBJetVertexAnalyzer::PatBJetVertexAnalyzer ( const edm::ParameterSet & params )

constructor and destructor

Definition at line 72 of file PatBJetVertexAnalyzer.cc.

                                                                           :
     jetsToken_(consumes<pat::JetCollection>(params.getParameter<edm::InputTag>("jets"))),
     jetPtCut_(params.getParameter<double>("jetPtCut")),
     jetEtaCut_(params.getParameter<double>("jetEtaCut"))
 {
 }

PatBJetVertexAnalyzer::~PatBJetVertexAnalyzer ( )

Definition at line 79 of file PatBJetVertexAnalyzer.cc.

80 {

81 }

Member Function Documentation

void PatBJetVertexAnalyzer::analyze	(	const edm::Event &	event,
		const edm::EventSetup &	es
	)

overridevirtual

Implements edm::EDAnalyzer.

Definition at line 148 of file PatBJetVertexAnalyzer.cc.

 {
     // handle to the jets collection
     edm::Handle<pat::JetCollection> jetsHandle;
     event.getByToken(jetsToken_, jetsHandle);
 
     // now go through all jets
     for(pat::JetCollection::const_iterator jet = jetsHandle->begin();
         jet != jetsHandle->end(); ++jet) {
 
         // only look at jets that pass the pt and eta cut
         if (jet->pt() < jetPtCut_ ||
             std::abs(jet->eta()) > jetEtaCut_)
             continue;
 
         Flavour flavour;
         // find out the jet flavour (differs between quark and anti-quark)
         switch(std::abs(jet->partonFlavour())) {
             case 1:
             case 2:
             case 3:
             case 21:
             flavour = UDSG_JETS;
             break;
             case 4:
             flavour = C_JETS;
             break;
             case 5:
             flavour = B_JETS;
             break;
             default:
             flavour = NONID_JETS;
         }
 
         // simply count the number of accepted jets
         flavours_->Fill(ALL_JETS);
         flavours_->Fill(flavour);
 
         // retrieve the "secondary vertex tag infos"
         // this is the output of the b-tagging reconstruction code
         // and contains secondary vertices in the jets
         const reco::SecondaryVertexTagInfo &svTagInfo =
                     *jet->tagInfoSecondaryVertex();
 
         // count the number of secondary vertices
         plots_[ALL_JETS].nVertices->Fill(svTagInfo.nVertices());
         plots_[flavour].nVertices->Fill(svTagInfo.nVertices());
 
         // ignore jets without SV from now on
         if (svTagInfo.nVertices() < 1)
             continue;
 
         // pick the first secondary vertex (the "best" one)
         const reco::Vertex &sv = svTagInfo.secondaryVertex(0);
 
         // and plot number of tracks and chi^2
         plots_[ALL_JETS].nTracks->Fill(sv.tracksSize());
         plots_[flavour].nTracks->Fill(sv.tracksSize());
 
         plots_[ALL_JETS].chi2->Fill(sv.chi2());
         plots_[flavour].chi2->Fill(sv.chi2());
 
         // the precomputed transverse distance to the primary vertex
         Measurement1D distance = svTagInfo.flightDistance(0, true);
 
         plots_[ALL_JETS].dist->Fill(distance.value());
         plots_[flavour].dist->Fill(distance.value());
 
         plots_[ALL_JETS].distErr->Fill(distance.error());
         plots_[flavour].distErr->Fill(distance.error());
 
         plots_[ALL_JETS].distSig->Fill(distance.significance());
         plots_[flavour].distSig->Fill(distance.significance());
 
 
         // the precomputed direction with respect to the primary vertex
         GlobalVector dir = svTagInfo.flightDirection(0);
 
         // unfortunately CMSSW hsa all kinds of vectors,
         // and sometimes we need to convert them *sigh*
         math::XYZVector dir2(dir.x(), dir.y(), dir.z());
 
         // compute a few variables that we are plotting
         double deltaR = ROOT::Math::VectorUtil::DeltaR(
                         jet->momentum(), dir2);
 
         plots_[ALL_JETS].deltaR->Fill(deltaR);
         plots_[flavour].deltaR->Fill(deltaR);
 
         // compute the invariant mass from a four-vector sum
         math::XYZTLorentzVector trackFourVectorSum;
 
         // loop over all tracks in the vertex
         for(reco::Vertex::trackRef_iterator track = sv.tracks_begin();
             track != sv.tracks_end(); ++track) {
             ROOT::Math::LorentzVector<ROOT::Math::PxPyPzM4D<double> > vec;
             vec.SetPx((*track)->px());
             vec.SetPy((*track)->py());
             vec.SetPz((*track)->pz());
             vec.SetM(0.13957);  // pion mass
             trackFourVectorSum += vec;
         }
 
         // get the invariant mass: sqrt(E² - px² - py² - pz²)
         double vertexMass = trackFourVectorSum.M();
 
         plots_[ALL_JETS].mass->Fill(vertexMass);
         plots_[flavour].mass->Fill(vertexMass);
     }
 }

void PatBJetVertexAnalyzer::beginJob ( void )

overridevirtual

Reimplemented from edm::EDAnalyzer.

Definition at line 83 of file PatBJetVertexAnalyzer.cc.

References ALL_JETS, B_JETS, C_JETS, PatBJetVertexAnalyzer::Plots::chi2, PatBJetVertexAnalyzer::Plots::deltaR, PatBJetVertexAnalyzer::Plots::dist, PatBJetVertexAnalyzer::Plots::distErr, PatBJetVertexAnalyzer::Plots::distSig, reco::flavour(), flavours_, i, TFileService::make(), PatBJetVertexAnalyzer::Plots::mass, N_JET_TYPES, mergeVDriftHistosByStation::name, PatBJetVertexAnalyzer::Plots::nTracks, PatBJetVertexAnalyzer::Plots::nVertices, RecoTauValidation_cfi::plots, plots_, and UDSG_JETS.

 {
     // retrieve handle to auxiliary service
     //  used for storing histograms into ROOT file
     edm::Service<TFileService> fs;
 
     flavours_ = fs->make<TH1F>("flavours", "jet flavours", 5, 0, 5);
 
     // book histograms for all jet flavours
     for(unsigned int i = 0; i < N_JET_TYPES; i++) {
         Plots &plots = plots_[i];
         const char *flavour, *name;
 
         switch((Flavour)i) {
             case ALL_JETS:
             flavour = "all jets";
             name = "all";
             break;
             case UDSG_JETS:
             flavour = "light flavour jets";
             name = "udsg";
             break;
             case C_JETS:
             flavour = "charm jets";
             name = "c";
             break;
             case B_JETS:
             flavour = "bottom jets";
             name = "b";
             break;
             default:
             flavour = "unidentified jets";
             name = "ni";
             break;
         }
 
         plots.nVertices = fs->make<TH1F>(Form("nVertices_%s", name),
                                          Form("number of secondary vertices in %s", flavour),
                                          5, 0, 5);
         plots.deltaR = fs->make<TH1F>(Form("deltaR_%s", name),
                                       Form("\\DeltaR between vertex direction and jet direction in %s", flavour),
                                       100, 0, 0.5);
         plots.mass = fs->make<TH1F>(Form("mass_%s", name),
                                     Form("vertex mass in %s", flavour),
                                     100, 0, 10);
         plots.dist = fs->make<TH1F>(Form("dist_%s", name),
                                     Form("Transverse distance between PV and SV in %s", flavour),
                                     100, 0, 2);
         plots.distErr = fs->make<TH1F>(Form("distErr_%s", name),
                                        Form("Transverse distance error between PV and SV in %s", flavour),
                                        100, 0, 0.5);
         plots.distSig = fs->make<TH1F>(Form("distSig_%s", name),
                                        Form("Transverse distance significance between PV and SV in %s", flavour),
                                        100, 0, 50);
         plots.nTracks = fs->make<TH1F>(Form("nTracks_%s", name),
                                        Form("number of tracks at secondary vertex in %s", flavour),
                                        20, 0, 20);
         plots.chi2 = fs->make<TH1F>(Form("chi2_%s", name),
                                     Form("secondary vertex fit \\chi^{2} in %s", flavour),
                                     100, 0, 50);
     }
 }

Member Data Documentation

TH1* PatBJetVertexAnalyzer::flavours_

private

Definition at line 62 of file PatBJetVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

double PatBJetVertexAnalyzer::jetEtaCut_

private

Definition at line 48 of file PatBJetVertexAnalyzer.cc.

Referenced by analyze().

double PatBJetVertexAnalyzer::jetPtCut_

private

Definition at line 47 of file PatBJetVertexAnalyzer.cc.

Referenced by analyze().

edm::EDGetTokenT<pat::JetCollection> PatBJetVertexAnalyzer::jetsToken_

private

Definition at line 45 of file PatBJetVertexAnalyzer.cc.

Referenced by analyze().

double PatBJetVertexAnalyzer::maxDeltaR_

private

Definition at line 49 of file PatBJetVertexAnalyzer.cc.

struct PatBJetVertexAnalyzer::Plots PatBJetVertexAnalyzer::plots_[N_JET_TYPES]

private

Referenced by analyze(), and beginJob().

Classes

Public Member Functions

Private Types

Private Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation