PatBJetVertexAnalyzer Class Reference

Inheritance diagram for PatBJetVertexAnalyzer:

Classes
struct	Plots

Public Member Functions
void	analyze (const edm::Event &event, const edm::EventSetup &es) override
void	beginJob () override
	PatBJetVertexAnalyzer (const edm::ParameterSet &params)
	constructor and destructor More...
	~PatBJetVertexAnalyzer () override
Public Member Functions inherited from edm::EDAnalyzer
void	callWhenNewProductsRegistered (std::function< void(BranchDescription const &)> const &func)
	EDAnalyzer ()
SerialTaskQueue *	globalLuminosityBlocksQueue ()
SerialTaskQueue *	globalRunsQueue ()
ModuleDescription const &	moduleDescription () const
std::string	workerType () const
	~EDAnalyzer () override
Public Member Functions inherited from edm::EDConsumerBase
std::vector< ConsumesInfo >	consumesInfo () const
void	convertCurrentProcessAlias (std::string const &processName)
	Convert "@currentProcess" in InputTag process names to the actual current process name. More...
	EDConsumerBase ()
	EDConsumerBase (EDConsumerBase &&)=default
	EDConsumerBase (EDConsumerBase const &)=delete
ESProxyIndex const *	esGetTokenIndices (edm::Transition iTrans) const
ProductResolverIndexAndSkipBit	indexFrom (EDGetToken, BranchType, TypeID const &) const
void	itemsMayGet (BranchType, std::vector< ProductResolverIndexAndSkipBit > &) const
void	itemsToGet (BranchType, std::vector< ProductResolverIndexAndSkipBit > &) const
std::vector< ProductResolverIndexAndSkipBit > const &	itemsToGetFrom (BranchType iType) const
void	labelsForToken (EDGetToken iToken, Labels &oLabels) const
void	modulesWhoseProductsAreConsumed (std::vector< ModuleDescription const * > &modules, ProductRegistry const &preg, std::map< std::string, ModuleDescription const * > const &labelsToDesc, std::string const &processName) const
EDConsumerBase &	operator= (EDConsumerBase &&)=default
EDConsumerBase const &	operator= (EDConsumerBase const &)=delete
bool	registeredToConsume (ProductResolverIndex, bool, BranchType) const
bool	registeredToConsumeMany (TypeID const &, BranchType) const
ProductResolverIndexAndSkipBit	uncheckedIndexFrom (EDGetToken) const
void	updateLookup (BranchType iBranchType, ProductResolverIndexHelper const &, bool iPrefetchMayGet)
void	updateLookup (eventsetup::ESRecordsToProxyIndices const &)
virtual	~EDConsumerBase () noexcept(false)

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
Public Types inherited from edm::EDConsumerBase
typedef ProductLabels	Labels
Static Public Member Functions inherited from edm::EDAnalyzer
static const std::string &	baseType ()
static void	fillDescriptions (ConfigurationDescriptions &descriptions)
static void	prevalidate (ConfigurationDescriptions &)
static bool	wantsGlobalLuminosityBlocks ()
static bool	wantsGlobalRuns ()
static bool	wantsStreamLuminosityBlocks ()
static bool	wantsStreamRuns ()
Protected Member Functions inherited from edm::EDConsumerBase
EDGetToken	consumes (const TypeToGet &id, edm::InputTag const &tag)
template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	consumes (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 ESProduct , typename ESRecord , Transition Tr = Transition::Event>
auto	esConsumes ()
template<typename ESProduct , typename ESRecord , Transition Tr = Transition::Event>
auto	esConsumes (ESInputTag const &tag)
EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)
template<BranchType B>
EDGetToken	mayConsume (const TypeToGet &id, edm::InputTag const &tag)
template<typename ProductType , BranchType B = InEvent>
EDGetTokenT< ProductType >	mayConsume (edm::InputTag const &tag)

Detailed Description

Definition at line 33 of file PatBJetVertexAnalyzer.cc.

Member Enumeration Documentation

Flavour

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::PatBJetVertexAnalyzer

(

const edm::ParameterSet &

params

)

constructor and destructor

Definition at line 65 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::~PatBJetVertexAnalyzer ( )

override

Definition at line 70 of file PatBJetVertexAnalyzer.cc.

{}

Member Function Documentation

analyze()

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

overridevirtual

Implements edm::EDAnalyzer.

Definition at line 130 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
    const 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);
  }
}

References funct::abs(), ALL_JETS, B_JETS, C_JETS, PatBJetVertexAnalyzer::Plots::chi2, electronAnalyzer_cfi::DeltaR, PatBJetVertexAnalyzer::Plots::deltaR, PbPb_ZMuSkimMuonDPG_cff::deltaR, DeadROC_duringRun::dir, L1TDiffHarvesting_cfi::dir2, PatBJetVertexAnalyzer::Plots::dist, HLT_2018_cff::distance, PatBJetVertexAnalyzer::Plots::distErr, PatBJetVertexAnalyzer::Plots::distSig, GenHFHadronMatcher_cff::flavour, flavours_, reco::TemplatedSecondaryVertexTagInfo< IPTI, VTX >::flightDirection(), reco::TemplatedSecondaryVertexTagInfo< IPTI, VTX >::flightDistance(), metsig::jet, jetEtaCut_, jetPtCut_, jetsToken_, PatBJetVertexAnalyzer::Plots::mass, NONID_JETS, PatBJetVertexAnalyzer::Plots::nTracks, PatBJetVertexAnalyzer::Plots::nVertices, reco::TemplatedSecondaryVertexTagInfo< IPTI, VTX >::nVertices(), plots_, reco::TemplatedSecondaryVertexTagInfo< IPTI, VTX >::secondaryVertex(), pfDeepBoostedJetPreprocessParams_cfi::sv, HLT_2018_cff::track, UDSG_JETS, and reco::btau::vertexMass.

beginJob()

void PatBJetVertexAnalyzer::beginJob ( void  )

overridevirtual

Reimplemented from edm::EDAnalyzer.

Definition at line 72 of file PatBJetVertexAnalyzer.cc.

                                     {
  // 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);
  }
}

References ALL_JETS, B_JETS, C_JETS, GenHFHadronMatcher_cff::flavour, flavours_, mps_fire::i, TFileService::make(), N_JET_TYPES, Skims_PA_cff::name, HLTObjectsMonitor_cfi::plots, plots_, and UDSG_JETS.

Member Data Documentation

flavours_

TH1* PatBJetVertexAnalyzer::flavours_

private

Definition at line 55 of file PatBJetVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

jetEtaCut_

double PatBJetVertexAnalyzer::jetEtaCut_

private

Definition at line 48 of file PatBJetVertexAnalyzer.cc.

Referenced by analyze().

jetPtCut_

double PatBJetVertexAnalyzer::jetPtCut_

private

Definition at line 47 of file PatBJetVertexAnalyzer.cc.

Referenced by analyze().

jetsToken_

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

private

Definition at line 45 of file PatBJetVertexAnalyzer.cc.

Referenced by analyze().

maxDeltaR_

double PatBJetVertexAnalyzer::maxDeltaR_

private

Definition at line 49 of file PatBJetVertexAnalyzer.cc.

plots_

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

private

Referenced by analyze(), and beginJob().