PatVertexAnalyzer Class Reference

Inheritance diagram for PatVertexAnalyzer:

Public Member Functions
virtual void	analyze (const edm::Event &event, const edm::EventSetup &es)
virtual void	beginJob ()
	PatVertexAnalyzer (const edm::ParameterSet &params)
	constructor and destructor More...
	~PatVertexAnalyzer ()
Public Member Functions inherited from edm::EDAnalyzer
	EDAnalyzer ()
std::string	workerType () const
virtual	~EDAnalyzer ()

Private Attributes
edm::InputTag	genParticles_
TH1 *	nTracks_
TH1 *	nVertices_
edm::InputTag	src_
TH1 *	x_
TH1 *	xDelta_
TH1 *	xErr_
TH1 *	xPull_
TH1 *	y_
TH1 *	yDelta_
TH1 *	yErr_
TH1 *	yPull_
TH1 *	z_
TH1 *	zDelta_
TH1 *	zErr_
TH1 *	zPull_

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

Detailed Description

Definition at line 26 of file PatVertexAnalyzer.cc.

Constructor & Destructor Documentation

PatVertexAnalyzer::PatVertexAnalyzer

(

const edm::ParameterSet &

params

)

constructor and destructor

Definition at line 48 of file PatVertexAnalyzer.cc.

                                                                  :
    src_(params.getParameter<edm::InputTag>("src")),
    genParticles_(params.getParameter<edm::InputTag>("mc"))
{
}

PatVertexAnalyzer::~PatVertexAnalyzer

(

)

Definition at line 54 of file PatVertexAnalyzer.cc.

{
}

Member Function Documentation

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

virtual

Implements edm::EDAnalyzer.

Definition at line 80 of file PatVertexAnalyzer.cc.

References genParticles_, nTracks_, nVertices_, src_, reco::Vertex::tracksSize(), reco::Vertex::x(), x_, xDelta_, xErr_, reco::Vertex::xError(), xPull_, reco::Vertex::y(), y_, yDelta_, yErr_, reco::Vertex::yError(), yPull_, reco::Vertex::z(), z_, zDelta_, zErr_, reco::Vertex::zError(), and zPull_.

{  
    // handle to the primary vertex collection
    edm::Handle<reco::VertexCollection> pvHandle;
    event.getByLabel(src_, pvHandle);

    // handle to the generator particles (i.e. the MC truth)
    edm::Handle<reco::GenParticleCollection> genParticlesHandle;
    event.getByLabel(genParticles_, genParticlesHandle);

    // extract the position of the simulated vertex
    math::XYZPoint simPV = (*genParticlesHandle)[2].vertex();

    // the number of reconstructed primary vertices
    nVertices_->Fill(pvHandle->size());

    // if we have at least one, use the first (highest pt^2 sum)
    if (!pvHandle->empty()) {
        const reco::Vertex &pv = (*pvHandle)[0];

        nTracks_->Fill(pv.tracksSize());

        x_->Fill(pv.x());
        y_->Fill(pv.y());
        z_->Fill(pv.z());

        xErr_->Fill(pv.xError());
        yErr_->Fill(pv.yError());
        zErr_->Fill(pv.zError());

        xDelta_->Fill(pv.x() - simPV.X());
        yDelta_->Fill(pv.y() - simPV.Y());
        zDelta_->Fill(pv.z() - simPV.Z());

        xPull_->Fill((pv.x() - simPV.X()) / pv.xError());
        yPull_->Fill((pv.y() - simPV.Y()) / pv.yError());
        zPull_->Fill((pv.z() - simPV.Z()) / pv.zError());

        // we could access the tracks using the
        // pv.tracks_begin() ... pv.tracks_end() iterators
    }
}

void PatVertexAnalyzer::beginJob ( void  )

virtual

Reimplemented from edm::EDAnalyzer.

Definition at line 58 of file PatVertexAnalyzer.cc.

References TFileDirectory::make(), nTracks_, nVertices_, x_, xDelta_, xErr_, xPull_, y_, yDelta_, yErr_, yPull_, z_, zDelta_, zErr_, and zPull_.

{
    // retrieve handle to auxiliary service
    //  used for storing histograms into ROOT file
    edm::Service<TFileService> fs;

    nVertices_ = fs->make<TH1F>("nVertices", "number of reconstructed primary vertices", 50, 0, 50);
    nTracks_ = fs->make<TH1F>("nTracks", "number of tracks at primary vertex", 100, 0, 300);
    x_ = fs->make<TH1F>("pvX", "primary vertex x", 100, -0.1, 0.1);
    y_ = fs->make<TH1F>("pvY", "primary vertex y", 100, -0.1, 0.1);
    z_ = fs->make<TH1F>("pvZ", "primary vertex z", 100, -30, 30);
    xErr_ = fs->make<TH1F>("pvErrorX", "primary vertex x error", 100, 0, 0.005);
    yErr_ = fs->make<TH1F>("pvErrorY", "primary vertex y error", 100, 0, 0.005);
    zErr_ = fs->make<TH1F>("pvErrorZ", "primary vertex z error", 100, 0, 0.01);
    xDelta_ = fs->make<TH1F>("pvDeltaX", "x shift wrt simulated vertex", 100, -0.01, 0.01);
    yDelta_ = fs->make<TH1F>("pvDeltaY", "y shift wrt simulated vertex", 100, -0.01, 0.01);
    zDelta_ = fs->make<TH1F>("pvDeltaZ", "z shift wrt simulated vertex", 100, -0.02, 0.02);
    xPull_ = fs->make<TH1F>("pvPullX", "primary vertex x pull", 100, -5, 5);
    yPull_ = fs->make<TH1F>("pvPullY", "primary vertex y pull", 100, -5, 5);
    zPull_ = fs->make<TH1F>("pvPullZ", "primary vertex z pull", 100, -5, 5);
}

Member Data Documentation

edm::InputTag PatVertexAnalyzer::genParticles_

private

Definition at line 39 of file PatVertexAnalyzer.cc.

Referenced by analyze().

TH1 * PatVertexAnalyzer::nTracks_

private

Definition at line 41 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

TH1* PatVertexAnalyzer::nVertices_

private

Definition at line 41 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

edm::InputTag PatVertexAnalyzer::src_

private

Definition at line 38 of file PatVertexAnalyzer.cc.

Referenced by analyze().

TH1* PatVertexAnalyzer::x_

private

Definition at line 42 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

TH1* PatVertexAnalyzer::xDelta_

private

Definition at line 44 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

TH1* PatVertexAnalyzer::xErr_

private

Definition at line 43 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

TH1* PatVertexAnalyzer::xPull_

private

Definition at line 45 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

TH1 * PatVertexAnalyzer::y_

private

Definition at line 42 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

TH1 * PatVertexAnalyzer::yDelta_

private

Definition at line 44 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

TH1 * PatVertexAnalyzer::yErr_

private

Definition at line 43 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

TH1 * PatVertexAnalyzer::yPull_

private

Definition at line 45 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

TH1 * PatVertexAnalyzer::z_

private

Definition at line 42 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

TH1 * PatVertexAnalyzer::zDelta_

private

Definition at line 44 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

TH1 * PatVertexAnalyzer::zErr_

private

Definition at line 43 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().

TH1 * PatVertexAnalyzer::zPull_

private

Definition at line 45 of file PatVertexAnalyzer.cc.

Referenced by analyze(), and beginJob().