Producer for DisplacedVertices. More...

#include <PFDisplacedVertexCandidateProducer.h>

Inheritance diagram for PFDisplacedVertexCandidateProducer:

Public Member Functions
	PFDisplacedVertexCandidateProducer (const edm::ParameterSet &)
virtual void	produce (edm::Event &, const edm::EventSetup &) override
	~PFDisplacedVertexCandidateProducer ()
Private Attributes
edm::InputTag	inputTagBeamSpot_
edm::InputTag	inputTagMainVertex_
	Input tag for main vertex to cut of dxy of secondary tracks.
edm::InputTag	inputTagTracks_
	Reco Tracks used to spot the nuclear interactions.
PFDisplacedVertexCandidateFinder	pfDisplacedVertexCandidateFinder_
	Displaced Vertex Candidates finder.
bool	verbose_
	verbose ?

Detailed Description

Producer for DisplacedVertices.

This producer makes use of DisplacedVertexCandidateFinder. This Finder loop recursively over reco::Tracks to find those which are linked together by the criterion which is by default the minimal approach distance.

Author:: Maxime Gouzevitch

Date:: November 2009

Definition at line 25 of file PFDisplacedVertexCandidateProducer.h.

Constructor & Destructor Documentation

PFDisplacedVertexCandidateProducer::PFDisplacedVertexCandidateProducer ( const edm::ParameterSet & iConfig ) [explicit]

Definition at line 22 of file PFDisplacedVertexCandidateProducer.cc.

References debug, edm::ParameterSet::getParameter(), and edm::ParameterSet::getUntrackedParameter().

                                                                                                     {
  
  // --- Setup input collection names --- //
  inputTagTracks_ 
    = iConfig.getParameter<InputTag>("trackCollection");

  inputTagMainVertex_ 
    = iConfig.getParameter<InputTag>("mainVertexLabel");

  inputTagBeamSpot_ 
    = iConfig.getParameter<InputTag>("offlineBeamSpotLabel");

  verbose_ = 
    iConfig.getUntrackedParameter<bool>("verbose");

  bool debug = 
    iConfig.getUntrackedParameter<bool>("debug");

  // ------ Algo Parameters ------ //

  // Distance of minimal approach below which 
  // two tracks are considered as linked together
  double dcaCut 
    = iConfig.getParameter< double >("dcaCut");   

  // Do not reconstruct vertices wich are 
  // too close to the beam pipe
  double primaryVertexCut
    = iConfig.getParameter< double >("primaryVertexCut");   

  //maximum distance between the DCA Point and the inner hit of the track
  double dcaPInnerHitCut
    = iConfig.getParameter< double >("dcaPInnerHitCut");  

  edm::ParameterSet ps_trk 
    = iConfig.getParameter<edm::ParameterSet>("tracksSelectorParameters");

  // Collection to be produced
  produces<reco::PFDisplacedVertexCandidateCollection>();

  // Vertex Finder parameters  -----------------------------------
  pfDisplacedVertexCandidateFinder_.setDebug(debug);
  pfDisplacedVertexCandidateFinder_.setParameters(dcaCut, primaryVertexCut, dcaPInnerHitCut, ps_trk);
     
}

PFDisplacedVertexCandidateProducer::~PFDisplacedVertexCandidateProducer ( )

Definition at line 69 of file PFDisplacedVertexCandidateProducer.cc.

{ }

Member Function Documentation

void PFDisplacedVertexCandidateProducer::produce	(	edm::Event &	iEvent,
		const edm::EventSetup &	iSetup
	)		`[override, virtual]`

Implements edm::EDProducer.

Definition at line 73 of file PFDisplacedVertexCandidateProducer.cc.

References gather_cfg::cout, edm::EventID::event(), edm::EventSetup::get(), edm::Event::getByLabel(), edm::EventBase::id(), LogDebug, edm::ESHandle< T >::product(), edm::Event::put(), and edm::EventID::run().

                                                   {
  
  LogDebug("PFDisplacedVertexCandidateProducer")<<"START event: "<<iEvent.id().event()
                             <<" in run "<<iEvent.id().run()<<endl;
  
  // Prepare and fill useful event information for the Finder
  edm::ESHandle<MagneticField> magField;
  iSetup.get<IdealMagneticFieldRecord>().get(magField);
  const MagneticField* theMagField = magField.product();

  Handle <reco::TrackCollection> trackCollection;
  iEvent.getByLabel(inputTagTracks_, trackCollection);
    
  Handle< reco::VertexCollection > mainVertexHandle;
  iEvent.getByLabel(inputTagMainVertex_, mainVertexHandle);

  Handle< reco::BeamSpot > beamSpotHandle;
  iEvent.getByLabel(inputTagBeamSpot_, beamSpotHandle);

  pfDisplacedVertexCandidateFinder_.setPrimaryVertex(mainVertexHandle, beamSpotHandle);
  pfDisplacedVertexCandidateFinder_.setInput( trackCollection, theMagField );


  // Run the finder
  pfDisplacedVertexCandidateFinder_.findDisplacedVertexCandidates();
  

  if(verbose_) {
    ostringstream  str;
    str<<pfDisplacedVertexCandidateFinder_<<endl;
    cout << pfDisplacedVertexCandidateFinder_<<endl;
    LogInfo("PFDisplacedVertexCandidateProducer") << str.str()<<endl;
  }    


  auto_ptr< reco::PFDisplacedVertexCandidateCollection > 
    pOutputDisplacedVertexCandidateCollection(
      pfDisplacedVertexCandidateFinder_.transferVertexCandidates() ); 
  
  
  iEvent.put(pOutputDisplacedVertexCandidateCollection);
 
  LogDebug("PFDisplacedVertexCandidateProducer")<<"STOP event: "<<iEvent.id().event()
                             <<" in run "<<iEvent.id().run()<<endl;

}