#include <CandidateSeededTrackingRegionsProducer.h>

Inheritance diagram for CandidateSeededTrackingRegionsProducer:

Public Types
enum	Mode { BEAM_SPOT_FIXED, BEAM_SPOT_SIGMA, VERTICES_FIXED, VERTICES_SIGMA }
Public Member Functions
	CandidateSeededTrackingRegionsProducer (const edm::ParameterSet &conf)
virtual std::vector < TrackingRegion * >	regions (const edm::Event &e, const edm::EventSetup &es) const
virtual	~CandidateSeededTrackingRegionsProducer ()
Private Attributes
edm::InputTag	m_beamSpot
float	m_deltaEta
float	m_deltaPhi
edm::InputTag	m_input
int	m_maxNRegions
int	m_maxNVertices
std::string	m_measurementTrackerName
Mode	m_mode
float	m_nSigmaZBeamSpot
float	m_nSigmaZVertex
float	m_originRadius
bool	m_precise
float	m_ptMin
bool	m_searchOpt
edm::InputTag	m_vertexCollection
float	m_whereToUseMeasurementTracker
float	m_zErrorBeamSpot
float	m_zErrorVetex

Detailed Description

class CandidateSeededTrackingRegionsProducer

eta-phi TrackingRegions producer in directions defined by Candidate-based objects of interest from a collection defined by the "input" parameter.

Four operational modes are supported ("mode" parameter):

BeamSpotFixed: origin is defined by the beam spot z-half-length is defined by a fixed zErrorBeamSpot parameter BeamSpotSigma: origin is defined by the beam spot z-half-length is defined by nSigmaZBeamSpot * beamSpot.sigmaZ VerticesFixed: origins are defined by vertices from VertexCollection (use maximum MaxNVertices of them) z-half-length is defined by a fixed zErrorVetex parameter VerticesSigma: origins are defined by vertices from VertexCollection (use maximum MaxNVertices of them) z-half-length is defined by nSigmaZVertex * vetex.zError

If, while using one of the "Vertices" modes, there's no vertices in an event, we fall back into either BeamSpotSigma or BeamSpotFixed mode, depending on the positiveness of nSigmaZBeamSpot.

Author:: Vadim Khotilovich

Definition at line 44 of file CandidateSeededTrackingRegionsProducer.h.

Member Enumeration Documentation

enum CandidateSeededTrackingRegionsProducer::Mode

Enumerator:

BEAM_SPOT_FIXED
BEAM_SPOT_SIGMA
VERTICES_FIXED
VERTICES_SIGMA

Definition at line 48 of file CandidateSeededTrackingRegionsProducer.h.

{BEAM_SPOT_FIXED, BEAM_SPOT_SIGMA, VERTICES_FIXED, VERTICES_SIGMA } Mode;

Constructor & Destructor Documentation

CandidateSeededTrackingRegionsProducer::CandidateSeededTrackingRegionsProducer ( const edm::ParameterSet & conf ) [inline, explicit]

Definition at line 50 of file CandidateSeededTrackingRegionsProducer.h.

References BEAM_SPOT_FIXED, BEAM_SPOT_SIGMA, edm::ParameterSet::exists(), edm::ParameterSet::getParameter(), m_beamSpot, m_deltaEta, m_deltaPhi, m_input, m_maxNRegions, m_maxNVertices, m_measurementTrackerName, m_mode, m_nSigmaZBeamSpot, m_nSigmaZVertex, m_originRadius, m_precise, m_ptMin, m_searchOpt, m_vertexCollection, m_whereToUseMeasurementTracker, m_zErrorBeamSpot, m_zErrorVetex, VERTICES_FIXED, and VERTICES_SIGMA.

  {
    edm::ParameterSet regPSet = conf.getParameter<edm::ParameterSet>("RegionPSet");

    // operation mode
    std::string modeString       = regPSet.getParameter<std::string>("mode");
    if      (modeString == "BeamSpotFixed") m_mode = BEAM_SPOT_FIXED;
    else if (modeString == "BeamSpotSigma") m_mode = BEAM_SPOT_SIGMA;
    else if (modeString == "VerticesFixed") m_mode = VERTICES_FIXED;
    else if (modeString == "VerticesSigma") m_mode = VERTICES_SIGMA;
    else  edm::LogError ("CandidateSeededTrackingRegionsProducer")<<"Unknown mode string: "<<modeString;

    // basic inputs
    m_input            = regPSet.getParameter<edm::InputTag>("input");
    m_maxNRegions      = regPSet.getParameter<int>("maxNRegions");
    m_beamSpot         = regPSet.getParameter<edm::InputTag>("beamSpot");
    m_vertexCollection = edm::InputTag();
    m_maxNVertices     = 1;
    if (m_mode == VERTICES_FIXED || m_mode == VERTICES_SIGMA)
    {
      m_vertexCollection = regPSet.getParameter<edm::InputTag>("vertexCollection");
      m_maxNVertices     = regPSet.getParameter<int>("maxNVertices");
    }

    // RectangularEtaPhiTrackingRegion parameters:
    m_ptMin            = regPSet.getParameter<double>("ptMin");
    m_originRadius     = regPSet.getParameter<double>("originRadius");
    m_zErrorBeamSpot   = regPSet.getParameter<double>("zErrorBeamSpot");
    m_deltaEta         = regPSet.getParameter<double>("deltaEta");
    m_deltaPhi         = regPSet.getParameter<double>("deltaPhi");
    m_precise          = regPSet.getParameter<bool>("precise");
    m_measurementTrackerName       = "";
    m_whereToUseMeasurementTracker = 0;
    if (regPSet.exists("measurementTrackerName"))
    {
      m_measurementTrackerName = regPSet.getParameter<std::string>("measurementTrackerName");
      if (regPSet.exists("whereToUseMeasurementTracker"))
        m_whereToUseMeasurementTracker = regPSet.getParameter<double>("whereToUseMeasurementTracker");
    }
    m_searchOpt = false;
    if (regPSet.exists("searchOpt")) m_searchOpt = regPSet.getParameter<bool>("searchOpt");

    // mode-dependent z-halflength of tracking regions
    if (m_mode == VERTICES_SIGMA)  m_nSigmaZVertex   = regPSet.getParameter<double>("nSigmaZVertex");
    if (m_mode == VERTICES_FIXED)  m_zErrorVetex     = regPSet.getParameter<double>("zErrorVetex");
    m_nSigmaZBeamSpot = -1.;
    if (m_mode == BEAM_SPOT_SIGMA)
    {
      m_nSigmaZBeamSpot = regPSet.getParameter<double>("nSigmaZBeamSpot");
      if (m_nSigmaZBeamSpot < 0.)
        edm::LogError ("CandidateSeededTrackingRegionsProducer")<<"nSigmaZBeamSpot must be positive for BeamSpotSigma mode!";
    }
  }

virtual CandidateSeededTrackingRegionsProducer::~CandidateSeededTrackingRegionsProducer ( ) [inline, virtual]

Definition at line 104 of file CandidateSeededTrackingRegionsProducer.h.

{}

Member Function Documentation

virtual std::vector<TrackingRegion* > CandidateSeededTrackingRegionsProducer::regions	(	const edm::Event &	e,
		const edm::EventSetup &	es
	)		const `[inline, virtual]`

Implements TrackingRegionProducer.

Definition at line 107 of file CandidateSeededTrackingRegionsProducer.h.

References BEAM_SPOT_FIXED, BEAM_SPOT_SIGMA, first, edm::Event::getByLabel(), i, edm::HandleBase::isValid(), j, m_beamSpot, m_deltaEta, m_deltaPhi, m_input, m_maxNRegions, m_maxNVertices, m_measurementTrackerName, m_mode, m_nSigmaZBeamSpot, m_nSigmaZVertex, m_originRadius, m_precise, m_ptMin, m_searchOpt, m_vertexCollection, m_whereToUseMeasurementTracker, m_zErrorBeamSpot, m_zErrorVetex, query::result, edm::second(), v, VERTICES_FIXED, VERTICES_SIGMA, x, detailsBasic3DVector::y, and z.

  {
    std::vector<TrackingRegion* > result;

    // pick up the candidate objects of interest
    edm::Handle< reco::CandidateView > objects;
    e.getByLabel( m_input, objects );
    size_t n_objects = objects->size();
    if (n_objects == 0) return result;

    // always need the beam spot (as a fall back strategy for vertex modes)
    edm::Handle< reco::BeamSpot > bs;
    e.getByLabel( m_beamSpot, bs );
    if( !bs.isValid() ) return result;

    // this is a default origin for all modes
    GlobalPoint default_origin( bs->x0(), bs->y0(), bs->z0() );

    // vector of origin & halfLength pairs:
    std::vector< std::pair< GlobalPoint, float > > origins;

    // fill the origins and halfLengths depending on the mode
    if (m_mode == BEAM_SPOT_FIXED || m_mode == BEAM_SPOT_SIGMA)
    {
      origins.push_back( std::make_pair(
          default_origin,
          (m_mode == BEAM_SPOT_FIXED) ? m_zErrorBeamSpot : m_nSigmaZBeamSpot*bs->sigmaZ()
      ));
    }
    else if (m_mode == VERTICES_FIXED || m_mode == VERTICES_SIGMA)
    {
      edm::Handle< reco::VertexCollection > vertices;
      e.getByLabel( m_vertexCollection, vertices );
      int n_vert = 0;
      for (reco::VertexCollection::const_iterator v = vertices->begin(); v != vertices->end() && n_vert < m_maxNVertices; ++v)
      {
        if ( v->isFake() || !v->isValid() ) continue;

        origins.push_back( std::make_pair(
            GlobalPoint( v->x(), v->y(), v->z() ),
            (m_mode == VERTICES_FIXED) ? m_zErrorVetex : m_nSigmaZVertex*v->zError()
        ));
        ++n_vert;
      }
      // no-vertex fall-back case:
      if (origins.empty())
      {
        origins.push_back( std::make_pair(
            default_origin,
            (m_nSigmaZBeamSpot > 0.) ? m_nSigmaZBeamSpot*bs->z0Error() : m_zErrorBeamSpot
        ));
      }
    }
    
    // create tracking regions (maximum MaxNRegions of them) in directions of the
    // objects of interest (we expect that the collection was sorted in decreasing pt order)
    int n_regions = 0;
    for(size_t i = 0; i < n_objects && n_regions < m_maxNRegions; ++i )
    {
      const reco::Candidate & object = (*objects)[i];
      GlobalVector direction( object.momentum().x(), object.momentum().y(), object.momentum().z() );

      for (size_t  j=0; j<origins.size() && n_regions < m_maxNRegions; ++j)
      {
        result.push_back( new RectangularEtaPhiTrackingRegion(
          direction,
          origins[j].first,
          m_ptMin,
          m_originRadius,
          origins[j].second,
          m_deltaEta,
          m_deltaPhi,
          m_whereToUseMeasurementTracker,
          m_precise,
          m_measurementTrackerName,
          m_searchOpt
        ));
        ++n_regions;
      }
    }
    //std::cout<<"n_seeded_regions = "<<n_regions<<std::endl;
    edm::LogInfo ("CandidateSeededTrackingRegionsProducer") << "produced "<<n_regions<<" regions";

    return result;
  }