PFDisplacedVertexCandidateFinder Class Reference

#include <PFDisplacedVertexCandidateFinder.h>

Public Types
typedef reco::PFDisplacedVertexCandidateCollection::const_iterator	IBC
typedef std::list < reco::TrackBaseRef > ::iterator	IE
typedef std::list < reco::TrackBaseRef > ::const_iterator	IEC
typedef std::vector< bool >	Mask
	Mask used to spot if a track is free or not. More...

Public Member Functions
void	findDisplacedVertexCandidates ()
	-----— Main function which find vertices -----— /// More...
	PFDisplacedVertexCandidateFinder ()
void	setDebug (bool debug)
	sets debug printout flag More...
void	setInput (const edm::Handle< reco::TrackCollection > &trackh, const MagneticField *magField)
void	setParameters (double dcaCut, double primaryVertexCut, double dcaPInnerHitCut, const edm::ParameterSet &ps_trk)
	---—— Set different algo parameters —— /// More...
void	setPrimaryVertex (edm::Handle< reco::VertexCollection > mainVertexHandle, edm::Handle< reco::BeamSpot > beamSpotHandle)
std::auto_ptr < reco::PFDisplacedVertexCandidateCollection >	transferVertexCandidates ()
const std::auto_ptr < reco::PFDisplacedVertexCandidateCollection > &	vertexCandidates () const
	~PFDisplacedVertexCandidateFinder ()

Private Member Functions
IE	associate (IE next, IE last, reco::PFDisplacedVertexCandidate &tempVertexCandidate)
	--—— Different steps of the finder algorithm --—— /// More...
GlobalTrajectoryParameters	getGlobalTrajectoryParameters (const reco::Track *) const
	--—— TOOLS --—— // More...
bool	goodPtResolution (const reco::TrackBaseRef &trackref) const
	Quality Criterion on the Pt resolution to select a Track. More...
bool	isSelected (const reco::TrackBaseRef &trackref)
void	link (const reco::TrackBaseRef &el1, const reco::TrackBaseRef &el2, double &dist, GlobalPoint &P, reco::PFDisplacedVertexCandidate::VertexLinkTest &linktest)
	Check whether 2 elements are linked and fill the link parameters. More...
void	packLinks (reco::PFDisplacedVertexCandidate &vertexCandidate)

Private Attributes
double	dcaCut_
	–— Algo parameters for the vertex finder -— /// More...
double	dcaPInnerHitCut2_
	Maximum distance between the DCA Point and the inner hit of the track. More...
bool	debug_
	if true, debug printouts activated More...
double	dxy_
std::list< reco::TrackBaseRef >	eventTracks_
	The track refs. More...
std::vector < GlobalTrajectoryParameters >	eventTrackTrajectories_
const MagneticField *	magField_
double	nChi2_max_
double	primaryVertexCut2_
	Do not reconstruct vertices wich are too close to the beam pipe. More...
double	pt_min_
double	pt_min_prim_
math::XYZPoint	pvtx_
TwoTrackMinimumDistance	theMinimum_
Mask	trackMask_
std::auto_ptr < reco::PFDisplacedVertexCandidateCollection >	vertexCandidates_
	-----— Members -----— /// More...
unsigned	vertexCandidatesSize_

Friends
std::ostream &	operator<< (std::ostream &, const PFDisplacedVertexCandidateFinder &)

Detailed Description

Definition at line 24 of file PFDisplacedVertexCandidateFinder.h.

Member Typedef Documentation

typedef reco::PFDisplacedVertexCandidateCollection::const_iterator PFDisplacedVertexCandidateFinder::IBC

Definition at line 38 of file PFDisplacedVertexCandidateFinder.h.

typedef std::list< reco::TrackBaseRef >::iterator PFDisplacedVertexCandidateFinder::IE

Definition at line 36 of file PFDisplacedVertexCandidateFinder.h.

typedef std::list< reco::TrackBaseRef >::const_iterator PFDisplacedVertexCandidateFinder::IEC

Definition at line 37 of file PFDisplacedVertexCandidateFinder.h.

typedef std::vector<bool> PFDisplacedVertexCandidateFinder::Mask

Mask used to spot if a track is free or not.

Definition at line 34 of file PFDisplacedVertexCandidateFinder.h.

Constructor & Destructor Documentation

PFDisplacedVertexCandidateFinder::PFDisplacedVertexCandidateFinder

(

)

Definition at line 15 of file PFDisplacedVertexCandidateFinder.cc.

PFDisplacedVertexCandidateFinder::~PFDisplacedVertexCandidateFinder

(

)

Definition at line 28 of file PFDisplacedVertexCandidateFinder.cc.

Member Function Documentation

PFDisplacedVertexCandidateFinder::IE PFDisplacedVertexCandidateFinder::associate ( IE  next, IE  last, reco::PFDisplacedVertexCandidate &  tempVertexCandidate  )

private

--—— Different steps of the finder algorithm --—— ///

Recursive procedure to associate tracks together

Definition at line 129 of file PFDisplacedVertexCandidateFinder.cc.

void PFDisplacedVertexCandidateFinder::findDisplacedVertexCandidates

(

)

-----— Main function which find vertices -----— ///

Definition at line 94 of file PFDisplacedVertexCandidateFinder.cc.

GlobalTrajectoryParameters PFDisplacedVertexCandidateFinder::getGlobalTrajectoryParameters ( const reco::Track *  track ) const

private

--—— TOOLS --—— //

Allows to calculate the helix aproximation for a given track which may be then extrapolated to any point.

Definition at line 341 of file PFDisplacedVertexCandidateFinder.cc.

bool PFDisplacedVertexCandidateFinder::goodPtResolution ( const reco::TrackBaseRef &  trackref ) const

private

Quality Criterion on the Pt resolution to select a Track.

Definition at line 361 of file PFDisplacedVertexCandidateFinder.cc.

Referenced by isSelected().

bool PFDisplacedVertexCandidateFinder::isSelected ( const reco::TrackBaseRef &  trackref )

inlineprivate

A function which gather the information if a track is available for vertexing

Definition at line 110 of file PFDisplacedVertexCandidateFinder.h.

References goodPtResolution().

    { return goodPtResolution(trackref);}

void PFDisplacedVertexCandidateFinder::link ( const reco::TrackBaseRef &  el1, const reco::TrackBaseRef &  el2, double &  dist, GlobalPoint &  P, reco::PFDisplacedVertexCandidate::VertexLinkTest &  linktest  )

private

Check whether 2 elements are linked and fill the link parameters.

Definition at line 226 of file PFDisplacedVertexCandidateFinder.cc.

void PFDisplacedVertexCandidateFinder::packLinks ( reco::PFDisplacedVertexCandidate &  vertexCandidate )

private

Compute missing links in the displacedVertexCandidates (the recursive procedure does not build all links)

Definition at line 299 of file PFDisplacedVertexCandidateFinder.cc.

void PFDisplacedVertexCandidateFinder::setDebug ( bool  debug )

inline

sets debug printout flag

Definition at line 56 of file PFDisplacedVertexCandidateFinder.h.

References debug, and debug_.

{debug_ = debug;}

void PFDisplacedVertexCandidateFinder::setInput	(	const edm::Handle< reco::TrackCollection > &	trackh,
		const MagneticField *	magField
	)

Set the imput collection of tracks and calculate their trajectory parameters the Global Trajectory Parameters

Definition at line 60 of file PFDisplacedVertexCandidateFinder.cc.

void PFDisplacedVertexCandidateFinder::setParameters ( double  dcaCut, double  primaryVertexCut, double  dcaPInnerHitCut, const edm::ParameterSet &  ps_trk  )

inline

---—— Set different algo parameters —— ///

Sets algo parameters for the vertex candidate finder

Definition at line 44 of file PFDisplacedVertexCandidateFinder.h.

References dcaCut_, dcaPInnerHitCut2_, dxy_, edm::ParameterSet::getParameter(), nChi2_max_, primaryVertexCut2_, pt_min_, and pt_min_prim_.

                                            {
    dcaCut_ = dcaCut;
    primaryVertexCut2_ = primaryVertexCut*primaryVertexCut;
    dcaPInnerHitCut2_ = dcaPInnerHitCut*dcaPInnerHitCut;
    nChi2_max_ = ps_trk.getParameter<double>("nChi2_max");
    pt_min_ = ps_trk.getParameter<double>("pt_min");
    pt_min_prim_ = ps_trk.getParameter<double>("pt_min_prim");
    dxy_ = ps_trk.getParameter<double>("dxy");
  }

void PFDisplacedVertexCandidateFinder::setPrimaryVertex	(	edm::Handle< reco::VertexCollection >	mainVertexHandle,
		edm::Handle< reco::BeamSpot >	beamSpotHandle
	)

Definition at line 39 of file PFDisplacedVertexCandidateFinder.cc.

std::auto_ptr< reco::PFDisplacedVertexCandidateCollection > PFDisplacedVertexCandidateFinder::transferVertexCandidates ( )

inline

Returns

auto_ptr to collection of DisplacedVertexCandidates

Definition at line 65 of file PFDisplacedVertexCandidateFinder.h.

References vertexCandidates_.

{return vertexCandidates_;}

const std::auto_ptr< reco::PFDisplacedVertexCandidateCollection >& PFDisplacedVertexCandidateFinder::vertexCandidates ( ) const

inline

Definition at line 67 of file PFDisplacedVertexCandidateFinder.h.

References vertexCandidates_.

    {return vertexCandidates_;}

Friends And Related Function Documentation

std::ostream& operator<< ( std::ostream &  out, const PFDisplacedVertexCandidateFinder &  a  )

friend

Definition at line 398 of file PFDisplacedVertexCandidateFinder.cc.

Member Data Documentation

double PFDisplacedVertexCandidateFinder::dcaCut_

private

–— Algo parameters for the vertex finder -— ///

Distance of minimal approach below which two tracks are considered as linked together

Definition at line 138 of file PFDisplacedVertexCandidateFinder.h.

Referenced by setParameters().

double PFDisplacedVertexCandidateFinder::dcaPInnerHitCut2_

private

Maximum distance between the DCA Point and the inner hit of the track.

Definition at line 142 of file PFDisplacedVertexCandidateFinder.h.

Referenced by setParameters().

bool PFDisplacedVertexCandidateFinder::debug_

private

if true, debug printouts activated

Definition at line 163 of file PFDisplacedVertexCandidateFinder.h.

Referenced by setDebug().

double PFDisplacedVertexCandidateFinder::dxy_

private

Definition at line 151 of file PFDisplacedVertexCandidateFinder.h.

Referenced by setParameters().

std::list< reco::TrackBaseRef > PFDisplacedVertexCandidateFinder::eventTracks_

private

The track refs.

Definition at line 123 of file PFDisplacedVertexCandidateFinder.h.

std::vector< GlobalTrajectoryParameters > PFDisplacedVertexCandidateFinder::eventTrackTrajectories_

private

The Trajectories vector allow to calculate snd to store only once the track trajectory parameters

Definition at line 132 of file PFDisplacedVertexCandidateFinder.h.

const MagneticField* PFDisplacedVertexCandidateFinder::magField_

private

Definition at line 166 of file PFDisplacedVertexCandidateFinder.h.

double PFDisplacedVertexCandidateFinder::nChi2_max_

private

Tracks preselection to reduce the combinatorics in PFDisplacedVertexCandidates this cuts are repeated then in a smarter way in the PFDisplacedVertexFinder be sure you are consistent between them

Definition at line 147 of file PFDisplacedVertexCandidateFinder.h.

Referenced by setParameters().

double PFDisplacedVertexCandidateFinder::primaryVertexCut2_

private

Do not reconstruct vertices wich are too close to the beam pipe.

Definition at line 140 of file PFDisplacedVertexCandidateFinder.h.

Referenced by setParameters().

double PFDisplacedVertexCandidateFinder::pt_min_

private

Definition at line 148 of file PFDisplacedVertexCandidateFinder.h.

Referenced by setParameters().

double PFDisplacedVertexCandidateFinder::pt_min_prim_

private

Definition at line 150 of file PFDisplacedVertexCandidateFinder.h.

Referenced by setParameters().

math::XYZPoint PFDisplacedVertexCandidateFinder::pvtx_

private

Definition at line 160 of file PFDisplacedVertexCandidateFinder.h.

TwoTrackMinimumDistance PFDisplacedVertexCandidateFinder::theMinimum_

private

Definition at line 158 of file PFDisplacedVertexCandidateFinder.h.

Mask PFDisplacedVertexCandidateFinder::trackMask_

private

The trackMask allows to keep the information on the tracks which are still free and those which are already used or disabled.

Definition at line 129 of file PFDisplacedVertexCandidateFinder.h.

std::auto_ptr< reco::PFDisplacedVertexCandidateCollection > PFDisplacedVertexCandidateFinder::vertexCandidates_

private

-----— Members -----— ///

Definition at line 119 of file PFDisplacedVertexCandidateFinder.h.

Referenced by transferVertexCandidates(), and vertexCandidates().

unsigned PFDisplacedVertexCandidateFinder::vertexCandidatesSize_

private

Max number of expected vertexCandidates in the event Used to allocate the memory and avoid multiple copy

Definition at line 155 of file PFDisplacedVertexCandidateFinder.h.