#include <SecondaryVertex.h>

Inheritance diagram for reco::SecondaryVertex:

Public Member Functions
Measurement1D	dist2d () const

Measurement1D	dist3d () const

	SecondaryVertex ()

	SecondaryVertex (const reco::Vertex &pv, const reco::Vertex &sv, const GlobalVector &direction, bool withPVError=false)

	~SecondaryVertex ()

Public Member Functions inherited from reco::Vertex
void	add (const TrackBaseRef &r, float w=1.0)
	add a reference to a Track More...

void	add (const TrackBaseRef &r, const Track &refTrack, float w=1.0)
	add the original a Track(reference) and the smoothed Track More...

double	chi2 () const
	chi-squares More...

double	covariance (int i, int j) const
	(i, j)-th element of error matrix, i, j = 0, ... 2 More...

CovarianceMatrix	covariance () const
	return SMatrix More...

Error	error () const
	return SMatrix More...

void	fill (CovarianceMatrix &v) const
	fill SMatrix More...

bool	hasRefittedTracks () const
	Checks whether refitted tracks are stored. More...

bool	isFake () const

bool	isValid () const
	Tells whether the vertex is valid. More...

double	ndof () const

double	normalizedChi2 () const
	chi-squared divided by n.d.o.f. More...

unsigned int	nTracks (float minWeight=0.5) const
	Returns the number of tracks in the vertex with weight above minWeight. More...

TrackBaseRef	originalTrack (const Track &refTrack) const

math::XYZTLorentzVectorD	p4 (float mass=0.13957018, float minWeight=0.5) const
	Returns the four momentum of the sum of the tracks, assuming the given mass for the decay products. More...

const Point &	position () const
	position More...

Track	refittedTrack (const TrackBaseRef &track) const

Track	refittedTrack (const TrackRef &track) const

const std::vector< Track > &	refittedTracks () const
	Returns the container of refitted tracks. More...

void	removeTracks ()

trackRef_iterator	tracks_begin () const
	first iterator over tracks More...

trackRef_iterator	tracks_end () const
	last iterator over tracks More...

size_t	tracksSize () const
	number of tracks More...

template<typename TREF >
float	trackWeight (const TREF &r) const
	returns the weight with which a Track has contributed to the vertex-fit. More...

	Vertex ()

	Vertex (const Point &, const Error &)
	Constructor for a fake vertex. More...

	Vertex (const Point &, const Error &, double chi2, double ndof, size_t size)
	constructor for a valid vertex, with all data More...

double	x () const
	x coordinate More...

double	xError () const
	error on x More...

double	y () const
	y coordinate More...

double	yError () const
	error on y More...

double	z () const
	y coordinate More...

double	zError () const
	error on z More...

Static Public Member Functions
static Measurement1D	computeDist2d (const reco::Vertex &pv, const reco::Vertex &sv, const GlobalVector &direction, bool withPVError)

static Measurement1D	computeDist3d (const reco::Vertex &pv, const reco::Vertex &sv, const GlobalVector &direction, bool withPVError)

Private Attributes
Measurement1D	dist2d_

Measurement1D	dist3d_

Additional Inherited Members
Public Types inherited from reco::Vertex
enum	{ dimension = 3 }
	error matrix dimension More...

enum	{ size = dimension * ( dimension + 1 ) / 2 }
	matix size More...

typedef math::Error< dimension > ::type	CovarianceMatrix
	covariance error matrix (3x3) More...

typedef math::Error< dimension > ::type	Error
	covariance error matrix (3x3) More...

typedef unsigned int	index
	index type More...

typedef math::XYZPoint	Point
	point in the space More...

typedef std::vector < TrackBaseRef > ::const_iterator	trackRef_iterator
	The iteratator for the vector<TrackRef> More...

Detailed Description

Definition at line 10 of file SecondaryVertex.h.

Constructor & Destructor Documentation

reco::SecondaryVertex::SecondaryVertex ( )

inline

Definition at line 12 of file SecondaryVertex.h.

12 {}

reco::SecondaryVertex::SecondaryVertex	(	const reco::Vertex &	pv,
		const reco::Vertex &	sv,
		const GlobalVector &	direction,
		bool	withPVError = `false`
	)

inline

Definition at line 13 of file SecondaryVertex.h.

                                               :
         reco::Vertex(sv),
         dist2d_(computeDist2d(pv, sv, direction, withPVError)),
         dist3d_(computeDist3d(pv, sv, direction, withPVError)) {}

reco::SecondaryVertex::~SecondaryVertex ( )

inline

Definition at line 20 of file SecondaryVertex.h.

20 {}

Member Function Documentation

Measurement1D SecondaryVertex::computeDist2d	(	const reco::Vertex &	pv,
		const reco::Vertex &	sv,
		const GlobalVector &	direction,
		bool	withPVError
	)

static

Definition at line 16 of file SecondaryVertex.cc.

References reco::Vertex::covariance(), alignCSCRings::e, reco::Vertex::error(), reco::Vertex::position(), and mathSSE::sqrt().

Referenced by PFRecoTauDiscriminationByFlight::discriminate().

 {
     typedef ROOT::Math::SVector<double, 2> SVector2;
     typedef ROOT::Math::SMatrix<double, 2, 2,
             ROOT::Math::MatRepSym<double, 2> > SMatrixSym2;
 
     SMatrixSym2 cov = sv.covariance().Sub<SMatrixSym2>(0, 0);
     if (withPVError)
         cov += pv.covariance().Sub<SMatrixSym2>(0, 0);
 
     SVector2 vector(sv.position().X() - pv.position().X(),
                     sv.position().Y() - pv.position().Y());
 
     double dist = ROOT::Math::Mag(vector);
     double error = ROOT::Math::Similarity(cov, vector);
     if (error > 0.0 && dist > 1.0e-9)
         error = std::sqrt(error) / dist;
     else
         error = -1.0;
 
     if ((vector[0] * direction.x() +
          vector[1] * direction.y()) < 0.0)
         dist = -dist;
 
     return Measurement1D(dist, error);
 }

Measurement1D SecondaryVertex::computeDist3d	(	const reco::Vertex &	pv,
		const reco::Vertex &	sv,
		const GlobalVector &	direction,
		bool	withPVError
	)

static

Definition at line 45 of file SecondaryVertex.cc.

References reco::Vertex::covariance(), alignCSCRings::e, reco::Vertex::error(), reco::Vertex::position(), and mathSSE::sqrt().

Referenced by CaloRecoTauDiscriminationByFlightPathSignificance::vertexSignificance(), and PFRecoTauDiscriminationByFlightPathSignificance::vertexSignificance().

 {
     typedef ROOT::Math::SVector<double, 3> SVector3;
     typedef ROOT::Math::SMatrix<double, 3, 3,
             ROOT::Math::MatRepSym<double, 3> > SMatrixSym3;
 
     SMatrixSym3 cov = sv.covariance();
     if (withPVError)
         cov += pv.covariance();
 
     SVector3 vector(sv.position().X() - pv.position().X(),
                     sv.position().Y() - pv.position().Y(),
                     sv.position().Z() - pv.position().Z());
 
     double dist = ROOT::Math::Mag(vector);
     double error = ROOT::Math::Similarity(cov, vector);
     if (error > 0.0 && dist > 1.0e-9)
         error = std::sqrt(error) / dist;
     else
         error = -1.0;
 
     if ((vector[0] * direction.x() +
          vector[1] * direction.y() +
          vector[2] * direction.z()) < 0.0)
         dist = -dist;
 
     return Measurement1D(dist, error);
 }