BeamSpot Class Reference

This class contains the beam spot position and size modeled as a gaussian distribution in space. More...

#include <BeamSpot.h>

Inheritance diagram for BeamSpot:

Collaboration diagram for BeamSpot:

Public Member Functions
	BeamSpot ()
	default constructor IP position at the nominal origin error on the position 0 in all directions Luminous region size set to 0 in all directions
	~BeamSpot ()
	Destructor.
bool	operator== (const BeamSpot &b) const
	equality operator
void	setSizeCovMatrix (const TMatrixDSym &size)
	Set the covariance matrix of the size of the IP position.
void	setIP (const ROOT::Math::XYZVector &ipPosition, const TMatrixDSym &covariance)
	Set the IP position and its error matrix.
const ROOT::Math::XYZVector &	getIPPosition () const
	Get the IP position.
const TMatrixDSym &	getIPPositionCovMatrix () const
	Get the covariance matrix of the measured IP position.
const TMatrixDSym &	getSizeCovMatrix () const
	Get the covariance matrix of the size of the IP position modeled as a gaussian.
TMatrixDSym	getCovVertex () const
	Get the total covariance matrix of theIP position (for compatibility with BeamParameters)

Static Public Member Functions
static unsigned short	getGlobalUniqueID ()
	Return unique ID of BeamSpot in global Millepede calibration (1)

Private Member Functions
	ClassDef (BeamSpot, 3)
	beam spot position and size

Private Attributes
ROOT::Math::XYZVector	m_IPPosition
	Beam spot position defined as the average position of the primary vertex.
TMatrixDSym	m_IPPositionCovMatrix
	CovMatrix of the measured beam spot position.
TMatrixDSym	m_sizeCovMatrix
	Size of the luminous region modeled with a three dimensional gaussian.

Detailed Description

This class contains the beam spot position and size modeled as a gaussian distribution in space.

Definition at line 22 of file BeamSpot.h.

Constructor & Destructor Documentation

BeamSpot()

BeamSpot ( )

inline

default constructor IP position at the nominal origin error on the position 0 in all directions Luminous region size set to 0 in all directions

Definition at line 30 of file BeamSpot.h.

              :  m_IPPosition(),
      m_IPPositionCovMatrix(3),
      m_sizeCovMatrix(3)
    { }

~BeamSpot()

~BeamSpot ( )

inline

Destructor.

Definition at line 36 of file BeamSpot.h.

{}

Member Function Documentation

getCovVertex()

TMatrixDSym getCovVertex ( ) const

inline

Get the total covariance matrix of theIP position (for compatibility with BeamParameters)

Definition at line 85 of file BeamSpot.h.

    {
      return  getSizeCovMatrix() + getIPPositionCovMatrix();
    }

getGlobalUniqueID()

static unsigned short getGlobalUniqueID ( )

inlinestatic

Return unique ID of BeamSpot in global Millepede calibration (1)

Definition at line 91 of file BeamSpot.h.

{ return 1; }

getIPPosition()

const ROOT::Math::XYZVector & getIPPosition ( ) const

inline

Get the IP position.

Definition at line 66 of file BeamSpot.h.

    {
      return m_IPPosition;
    }

getIPPositionCovMatrix()

const TMatrixDSym & getIPPositionCovMatrix ( ) const

inline

Get the covariance matrix of the measured IP position.

Definition at line 72 of file BeamSpot.h.

    {
      return m_IPPositionCovMatrix;
    }

getSizeCovMatrix()

const TMatrixDSym & getSizeCovMatrix ( ) const

inline

Get the covariance matrix of the size of the IP position modeled as a gaussian.

Definition at line 78 of file BeamSpot.h.

    {
      return m_sizeCovMatrix;
    }

operator==()

bool operator== ( const BeamSpot & b ) const

inline

equality operator

Definition at line 40 of file BeamSpot.h.

    {
      return
        b.m_IPPosition == m_IPPosition &&
        b.m_IPPositionCovMatrix == m_IPPositionCovMatrix &&
        b.m_sizeCovMatrix == m_sizeCovMatrix;
    }

setIP()

void setIP ( const ROOT::Math::XYZVector & ipPosition, const TMatrixDSym & covariance )

inline

Set the IP position and its error matrix.

Parameters

ipPosition	position in basf2 units: cm
covariance	covariance matrix of the vertex position.

Definition at line 59 of file BeamSpot.h.

    {
      m_IPPosition = ipPosition;
      m_IPPositionCovMatrix = covariance;
    }

setSizeCovMatrix()

void setSizeCovMatrix ( const TMatrixDSym & size )

inline

Set the covariance matrix of the size of the IP position.

The upper triangle will be saved.

Definition at line 50 of file BeamSpot.h.

    {
      m_sizeCovMatrix = size;
    }

Member Data Documentation

m_IPPosition

ROOT::Math::XYZVector m_IPPosition

private

Beam spot position defined as the average position of the primary vertex.

Definition at line 97 of file BeamSpot.h.

m_IPPositionCovMatrix

TMatrixDSym m_IPPositionCovMatrix

private

CovMatrix of the measured beam spot position.

Definition at line 100 of file BeamSpot.h.

m_sizeCovMatrix

TMatrixDSym m_sizeCovMatrix

private

Size of the luminous region modeled with a three dimensional gaussian.

Covariance matrix

Definition at line 104 of file BeamSpot.h.

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The documentation for this class was generated from the following file:

• mdst/dbobjects/include/BeamSpot.h