RhoLorentzVectorErr Class Reference

#include <RhoLorentzVectorErr.h>

Inheritance diagram for RhoLorentzVectorErr:

Public Types
enum	MPolarCoordinateIndex {   Mom = 0, Theta = 1, Phi = 2, Mass = 3,   NUM_MPCOORDINATES = 4 }
enum	EPolarCoordinateIndex {   Energy = 0, ETheta = 1, EPhi = 2, EMom = 3,   NUM_EPCOORDINATES = 4 }

Public Member Functions
	RhoLorentzVectorErr ()
	RhoLorentzVectorErr (const TLorentzVector &p)
	RhoLorentzVectorErr (const TLorentzVector &p, const RhoError &covMat)
	RhoLorentzVectorErr (const RhoVector3Err &p3, Double_t mass)
	RhoLorentzVectorErr (const RhoLorentzVectorErr &v)
virtual	~RhoLorentzVectorErr ()
RhoLorentzVectorErr &	operator= (const RhoLorentzVectorErr &v)
RhoLorentzVectorErr &	operator- ()
RhoLorentzVectorErr &	operator+= (const RhoLorentzVectorErr &v)
RhoLorentzVectorErr &	operator-= (const RhoLorentzVectorErr &v)
RhoLorentzVectorErr &	Transform (const TRotation &rot)
RhoLorentzVectorErr &	Transform (const TLorentzRotation &rot)
Double_t	DetermineChisq (const TLorentzVector &refVector)
const RhoError &	CovMatrix () const
void	SetCovMatrix (const RhoError &v)
void	PrintOn (std::ostream &o=std::cout) const

Private Attributes
RhoError *	fCovMatrix

Detailed Description

Definition at line 23 of file RhoLorentzVectorErr.h.

Member Enumeration Documentation

enum RhoLorentzVectorErr::EPolarCoordinateIndex

Enumerator
Energy
ETheta
EPhi
EMom
NUM_EPCOORDINATES

Definition at line 33 of file RhoLorentzVectorErr.h.

                               {
      Energy = 0,
      ETheta = 1,
      EPhi = 2,
      EMom = 3,
      NUM_EPCOORDINATES = 4
    };

enum RhoLorentzVectorErr::MPolarCoordinateIndex

Enumerator
Mom
Theta
Phi
Mass
NUM_MPCOORDINATES

Definition at line 26 of file RhoLorentzVectorErr.h.

                               {
      Mom = 0,
      Theta = 1,
      Phi = 2,
      Mass = 3,
      NUM_MPCOORDINATES = 4
    };

Constructor & Destructor Documentation

RhoLorentzVectorErr::RhoLorentzVectorErr

(

)

Definition at line 71 of file RhoLorentzVectorErr.cxx.

References fCovMatrix.

                                         : TLorentzVector()
{
  fCovMatrix = new RhoError ( 4 );
}

RhoLorentzVectorErr::RhoLorentzVectorErr

(

const TLorentzVector &

p

)

Definition at line 77 of file RhoLorentzVectorErr.cxx.

References fCovMatrix.

                                                                   :
  TLorentzVector ( p )
{
  fCovMatrix = new RhoError ( 4 );
}

RhoLorentzVectorErr::RhoLorentzVectorErr	(	const TLorentzVector &	p,
		const RhoError &	covMat
	)

Definition at line 83 of file RhoLorentzVectorErr.cxx.

References fCovMatrix.

                                                                                           :
  TLorentzVector ( p )
{
  fCovMatrix = new RhoError ( covMat );
}

RhoLorentzVectorErr::RhoLorentzVectorErr	(	const RhoVector3Err &	p3,
		Double_t	mass
	)

Definition at line 28 of file RhoLorentzVectorErr.cxx.

References RhoVector3Err::CovMatrix(), Double_t, energy, fCovMatrix, i, and SetCovMatrix().

                    :
  TLorentzVector ( ( const TVector3& ) p3, sqrt ( p3.Mag2() + mass* mass ) )
{
  int i=0,j=0;
  fCovMatrix = new RhoError ( 4 );
  // The 3-vector part of the error, initialized as a 0-matrix, then copied
  // from p3:
  TMatrixD p4Err ( 4,4 );
  for ( i = 0; i < 3; ++i ) {
    for ( j = i; j < 3; ++j ) { // start from j=i, since (i,j) = (j,i)
      p4Err ( i,j ) = p3.CovMatrix() ( i,j );
    }
  }

  // The energy part of the error:
  const Double_t energy = E();

  if ( energy != 0 ) {
    p4Err ( 4,4 ) = 0.0;
    for ( i = 0; i < 3; ++i ) {
      for ( j = 0; j < 3; ++j ) {
        p4Err ( 4,4 ) += p3[i] * p3[j] *
                         p3.CovMatrix() ( i, j );
      }
    }
    p4Err ( 4,4 ) /= ( energy * energy );
  }

  // The E-p correlated part of the error is
  // <(E - <E>) (Pi - <Pi>)> = dE/dPj Vjk dPi/dPk
  // Since dPi/dPk = delta_ik, we get dE/dPj Vji.
  for ( i = 0; i < 3; ++i ) {
    for ( j = 0; j < 3; ++j ) {
      p4Err ( i,3 ) += p3 ( j ) / energy * p3.CovMatrix() ( j,i );
      // No need to switch indices for a TMatrixD, so no p4Err(4,i)
    }
  }

  SetCovMatrix ( p4Err );
}

RhoLorentzVectorErr::RhoLorentzVectorErr

(

const RhoLorentzVectorErr &

v

)

Definition at line 90 of file RhoLorentzVectorErr.cxx.

References CovMatrix(), and fCovMatrix.

                                                                        : TLorentzVector ( v )
{
  fCovMatrix = new RhoError ( v.CovMatrix() );
}

virtual RhoLorentzVectorErr::~RhoLorentzVectorErr ( )

inlinevirtual

Definition at line 55 of file RhoLorentzVectorErr.h.

References fCovMatrix.

                                   {
      if(fCovMatrix)delete fCovMatrix;
    }

Member Function Documentation

const RhoError& RhoLorentzVectorErr::CovMatrix ( ) const

inline

Definition at line 103 of file RhoLorentzVectorErr.h.

References fCovMatrix.

Referenced by DecayTreeFitter::InteractionPoint::InteractionPoint(), operator+(), operator+=(), operator-(), operator-=(), operator=(), and RhoLorentzVectorErr().

                                                {
      return *fCovMatrix;
    }

Double_t RhoLorentzVectorErr::DetermineChisq

(

const TLorentzVector &

refVector

)

Definition at line 129 of file RhoLorentzVectorErr.cxx.

References RhoError::DetermineChisq(), fCovMatrix, T, X, Y, and Z.

{
  TVectorD temp ( 4 );
  temp ( 0 ) = refVector.X()-this->X();
  temp ( 1 ) = refVector.Y()-this->Y();
  temp ( 2 ) = refVector.Z()-this->Z();
  temp ( 3 ) = refVector.T()-this->T();

  return fCovMatrix->DetermineChisq ( temp );
}

RhoLorentzVectorErr & RhoLorentzVectorErr::operator+=

(

const RhoLorentzVectorErr &

v

)

Definition at line 113 of file RhoLorentzVectorErr.cxx.

References CovMatrix(), fCovMatrix, and operator+=().

{
  TLorentzVector::operator+= ( v );
  *fCovMatrix += v.CovMatrix();
  return *this;
}

RhoLorentzVectorErr & RhoLorentzVectorErr::operator-

(

)

Definition at line 107 of file RhoLorentzVectorErr.cxx.

{
  ( ( TLorentzVector ) *this ) *= -1.;
  return *this;  // fCovMatrix unaltered
}

RhoLorentzVectorErr & RhoLorentzVectorErr::operator-=

(

const RhoLorentzVectorErr &

v

)

Definition at line 120 of file RhoLorentzVectorErr.cxx.

References CovMatrix(), fCovMatrix, and operator-=().

{
  TLorentzVector::operator-= ( v );
  *fCovMatrix += v.CovMatrix();
  return *this;
}

RhoLorentzVectorErr & RhoLorentzVectorErr::operator=

(

const RhoLorentzVectorErr &

v

)

Definition at line 96 of file RhoLorentzVectorErr.cxx.

References CovMatrix(), and fCovMatrix.

{
  if ( this != &v ) {
    TLorentzVector::operator= ( v );
    fCovMatrix = new RhoError ( v.CovMatrix() );
  }
  return *this;
}

void RhoLorentzVectorErr::PrintOn

(

std::ostream &

o = std::cout

)

const

Definition at line 206 of file RhoLorentzVectorErr.cxx.

References T, X, Y, and Z.

Referenced by operator<<().

{
  out << X() << "\t" << Y() << "\t" << Z() << "\t" << T();
}

void RhoLorentzVectorErr::SetCovMatrix ( const RhoError &  v )

inline

Definition at line 106 of file RhoLorentzVectorErr.h.

References fCovMatrix.

Referenced by RhoLorentzVectorErr().

                                                   {
      if(fCovMatrix)delete fCovMatrix;
      fCovMatrix = new RhoError ( v );
    }

RhoLorentzVectorErr & RhoLorentzVectorErr::Transform

(

const TRotation &

rot

)

Definition at line 152 of file RhoLorentzVectorErr.cxx.

References col, fCovMatrix, rot, row, and RhoError::Similarity().

{
  TLorentzVector::Transform ( rot );
  TMatrixD tempRot ( 4,4 );

  // Fill a 4x4 matrix from the 3x3 TRotation. Note that they use different
  // indexing schemes (!?@#$&^*&#$@#):

  int row;
  int col;
  for ( row = 0; row < 3; ++row ) { // 3 is the size of TRotation
    for ( col = 0; col < 3; ++col ) { // (which provides no enum)
      tempRot ( row, col ) = rot ( row, col );
    }
  }

  // fill the 4th row:
  tempRot ( 3,3 ) = 1.0;
  for ( col = 0; col < 3; ++col ) {
    tempRot ( 3, col ) = 0.0;
  }

  // fill the 4th column:
  for ( row = 0; row < 3; ++row ) {
    tempRot ( row, 3 ) = 0.0;
  }

  *fCovMatrix = fCovMatrix->Similarity ( tempRot );
  return *this;
}

RhoLorentzVectorErr & RhoLorentzVectorErr::Transform

(

const TLorentzRotation &

rot

)

Definition at line 143 of file RhoLorentzVectorErr.cxx.

References fCovMatrix, and RhoError::Similarity().

{
  TLorentzVector::Transform ( rot );
  *fCovMatrix = fCovMatrix->Similarity ( rot );
  return *this;
}

Member Data Documentation

RhoError* RhoLorentzVectorErr::fCovMatrix

private

Definition at line 115 of file RhoLorentzVectorErr.h.

Referenced by CovMatrix(), DetermineChisq(), operator+=(), operator-=(), operator=(), RhoLorentzVectorErr(), SetCovMatrix(), Transform(), and ~RhoLorentzVectorErr().

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

• RhoLorentzVectorErr.h
• RhoLorentzVectorErr.cxx