TFitParticleMomDev Class Reference

#include <TFitParticleMomDev.h>

Inheritance diagram for TFitParticleMomDev:

Public Member Functions
virtual TLorentzVector *	calc4Vec (const TMatrixD *params)
virtual TAbsFitParticle *	clone (const TString &newname=TString("")) const
virtual TMatrixD *	getDerivative ()
virtual void	setIni4Vec (const TLorentzVector *pini)
	TFitParticleMomDev ()
	TFitParticleMomDev (const TFitParticleMomDev &fitParticle)
	TFitParticleMomDev (TLorentzVector *pini, const TMatrixD *theCovMatrix)
	TFitParticleMomDev (const TString &name, const TString &title, TLorentzVector *pini, const TMatrixD *theCovMatrix)
virtual TMatrixD *	transform (const TLorentzVector &vec)
virtual	~TFitParticleMomDev ()
Public Member Functions inherited from TAbsFitParticle
virtual void	applycorr (TMatrixD *corrMatrix)
virtual const TMatrixD *	getCovMatrix () const
virtual const TMatrixD *	getCovMatrixDeltaY ()
virtual const TMatrixD *	getCovMatrixFit () const
const TLorentzVector *	getCurr4Vec ()
TString	getInfoString ()
const TLorentzVector *	getIni4Vec ()
Int_t	getNPar () const
const TMatrixD *	getParCurr ()
const TMatrixD *	getParIni ()
virtual const TMatrixD *	getPull ()
const TVector3 *	getu1 ()
const TVector3 *	getu2 ()
const TVector3 *	getu3 ()
virtual void	print ()
virtual void	reset ()
virtual void	setCovMatrix (const TMatrixD *theCovMatrix)
virtual void	setCovMatrixFit (const TMatrixD *theCovMatrixFit)
void	setParIni (const TMatrixD *parini)
	TAbsFitParticle ()
	TAbsFitParticle (const TString &name, const TString &title)
virtual	~TAbsFitParticle ()

Protected Member Functions
void	init (TLorentzVector *pini, const TMatrixD *theCovMatrix)
Protected Member Functions inherited from TAbsFitParticle
void	calcCovMatrixDeltaY ()

Additional Inherited Members
Protected Attributes inherited from TAbsFitParticle
TMatrixD	_covMatrix
TMatrixD	_covMatrixDeltaY
TMatrixD	_covMatrixFit
TMatrixD	_iniparameters
Int_t	_nPar
TMatrixD	_parameters
TLorentzVector	_pcurr
TLorentzVector	_pini
TMatrixD	_pull
TVector3	_u1
TVector3	_u2
TVector3	_u3

Detailed Description

Definition at line 12 of file TFitParticleMomDev.h.

Constructor & Destructor Documentation

TFitParticleMomDev::TFitParticleMomDev

(

)

Definition at line 34 of file TFitParticleMomDev.cc.

References init().

Referenced by clone().

  :TAbsFitParticle()  
{
  init(0, 0);
}

TFitParticleMomDev::TFitParticleMomDev

(

const TFitParticleMomDev &

fitParticle

)

Definition at line 40 of file TFitParticleMomDev.cc.

References TAbsFitParticle::_covMatrix, TAbsFitParticle::_iniparameters, TAbsFitParticle::_nPar, TAbsFitParticle::_parameters, TAbsFitParticle::_pcurr, TAbsFitParticle::_pini, TAbsFitParticle::_u1, TAbsFitParticle::_u2, and TAbsFitParticle::_u3.

  :TAbsFitParticle( fitParticle.GetName(), fitParticle.GetTitle() )
{

  _nPar = fitParticle._nPar;
  _u1 = fitParticle._u1;
  _u2 = fitParticle._u2;
  _u3 = fitParticle._u3;
  _covMatrix.ResizeTo(  fitParticle._covMatrix );
  _covMatrix = fitParticle._covMatrix;
  _iniparameters.ResizeTo( fitParticle._iniparameters );
  _iniparameters = fitParticle._iniparameters;
  _parameters.ResizeTo( fitParticle._parameters );
  _parameters = fitParticle._parameters;
  _pini = fitParticle._pini;
  _pcurr = fitParticle._pcurr;

}

TFitParticleMomDev::TFitParticleMomDev	(	TLorentzVector *	pini,
		const TMatrixD *	theCovMatrix
	)

Definition at line 59 of file TFitParticleMomDev.cc.

References init().

  :TAbsFitParticle()  
{
  init(pini, theCovMatrix);
}

TFitParticleMomDev::TFitParticleMomDev	(	const TString &	name,
		const TString &	title,
		TLorentzVector *	pini,
		const TMatrixD *	theCovMatrix
	)

Definition at line 65 of file TFitParticleMomDev.cc.

References init().

  :TAbsFitParticle(name, title)  
{
  init(pini, theCovMatrix);
}

TFitParticleMomDev::~TFitParticleMomDev ( )

virtual

Definition at line 84 of file TFitParticleMomDev.cc.

                                        {

}

Member Function Documentation

TLorentzVector * TFitParticleMomDev::calc4Vec ( const TMatrixD *  params )

virtual

Implements TAbsFitParticle.

Definition at line 141 of file TFitParticleMomDev.cc.

References TAbsFitParticle::_nPar, TAbsFitParticle::_pini, TAbsFitParticle::_u1, TAbsFitParticle::_u2, TAbsFitParticle::_u3, X, DOFs::Y, and DOFs::Z.

                                                                     {
  // Calculates a 4vector corresponding to the given
  // parameter values

  if (params == 0) {
    return 0;
  }

  if ( params->GetNcols() != 1 || params->GetNrows() !=_nPar ) {
    edm::LogError ("WrongMatrixSize")
      << GetName() << "::calc4Vec - Parameter matrix has wrong size.";
    return 0;
  }

  Double_t X = _pini.P() * (*params)(0,0) *_u1.X() +
    (*params)(1,0) * _u2.X()+
    (*params)(2,0) * _u3.X();
  Double_t Y = _pini.P() * (*params)(0,0) *_u1.Y() +
    (*params)(1,0) * _u2.Y()+
    (*params)(2,0) * _u3.Y();
  Double_t Z = _pini.P() * (*params)(0,0) *_u1.Z() +
    (*params)(1,0) * _u2.Z()+
    (*params)(2,0) * _u3.Z();
  Double_t E =  TMath::Sqrt( X*X + Y*Y + Z*Z + (*params)(3,0)*(*params)(3,0)*_pini.M2() );

  TLorentzVector* vec = new TLorentzVector( X, Y, Z, E );
  return vec;

}

TAbsFitParticle * TFitParticleMomDev::clone ( const TString &  newname = TString("") ) const

virtual

Implements TAbsFitParticle.

Definition at line 72 of file TFitParticleMomDev.cc.

References TFitParticleMomDev().

                                                                         {
  // Returns a copy of itself
  
  TAbsFitParticle* myclone = new TFitParticleMomDev( *this );
  if ( newname.Length() > 0 ) myclone->SetName(newname);
  return myclone;

}

TMatrixD * TFitParticleMomDev::getDerivative ( )

virtual

Implements TAbsFitParticle.

Definition at line 171 of file TFitParticleMomDev.cc.

References TAbsFitParticle::_parameters, TAbsFitParticle::_pcurr, TAbsFitParticle::_pini, TAbsFitParticle::_u1, TAbsFitParticle::_u2, and TAbsFitParticle::_u3.

                                            {
  // returns derivative dP/dy with P=(p,E) and y=(r, theta, phi, d) 
  // the free parameters of the fit. The columns of the matrix contain 
  // (dP/dr, dP/dtheta, dP/dphi, dP/dd).

  TMatrixD* DerivativeMatrix = new TMatrixD(4,4);
  (*DerivativeMatrix) *= 0.;

  //1st column: dP/dr
  (*DerivativeMatrix)(0,0)=_pini.P()*_u1.X();
  (*DerivativeMatrix)(1,0)=_pini.P()*_u1.Y();
  (*DerivativeMatrix)(2,0)=_pini.P()*_u1.Z();
  (*DerivativeMatrix)(3,0)=0.;

  //2nd column: dP/dtheta
  (*DerivativeMatrix)(0,1)=_u2.X();
  (*DerivativeMatrix)(1,1)=_u2.Y();
  (*DerivativeMatrix)(2,1)=_u2.Z();
  (*DerivativeMatrix)(3,1)=0.;

   //3rd column: dP/dphi
  (*DerivativeMatrix)(0,2)=_u3.X();
  (*DerivativeMatrix)(1,2)=_u3.Y();
  (*DerivativeMatrix)(2,2)=_u3.Z();
  (*DerivativeMatrix)(3,2)=0.;

   //4th column: dP/dm
  (*DerivativeMatrix)(0,3)=0.;
  (*DerivativeMatrix)(1,3)=0.;
  (*DerivativeMatrix)(2,3)=0.;
  (*DerivativeMatrix)(3,3)=_pini.M()*_pini.M()*_parameters(3,0)/_pcurr.E();

  return DerivativeMatrix;  
}

void TFitParticleMomDev::init ( TLorentzVector *  pini, const TMatrixD *  theCovMatrix  )

protected

Definition at line 91 of file TFitParticleMomDev.cc.

References TAbsFitParticle::_iniparameters, TAbsFitParticle::_nPar, TAbsFitParticle::_parameters, TAbsFitParticle::setCovMatrix(), and setIni4Vec().

Referenced by TFitParticleMomDev().

                                                                                 {

  _nPar = 4;
  _iniparameters.ResizeTo(_nPar,1);
  _iniparameters(0,0)=1.;
  _iniparameters(1,0)=0.;
  _iniparameters(2,0)=0.;
  _iniparameters(3,0)=1.;
  _parameters.ResizeTo(_nPar,1);
  _parameters = _iniparameters;
  setIni4Vec(pini);
  setCovMatrix(theCovMatrix);


}

void TFitParticleMomDev::setIni4Vec ( const TLorentzVector *  pini )

virtual

Implements TAbsFitParticle.

Definition at line 107 of file TFitParticleMomDev.cc.

References TAbsFitParticle::_iniparameters, TAbsFitParticle::_parameters, TAbsFitParticle::_pcurr, TAbsFitParticle::_pini, TAbsFitParticle::_u1, TAbsFitParticle::_u2, and TAbsFitParticle::_u3.

Referenced by init().

                                                              {
  // Set the initial 4vector. Will also set the 
  // inital parameter values

  if (pini == 0) {

    _u1.SetXYZ(0., 0., 0.);
    _u3.SetXYZ(0., 0., 0.);
    _u2.SetXYZ(0., 0., 0.);
    _pini.SetXYZT(0., 0., 0., 0.);
    _pcurr = _pini;
    
  } else {
    
    _pini = (*pini);
    _pcurr = _pini;

    _u1 = pini->Vect();
    _u1 *= 1./_u1.Mag();
    
    TVector3 uz(0., 0., 1.);
    _u3 = uz.Cross(_u1);
    _u3 *= 1./_u3.Mag();
    
    _u2 = _u3.Cross(_u1);
    _u2 *= 1./_u2.Mag();

  }

  // reset parameters
  _parameters = _iniparameters;

}

TMatrixD * TFitParticleMomDev::transform ( const TLorentzVector &  vec )

virtual

Implements TAbsFitParticle.

Definition at line 206 of file TFitParticleMomDev.cc.

References TAbsFitParticle::_nPar, TAbsFitParticle::_pini, TAbsFitParticle::_u1, TAbsFitParticle::_u2, TAbsFitParticle::_u3, and makeMuonMisalignmentScenario::rot.

                                                                 {
  // Returns the parameters corresponding to the given 
  // 4vector wrt. to the current base vectors u_r, u_theta, and u_phi

  // construct rotation matrix
  TRotation rot;
  rot.RotateAxes( _u1, _u2, _u3 );
  rot.Invert();

  // rotate vector
  TVector3 vec3( vec.Vect() );
  vec3.Transform( rot );

  // retrieve parameters
  TMatrixD* tparams = new TMatrixD( _nPar, 1 );
  (*tparams)(0,0) = vec3(0)/_pini.P();
  (*tparams)(1,0) = vec3(1);
  (*tparams)(2,0) = vec3(2);
  (*tparams)(3,0) = vec.M()/_pini.M();

  return tparams;

}