TFitParticleEtThetaPhi Class Reference

#include <TFitParticleEtThetaPhi.h>

Inheritance diagram for TFitParticleEtThetaPhi:

Public Member Functions
TLorentzVector *	calc4Vec (const TMatrixD *params) override
TAbsFitParticle *	clone (const TString &newname="") const override
TMatrixD *	getDerivative () override
void	setIni4Vec (const TLorentzVector *pini) override
	TFitParticleEtThetaPhi ()
	TFitParticleEtThetaPhi (const TFitParticleEtThetaPhi &fitParticle)
	TFitParticleEtThetaPhi (TLorentzVector *pini, const TMatrixD *theCovMatrix)
	TFitParticleEtThetaPhi (const TString &name, const TString &title, TLorentzVector *pini, const TMatrixD *theCovMatrix)
TMatrixD *	transform (const TLorentzVector &vec) override
	~TFitParticleEtThetaPhi () override
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)
	~TAbsFitParticle () override

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 8 of file TFitParticleEtThetaPhi.h.

Constructor & Destructor Documentation

TFitParticleEtThetaPhi::TFitParticleEtThetaPhi

(

)

Definition at line 27 of file TFitParticleEtThetaPhi.cc.

References init().

Referenced by clone().

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

TFitParticleEtThetaPhi::TFitParticleEtThetaPhi

(

const TFitParticleEtThetaPhi &

fitParticle

)

Definition at line 29 of file TFitParticleEtThetaPhi.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;
}

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

Definition at line 45 of file TFitParticleEtThetaPhi.cc.

References init().

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

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

Definition at line 49 of file TFitParticleEtThetaPhi.cc.

References init().

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

TFitParticleEtThetaPhi::~TFitParticleEtThetaPhi ( )

override

Definition at line 69 of file TFitParticleEtThetaPhi.cc.

{}

Member Function Documentation

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

overridevirtual

Implements TAbsFitParticle.

Definition at line 80 of file TFitParticleEtThetaPhi.cc.

References TAbsFitParticle::_nPar, phi, theta(), X, BeamSpotPI::Y, and BeamSpotPI::Z.

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

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

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

  Double_t et = (*params)(0, 0);
  Double_t theta = (*params)(1, 0);
  Double_t phi = (*params)(2, 0);

  Double_t X = et * TMath::Cos(phi);
  Double_t Y = et * TMath::Sin(phi);
  Double_t Z = et / TMath::Tan(theta);
  Double_t E = et / TMath::Sin(theta);

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

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

overridevirtual

Implements TAbsFitParticle.

Definition at line 57 of file TFitParticleEtThetaPhi.cc.

References TFitParticleEtThetaPhi().

                                                                           {
  // Returns a copy of itself

  TAbsFitParticle* myclone = new TFitParticleEtThetaPhi(*this);
  if (newname.Length() > 0)
    myclone->SetName(newname);
  return myclone;
}

TMatrixD * TFitParticleEtThetaPhi::getDerivative ( )

overridevirtual

Implements TAbsFitParticle.

Definition at line 151 of file TFitParticleEtThetaPhi.cc.

References TAbsFitParticle::_parameters, phi, and theta().

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

  TMatrixD* DerivativeMatrix = new TMatrixD(4, 3);
  (*DerivativeMatrix) *= 0.;

  Double_t et = _parameters(0, 0);
  Double_t theta = _parameters(1, 0);
  Double_t phi = _parameters(2, 0);

  Double_t CotanTheta = 1. / TMath::Tan(theta);

  //1st column: dP/d(et)
  (*DerivativeMatrix)(0, 0) = TMath::Cos(phi);
  (*DerivativeMatrix)(1, 0) = TMath::Sin(phi);
  (*DerivativeMatrix)(2, 0) = CotanTheta;
  (*DerivativeMatrix)(3, 0) = 1. / TMath::Sin(theta);

  //2nd column: dP/d(theta)
  (*DerivativeMatrix)(0, 1) = 0.;
  (*DerivativeMatrix)(1, 1) = 0.;
  (*DerivativeMatrix)(2, 1) = -1. * et * (1. + CotanTheta * CotanTheta);
  (*DerivativeMatrix)(3, 1) = -1. * et * CotanTheta / (TMath::Sin(theta));

  //3rd column: dP/d(phi)
  (*DerivativeMatrix)(0, 2) = -1. * et * TMath::Sin(phi);
  (*DerivativeMatrix)(1, 2) = et * TMath::Cos(phi);
  (*DerivativeMatrix)(2, 2) = 0.;
  (*DerivativeMatrix)(3, 2) = 0.;

  return DerivativeMatrix;
}

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

protected

Definition at line 74 of file TFitParticleEtThetaPhi.cc.

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

Referenced by TFitParticleEtThetaPhi().

                                                                                    {
  _nPar = 3;
  setIni4Vec(pini);
  setCovMatrix(theCovMatrix);
}

void TFitParticleEtThetaPhi::setIni4Vec ( const TLorentzVector *  pini )

overridevirtual

Implements TAbsFitParticle.

Definition at line 106 of file TFitParticleEtThetaPhi.cc.

References TAbsFitParticle::_iniparameters, TAbsFitParticle::_nPar, TAbsFitParticle::_parameters, TAbsFitParticle::_pcurr, TAbsFitParticle::_pini, TAbsFitParticle::_u1, TAbsFitParticle::_u2, TAbsFitParticle::_u3, phi, funct::sin(), and theta().

Referenced by init().

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

  if (pini == nullptr) {
    _u1.SetXYZ(0., 0., 0.);
    _u3.SetXYZ(0., 0., 0.);
    _u2.SetXYZ(0., 0., 0.);
    _pini.SetXYZT(0., 0., 0., 0.);
    _pcurr = _pini;

    _iniparameters.ResizeTo(_nPar, 1);
    _iniparameters(0, 0) = 0.;
    _iniparameters(1, 0) = 0.;
    _iniparameters(2, 0) = 0.;

    _parameters.ResizeTo(_nPar, 1);
    _parameters(0, 0) = 0.;
    _parameters(1, 0) = 0.;
    _parameters(2, 0) = 0.;

  } else {
    Double_t et = pini->E() * std::fabs(sin(pini->Theta()));
    Double_t theta = pini->Theta();
    Double_t phi = pini->Phi();

    _pini = (*pini);
    _pcurr = _pini;

    _iniparameters.ResizeTo(_nPar, 1);
    _iniparameters(0, 0) = et;
    _iniparameters(1, 0) = theta;
    _iniparameters(2, 0) = phi;

    _parameters.ResizeTo(_nPar, 1);
    _parameters = _iniparameters;

    _u1.SetXYZ(TMath::Cos(phi), TMath::Sin(phi), 0.);  // the base vector of Et
    _u2.SetXYZ(TMath::Cos(phi) * TMath::Cos(theta),
               TMath::Sin(phi) * TMath::Cos(theta),
               -1. * TMath::Sin(theta));  // the base vector of Eta ( same as the base vector for Theta)
    _u3.SetXYZ(-1. * TMath::Sin(phi), TMath::Cos(phi), 0.);  // the base vector of Phi
  }
}

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

overridevirtual

Implements TAbsFitParticle.

Definition at line 186 of file TFitParticleEtThetaPhi.cc.

References TAbsFitParticle::_nPar, and funct::sin().

                                                                     {
  // Returns the parameters corresponding to the given
  // 4vector

  // retrieve parameters
  TMatrixD* tparams = new TMatrixD(_nPar, 1);
  (*tparams)(0, 0) = vec.E() * std::fabs(sin(vec.Theta()));
  (*tparams)(1, 0) = vec.Theta();
  (*tparams)(2, 0) = vec.Phi();

  return tparams;
}