StKinFitter Class Reference

#include <StKinFitter.h>

Inheritance diagram for StKinFitter:

Public Member Functions
StEvtSolution	addKinFitInfo (StEvtSolution *asol)
	StKinFitter ()
	StKinFitter (int jetParam, int lepParam, int metParam, int maxNrIter, double maxDeltaS, double maxF, std::vector< int > constraints)
	StKinFitter (Param jetParam, Param lepParam, Param metParam, int maxNrIter, double maxDeltaS, double maxF, std::vector< int > constraints)
	~StKinFitter ()
Public Member Functions inherited from TopKinFitter
int	fitNrIter () const
	return number of used iterations More...
double	fitProb () const
	return fit probability More...
double	fitS () const
	return chi2 of fit (not normalized to degrees of freedom) More...
void	setVerbosity (const int verbosityLevel)
	allows to change the verbosity of the TKinFitter More...
	TopKinFitter (const int maxNrIter=200, const double maxDeltaS=5e-5, const double maxF=1e-4, const double mW=80.4, const double mTop=173.)
	default constructor More...
	~TopKinFitter ()
	default destructor More...

Private Member Functions
void	setupFitter ()

Private Attributes
TFitConstraintM *	cons1_
TFitConstraintM *	cons2_
TFitConstraintM *	cons3_
std::vector< int >	constraints_
TAbsFitParticle *	fitBottom_
TAbsFitParticle *	fitLepton_
TAbsFitParticle *	fitLight_
TAbsFitParticle *	fitNeutrino_
Param	jetParam_
Param	lepParam_
Param	metParam_

Additional Inherited Members
Public Types inherited from TopKinFitter
enum	Param { kEMom, kEtEtaPhi, kEtThetaPhi }
	supported parameterizations More...
Protected Member Functions inherited from TopKinFitter
std::string	param (const Param &param) const
	convert Param to human readable form More...
Protected Attributes inherited from TopKinFitter
TKinFitter *	fitter_
	kinematic fitter More...
double	maxDeltaS_
	maximal allowed chi2 (not normalized to degrees of freedom) More...
double	maxF_
	maximal allowed distance from constraints More...
int	maxNrIter_
	maximal allowed number of iterations to be used for the fit More...
double	mTop_
	top mass value used for constraints More...
double	mW_
	W mass value used for constraints. More...

Detailed Description

Definition at line 20 of file StKinFitter.h.

Constructor & Destructor Documentation

StKinFitter::StKinFitter

(

)

Definition at line 28 of file StKinFitter.cc.

References setupFitter().

                         :
  TopKinFitter(),
  jetParam_(kEMom), 
  lepParam_(kEMom), 
  metParam_(kEMom)
{
  setupFitter();
}

StKinFitter::StKinFitter	(	int	jetParam,
		int	lepParam,
		int	metParam,
		int	maxNrIter,
		double	maxDeltaS,
		double	maxF,
		std::vector< int >	constraints
	)

Definition at line 37 of file StKinFitter.cc.

References setupFitter().

                                                                                       :
  TopKinFitter(maxNrIter, maxDeltaS, maxF),
  jetParam_((Param) jetParam), 
  lepParam_((Param) lepParam), 
  metParam_((Param) metParam),
  constraints_(constraints) 
{
  setupFitter();
}

StKinFitter::StKinFitter	(	Param	jetParam,
		Param	lepParam,
		Param	metParam,
		int	maxNrIter,
		double	maxDeltaS,
		double	maxF,
		std::vector< int >	constraints
	)

Definition at line 48 of file StKinFitter.cc.

References setupFitter().

                                                                                                   :
  TopKinFitter(maxNrIter, maxDeltaS, maxF),
  jetParam_(jetParam),
  lepParam_(lepParam),
  metParam_(metParam),
  constraints_(constraints) 
{
  setupFitter();
}

StKinFitter::~StKinFitter

(

)

Definition at line 59 of file StKinFitter.cc.

References cons1_, cons2_, cons3_, fitBottom_, fitLepton_, fitLight_, and fitNeutrino_.

{
  delete cons1_; delete cons2_; delete cons3_;
  delete fitBottom_; delete fitLight_; delete fitLepton_; delete fitNeutrino_;
}

Member Function Documentation

StEvtSolution StKinFitter::addKinFitInfo

(

StEvtSolution *

asol

)

Definition at line 65 of file StKinFitter.cc.

References reco::LeafCandidate::energy(), reco::LeafCandidate::et(), res::HelperElectron::eta(), res::HelperMuon::eta(), res::HelperJet::eta(), reco::LeafCandidate::eta(), eta(), TKinFitter::fit(), fitBottom_, fitLepton_, fitLight_, fitNeutrino_, TopKinFitter::fitProb(), TopKinFitter::fitter_, StEvtSolution::getBottom(), TAbsFitParticle::getCurr4Vec(), StEvtSolution::getDecay(), StEvtSolution::getElectron(), StEvtSolution::getLight(), StEvtSolution::getMuon(), StEvtSolution::getNeutrino(), TKinFitter::getStatus(), jetParam_, res::HelperJet::kB, TopKinFitter::kEMom, TopKinFitter::kEtEtaPhi, TopKinFitter::kEtThetaPhi, res::HelperJet::kUds, lepParam_, res::HelperMET::met(), CaloMET_cfi::met, metParam_, res::HelperElectron::phi(), res::HelperMuon::phi(), res::HelperJet::phi(), res::HelperMET::phi(), funct::pow(), res::HelperElectron::pt(), res::HelperMuon::pt(), res::HelperJet::pt(), reco::LeafCandidate::pt(), reco::LeafCandidate::px(), reco::LeafCandidate::py(), reco::LeafCandidate::pz(), StEvtSolution::setChi2Prob(), TAbsFitParticle::setCovMatrix(), StEvtSolution::setFitBottom(), StEvtSolution::setFitLepton(), StEvtSolution::setFitLight(), StEvtSolution::setFitNeutrino(), and TAbsFitParticle::setIni4Vec().

Referenced by StEvtSolutionMaker::produce().

{
  StEvtSolution fitsol(*asol);

  TMatrixD m1(3,3),  m2(3,3);
  TMatrixD m1b(4,4), m2b(4,4);
  TMatrixD m3(3,3),  m4(3,3);
  m1.Zero();  m2.Zero();
  m1b.Zero(); m2b.Zero();
  m3.Zero();  m4.Zero();
  
  TLorentzVector bottomVec(fitsol.getBottom().px(),fitsol.getBottom().py(),
                           fitsol.getBottom().pz(),fitsol.getBottom().energy());
  TLorentzVector lightVec(fitsol.getLight().px(),fitsol.getLight().py(),
                          fitsol.getLight().pz(),fitsol.getLight().energy());
  TLorentzVector leplVec;
  if(fitsol.getDecay()== "electron") leplVec = TLorentzVector(fitsol.getElectron().px(), fitsol.getElectron().py(),    
                                  fitsol.getElectron().pz(), fitsol.getElectron().energy());
  if(fitsol.getDecay()== "muon")     leplVec = TLorentzVector(fitsol.getMuon().px(), fitsol.getMuon().py(),    
                                  fitsol.getMuon().pz(), fitsol.getMuon().energy());
  TLorentzVector lepnVec(fitsol.getNeutrino().px(), fitsol.getNeutrino().py(),
             0, fitsol.getNeutrino().et());
    
  // jet resolutions
  {
    //FIXME this dirty hack needs a clean solution soon!
    double pt  = fitsol.getBottom().pt ();
    double eta = fitsol.getBottom().eta();
    res::HelperJet jetRes;
    if (jetParam_ == kEMom) {
      m1b(0,0) = pow(jetRes.pt (pt, eta, res::HelperJet::kB  ), 2);
      m1b(1,1) = pow(jetRes.pt (pt, eta, res::HelperJet::kB  ), 2);
      m1b(2,2) = pow(jetRes.pt (pt, eta, res::HelperJet::kB  ), 2);
      m1b(3,3) = pow(jetRes.pt (pt, eta, res::HelperJet::kB  ), 2);
      m2b(0,0) = pow(jetRes.pt (pt, eta, res::HelperJet::kUds), 2); 
      m2b(1,1) = pow(jetRes.pt (pt, eta, res::HelperJet::kUds), 2); 
      m2b(2,2) = pow(jetRes.pt (pt, eta, res::HelperJet::kUds), 2);
      m2b(3,3) = pow(jetRes.pt (pt, eta, res::HelperJet::kUds), 2);
    } else if (jetParam_ == kEtEtaPhi) {
      m1 (0,0) = pow(jetRes.pt (pt, eta, res::HelperJet::kB  ), 2);
      m1 (1,1) = pow(jetRes.eta(pt, eta, res::HelperJet::kB  ), 2);
      m1 (2,2) = pow(jetRes.phi(pt, eta, res::HelperJet::kB  ), 2);
      m2 (0,0) = pow(jetRes.pt (pt, eta, res::HelperJet::kUds), 2); 
      m2 (1,1) = pow(jetRes.eta(pt, eta, res::HelperJet::kUds), 2); 
      m2 (2,2) = pow(jetRes.phi(pt, eta, res::HelperJet::kUds), 2);
    } else if (jetParam_ == kEtThetaPhi) {
      m1 (0,0) = pow(jetRes.pt (pt, eta, res::HelperJet::kB  ), 2);
      m1 (1,1) = pow(jetRes.eta(pt, eta, res::HelperJet::kB  ), 2);
      m1 (2,2) = pow(jetRes.phi(pt, eta, res::HelperJet::kB  ), 2);
      m2 (0,0) = pow(jetRes.pt (pt, eta, res::HelperJet::kUds), 2); 
      m2 (1,1) = pow(jetRes.eta(pt, eta, res::HelperJet::kUds), 2); 
      m2 (2,2) = pow(jetRes.phi(pt, eta, res::HelperJet::kUds), 2);
    }
  }
  // lepton resolutions
  {
    //FIXME this dirty hack needs a clean solution soon!
    double pt  = fitsol.getElectron().pt ();
    double eta = fitsol.getElectron().eta();
    res::HelperMuon     muonRes;
    res::HelperElectron elecRes;
    if (lepParam_ == kEMom) {
      if(fitsol.getDecay()== "electron"){
    m3(0,0) = pow(elecRes.pt (pt, eta), 2);
    m3(1,1) = pow(elecRes.pt (pt, eta), 2); 
    m3(2,2) = pow(elecRes.pt (pt, eta), 2);
      }
      if(fitsol.getDecay()== "muon"){
    m3(0,0) = pow(muonRes.pt (pt, eta), 2);
    m3(1,1) = pow(muonRes.pt (pt, eta), 2); 
    m3(2,2) = pow(muonRes.pt (pt, eta), 2);
      }
    } else if (lepParam_ == kEtEtaPhi) {
      if(fitsol.getDecay()== "electron"){
    m3(0,0) = pow(elecRes.pt (pt, eta), 2);
    m3(1,1) = pow(elecRes.eta(pt, eta), 2); 
    m3(2,2) = pow(elecRes.phi(pt, eta), 2);
      }
      if(fitsol.getDecay()== "muon"){
    m3(0,0) = pow(muonRes.pt (pt, eta), 2);
    m3(1,1) = pow(muonRes.eta(pt, eta), 2); 
    m3(2,2) = pow(muonRes.phi(pt, eta), 2);
      }
    } else if (lepParam_ == kEtThetaPhi) {
      if(fitsol.getDecay()== "electron"){
    m3(0,0) = pow(elecRes.pt (pt, eta), 2);
    m3(1,1) = pow(elecRes.eta(pt, eta), 2); 
    m3(2,2) = pow(elecRes.phi(pt, eta), 2);
      }
      if(fitsol.getDecay()== "muon"){
    m3(0,0) = pow(muonRes.pt (pt, eta), 2);
    m3(1,1) = pow(muonRes.eta(pt, eta), 2); 
    m3(2,2) = pow(muonRes.phi(pt, eta), 2);
      }
    }
  }
  // neutrino resolutions
  {
    //FIXME this dirty hack needs a clean solution soon!
    double met = fitsol.getNeutrino().pt();
    res::HelperMET metRes;
    if (metParam_ == kEMom) {
      m4(0,0) = pow(metRes.met(met), 2);
      m4(1,1) = pow(         9999.,  2);
      m4(2,2) = pow(metRes.met(met), 2);
    } else if (metParam_ == kEtEtaPhi) {
      m4(0,0) = pow(metRes.met(met), 2);
      m4(1,1) = pow(         9999.,  2);
      m4(2,2) = pow(metRes.phi(met), 2);
    } else if (metParam_ == kEtThetaPhi) {
      m4(0,0) = pow(metRes.met(met), 2);
      m4(1,1) = pow(         9999.,  2);
      m4(2,2) = pow(metRes.phi(met), 2);
    }
  }
  // set the kinematics of the objects to be fitted
  fitBottom_->setIni4Vec(&bottomVec);
  fitLight_->setIni4Vec(&lightVec);
  fitLepton_->setIni4Vec(&leplVec);
  fitNeutrino_->setIni4Vec(&lepnVec);
  if (jetParam_ == kEMom) {
    fitBottom_->setCovMatrix(&m1b);
    fitLight_->setCovMatrix(&m2b);
  } else {
    fitBottom_->setCovMatrix(&m1);
    fitLight_->setCovMatrix(&m2);
  }
  fitLepton_->setCovMatrix(&m3);
  fitNeutrino_->setCovMatrix(&m4);

  // perform the fit!
  fitter_->fit();
  
  // add fitted information to the solution
  if (fitter_->getStatus() == 0) {
    // read back the jet kinematics and resolutions
    pat::Particle aFitBottom(reco::LeafCandidate(0, math::XYZTLorentzVector(fitBottom_->getCurr4Vec()->X(), fitBottom_->getCurr4Vec()->Y(), fitBottom_->getCurr4Vec()->Z(), fitBottom_->getCurr4Vec()->E()),math::XYZPoint()));
    pat::Particle aFitLight(reco::LeafCandidate(0, math::XYZTLorentzVector(fitLight_->getCurr4Vec()->X(), fitLight_->getCurr4Vec()->Y(), fitLight_->getCurr4Vec()->Z(), fitLight_->getCurr4Vec()->E()),math::XYZPoint()));

    // read back the lepton kinematics and resolutions
    pat::Particle aFitLepton(reco::LeafCandidate(0, math::XYZTLorentzVector(fitLepton_->getCurr4Vec()->X(), fitLepton_->getCurr4Vec()->Y(), fitLepton_->getCurr4Vec()->Z(), fitLepton_->getCurr4Vec()->E()), math::XYZPoint()));

    // read back the MET kinematics and resolutions
    pat::Particle aFitNeutrino(reco::LeafCandidate(0, math::XYZTLorentzVector(fitNeutrino_->getCurr4Vec()->X(), fitNeutrino_->getCurr4Vec()->Y(), fitNeutrino_->getCurr4Vec()->Z(), fitNeutrino_->getCurr4Vec()->E()), math::XYZPoint()));   
    
    // finally fill the fitted particles
    fitsol.setFitBottom(aFitBottom);
    fitsol.setFitLight(aFitLight);
    fitsol.setFitLepton(aFitLepton);
    fitsol.setFitNeutrino(aFitNeutrino);

    // store the fit's chi2 probability
    fitsol.setChi2Prob( fitProb() );
  }

  return fitsol;

}

void StKinFitter::setupFitter ( )

private

Definition at line 227 of file StKinFitter.cc.

References TKinFitter::addConstraint(), TKinFitter::addMeasParticle(), TFitConstraintM::addParticle1(), TFitConstraintM::addParticles1(), cons1_, cons2_, cons3_, constraints_, gather_cfg::cout, fitBottom_, fitLepton_, fitLight_, fitNeutrino_, TopKinFitter::fitter_, i, jetParam_, TopKinFitter::kEMom, TopKinFitter::kEtEtaPhi, TopKinFitter::kEtThetaPhi, lepParam_, TopKinFitter::maxDeltaS_, TopKinFitter::maxF_, TopKinFitter::maxNrIter_, metParam_, TopKinFitter::mTop_, TopKinFitter::mW_, and TopKinFitter::param().

Referenced by StKinFitter().

                              {
  
  // FIXME: replace by messagelogger!!!
  
  std::cout<<std::endl<<std::endl<<"+++++++++++ KINFIT SETUP ++++++++++++"<<std::endl;
  std::cout<<"  jet parametrisation:     " << param(jetParam_) << std::endl;
  std::cout<<"  lepton parametrisation:  " << param(lepParam_) << std::endl;
  std::cout<<"  met parametrisation:     " << param(metParam_) << std::endl;
  std::cout<<"  constraints:  "<<std::endl;
  for(unsigned int i=0; i<constraints_.size(); i++){
    if(constraints_[i] == 1) std::cout<<"    - hadronic W-mass"<<std::endl;
    if(constraints_[i] == 2) std::cout<<"    - leptonic W-mass"<<std::endl;
    if(constraints_[i] == 3) std::cout<<"    - hadronic top mass"<<std::endl;
    if(constraints_[i] == 4) std::cout<<"    - leptonic top mass"<<std::endl;
    if(constraints_[i] == 5) std::cout<<"    - neutrino mass"<<std::endl;
  }
  std::cout<<"Max. number of iterations: "<<maxNrIter_<<std::endl;
  std::cout<<"Max. deltaS: "<<maxDeltaS_<<std::endl;
  std::cout<<"Max. F: "<<maxF_<<std::endl;
  std::cout<<"++++++++++++++++++++++++++++++++++++++++++++"<<std::endl<<std::endl<<std::endl;

  TMatrixD empty3(3,3); TMatrixD empty4(4,4);
  if (jetParam_ == kEMom) {
    fitBottom_ = new TFitParticleEMomDev("Jet1", "Jet1", 0, &empty4);
    fitLight_  = new TFitParticleEMomDev("Jet2", "Jet2", 0, &empty4);
  } else if (jetParam_ == kEtEtaPhi) {
    fitBottom_ = new TFitParticleEtEtaPhi("Jet1", "Jet1", 0, &empty3);
    fitLight_  = new TFitParticleEtEtaPhi("Jet2", "Jet2", 0, &empty3);
  } else if (jetParam_ == kEtThetaPhi) {
    fitBottom_ = new TFitParticleEtThetaPhi("Jet1", "Jet1", 0, &empty3);
    fitLight_  = new TFitParticleEtThetaPhi("Jet2", "Jet2", 0, &empty3);
  }
  if (lepParam_ == kEMom) {
    fitLepton_ = new TFitParticleEScaledMomDev("Lepton", "Lepton", 0, &empty3);
  } else if (lepParam_ == kEtEtaPhi) {
    fitLepton_ = new TFitParticleEtEtaPhi("Lepton", "Lepton", 0, &empty3);
  } else if (lepParam_ == kEtThetaPhi) {
    fitLepton_ = new TFitParticleEtThetaPhi("Lepton", "Lepton", 0, &empty3);
  }
  if (metParam_ == kEMom) {
    fitNeutrino_ = new TFitParticleEScaledMomDev("Neutrino", "Neutrino", 0, &empty3);
  } else if (metParam_ == kEtEtaPhi) {
    fitNeutrino_ = new TFitParticleEtEtaPhi("Neutrino", "Neutrino", 0, &empty3);
  } else if (metParam_ == kEtThetaPhi) {
    fitNeutrino_ = new TFitParticleEtThetaPhi("Neutrino", "Neutrino", 0, &empty3);
  }

  cons1_ = new TFitConstraintM("MassConstraint", "Mass-Constraint", 0, 0 , mW_);
  cons1_->addParticles1(fitLepton_, fitNeutrino_);
  cons2_ = new TFitConstraintM("MassConstraint", "Mass-Constraint", 0, 0, mTop_);
  cons2_->addParticles1(fitLepton_, fitNeutrino_, fitBottom_);
  cons3_ = new TFitConstraintM("MassConstraint", "Mass-Constraint", 0, 0, 0.);
  cons3_->addParticle1(fitNeutrino_);

  for (unsigned int i=0; i<constraints_.size(); i++) {
    if (constraints_[i] == 1) fitter_->addConstraint(cons1_);
    if (constraints_[i] == 2) fitter_->addConstraint(cons2_);
    if (constraints_[i] == 3) fitter_->addConstraint(cons3_);
  }
  fitter_->addMeasParticle(fitBottom_);
  fitter_->addMeasParticle(fitLight_);
  fitter_->addMeasParticle(fitLepton_);
  fitter_->addMeasParticle(fitNeutrino_);
  
}

Member Data Documentation

TFitConstraintM* StKinFitter::cons1_

private

Definition at line 43 of file StKinFitter.h.

Referenced by setupFitter(), and ~StKinFitter().

TFitConstraintM* StKinFitter::cons2_

private

Definition at line 44 of file StKinFitter.h.

Referenced by setupFitter(), and ~StKinFitter().

TFitConstraintM* StKinFitter::cons3_

private

Definition at line 45 of file StKinFitter.h.

Referenced by setupFitter(), and ~StKinFitter().

std::vector<int> StKinFitter::constraints_

private

Definition at line 48 of file StKinFitter.h.

Referenced by setupFitter().

TAbsFitParticle* StKinFitter::fitBottom_

private

Definition at line 38 of file StKinFitter.h.

Referenced by addKinFitInfo(), setupFitter(), and ~StKinFitter().

TAbsFitParticle* StKinFitter::fitLepton_

private

Definition at line 40 of file StKinFitter.h.

Referenced by addKinFitInfo(), setupFitter(), and ~StKinFitter().

TAbsFitParticle* StKinFitter::fitLight_

private

Definition at line 39 of file StKinFitter.h.

Referenced by addKinFitInfo(), setupFitter(), and ~StKinFitter().

TAbsFitParticle* StKinFitter::fitNeutrino_

private

Definition at line 41 of file StKinFitter.h.

Referenced by addKinFitInfo(), setupFitter(), and ~StKinFitter().

Param StKinFitter::jetParam_

private

Definition at line 47 of file StKinFitter.h.

Referenced by addKinFitInfo(), and setupFitter().

Param StKinFitter::lepParam_

private

Definition at line 47 of file StKinFitter.h.

Referenced by addKinFitInfo(), and setupFitter().

Param StKinFitter::metParam_

private

Definition at line 47 of file StKinFitter.h.

Referenced by addKinFitInfo(), and setupFitter().