tauImpactParameter::TauA1NuConstrainedFitter Class Reference

#include <TauA1NuConstrainedFitter.h>

Inheritance diagram for tauImpactParameter::TauA1NuConstrainedFitter:

Public Types
enum	ExpandedPars { a1_vx = 9, a1_vy, a1_vz, nexpandedpar }
enum	OrignialPars { norigpar = 13 }
enum	Pars {   tau_phi = 0, tau_theta, a1_px, a1_py,   a1_pz, a1_m, nu_px, nu_py,   nu_pz, npar }
Public Types inherited from tauImpactParameter::MultiProngTauSolver
enum	Ambiguity { zero, minus, plus, NAmbiguity }

Public Member Functions
bool	fit ()
LorentzVectorParticle	getMother ()
std::vector < LorentzVectorParticle >	getRefitDaughters ()
double	getTauRotationSignificance ()
	TauA1NuConstrainedFitter (unsigned int ambiguity, const LorentzVectorParticle &A1, const TVector3 &PVertex, const TMatrixTSym< double > &VertexCov)
	~TauA1NuConstrainedFitter () override
Public Member Functions inherited from tauImpactParameter::MultiProngTauSolver
	MultiProngTauSolver ()
virtual	~MultiProngTauSolver ()

Private Member Functions
void	UpdateExpandedPar ()

Static Private Member Functions
static TVectorT< double >	ComputeA1LorentzVectorPar (const TVectorT< double > &inpar)
static TVectorT< double >	ComputeExpParToPar (const TVectorT< double > &inpar)
static TVectorT< double >	ComputeInitalExpPar (const TVectorT< double > &inpar)
static TVectorT< double >	ComputeMotherLorentzVectorPar (const TVectorT< double > &inpar)
static TVectorT< double >	ComputeNuLorentzVectorPar (const TVectorT< double > &inpar)
static void	CovertParToObjects (const TVectorD &v, TLorentzVector &a1, TLorentzVector &nu, double &phi, double &theta, TVector3 &TauDir)
static TVectorT< double >	SolveAmbiguityAnalytically (const TVectorT< double > &inpar, unsigned int ambiguity)
static TVectorT< double >	SolveAmbiguityAnalyticallywithRot (const TVectorT< double > &inpar, unsigned int ambiguity)
static TVectorT< double >	TauRot (const TVectorT< double > &inpar)

Private Attributes
unsigned int	ambiguity_
TMatrixTSym< double >	cov
TMatrixTSym< double >	cov_0
TMatrixTSym< double >	expcov
TVectorT< double >	exppar
TVectorT< double >	par
TVectorT< double >	par_0
std::vector < LorentzVectorParticle >	particles_

Additional Inherited Members
Static Public Member Functions inherited from tauImpactParameter::MultiProngTauSolver
static void	analyticESolver (TLorentzVector &nu_plus, TLorentzVector &nu_minus, const TLorentzVector &A1, bool &isReal)
static LorentzVectorParticle	estimateNu (const LorentzVectorParticle &a1, const TVector3 &pv, int ambiguity, TLorentzVector &tau)
static void	numericalESolver (TLorentzVector &nu_plus, TLorentzVector &nu_minus, const TLorentzVector &A1, bool &isReal)
static void	quadratic (double &x_plus, double &x_minus, double a, double b, double c, bool &isReal)
static TVectorT< double >	rotateToTauFrame (const TVectorT< double > &inpar)
static bool	setTauDirectionatThetaGJMax (const TLorentzVector &a1, double &theta, double &phi, double scale=1.0)
static void	solveByRotation (const TVector3 &TauDir, const TLorentzVector &A1, TLorentzVector &Tau_plus, TLorentzVector &Tau_minus, TLorentzVector &nu_plus, TLorentzVector &nu_minus, bool &isReal, bool rotateback=true)
static double	thetaGJMax (const TLorentzVector &a1)

Detailed Description

Definition at line 21 of file TauA1NuConstrainedFitter.h.

Member Enumeration Documentation

enum tauImpactParameter::TauA1NuConstrainedFitter::ExpandedPars

Enumerator
a1_vx
a1_vy
a1_vz
nexpandedpar

Definition at line 30 of file TauA1NuConstrainedFitter.h.

{ a1_vx = 9, a1_vy, a1_vz, nexpandedpar };

enum tauImpactParameter::TauA1NuConstrainedFitter::OrignialPars

Enumerator
norigpar

Definition at line 31 of file TauA1NuConstrainedFitter.h.

{ norigpar = 13 };

enum tauImpactParameter::TauA1NuConstrainedFitter::Pars

Enumerator
tau_phi
tau_theta
a1_px
a1_py
a1_pz
a1_m
nu_px
nu_py
nu_pz
npar

Definition at line 29 of file TauA1NuConstrainedFitter.h.

{ tau_phi = 0, tau_theta, a1_px, a1_py, a1_pz, a1_m, nu_px, nu_py, nu_pz, npar };

Constructor & Destructor Documentation

TauA1NuConstrainedFitter::TauA1NuConstrainedFitter	(	unsigned int	ambiguity,
		const LorentzVectorParticle &	A1,
		const TVector3 &	PVertex,
		const TMatrixTSym< double > &	VertexCov
	)

Definition at line 15 of file TauA1NuConstrainedFitter.cc.

References tauImpactParameter::Particle::bField(), ComputeExpParToPar(), ComputeInitalExpPar(), cov, cov_0, tauImpactParameter::Particle::covariance(), expcov, exppar, mps_fire::i, dqmiolumiharvest::j, nexpandedpar, tauImpactParameter::LorentzVectorParticle::NLorentzandVertexPar, npar, TtFullLepDaughter::Nu, tauImpactParameter::PDGInfo::nu_tau, tauImpactParameter::LorentzVectorParticle::NVertex, par, par_0, tauImpactParameter::LorentzVectorParticle::parameter(), particles_, tauImpactParameter::ErrorMatrixPropagator::propagateError(), findQualityFiles::size, HLT_FULL_cff::Tau, tauImpactParameter::LorentzVectorParticle::vx, tauImpactParameter::LorentzVectorParticle::vy, and tauImpactParameter::LorentzVectorParticle::vz.

    : MultiProngTauSolver(), ambiguity_(ambiguity) {
  TLorentzVector Tau(0, 0, 0, 0);
  //dummy substitution not used later
  TVectorT<double> nu_par(LorentzVectorParticle::NLorentzandVertexPar, 1);
  TMatrixTSym<double> nu_cov(LorentzVectorParticle::NLorentzandVertexPar);
  LorentzVectorParticle Nu(nu_par, nu_cov, PDGInfo::nu_tau, 0.0, A1.bField());
  particles_.push_back(A1);
  particles_.push_back(Nu);

  // setup 13 by 13 matrix
  int size = LorentzVectorParticle::NVertex + particles_.size() * LorentzVectorParticle::NLorentzandVertexPar;
  TVectorT<double> inpar(size);
  TMatrixTSym<double> incov(size);

  // Get primary vertex information
  if (VertexCov.GetNrows() != LorentzVectorParticle::NVertex)
    return;
  inpar(LorentzVectorParticle::vx) = PVertex.X();
  inpar(LorentzVectorParticle::vy) = PVertex.Y();
  inpar(LorentzVectorParticle::vz) = PVertex.Z();
  for (int i = 0; i < LorentzVectorParticle::NVertex; i++) {
    for (int j = 0; j < LorentzVectorParticle::NVertex; j++)
      incov(i, j) = VertexCov(i, j);
  }
  int A1offset = LorentzVectorParticle::NVertex;
  int Nuoffset = LorentzVectorParticle::NLorentzandVertexPar + LorentzVectorParticle::NVertex;
  for (int i = 0; i < LorentzVectorParticle::NLorentzandVertexPar; i++) {
    inpar(i + A1offset) = A1.parameter(i);
    inpar(i + Nuoffset) = Nu.parameter(i) + 1.0;  // offset by 1 GeV to prevent convergence on first iteration
    for (int j = 0; j < LorentzVectorParticle::NLorentzandVertexPar; j++) {
      incov(i + A1offset, j + A1offset) = A1.covariance(i, j);
      incov(i + Nuoffset, j + Nuoffset) = Nu.covariance(i, j);
    }
  }

  exppar.ResizeTo(nexpandedpar, 1);
  exppar = ComputeInitalExpPar(inpar);
  expcov.ResizeTo(nexpandedpar, nexpandedpar);
  expcov = ErrorMatrixPropagator::propagateError(&TauA1NuConstrainedFitter::ComputeInitalExpPar, inpar, incov);

  TVectorT<double> PAR_0(npar);
  par_0.ResizeTo(npar);
  cov_0.ResizeTo(npar, npar);
  PAR_0 = ComputeExpParToPar(exppar);
  for (int i = 0; i < npar; i++)
    par_0(i) = PAR_0(i);
  cov_0 = ErrorMatrixPropagator::propagateError(&TauA1NuConstrainedFitter::ComputeExpParToPar, exppar, expcov);

  for (int i = 0; i < npar; i++) {
    for (int j = 0; j < npar; j++) {
      cov_0(i, j) = expcov(i, j);
    }
  }

  par.ResizeTo(npar);
  par = par_0;
  cov.ResizeTo(npar, npar);
  cov = cov_0;
}

tauImpactParameter::TauA1NuConstrainedFitter::~TauA1NuConstrainedFitter ( )

inlineoverride

Definition at line 27 of file TauA1NuConstrainedFitter.h.

{};

Member Function Documentation

TVectorT< double > TauA1NuConstrainedFitter::ComputeA1LorentzVectorPar ( const TVectorT< double > &  inpar )

staticprivate

Definition at line 123 of file TauA1NuConstrainedFitter.cc.

References a1_m, a1_px, a1_py, a1_pz, a1_vx, a1_vy, a1_vz, tauImpactParameter::LorentzVectorParticle::m, tauImpactParameter::LorentzVectorParticle::NLorentzandVertexPar, tauImpactParameter::LorentzVectorParticle::px, tauImpactParameter::LorentzVectorParticle::py, tauImpactParameter::LorentzVectorParticle::pz, tauImpactParameter::LorentzVectorParticle::vx, tauImpactParameter::LorentzVectorParticle::vy, and tauImpactParameter::LorentzVectorParticle::vz.

Referenced by ComputeMotherLorentzVectorPar(), and getRefitDaughters().

                                                                                                  {
  TVectorT<double> outpar(LorentzVectorParticle::NLorentzandVertexPar);
  outpar(LorentzVectorParticle::vx) = inpar(a1_vx);
  outpar(LorentzVectorParticle::vy) = inpar(a1_vy);
  outpar(LorentzVectorParticle::vz) = inpar(a1_vz);
  outpar(LorentzVectorParticle::px) = inpar(a1_px);
  outpar(LorentzVectorParticle::py) = inpar(a1_py);
  outpar(LorentzVectorParticle::pz) = inpar(a1_pz);
  outpar(LorentzVectorParticle::m) = inpar(a1_m);
  return outpar;
}

TVectorT< double > TauA1NuConstrainedFitter::ComputeExpParToPar ( const TVectorT< double > &  inpar )

staticprivate

Definition at line 103 of file TauA1NuConstrainedFitter.cc.

References mps_fire::i, and npar.

Referenced by TauA1NuConstrainedFitter().

                                                                                           {
  TVectorT<double> outpar(npar);
  for (int i = 0; i < npar; i++) {
    outpar(i) = inpar(i);
  }
  return outpar;
}

TVectorT< double > TauA1NuConstrainedFitter::ComputeInitalExpPar ( const TVectorT< double > &  inpar )

staticprivate

Definition at line 79 of file TauA1NuConstrainedFitter.cc.

References a1_m, a1_px, a1_py, a1_pz, a1_vx, a1_vy, a1_vz, tauImpactParameter::LorentzVectorParticle::m, nexpandedpar, tauImpactParameter::LorentzVectorParticle::NLorentzandVertexPar, nu_px, nu_py, nu_pz, tauImpactParameter::LorentzVectorParticle::NVertex, hltrates_dqm_sourceclient-live_cfg::offset, MetAnalyzer::pv(), tauImpactParameter::LorentzVectorParticle::px, tauImpactParameter::LorentzVectorParticle::py, tauImpactParameter::LorentzVectorParticle::pz, tau_phi, tau_theta, tauImpactParameter::LorentzVectorParticle::vx, tauImpactParameter::LorentzVectorParticle::vy, and tauImpactParameter::LorentzVectorParticle::vz.

Referenced by TauA1NuConstrainedFitter().

                                                                                            {
  TVectorT<double> outpar(nexpandedpar);
  int offset = LorentzVectorParticle::NVertex;  // for A1
  TVector3 pv(inpar(LorentzVectorParticle::vx), inpar(LorentzVectorParticle::vy), inpar(LorentzVectorParticle::vz));
  TVector3 sv(inpar(LorentzVectorParticle::vx + offset),
              inpar(LorentzVectorParticle::vy + offset),
              inpar(LorentzVectorParticle::vz + offset));
  TVector3 TauDir = sv - pv;
  outpar(tau_phi) = TauDir.Phi();
  outpar(tau_theta) = TauDir.Theta();
  outpar(a1_px) = inpar(LorentzVectorParticle::px + offset);
  outpar(a1_py) = inpar(LorentzVectorParticle::py + offset);
  outpar(a1_pz) = inpar(LorentzVectorParticle::pz + offset);
  outpar(a1_m) = inpar(LorentzVectorParticle::m + offset);
  outpar(a1_vx) = inpar(LorentzVectorParticle::vx + offset);
  outpar(a1_vy) = inpar(LorentzVectorParticle::vy + offset);
  outpar(a1_vz) = inpar(LorentzVectorParticle::vz + offset);
  offset += LorentzVectorParticle::NLorentzandVertexPar;  // for Nu
  outpar(nu_px) = inpar(LorentzVectorParticle::px + offset);
  outpar(nu_py) = inpar(LorentzVectorParticle::py + offset);
  outpar(nu_pz) = inpar(LorentzVectorParticle::pz + offset);
  return outpar;
}

TVectorT< double > TauA1NuConstrainedFitter::ComputeMotherLorentzVectorPar ( const TVectorT< double > &  inpar )

staticprivate

Definition at line 135 of file TauA1NuConstrainedFitter.cc.

References a1_m, a1_px, a1_py, a1_pz, ComputeA1LorentzVectorPar(), ComputeNuLorentzVectorPar(), mps_fire::i, tauImpactParameter::LorentzVectorParticle::m, tauImpactParameter::LorentzVectorParticle::NLorentzandVertexPar, nu_px, nu_py, nu_pz, tauImpactParameter::LorentzVectorParticle::NVertex, tauImpactParameter::LorentzVectorParticle::px, tauImpactParameter::LorentzVectorParticle::py, tauImpactParameter::LorentzVectorParticle::pz, and mathSSE::sqrt().

Referenced by getMother().

                                                                                                      {
  TVectorT<double> outpar(LorentzVectorParticle::NLorentzandVertexPar);
  TVectorT<double> nupar = ComputeNuLorentzVectorPar(inpar);
  TVectorT<double> a1par = ComputeA1LorentzVectorPar(inpar);
  for (int i = 0; i < LorentzVectorParticle::NLorentzandVertexPar; i++) {
    if (i < LorentzVectorParticle::NVertex) {
      outpar(i) = a1par(i);
    } else {
      outpar(i) = nupar(i) + a1par(i);
    }
    //if(i==LorentzVectorParticle::m) outpar(i,0)=PDGInfo::tau_mass();
  }
  double nu_px = nupar(LorentzVectorParticle::px);
  double nu_py = nupar(LorentzVectorParticle::py);
  double nu_pz = nupar(LorentzVectorParticle::pz);
  double Enu2 = nu_px * nu_px + nu_py * nu_py + nu_pz * nu_pz;
  double a1_px = a1par(LorentzVectorParticle::px);
  double a1_py = a1par(LorentzVectorParticle::py);
  double a1_pz = a1par(LorentzVectorParticle::pz);
  double a1_m = a1par(LorentzVectorParticle::m);
  double Ea12 = a1_px * a1_px + a1_py * a1_py + a1_pz * a1_pz + a1_m * a1_m;
  double outpar_px = outpar(LorentzVectorParticle::px);
  double outpar_py = outpar(LorentzVectorParticle::py);
  double outpar_pz = outpar(LorentzVectorParticle::pz);
  double P2 = outpar_px * outpar_px + outpar_py * outpar_py + outpar_pz * outpar_pz;
  outpar(LorentzVectorParticle::m) = sqrt(std::fabs(Enu2 + Ea12 + 2 * sqrt(Enu2 * Ea12) - P2));
  return outpar;
}

TVectorT< double > TauA1NuConstrainedFitter::ComputeNuLorentzVectorPar ( const TVectorT< double > &  inpar )

staticprivate

Definition at line 111 of file TauA1NuConstrainedFitter.cc.

References a1_vx, a1_vy, a1_vz, tauImpactParameter::LorentzVectorParticle::m, tauImpactParameter::LorentzVectorParticle::NLorentzandVertexPar, nu_px, nu_py, nu_pz, tauImpactParameter::LorentzVectorParticle::px, tauImpactParameter::LorentzVectorParticle::py, tauImpactParameter::LorentzVectorParticle::pz, tauImpactParameter::LorentzVectorParticle::vx, tauImpactParameter::LorentzVectorParticle::vy, and tauImpactParameter::LorentzVectorParticle::vz.

Referenced by ComputeMotherLorentzVectorPar(), and getRefitDaughters().

                                                                                                  {
  TVectorT<double> outpar(LorentzVectorParticle::NLorentzandVertexPar);
  outpar(LorentzVectorParticle::vx) = inpar(a1_vx);
  outpar(LorentzVectorParticle::vy) = inpar(a1_vy);
  outpar(LorentzVectorParticle::vz) = inpar(a1_vz);
  outpar(LorentzVectorParticle::px) = inpar(nu_px);
  outpar(LorentzVectorParticle::py) = inpar(nu_py);
  outpar(LorentzVectorParticle::pz) = inpar(nu_pz);
  outpar(LorentzVectorParticle::m) = 0;
  return outpar;
}

void TauA1NuConstrainedFitter::CovertParToObjects ( const TVectorD &  v, TLorentzVector &  a1, TLorentzVector &  nu, double &  phi, double &  theta, TVector3 &  TauDir  )

staticprivate

Definition at line 209 of file TauA1NuConstrainedFitter.cc.

References a1_m, a1_px, a1_py, a1_pz, nu_px, nu_py, nu_pz, mathSSE::sqrt(), tau_phi, tau_theta, and findQualityFiles::v.

Referenced by SolveAmbiguityAnalytically(), SolveAmbiguityAnalyticallywithRot(), and TauRot().

                                                                                                             {
  a1 = TLorentzVector(v(a1_px),
                      v(a1_py),
                      v(a1_pz),
                      sqrt(v(a1_m) * v(a1_m) + v(a1_px) * v(a1_px) + v(a1_py) * v(a1_py) + v(a1_pz) * v(a1_pz)));
  nu = TLorentzVector(
      v(nu_px), v(nu_py), v(nu_pz), sqrt(v(nu_px) * v(nu_px) + v(nu_py) * v(nu_py) + v(nu_pz) * v(nu_pz)));
  phi = v(tau_phi);
  theta = v(tau_theta);
  TauDir.SetMagThetaPhi(1.0, theta, phi);
}

bool TauA1NuConstrainedFitter::fit

(

void

)

Definition at line 222 of file TauA1NuConstrainedFitter.cc.

References isotrackTrainRegressor::a1, a1_m, a1_px, a1_py, a1_pz, ambiguity_, funct::cos(), cov, cov_0, mps_fire::i, tauImpactParameter::MultiProngTauSolver::minus, npar, par, tauImpactParameter::MultiProngTauSolver::plus, tauImpactParameter::ErrorMatrixPropagator::propagateError(), funct::sin(), SolveAmbiguityAnalytically(), SolveAmbiguityAnalyticallywithRot(), tauImpactParameter::MultiProngTauSolver::solveByRotation(), mathSSE::sqrt(), tau_phi, tau_theta, theta(), and tauImpactParameter::MultiProngTauSolver::zero.

Referenced by trackingPlots.Iteration::modules(), and PFTau3ProngReco::produce().

                                   {
  // Check if Tau Direction is unphysical and if nessicary set the starting point to Theta_{GJ-Max}
  TLorentzVector a1(
      par(a1_px),
      par(a1_py),
      par(a1_pz),
      sqrt(par(a1_m) * par(a1_m) + par(a1_px) * par(a1_px) + par(a1_py) * par(a1_py) + par(a1_pz) * par(a1_pz)));
  double phi(par(tau_phi)), theta(par(tau_theta));
  TLorentzVector Tau_plus, Tau_minus, nu_plus, nu_minus;
  TVector3 TauDir(cos(phi) * sin(theta), sin(phi) * sin(theta), cos(theta));
  bool isReal;
  solveByRotation(TauDir, a1, Tau_plus, Tau_minus, nu_plus, nu_minus, isReal);

  //check that the do product of the a1 and tau is positive, otherwise there is no information for tau direction -> use zero solution
  if (TauDir.Dot(a1.Vect()) < 0) {
    isReal = false;
  }

  //case 1: is real then solve analytically
  if (isReal && (ambiguity_ == plus || ambiguity_ == minus)) {
    // popogate errors
    TVectorT<double> par_tmp = TauA1NuConstrainedFitter::SolveAmbiguityAnalytically(par, ambiguity_);
    cov = ErrorMatrixPropagator::propagateError(
        std::bind(TauA1NuConstrainedFitter::SolveAmbiguityAnalytically, std::placeholders::_1, ambiguity_), par, cov_0);
    for (int i = 0; i < npar; i++)
      par(i) = par_tmp(i);
    return true;
  }
  // case 2 is in unphsyical region - rotate and substitue \theta_{GJ} with \theta_{GJ}^{Max} and then solve analytically
  else if (!isReal && ambiguity_ == zero) {
    TVectorT<double> par_tmp = TauA1NuConstrainedFitter::SolveAmbiguityAnalyticallywithRot(par, ambiguity_);
    cov = ErrorMatrixPropagator::propagateError(
        std::bind(TauA1NuConstrainedFitter::SolveAmbiguityAnalyticallywithRot, std::placeholders::_1, ambiguity_),
        par,
        cov_0);
    for (int i = 0; i < npar; i++)
      par(i) = par_tmp(i);
    return true;
  }
  return false;
}

LorentzVectorParticle TauA1NuConstrainedFitter::getMother

(

)

Definition at line 195 of file TauA1NuConstrainedFitter.cc.

References funct::abs(), b, c, ComputeMotherLorentzVectorPar(), expcov, exppar, mps_fire::i, visualization-live-secondInstance_cfg::m, particles_, tauImpactParameter::ErrorMatrixPropagator::propagateError(), tauImpactParameter::PDGInfo::tau_minus, and UpdateExpandedPar().

Referenced by PFTau3ProngReco::produce().

                                                          {
  UpdateExpandedPar();
  double c(0), b(0);
  for (unsigned int i = 0; i < particles_.size(); i++) {
    c += particles_[i].charge();
    b = particles_[i].bField();
  }
  TVectorT<double> m = ComputeMotherLorentzVectorPar(exppar);
  TMatrixTSym<double> mcov =
      ErrorMatrixPropagator::propagateError(&TauA1NuConstrainedFitter::ComputeMotherLorentzVectorPar, exppar, expcov);
  LorentzVectorParticle mymother = LorentzVectorParticle(m, mcov, (int)(-1.0 * std::abs(PDGInfo::tau_minus) * c), c, b);
  return mymother;
}

std::vector< LorentzVectorParticle > TauA1NuConstrainedFitter::getRefitDaughters

(

)

Definition at line 176 of file TauA1NuConstrainedFitter.cc.

References isotrackTrainRegressor::a1, b, c, ComputeA1LorentzVectorPar(), ComputeNuLorentzVectorPar(), expcov, exppar, mps_fire::i, tauImpactParameter::PDGInfo::nu_tau, particles_, tauImpactParameter::ErrorMatrixPropagator::propagateError(), and UpdateExpandedPar().

Referenced by PFTau3ProngReco::produce().

                                                                             {
  std::vector<LorentzVectorParticle> refitParticles;
  UpdateExpandedPar();
  double c(0), b(0);
  for (unsigned int i = 0; i < particles_.size(); i++) {
    c += particles_[i].charge();
    b = particles_[i].bField();
  }
  TVectorT<double> a1 = ComputeA1LorentzVectorPar(exppar);
  TMatrixTSym<double> a1cov =
      ErrorMatrixPropagator::propagateError(&TauA1NuConstrainedFitter::ComputeA1LorentzVectorPar, exppar, expcov);
  refitParticles.push_back(LorentzVectorParticle(a1, a1cov, particles_[0].pdgId(), c, b));
  TVectorT<double> nu = ComputeNuLorentzVectorPar(exppar);
  TMatrixTSym<double> nucov =
      ErrorMatrixPropagator::propagateError(&TauA1NuConstrainedFitter::ComputeNuLorentzVectorPar, exppar, expcov);
  refitParticles.push_back(LorentzVectorParticle(nu, nucov, PDGInfo::nu_tau, 0.0, b));
  return refitParticles;
}

double TauA1NuConstrainedFitter::getTauRotationSignificance

(

)

Definition at line 313 of file TauA1NuConstrainedFitter.cc.

References cov_0, par, tauImpactParameter::ErrorMatrixPropagator::propagateError(), mathSSE::sqrt(), and TauRot().

                                                            {
  TVectorT<double> par_tmp = TauA1NuConstrainedFitter::TauRot(par);
  TMatrixTSym<double> cov_tmp = ErrorMatrixPropagator::propagateError(&TauA1NuConstrainedFitter::TauRot, par, cov_0);
  if (!(cov_tmp(0, 0) > 0))
    return -999;  // return invalid value if the covariance is unphysical (safety flag)
  if (par_tmp(0) > 0)
    return par_tmp(0) / sqrt(cov_tmp(0, 0));  // return the significance if the value is in the unphysical region
  return 0;  // reutrn 0 for the rotation significance if the tau is in the physical region
}

TVectorT< double > TauA1NuConstrainedFitter::SolveAmbiguityAnalytically ( const TVectorT< double > &  inpar, unsigned int  ambiguity  )

staticprivate

Definition at line 265 of file TauA1NuConstrainedFitter.cc.

References isotrackTrainRegressor::a1, CovertParToObjects(), mps_fire::i, nu_px, nu_py, nu_pz, tauImpactParameter::MultiProngTauSolver::plus, tauImpactParameter::MultiProngTauSolver::solveByRotation(), and theta().

Referenced by fit(), and SolveAmbiguityAnalyticallywithRot().

                                                                                                                     {
  // Solve equation quadratic equation
  TVectorT<double> outpar(inpar.GetNrows());
  TLorentzVector a1, nu;
  double phi(0), theta(0);
  TVector3 TauDir;
  CovertParToObjects(inpar, a1, nu, phi, theta, TauDir);
  TLorentzVector a1_d = a1;
  TLorentzVector nu_d = nu;
  TLorentzVector Tau_plus, Tau_minus, nu_plus, nu_minus;
  bool isReal;
  solveByRotation(TauDir, a1_d, Tau_plus, Tau_minus, nu_plus, nu_minus, isReal, true);
  if (amb == plus)
    nu = nu_plus;
  else
    nu = nu_minus;
  for (int i = 0; i < outpar.GetNrows(); i++) {
    outpar(i) = inpar(i);
  }
  outpar(nu_px) = nu.Px();
  outpar(nu_py) = nu.Py();
  outpar(nu_pz) = nu.Pz();
  return outpar;
}

TVectorT< double > TauA1NuConstrainedFitter::SolveAmbiguityAnalyticallywithRot ( const TVectorT< double > &  inpar, unsigned int  ambiguity  )

staticprivate

Definition at line 290 of file TauA1NuConstrainedFitter.cc.

References isotrackTrainRegressor::a1, funct::cos(), CovertParToObjects(), mps_fire::i, funct::sin(), SolveAmbiguityAnalytically(), tau_phi, tau_theta, theta(), and tauImpactParameter::MultiProngTauSolver::thetaGJMax().

Referenced by fit().

                                                                                                     {
  // Rotate and subsitute \theta_{GJ} with \theta_{GJ}^{Max} - assumes uncertianty on thata and phi of the a1 or small compared to the tau direction.
  TVectorT<double> outpar(inpar.GetNrows());
  TLorentzVector a1, nu;
  double phi(0), theta(0);
  TVector3 TauDir;
  CovertParToObjects(inpar, a1, nu, phi, theta, TauDir);
  double theta_a1(a1.Theta()), phi_a1(a1.Phi()), theta_GJMax(thetaGJMax(a1));
  TauDir.RotateZ(-phi_a1);
  TauDir.RotateY(-theta_a1);
  double phiprime(TauDir.Phi());
  TauDir = TVector3(sin(theta_GJMax) * cos(phiprime), sin(theta_GJMax) * sin(phiprime), cos(theta_GJMax));
  TauDir.RotateY(theta_a1);
  TauDir.RotateZ(phi_a1);
  for (int i = 0; i < outpar.GetNrows(); i++)
    outpar(i) = inpar(i);
  outpar(tau_phi) = TauDir.Phi();
  outpar(tau_theta) = TauDir.Theta();
  return SolveAmbiguityAnalytically(outpar, ambiguity);
}

TVectorT< double > TauA1NuConstrainedFitter::TauRot ( const TVectorT< double > &  inpar )

staticprivate

Definition at line 323 of file TauA1NuConstrainedFitter.cc.

References isotrackTrainRegressor::a1, CovertParToObjects(), theta(), and tauImpactParameter::MultiProngTauSolver::thetaGJMax().

Referenced by getTauRotationSignificance().

                                                                               {
  TVectorT<double> outpar(1);
  TLorentzVector a1, nu;
  double phi(0), theta(0);
  TVector3 TauDir;
  CovertParToObjects(inpar, a1, nu, phi, theta, TauDir);
  double theta_a1(a1.Theta()), phi_a1(a1.Phi()), theta_GJMax(thetaGJMax(a1));
  TauDir.RotateZ(-phi_a1);
  TauDir.RotateY(-theta_a1);
  outpar(0) = (TauDir.Theta() - theta_GJMax);
  return outpar;
}

void TauA1NuConstrainedFitter::UpdateExpandedPar ( )

private

Definition at line 164 of file TauA1NuConstrainedFitter.cc.

References cov, expcov, exppar, mps_fire::i, dqmiolumiharvest::j, npar, and par.

Referenced by getMother(), and getRefitDaughters().

                                                 {
  // assumes changes to a1 correlation to vertex is small
  if (par.GetNrows() == npar && cov.GetNrows() == npar && exppar.GetNrows() == npar && expcov.GetNrows() == npar)
    return;
  for (int i = 0; i < npar; i++) {
    exppar(i) = par(i);
    for (int j = 0; j < npar; j++) {
      expcov(i, j) = cov(i, j);
    }
  }
}

Member Data Documentation

unsigned int tauImpactParameter::TauA1NuConstrainedFitter::ambiguity_

private

Definition at line 61 of file TauA1NuConstrainedFitter.h.

Referenced by fit().

TMatrixTSym<double> tauImpactParameter::TauA1NuConstrainedFitter::cov

private

Definition at line 56 of file TauA1NuConstrainedFitter.h.

Referenced by fit(), TauA1NuConstrainedFitter(), and UpdateExpandedPar().

TMatrixTSym<double> tauImpactParameter::TauA1NuConstrainedFitter::cov_0

private

Definition at line 55 of file TauA1NuConstrainedFitter.h.

Referenced by fit(), getTauRotationSignificance(), and TauA1NuConstrainedFitter().

TMatrixTSym<double> tauImpactParameter::TauA1NuConstrainedFitter::expcov

private

Definition at line 59 of file TauA1NuConstrainedFitter.h.

Referenced by getMother(), getRefitDaughters(), TauA1NuConstrainedFitter(), and UpdateExpandedPar().

TVectorT<double> tauImpactParameter::TauA1NuConstrainedFitter::exppar

private

Definition at line 58 of file TauA1NuConstrainedFitter.h.

Referenced by getMother(), getRefitDaughters(), TauA1NuConstrainedFitter(), and UpdateExpandedPar().

TVectorT<double> tauImpactParameter::TauA1NuConstrainedFitter::par

private

Definition at line 54 of file TauA1NuConstrainedFitter.h.

Referenced by fit(), getTauRotationSignificance(), TauA1NuConstrainedFitter(), and UpdateExpandedPar().

TVectorT<double> tauImpactParameter::TauA1NuConstrainedFitter::par_0

private

Definition at line 53 of file TauA1NuConstrainedFitter.h.

Referenced by TauA1NuConstrainedFitter().

std::vector<LorentzVectorParticle> tauImpactParameter::TauA1NuConstrainedFitter::particles_

private

Definition at line 60 of file TauA1NuConstrainedFitter.h.

Referenced by getMother(), getRefitDaughters(), and TauA1NuConstrainedFitter().