tauImpactParameter::TrackTools Class Reference

#include <TrackTools.h>

Public Member Functions
	TrackTools ()
virtual	~TrackTools ()

Static Public Member Functions
static LorentzVectorParticle	lorentzParticleAtPosition (const TrackParticle &p, const TVector3 &v)
static TVector3	propagateToXPosition (const TrackParticle &p, double x)
static TVector3	propagateToYPosition (const TrackParticle &p, double y)
static TVector3	propagateToZPosition (const TrackParticle &p, double z)

Detailed Description

Definition at line 18 of file TrackTools.h.

Constructor & Destructor Documentation

tauImpactParameter::TrackTools::TrackTools ( )

inline

Definition at line 20 of file TrackTools.h.

{};

virtual tauImpactParameter::TrackTools::~TrackTools ( )

inlinevirtual

Definition at line 21 of file TrackTools.h.

{};

Member Function Documentation

LorentzVectorParticle TrackTools::lorentzParticleAtPosition ( const TrackParticle &  p, const TVector3 &  v  )

static

Definition at line 53 of file TrackTools.cc.

References tauImpactParameter::Particle::bField(), tauImpactParameter::TrackHelixVertexFitter::BField0, tauImpactParameter::Particle::charge(), tauImpactParameter::TrackHelixVertexFitter::computeLorentzVectorPar(), tauImpactParameter::TrackParticle::kappa, tauImpactParameter::TrackHelixVertexFitter::kappa0, tauImpactParameter::TrackParticle::lambda, tauImpactParameter::TrackHelixVertexFitter::lambda0, tauImpactParameter::TrackParticle::mass(), tauImpactParameter::TrackHelixVertexFitter::MassOffSet, tauImpactParameter::TrackHelixVertexFitter::NExtraPar, tauImpactParameter::TrackHelixVertexFitter::NFreeTrackPar, tauImpactParameter::Particle::parameter(), tauImpactParameter::Particle::pdgId(), tauImpactParameter::TrackParticle::phi, tauImpactParameter::TrackHelixVertexFitter::phi0, tauImpactParameter::ErrorMatrixPropagator::propagateError(), tauImpactParameter::TrackHelixVertexFitter::x0, tauImpactParameter::TrackHelixVertexFitter::y0, and tauImpactParameter::TrackHelixVertexFitter::z0.

{
  TVectorT<double>    FreePar(TrackHelixVertexFitter::NFreeTrackPar+TrackHelixVertexFitter::NExtraPar+TrackHelixVertexFitter::MassOffSet);
  TMatrixTSym<double> FreeParCov(TrackHelixVertexFitter::NFreeTrackPar+TrackHelixVertexFitter::NExtraPar+TrackHelixVertexFitter::MassOffSet);
  FreePar(TrackHelixVertexFitter::x0)=v.X();
  FreePar(TrackHelixVertexFitter::y0)=v.Y();
  FreePar(TrackHelixVertexFitter::z0)=v.Z();
  FreePar(TrackHelixVertexFitter::kappa0)=p.parameter(TrackParticle::kappa);
  FreePar(TrackHelixVertexFitter::lambda0)=p.parameter(TrackParticle::lambda);
  FreePar(TrackHelixVertexFitter::phi0)=p.parameter(TrackParticle::phi);
  FreePar(TrackHelixVertexFitter::NFreeTrackPar+TrackHelixVertexFitter::MassOffSet)=p.mass();
  FreePar(TrackHelixVertexFitter::NFreeTrackPar+TrackHelixVertexFitter::BField0)=p.bField();
  TVectorT<double>    LVPar=TrackHelixVertexFitter::computeLorentzVectorPar(FreePar);
  TMatrixTSym<double> LVCov=ErrorMatrixPropagator::propagateError(&TrackHelixVertexFitter::computeLorentzVectorPar,FreePar,FreeParCov);
  return LorentzVectorParticle(LVPar,LVCov,p.pdgId(),p.charge(),p.bField());
}

TVector3 TrackTools::propagateToXPosition ( const TrackParticle &  p, double  x  )

static

Definition at line 13 of file TrackTools.cc.

References funct::cos(), tauImpactParameter::TrackParticle::dxy, tauImpactParameter::TrackParticle::dz, tauImpactParameter::TrackParticle::kappa, kappa, tauImpactParameter::TrackParticle::lambda, tauImpactParameter::Particle::parameter(), tauImpactParameter::TrackParticle::phi, phi(), alignCSCRings::r, alignCSCRings::s, funct::sin(), and funct::tan().

                                                                         {
  double kappa=p.parameter(TrackParticle::kappa);
  double lam=p.parameter(TrackParticle::lambda);
  double phi=p.parameter(TrackParticle::phi);
  double dxy=p.parameter(TrackParticle::dxy);
  double dz=p.parameter(TrackParticle::dz);
  double r=kappa/2.0;
  double s=(asin((x+(r+dxy)*sin(phi))/r)-phi)/(2*kappa);
  double y=-r*cos(2.0*s*kappa+phi)+(r+dxy)*cos(phi);
  double z=dz+s*tan(lam);
  return TVector3(x,y,z);
}

TVector3 TrackTools::propagateToYPosition ( const TrackParticle &  p, double  y  )

static

Definition at line 26 of file TrackTools.cc.

References funct::cos(), tauImpactParameter::TrackParticle::dxy, tauImpactParameter::TrackParticle::dz, tauImpactParameter::TrackParticle::kappa, kappa, tauImpactParameter::TrackParticle::lambda, tauImpactParameter::Particle::parameter(), tauImpactParameter::TrackParticle::phi, phi(), alignCSCRings::r, alignCSCRings::s, funct::sin(), funct::tan(), and x().

                                                                         {
  double kappa=p.parameter(TrackParticle::kappa);
  double lam=p.parameter(TrackParticle::lambda);
  double phi=p.parameter(TrackParticle::phi);
  double dxy=p.parameter(TrackParticle::dxy);
  double dz=p.parameter(TrackParticle::dz);
  double r=kappa/2.0;
  double s=(acos(((r+dxy)*cos(phi)-y)/r)-phi)/(2*kappa);
  double x=r*sin(2.0*s*kappa+phi)-(r+dxy)*sin(phi);
  double z=dz+s*tan(lam);
  return TVector3(x,y,z);
}

TVector3 TrackTools::propagateToZPosition ( const TrackParticle &  p, double  z  )

static

Definition at line 39 of file TrackTools.cc.

References funct::cos(), tauImpactParameter::TrackParticle::dxy, tauImpactParameter::TrackParticle::dz, tauImpactParameter::TrackParticle::kappa, kappa, tauImpactParameter::TrackParticle::lambda, tauImpactParameter::Particle::parameter(), tauImpactParameter::TrackParticle::phi, phi(), alignCSCRings::r, alignCSCRings::s, funct::sin(), funct::tan(), and x().

                                                                         {
  double kappa=p.parameter(TrackParticle::kappa);
  double lam=p.parameter(TrackParticle::lambda);
  double phi=p.parameter(TrackParticle::phi);
  double dxy=p.parameter(TrackParticle::dxy);
  double dz=p.parameter(TrackParticle::dz);
  double s=(z-dz)/tan(lam);
  double r=kappa/2.0;
  double x=r*sin(2.0*s*kappa+phi)-(r+dxy)*sin(phi);
  double y=-r*cos(2.0*s*kappa+phi)+(r+dxy)*cos(phi);
  return TVector3(x,y,z);
}