#include <HTrackParameter.h>

Public Member Functions
	HTrackParameter ()

	~HTrackParameter ()

	HTrackParameter (const HTrackParameter &htrk)

HTrackParameter &	operator= (const HTrackParameter &htrk)

	HTrackParameter (const HepVector helix, const HepSymMatrix eMatrix, const int trackid, const int partid)

	HTrackParameter (const HepVector helix, const double error[], const int trackid, const int partid)

	HTrackParameter (const WTrackParameter wtrk)

	HTrackParameter (const int charge, const HepVector p, const HepVector x)

HepMatrix	dHdx (const HepVector p, const HepVector x)

HepMatrix	dHdp (const HepVector p, const HepVector x)

HepVector	hel () const

HepVector	helix () const

HepSymMatrix	eHel () const

int	trackID () const

int	partID () const

int	charge () const

double	pxy () const

HepVector	p () const

HepVector	x () const

Hep3Vector	p3 () const

HepPoint3D	x3 () const

HepLorentzVector	p (const double mass) const

HepPoint3D	center () const

double	radius () const

double	drho () const

double	phi0 () const

double	kappa () const

double	dz () const

double	lambda () const

WTrackParameter	wTrack () const

WTrackParameter	wTrack (const double mass) const

void	setTrackID (const int trackID)

void	setPartID (const int partID)

void	setHel (const HepVector he)

void	setEHel (const HepSymMatrix eH)

double	xmass (const int i) const

HepPoint3D	positionTwoHelix (const HTrackParameter) const

HepPoint3D	positionPlane (const double) const

HepPoint3D	positionCylinder (const double) const

HepPoint3D	positionCone () const

double	minDistanceTwoHelix (const HTrackParameter G, HepPoint3D &pos)

Detailed Description

Definition at line 28 of file HTrackParameter.h.

Constructor & Destructor Documentation

◆ HTrackParameter() [1/6]

HTrackParameter::HTrackParameter ( )

Definition at line 9 of file HTrackParameter.cxx.

                                 {
  m_trackID = -1;
  m_partID = -1;
  m_hel = HepVector(5, 0);
  m_eHel = HepSymMatrix(5, 0);
}

◆ ~HTrackParameter()

HTrackParameter::~HTrackParameter ( )

inline

Definition at line 32 of file HTrackParameter.h.

32{;}

◆ HTrackParameter() [2/6]

HTrackParameter::HTrackParameter ( const HTrackParameter & htrk )

Definition at line 16 of file HTrackParameter.cxx.

                                                            {
  m_trackID = htrk.m_trackID;
  m_partID = htrk.m_partID;
  m_hel = htrk.m_hel;
  m_eHel = htrk.m_eHel;
}

◆ HTrackParameter() [3/6]

HTrackParameter::HTrackParameter	(	const HepVector	helix,
		const HepSymMatrix	eMatrix,
		const int	trackid,
		const int	partid
	)

Definition at line 36 of file HTrackParameter.cxx.

                                                      {  
 
  m_hel = HepVector(5, 0);
  m_eHel = HepSymMatrix(5, 0);
 
  m_trackID = trackid;
  m_partID = partid;
  m_hel = h;
  m_eHel = eH;
 
}

◆ HTrackParameter() [4/6]

HTrackParameter::HTrackParameter	(	const HepVector	helix,
		const double	error[],
		const int	trackid,
		const int	partid
	)

Definition at line 54 of file HTrackParameter.cxx.

                                                      {
 
  m_hel = HepVector(5, 0);
  m_eHel = HepSymMatrix(5, 0);
 
  m_trackID = trackid;
  m_partID = partid;
  m_hel = h;
  int k = 0;
  for(int i = 0; i < 5; i++){
    for(int j = 0; j < 5; j++) {
      m_eHel[i][j] = eH[k];
      m_eHel[j][i] = eH[k];
      k++;
    }
  }
}

◆ HTrackParameter() [5/6]

HTrackParameter::HTrackParameter ( const WTrackParameter wtrk )

Definition at line 77 of file HTrackParameter.cxx.

                                                           {
  
  HepVector p(3, 0);
  HepVector x(3, 0);
  for(int i = 0; i < 3; i++) {
    p[i] = wtrk.w()[i];
    x[i] = wtrk.w()[i+4];
  }
  
  HTrackParameter htrk(wtrk.charge(), p, x);
  HepMatrix A(5, 3, 0);
  HepMatrix B(5, 3, 0);
  
  A = htrk.dHdx(p, x);
  B = htrk.dHdp(p, x);
  HepMatrix T(5, 7, 0);
  for(int i = 0; i < 5; i++) {
    for(int j = 0; j < 3; j++){
      T[i][j] = B[i][j];
      T[i][j+4] = A[i][j];
    }
  }
 
  HepSymMatrix eH(5, 0);
  eH = (wtrk.Ew()).similarity(T);
  int m_trackID = -1;
  double mass = (wtrk.p()).m();
  int m_partID = -1;
  for(int i = 0; i < 5; i++) {
    if(fabs(mass - xmass(i)) < 0.01) {
      m_partID = i;
      break;
    }
  }
  //  htrk.setTrackID(trackID);
  //  htrk.setPartID(partID);
  htrk.setEHel(eH);
  m_hel = htrk.hel();
  m_eHel = htrk.eHel();
}

◆ HTrackParameter() [6/6]

HTrackParameter::HTrackParameter	(	const int	charge,
		const HepVector	p,
		const HepVector	x
	)

Definition at line 146 of file HTrackParameter.cxx.

                                                                                        {
  m_trackID = -1;
  m_partID = -1;
  m_hel = HepVector(5, 0);
  m_eHel = HepSymMatrix(5, 0);
 
  HepPoint3D xyz(vx[0], vx[1], vx[2]);
  double bField = VertexFitBField::instance()->getBFieldZ(xyz);
  //std::cout << "bField in HTrackParameter(charge,p,vx) = " << bField << std::endl; 
 
  double a = alpha * bField * charge;
  double px = p[0];
  double py = p[1];
  double pz = p[2];
 
  double x = vx[0];
  double y = vx[1];
  double z = vx[2];
 
  double pxy = sqrt(px*px+py*py);
  double T = sqrt((px+a*y)*(px+a*y)+(py-a*x)*(py-a*x));
  double J= (x*px+y*py)/T*a/pxy;
 
  double drho = (pxy/a)-(T/a);
  double phi0 = fmod((4*CLHEP::pi)+atan2(0-px-a*y, py-a*x), (2*CLHEP::pi));
  double kappa = charge/pxy;
  double dz = z - (pz/a) *asin(J);
  double lambda = pz/pxy;
  
  m_hel[0] = drho; m_hel[1] = phi0; m_hel[2] = kappa; 
  m_hel[3] = dz; m_hel[4] = lambda;
}

Member Function Documentation

◆ center()

HepPoint3D HTrackParameter::center ( ) const

Definition at line 130 of file HTrackParameter.cxx.

                                         {
  double bField = VertexFitBField::instance()->getBFieldZ(x3());
  int charge = m_hel[2] > 0 ? +1: -1;
  double a = alpha * bField * charge;
  double pxy = charge/m_hel[2];
  double rad = pxy/a;
  double x = (m_hel[0] + rad) * cos(m_hel[1]);
  double y = (m_hel[0] + rad) * sin(m_hel[1]);
  double z = 0.0;
  return HepPoint3D(x, y, z);
}

Referenced by positionTwoHelix().

◆ charge()

int HTrackParameter::charge ( ) const

inline

Definition at line 107 of file HTrackParameter.h.

                                         {
  return (m_hel[2]>0 ? +1 :-1);
}

Referenced by center(), dHdp(), dHdx(), HTrackParameter(), positionTwoHelix(), radius(), and wTrack().

◆ dHdp()

HepMatrix HTrackParameter::dHdp	(	const HepVector	p,
		const HepVector	x
	)

Definition at line 218 of file HTrackParameter.cxx.

                                                                    {
  HepPoint3D xyz(vx[0], vx[1], vx[2]);
  double bField = VertexFitBField::instance()->getBFieldZ(xyz);
 
  double a = alpha * bField * charge();
  double px = p[0];
  double py = p[1];
  double pz = p[2];
 
  double x = vx[0];
  double y = vx[1];
  //  double z = vx[2];
 
  double pxy = sqrt(px*px+py*py);
  double T = sqrt((px+a*y)*(px+a*y)+(py-a*x)*(py-a*x));
  double J= (x*px+y*py)/T*a/pxy;
 
  HepMatrix m_B(5, 3, 0);
 
  m_B[0][0] = (px/pxy - (px+a*y)/T)/a;
  m_B[0][1] = (py/pxy - (py-a*x)/T)/a;
  m_B[1][0] = 0 -(py-a*x)/T/T;
  m_B[1][1] = (px + a*y)/T/T;
  m_B[2][0] = 0-charge() *px/pxy/pxy/pxy;
  m_B[2][1] = 0-charge() *py/pxy/pxy/pxy;
  m_B[3][0] = (pz/a)*(py/pxy/pxy-(py-a*x)/T/T);
  m_B[3][1] = 0-(pz/a)*(px/pxy/pxy-(px+a*y)/T/T);
  m_B[3][2] = 0 - asin(J)/a;
  m_B[4][0] = 0 - (px/pxy)*(pz/pxy)/pxy;  
  m_B[4][1] = 0 - (py/pxy)*(pz/pxy)/pxy;  
  m_B[4][2] = 1/pxy;
  
  return m_B;
}

Referenced by HTrackParameter().

◆ dHdx()

HepMatrix HTrackParameter::dHdx	(	const HepVector	p,
		const HepVector	x
	)

Definition at line 183 of file HTrackParameter.cxx.

                                                                    {
  HepPoint3D xyz(vx[0], vx[1], vx[2]);
  double bField = VertexFitBField::instance()->getBFieldZ(xyz);
  //std::cout << "bField in dHdx(p,vx) = " << bField << std::endl;
 
  double a = alpha * bField * charge();
  double px = p[0];
  double py = p[1];
  double pz = p[2];
 
  double x = vx[0];
  double y = vx[1];
  //  double z = vx[2];
 
  //  double pxy = sqrt(px*px+py*py);
  double T = sqrt((px+a*y)*(px+a*y)+(py-a*x)*(py-a*x));
  //  double J= (x*px+y*py)/T*a/pxy;
 
  HepMatrix m_A(5, 3, 0);
 
  m_A[0][0] = (py-a*x)/T;
  m_A[0][1] = 0 -(px + a*y)/T;
  m_A[1][0] = 0- a*(px + a*y)/T/T;
  m_A[1][1] = 0 - a * (py - a*x)/T/T;
  m_A[3][0] = 0 - (pz/T)*(px + a*y)/T;
  m_A[3][1] = 0 - (pz/T)*(py - a*x)/T;
  m_A[3][2] = 1;
 
  return m_A;
}

Referenced by HTrackParameter().

◆ drho()

double HTrackParameter::drho ( ) const

inline

Definition at line 67 of file HTrackParameter.h.

67{return m_hel[0];}

Referenced by HTrackParameter().

◆ dz()

double HTrackParameter::dz ( ) const

inline

Definition at line 70 of file HTrackParameter.h.

70{return m_hel[3];}

Referenced by HTrackParameter().

◆ eHel()

HepSymMatrix HTrackParameter::eHel ( ) const

inline

Definition at line 51 of file HTrackParameter.h.

51{return m_eHel;}

Referenced by KalmanVertexFit::addTrack(), HTrackParameter(), KalmanKinematicFit::pull(), KinematicFit::pull(), and VertexFit::pull().

◆ hel()

HepVector HTrackParameter::hel ( ) const

inline

Definition at line 49 of file HTrackParameter.h.

49{return m_hel;}

Referenced by HTrackParameter(), KalmanKinematicFit::pull(), and KinematicFit::pull().

◆ helix()

HepVector HTrackParameter::helix ( ) const

inline

Definition at line 50 of file HTrackParameter.h.

50{return m_hel;}

Referenced by VertexFit::pull().

◆ kappa()

double HTrackParameter::kappa ( ) const

inline

Definition at line 69 of file HTrackParameter.h.

69{return m_hel[2];}

Referenced by HTrackParameter(), and wTrack().

◆ lambda()

double HTrackParameter::lambda ( ) const

inline

Definition at line 71 of file HTrackParameter.h.

71{return m_hel[4];}

Referenced by HTrackParameter(), minDistanceTwoHelix(), and wTrack().

◆ minDistanceTwoHelix()

double HTrackParameter::minDistanceTwoHelix	(	const HTrackParameter	G,
		HepPoint3D &	pos
	)

Definition at line 427 of file HTrackParameter.cxx.

                                                                                     {
  int ifail;
  double h = radius();
  double g = G.radius();
  double phiH0 = fmod((4*CLHEP::pi)+atan2(p3().y(), p3().x()), (2*CLHEP::pi));
  double phiG0 = fmod((4*CLHEP::pi)+atan2(G.p3().y(), G.p3().x()), (2*CLHEP::pi));
  double lamH = lambda();
  double lamG = G.lambda();
  double a = x3().x() - G.x3().x() + g*sin(phiG0) - h*sin(phiH0);
  double b = x3().y() - G.x3().y() - g*cos(phiG0) + h*cos(phiH0);
  double c1 = h*lamH*lamH;
  double c2 = 0 - g*lamG*lamG;
  double d1 = 0 - g*lamG*lamH;
  double d2 = h*lamG*lamH;
  double e1 = lamH*(x3().z() - G.x3().z() - h*phiH0*lamH + g*phiG0*lamG);
  double e2 = lamG*(x3().z() - G.x3().z() - h*phiH0*lamH + g*phiG0*lamG);
 
  HepVector phiE(2, 0);
  phiE[0] = phiH0;
  phiE[1] = phiG0;
  for(int iter = 0; iter < 100; iter++) {
    HepVector z(2, 0);
    HepSymMatrix Omega(2, 0);
    double phiH = phiE[0];
    double phiG = phiE[1];
    z[0] = cos(phiH)*(a-g*sin(phiG))+sin(phiH)*(b+g*cos(phiG))+c1*phiH+d1*phiG+e1;
    z[1] = cos(phiG)*(a+h*sin(phiH))+sin(phiG)*(b-h*cos(phiH))+c2*phiG+d2*phiH+e2;
    Omega[0][0] = 0-sin(phiH)*(a-g*sin(phiG))+cos(phiH)*(b+g*cos(phiG))+c1;
    Omega[0][1] = -g*cos(phiH)*cos(phiG)-g*sin(phiH)*sin(phiG)+d1;
    Omega[1][0] =h*cos(phiH)*cos(phiG)+h*sin(phiG)*sin(phiH)+d2;
    Omega[1][1] = -sin(phiG)*(a+h*sin(phiH))+cos(phiG)*(b-h*cos(phiH))+c2;
    HepVector phi(2, 0);
    phi = phiE - Omega.inverse(ifail) * z;
    if((fabs(phi[0]-phiE[0])<1E-3) && (fabs(phi[1]-phiE[1])<1E-3)) {
      phiE = phi;
      //      std::cout << "number of iteration = " << iter <<std::endl;
      break;
    }
    phiE = phi;
  }
 
  double phiH = phiE[0];
  double phiG = phiE[1];
  HepPoint3D posH = HepPoint3D(x3().x()+h*(sin(phiH)-sin(phiH0)), x3().y()+h*(cos(phiH0)-cos(phiH)), x3().z()+lamH*(phiH-phiH0));
  HepPoint3D posG = HepPoint3D(G.x3().x()+g*(sin(phiG)-sin(phiG0)), G.x3().y()+g*(cos(phiG0)-cos(phiG)), G.x3().z()+lamG*(phiG-phiG0));
  double dis = (posH-posG).rho();
  mpos = 0.5*(posH+posG);
  return dis;
}

Referenced by BeamParams::execute().

◆ operator=()

HTrackParameter & HTrackParameter::operator= ( const HTrackParameter & htrk )

Definition at line 23 of file HTrackParameter.cxx.

                                                                           {
  m_trackID = htrk.m_trackID;
  m_partID = htrk.m_partID;
  m_hel = htrk.m_hel;
  m_eHel = htrk.m_eHel;
  return (*this);
}

◆ p() [1/2]

HepVector HTrackParameter::p ( ) const

inline

Definition at line 115 of file HTrackParameter.h.

                                          {
  HepVector p0(3, 0);
  double pxy = 1./fabs(m_hel[2]);
  p0[0] = 0 - pxy*sin(m_hel[1]);
  p0[1] = pxy*cos(m_hel[1]); 
  p0[2] = pxy * m_hel[4];
  return p0;
}

Referenced by KalmanVertexFit::addTrack(), dHdp(), dHdx(), and HTrackParameter().

◆ p() [2/2]

HepLorentzVector HTrackParameter::p ( const double mass ) const

inline

Definition at line 142 of file HTrackParameter.h.

                                                                 {
//   // xum 2007-12-28  
//   //Hep3Vector ptrk = (p3()).rho();
//   Hep3Vector ptrk = (p3()).r();
//   double e = sqrt(ptrk*ptrk+mass*mass);
//   return HepLorentzVector(p3(), e);
 
  // nefedov 2011-11-17
  Hep3Vector p3tmp = p3();
  double ptrk = p3tmp.r();
  double e = sqrt(ptrk*ptrk+mass*mass);
  return HepLorentzVector(p3tmp, e);
}

◆ p3()

Hep3Vector HTrackParameter::p3 ( ) const

inline

Definition at line 137 of file HTrackParameter.h.

                                            {
  double pxy = 1./fabs(m_hel[2]);
  return Hep3Vector(0-pxy*sin(m_hel[1]), pxy*cos(m_hel[1]), pxy*m_hel[4]);
}

Referenced by minDistanceTwoHelix(), p(), positionTwoHelix(), and wTrack().

◆ partID()

int HTrackParameter::partID ( ) const

inline

Definition at line 53 of file HTrackParameter.h.

53{return m_partID;}

Referenced by setPartID().

◆ phi0()

double HTrackParameter::phi0 ( ) const

inline

Definition at line 68 of file HTrackParameter.h.

68{return m_hel[1];}

Referenced by HTrackParameter(), and wTrack().

◆ positionCone()

HepPoint3D HTrackParameter::positionCone ( ) const

Definition at line 419 of file HTrackParameter.cxx.

                                               {
  return HepPoint3D(999,999,999);
}

◆ positionCylinder()

HepPoint3D HTrackParameter::positionCylinder ( const double R ) const

Definition at line 411 of file HTrackParameter.cxx.

                                                                 {
  return HepPoint3D(999,999,999);
}

◆ positionPlane()

HepPoint3D HTrackParameter::positionPlane ( const double zp ) const

Definition at line 403 of file HTrackParameter.cxx.

                                                               {
  return HepPoint3D(999,999,999);
}

◆ positionTwoHelix()

HepPoint3D HTrackParameter::positionTwoHelix ( const HTrackParameter htrk ) const

Definition at line 311 of file HTrackParameter.cxx.

                                                                            {
  double bField1 = VertexFitBField::instance()->getBFieldZ(x3());
  double bField2 = VertexFitBField::instance()->getBFieldZ(htrk.x3());
 
  HepPoint3D pos1 = x3();
  HepPoint3D pos2 = htrk.x3();
  double rad1 = radius();
  double rad2 = htrk.radius();
  HepPoint3D xc1 = center();
  HepPoint3D xc2 = htrk.center();
  //
  // requires the solution of
  // a * y**2 + b*y + c = 0 
  // and
  // x = (rt - 2*yt * y) / (2 * xt) 
  // where
  // xt = xc2.x() - xc1.x()
  // yt = xc2.y() - xc1.y()
  // rt = rad1*rad1-rad2*rad2-xc1.perp2()+xc2.perp2()
  // a = 1 + yt*yt/(xt*xt);
  // b = 2*xc1.x()*yt/xt-yt*rt/(xt*xt)-2*xc1.y();
  // c = rt*rt/(4*xt*xt)-xc1.x()*rt/xt-rad1*rad1+xc1.perp2();
  //
  
  double xt = xc2.x() - xc1.x();
  double yt = xc2.y() - xc1.y();
  if(xt == 0 && yt == 0)  return HepPoint3D(999,999,999);
  double rt = rad1*rad1-rad2*rad2-xc1.perp2()+xc2.perp2();
  double x1, y1, x2, y2;
  if( xt != 0) {
    double a = 1 + yt*yt/(xt*xt);
    if(a == 0)   return HepPoint3D(999,999,999);
    double b = 2*xc1.x()*yt/xt-yt*rt/(xt*xt)-2*xc1.y();
    double c = rt*rt/(4*xt*xt)-xc1.x()*rt/xt-rad1*rad1+xc1.perp2();
    double d = b*b - 4 * a * c;
    if( d < 0)   return HepPoint3D(999,999,999);
    d = sqrt(d);
    // two solution of intersection points
 
    y1 = (-b + d)/(2*a);
    x1 = (rt - 2 * yt * y1)/(2*xt);
  
    y2 = (-b - d)/(2*a);
    x2 = (rt - 2 * yt * y2)/(2*xt);
  } else {
    double a = 1 + xt*xt/(yt*yt);
    if(a == 0)   return HepPoint3D(999,999,999);
    double b = 2*xc1.y()*xt/yt-xt*rt/(yt*yt)-2*xc1.x();
    double c = rt*rt/(4*yt*yt)-xc1.y()*rt/yt-rad1*rad1+xc1.perp2();
    double d = b*b - 4 * a * c;
    if( d < 0)   return HepPoint3D(999,999,999);
    d = sqrt(d);
    // two solution of intersection points
 
    x1 = (-b + d)/(2*a);
    y1 = (rt - 2 * xt * x1)/(2*yt);
  
    x2 = (-b - d)/(2*a);
    y2 = (rt - 2 * xt * x2)/(2*yt);
  }
 
  double z1[2], z2[2], J1[2], J2[2];
 
  
  double a1 = alpha * bField1 * charge();
  double a2 = alpha * bField2 * htrk.charge();
  // z for solotion one
  J1[0] = a1*((x1-x3().x())*p3().x()+(y1-x3().y())*p3().y())/p3().perp2();
  J1[1] = a2*((x1-htrk.x3().x())*htrk.p3().x()+(y1-htrk.x3().y())*htrk.p3().y())/htrk.p3().perp2();
  z1[0] = x3().z()+p3().z()/a1*asin(J1[0]);
  z1[1] = htrk.x3().z()+htrk.p3().z()/a2*asin(J1[1]);
  // z for solotion two
  J2[0] = a1*((x2-x3().x())*p3().x()+(y2-x3().y())*p3().y())/p3().perp2();
  J2[1] = a2*((x2-htrk.x3().x())*htrk.p3().x()+(y2-htrk.x3().y())*htrk.p3().y())/htrk.p3().perp2();
  z2[0] = x3().z()+p3().z()/a2*asin(J2[0]);
  z2[1] = htrk.x3().z()+htrk.p3().z()/a2*asin(J2[1]);
 
  // take the solution if delta z is small
 
  if(fabs(z1[0]-z1[1]) < fabs(z2[0]-z2[1])) {
    return HepPoint3D(x1, y1, 0.5*(z1[0]+z1[1]));
  } else {
    return HepPoint3D(x2, y2, 0.5*(z2[0]+z2[1]));
  }
}

◆ pxy()

double HTrackParameter::pxy ( ) const

inline

Definition at line 111 of file HTrackParameter.h.

                                         {
  return fabs(1/m_hel[2]);
}

Referenced by center(), dHdp(), HTrackParameter(), p(), p3(), and radius().

◆ radius()

double HTrackParameter::radius ( ) const

Definition at line 122 of file HTrackParameter.cxx.

                                     {
  double bField = VertexFitBField::instance()->getBFieldZ(x3());
  int charge = m_hel[2] > 0 ? +1: -1;
  double a = alpha * bField * charge;
  double pxy = charge/m_hel[2];
  return (pxy/a);
}

Referenced by minDistanceTwoHelix(), and positionTwoHelix().

◆ setEHel()

void HTrackParameter::setEHel ( const HepSymMatrix eH )

inline

Definition at line 83 of file HTrackParameter.h.

83{m_eHel = eH;}

Referenced by HTrackParameter().

◆ setHel()

void HTrackParameter::setHel ( const HepVector he )

inline

Definition at line 82 of file HTrackParameter.h.

82{m_hel = he;}

◆ setPartID()

void HTrackParameter::setPartID ( const int partID )

inline

Definition at line 80 of file HTrackParameter.h.

80{ m_partID = partID;}

HTrackParameter::partID

int partID() const

Definition: HTrackParameter.h:53

◆ setTrackID()

void HTrackParameter::setTrackID ( const int trackID )

inline

Definition at line 79 of file HTrackParameter.h.

79{m_trackID = trackID;}

HTrackParameter::trackID

int trackID() const

Definition: HTrackParameter.h:52

◆ trackID()

int HTrackParameter::trackID ( ) const

inline

Definition at line 52 of file HTrackParameter.h.

52{return m_trackID;}

Referenced by setTrackID().

◆ wTrack() [1/2]

WTrackParameter HTrackParameter::wTrack ( ) const

Definition at line 288 of file HTrackParameter.cxx.

                                              {
  WTrackParameter wtrk;
  if(m_partID > -1 && m_partID < 5) {
    double mass = xmass(m_partID);
    wtrk = wTrack(mass);
  } 
  return wtrk;
}

Referenced by wTrack().

◆ wTrack() [2/2]

WTrackParameter HTrackParameter::wTrack ( const double mass ) const

Definition at line 257 of file HTrackParameter.cxx.

                                                               {
 
  WTrackParameter wtrk;
  wtrk.setCharge(charge());
  HepVector w(7,0);
  HepMatrix dWdh(7, 5, 0);
  
  double ptrk = p3().rho(); double E = sqrt(ptrk*ptrk + mass * mass);
  double px = p3().x();
  double py = p3().y();
  double pz = p3().z();
  double x0 = x3().x();
  double y0 = x3().y();
  double z0 = x3().z();
  w[0] = px; w[1] = py; w[2] = pz; w[3] = E;
  w[4] = x0; w[5] = y0; w[6] = z0; 
  wtrk.setW(w);
  dWdh[0][1] = -py; dWdh[0][2] = 0 - px/kappa();
  dWdh[1][1] = px; dWdh[1][2] = 0 - py/kappa();
  dWdh[2][2] = 0 - pz/kappa(); dWdh[2][4] = charge()/kappa();
  dWdh[3][2] = 0 - (1 + lambda() * lambda())/ E / kappa() / kappa() / kappa();
  dWdh[3][4] = lambda() / E / kappa() / kappa();
  dWdh[4][0] = cos(phi0()); dWdh[4][1] = 0 - y0;
  dWdh[5][0] = sin(phi0()); dWdh[5][1] = x0;
  dWdh[6][3] = 1;
  HepSymMatrix Ew(7, 0);
  Ew = m_eHel.similarity(dWdh);
  wtrk.setEw(Ew);
  return wtrk;
}

◆ x()

HepVector HTrackParameter::x ( ) const

inline

Definition at line 125 of file HTrackParameter.h.

                                          {
  HepVector v0(3, 0);
  v0[0] = m_hel[0]*cos(m_hel[1]); 
  v0[1] = m_hel[0]*sin(m_hel[1]); 
  v0[2] = m_hel[3];
  return v0;
}

Referenced by center(), dHdp(), dHdx(), HTrackParameter(), and minDistanceTwoHelix().

◆ x3()

HepPoint3D HTrackParameter::x3 ( ) const

inline

Definition at line 133 of file HTrackParameter.h.

                                            {
  return HepPoint3D(m_hel[0]*cos(m_hel[1]), m_hel[0]*sin(m_hel[1]), m_hel[3]);
}

Referenced by center(), minDistanceTwoHelix(), positionTwoHelix(), radius(), and wTrack().

◆ xmass()

double HTrackParameter::xmass ( const int i ) const

Definition at line 301 of file HTrackParameter.cxx.

                                         {
  double mass[5] = {0.000511, 0.105658, 0.139570,0.493677, 0.938272};
  if(n < 0 || n >=5) return 0.0;
  return mass[n];
}

The documentation for this class was generated from the following files:

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ HTrackParameter() [1/6]

◆ ~HTrackParameter()

◆ HTrackParameter() [2/6]

◆ HTrackParameter() [3/6]

◆ HTrackParameter() [4/6]

◆ HTrackParameter() [5/6]

◆ HTrackParameter() [6/6]

Member Function Documentation

◆ center()

◆ charge()

◆ dHdp()

◆ dHdx()

◆ drho()

◆ dz()

◆ eHel()

◆ hel()

◆ helix()

◆ kappa()

◆ lambda()

◆ minDistanceTwoHelix()

◆ operator=()

◆ p() [1/2]

◆ p() [2/2]

◆ p3()

◆ partID()

◆ phi0()

◆ positionCone()

◆ positionCylinder()

◆ positionPlane()

◆ positionTwoHelix()

◆ pxy()

◆ radius()

◆ setEHel()

◆ setHel()

◆ setPartID()

◆ setTrackID()

◆ trackID()

◆ wTrack() [1/2]

◆ wTrack() [2/2]

◆ x()

◆ x3()

◆ xmass()