#include <L1MuonPixelTrackFitter.h>

Inheritance diagram for L1MuonPixelTrackFitter:

Classes
class	Circle
Public Member Functions
	L1MuonPixelTrackFitter ()
	L1MuonPixelTrackFitter (const edm::ParameterSet &cfg)
virtual reco::Track *	run (const edm::EventSetup &es, const std::vector< const TrackingRecHit * > &hits, const TrackingRegion &region) const
void	setL1Constraint (const L1MuGMTCand &muon)
void	setPxConstraint (const SeedingHitSet &hits)
virtual	~L1MuonPixelTrackFitter ()
Static Public Member Functions
static double	getBending (double invPt, double eta, int charge)
static double	getBendingError (double invPt, double eta)
Private Member Functions
double	deltaPhi (double phi1, double phi2) const
double	errCotTheta (double invPt, double eta) const
double	errInversePt (double invPt, double eta) const
double	errPhi (double invPt, double eta) const
double	errTip (double invPt, double eta) const
double	errZip (double invPt, double eta) const
double	findPt (double phi0, double phiL1, double eta, int charge) const
double	valCotTheta (const PixelRecoLineRZ &line) const
double	valInversePt (double phi0, double phiL1, double eta) const
double	valPhi (const Circle &c, int charge) const
double	valTip (const Circle &c, double curvature) const
double	valZip (double curvature, const GlobalPoint &p0, const GlobalPoint &p1) const
Static Private Member Functions
static void	param (double eta, double &p1, double &p2, double &p3)
Private Attributes
int	theChargeL1
edm::ParameterSet	theConfig
double	theEtaL1
GlobalPoint	theHit1
GlobalPoint	theHit2
double	thePhiL1
Friends
class	L1Seeding

Detailed Description

Definition at line 24 of file L1MuonPixelTrackFitter.h.

Constructor & Destructor Documentation

L1MuonPixelTrackFitter::L1MuonPixelTrackFitter ( ) [inline]

Definition at line 49 of file L1MuonPixelTrackFitter.h.

{}

L1MuonPixelTrackFitter::L1MuonPixelTrackFitter ( const edm::ParameterSet & cfg )

Definition at line 17 of file L1MuonPixelTrackFitter.cc.

  : theConfig(cfg)
{ }

virtual L1MuonPixelTrackFitter::~L1MuonPixelTrackFitter ( ) [inline, virtual]

Definition at line 52 of file L1MuonPixelTrackFitter.h.

{}

Member Function Documentation

double L1MuonPixelTrackFitter::deltaPhi	(	double	phi1,
		double	phi2
	)		const `[private]`

Definition at line 417 of file L1MuonPixelTrackFitter.cc.

References dPhi(), and M_PI.

Referenced by findPt(), and valInversePt().

{
  while ( phi1 >= 2*M_PI) phi1 -= 2*M_PI;
  while ( phi2 >= 2*M_PI) phi2 -= 2*M_PI;
  while ( phi1 < 0) phi1 += 2*M_PI;
  while ( phi2 < 0) phi2 += 2*M_PI;
  double dPhi = phi2-phi1;

  if ( dPhi > M_PI ) dPhi -= 2*M_PI;
  if ( dPhi < -M_PI ) dPhi += 2*M_PI;

  return dPhi;
}

double L1MuonPixelTrackFitter::errCotTheta	(	double	invPt,
		double	eta
	)		const `[private]`

Definition at line 145 of file L1MuonPixelTrackFitter.cc.

References p1.

Referenced by run().

{
  //
  // sigma = p0+p1/|pt|;
  //
  double p0,p1;
  int ieta = int (10*fabs(eta));
  switch (ieta) {
  case 0:  { p0 = 0.00166115; p1 = 5.75533e-05; break; }
  case 1:  { p0 = 0.00157525; p1 = 0.000707437; break; }
  case 2:  { p0 = 0.00122246; p1 = 0.000325456; break; }
  case 3:  { p0 = 0.000852422; p1 = 0.000429216; break; }
  case 4:  { p0 = 0.000637561; p1 = 0.00122298; break; }
  case 5:  { p0 = 0.000555766; p1 = 0.00158096; break; }
  case 6:  { p0 = 0.000641202; p1 = 0.00143339; break; }
  case 7:  { p0 = 0.000803207; p1 = 0.000648816; break; }
  case 8:  { p0 = 0.000741394; p1 = 0.0015289; break; }
  case 9:  { p0 = 0.000652019; p1 = 0.00168873; break; }
  case 10:  { p0 = 0.000716902; p1 = 0.00257556; break; }
  case 11:  { p0 = 0.000800409; p1 = 0.00190563; break; }
  case 12:  { p0 = 0.000808778; p1 = 0.00264139; break; }
  case 13:  { p0 = 0.000775757; p1 = 0.00318478; break; }
  case 14:  { p0 = 0.000705781; p1 = 0.00460576; break; }
  case 15:  { p0 = 0.000580679; p1 = 0.00748248; break; }
  case 16:  { p0 = 0.000561667; p1 = 0.00767487; break; }
  case 17:  { p0 = 0.000521626; p1 = 0.0100178; break; }
  case 18:  { p0 = 0.00064253; p1 = 0.0106062; break; }
  case 19:  { p0 = 0.000636868; p1 = 0.0140047; break; }
  default:  { p0 = 0.000682478; p1 = 0.0163569; break; }
  }
  return p0+p1*fabs(invPt);
}

double L1MuonPixelTrackFitter::errInversePt	(	double	invPt,
		double	eta
	)		const `[private]`

Definition at line 298 of file L1MuonPixelTrackFitter.cc.

References p1.

Referenced by run().

                                                                          {
  //
  // pt*sigma(1/pt) = p0+p1*pt;
  //
  double p0,p1;
  int ieta = int (10*fabs(eta));
  switch (ieta) {
  case 0:  { p0 = 0.0196835; p1 = 0.00517533; break; }
  case 1:  { p0 = 0.0266583; p1 = 0.00478101; break; }
  case 2:  { p0 = 0.0217164; p1 = 0.00545425; break; }
  case 3:  { p0 = 0.0197547; p1 = 0.00552263; break; }
  case 4:  { p0 = 0.0208778; p1 = 0.00536009; break; }
  case 5:  { p0 = 0.024192; p1 = 0.00521709; break; }
  case 6:  { p0 = 0.0265315; p1 = 0.0051897; break; }
  case 7:  { p0 = 0.0198071; p1 = 0.00566822; break; }
  case 8:  { p0 = 0.0361955; p1 = 0.00486352; break; }
  case 9:  { p0 = 0.037864; p1 = 0.00509094; break; }
  case 10:  { p0 = 0.0382968; p1 = 0.00612354; break; }
  case 11:  { p0 = 0.0308326; p1 = 0.0074234; break; }
  case 12:  { p0 = 0.0248577; p1 = 0.00883049; break; }
  case 13:  { p0 = 0.0279965; p1 = 0.00888293; break; }
  case 14:  { p0 = 0.0372582; p1 = 0.00950252; break; }
  case 15:  { p0 = 0.0281366; p1 = 0.0111501; break; }
  case 16:  { p0 = 0.0421483; p1 = 0.0109413; break; }
  case 17:  { p0 = 0.0461798; p1 = 0.0125824; break; }
  case 18:  { p0 = 0.0530603; p1 = 0.0132638; break; }
  case 19:  { p0 = 0.0601148; p1 = 0.0147911; break; }
  default:  { p0 = 0.0552377; p1 = 0.0155574; break; }
  }
  return p1+p0*fabs(invPt);
}

double L1MuonPixelTrackFitter::errPhi	(	double	invPt,
		double	eta
	)		const `[private]`

Definition at line 107 of file L1MuonPixelTrackFitter.cc.

References p1.

Referenced by run().

                                                                    {
  //
  // sigma = p0+p1/|pt|;
  //
  double p0,p1;
  int ieta = int (10*fabs(eta));
  switch (ieta) {
  case 0:  { p0 = 0.000597506; p1 = 0.00221057; break; }
  case 1:  { p0 = 0.000591867; p1 = 0.00278744; break; }
  case 2:  { p0 = 0.000635666; p1 = 0.00207433; break; }
  case 3:  { p0 = 0.000619086; p1 = 0.00255121; break; }
  case 4:  { p0 = 0.000572067; p1 = 0.00310618; break; }
  case 5:  { p0 = 0.000596239; p1 = 0.00288442; break; }
  case 6:  { p0 = 0.000607608; p1 = 0.00282996; break; }
  case 7:  { p0 = 0.000606446; p1 = 0.00281118; break; }
  case 8:  { p0 = 0.000594076; p1 = 0.00280546; break; }
  case 9:  { p0 = 0.000579615; p1 = 0.00335534; break; }
  case 10:  { p0 = 0.000659546; p1 = 0.00340443; break; }
  case 11:  { p0 = 0.000659031; p1 = 0.00343151; break; }
  case 12:  { p0 = 0.000738391; p1 = 0.00337297; break; }
  case 13:  { p0 = 0.000798966; p1 = 0.00330008; break; }
  case 14:  { p0 = 0.000702997; p1 = 0.00562643; break; }
  case 15:  { p0 = 0.000973417; p1 = 0.00312666; break; }
  case 16:  { p0 = 0.000995213; p1 = 0.00564278; break; }
  case 17:  { p0 = 0.00121436; p1 = 0.00572704; break; }
  case 18:  { p0 = 0.00119216; p1 = 0.00760204; break; }
  case 19:  { p0 = 0.00141204; p1 = 0.0093777; break; }
  default:  { p0 = 0.00153161; p1 = 0.00940265; break; }
  }
  return p0+p1*fabs(invPt);
}

double L1MuonPixelTrackFitter::errTip	(	double	invPt,
		double	eta
	)		const `[private]`

Definition at line 187 of file L1MuonPixelTrackFitter.cc.

References p1.

Referenced by run().

                                                                    {
  //
  // sigma = p0+p1/|pt|;
  //
  double p0,p1;
  int ieta = int (10*fabs(eta));
  switch (ieta) {
  case 0:  { p0 = 0.00392416; p1 = 0.00551809; break; }
  case 1:  { p0 = 0.00390391; p1 = 0.00543244; break; }
  case 2:  { p0 = 0.0040651; p1 = 0.00406496; break; }
  case 3:  { p0 = 0.00387782; p1 = 0.00797637; break; }
  case 4:  { p0 = 0.00376798; p1 = 0.00866894; break; }
  case 5:  { p0 = 0.0042131; p1 = 0.00462184; break; }
  case 6:  { p0 = 0.00392579; p1 = 0.00784685; break; }
  case 7:  { p0 = 0.00370472; p1 = 0.00790174; break; }
  case 8:  { p0 = 0.00364433; p1 = 0.00928368; break; }
  case 9:  { p0 = 0.00387578; p1 = 0.00640431; break; }
  case 10:  { p0 = 0.00382464; p1 = 0.00960763; break; }
  case 11:  { p0 = 0.0038907; p1 = 0.0104562; break; }
  case 12:  { p0 = 0.00392525; p1 = 0.0106442; break; }
  case 13:  { p0 = 0.00400634; p1 = 0.011218; break; }
  case 14:  { p0 = 0.0036229; p1 = 0.0156403; break; }
  case 15:  { p0 = 0.00444317; p1 = 0.00832987; break; }
  case 16:  { p0 = 0.00465492; p1 = 0.0179908; break; }
  case 17:  { p0 = 0.0049652; p1 = 0.0216647; break; }
  case 18:  { p0 = 0.0051395; p1 = 0.0233692; break; }
  case 19:  { p0 = 0.0062917; p1 = 0.0262175; break; }
  default:  { p0 = 0.00714444; p1 = 0.0253856; break; }
  }
  return p0+p1*fabs(invPt);
}

double L1MuonPixelTrackFitter::errZip	(	double	invPt,
		double	eta
	)		const `[private]`

Definition at line 238 of file L1MuonPixelTrackFitter.cc.

References p1.

Referenced by run().

                                                                    {
  //
  // sigma = p0+p1/pt;
  //
  double p0,p1;
  int ieta = int (10*fabs(eta));
  switch (ieta) {
  case 0:  { p0 = 0.0120743; p1 = 0; break; }
  case 1:  { p0 = 0.0110343; p1 = 0.0051199; break; }
  case 2:  { p0 = 0.00846487; p1 = 0.00570084; break; }
  case 3:  { p0 = 0.00668726; p1 = 0.00331165; break; }
  case 4:  { p0 = 0.00467126; p1 = 0.00578239; break; }
  case 5:  { p0 = 0.0043042; p1 = 0.00598517; break; }
  case 6:  { p0 = 0.00515392; p1 = 0.00495422; break; }
  case 7:  { p0 = 0.0060843; p1 = 0.00320512; break; }
  case 8:  { p0 = 0.00564942; p1 = 0.00478876; break; }
  case 9:  { p0 = 0.00532111; p1 = 0.0073239; break; }
  case 10:  { p0 = 0.00579429; p1 = 0.00952782; break; }
  case 11:  { p0 = 0.00614229; p1 = 0.00977795; break; }
  case 12:  { p0 = 0.00714661; p1 = 0.00550482; break; }
  case 13:  { p0 = 0.0066593; p1 = 0.00999362; break; }
  case 14:  { p0 = 0.00634922; p1 = 0.0148156; break; }
  case 15:  { p0 = 0.00600586; p1 = 0.0318022; break; }
  case 16:  { p0 = 0.00676919; p1 = 0.027456; break; }
  case 17:  { p0 = 0.00670066; p1 = 0.0317005; break; }
  case 18:  { p0 = 0.00752392; p1 = 0.0347714; break; }
  case 19:  { p0 = 0.00791425; p1 = 0.0566665; break; }
  default:  { p0 = 0.00882372; p1 = 0.0596858; break; }
  }
  return  p0+p1*fabs(invPt);
}

double L1MuonPixelTrackFitter::findPt	(	double	phi0,
		double	phiL1,
		double	eta,
		int	charge
	)		const `[private]`

Definition at line 330 of file L1MuonPixelTrackFitter.cc.

References deltaPhi(), and getBending().

                                                                                             {

  double dphi_min = fabs(deltaPhi(phi0,phiL1));
  double pt_best = 1.;
  double pt_cur = 1;
  while ( pt_cur < 10000.) {
    double phi_exp = phi0+getBending(1./pt_cur, eta, charge);
    double dphi = fabs(deltaPhi(phi_exp,phiL1));
    if ( dphi < dphi_min) {
      pt_best = pt_cur;
      dphi_min = dphi;
    }
    if (pt_cur < 10.) pt_cur += 0.01; 
    else if (pt_cur < 20.) pt_cur+= 0.025; 
    else if( pt_cur < 100.) pt_cur+= 0.1;
    else pt_cur +=1;
  };
  return pt_best;
}

double L1MuonPixelTrackFitter::getBending	(	double	invPt,
		double	eta,
		int	charge
	)		`[static]`

Definition at line 351 of file L1MuonPixelTrackFitter.cc.

References p1, p2, p3, and param().

Referenced by findPt(), and L1MuonRegionProducer::regions().

{
  double p1, p2, p3;
  param(eta,p1,p2,p3);
  return charge*p1*invPt + charge*p2*invPt*invPt + charge*p3*invPt*invPt*invPt;
}

double L1MuonPixelTrackFitter::getBendingError	(	double	invPt,
		double	eta
	)		`[static]`

Definition at line 358 of file L1MuonPixelTrackFitter.cc.

References p1, and funct::sqr().

Referenced by L1MuonRegionProducer::regions().

{
  int ieta = int (10*fabs(eta));
  double p0,p1;
  switch (ieta) {
  case 0:  { p0 = 0.0196835; p1 = 0.00517533; break; }
  case 1:  { p0 = 0.0266583; p1 = 0.00478101; break; }
  case 2:  { p0 = 0.0217164; p1 = 0.00545425; break; }
  case 3:  { p0 = 0.0197547; p1 = 0.00552263; break; }
  case 4:  { p0 = 0.0208778; p1 = 0.00536009; break; }
  case 5:  { p0 = 0.024192; p1 = 0.00521709; break; }
  case 6:  { p0 = 0.0265315; p1 = 0.0051897; break; }
  case 7:  { p0 = 0.0198071; p1 = 0.00566822; break; }
  case 8:  { p0 = 0.0361955; p1 = 0.00486352; break; }
  case 9:  { p0 = 0.037864; p1 = 0.00509094; break; }
  case 10:  { p0 = 0.0382968; p1 = 0.00612354; break; }
  case 11:  { p0 = 0.0308326; p1 = 0.0074234; break; }
  case 12:  { p0 = 0.0248577; p1 = 0.00883049; break; }
  case 13:  { p0 = 0.0279965; p1 = 0.00888293; break; }
  case 14:  { p0 = 0.0372582; p1 = 0.00950252; break; }
  case 15:  { p0 = 0.0281366; p1 = 0.0111501; break; }
  case 16:  { p0 = 0.0421483; p1 = 0.0109413; break; }
  case 17:  { p0 = 0.0461798; p1 = 0.0125824; break; }
  case 18:  { p0 = 0.0530603; p1 = 0.0132638; break; }
  case 19:  { p0 = 0.0601148; p1 = 0.0147911; break; }
  default:  { p0 = 0.0552377; p1 = 0.0155574; break; }
  }
  return p0+p1*sqr(invPt);
}

void L1MuonPixelTrackFitter::param	(	double	eta,
		double &	p1,
		double &	p2,
		double &	p3
	)		`[static, private]`

Definition at line 389 of file L1MuonPixelTrackFitter.cc.

Referenced by getBending(), and valInversePt().

{
  int ieta = int (10*fabs(eta));
  switch (ieta) {
  case 0:  { p1 = -2.68016; p2 = 0; p3 = -12.9653; break; }
  case 1:  { p1 = -2.67864; p2 = 0; p3 = -12.0036; break; }
  case 2:  { p1 = -2.72997; p2 = 0; p3 = -10.3468; break; }
  case 3:  { p1 = -2.68836; p2 = 0; p3 = -12.3369; break; }
  case 4:  { p1 = -2.66885; p2 = 0; p3 = -11.589; break; }
  case 5:  { p1 = -2.64932; p2 = 0; p3 = -12.7176; break; }
  case 6:  { p1 = -2.64513; p2 = 0; p3 = -11.3912; break; }
  case 7:  { p1 = -2.64487; p2 = 0; p3 = -9.83239; break; }
  case 8:  { p1 = -2.58875; p2 = 0; p3 = -10.0541; break; }
  case 9:  { p1 = -2.5551; p2 = 0; p3 = -9.75757; break; }
  case 10:  { p1 = -2.55294; p2 = 0; p3 = -7.25238; break; }
  case 11:  { p1 = -2.45333; p2 = 0; p3 = -7.966; break; }
  case 12:  { p1 = -2.29283; p2 = 0; p3 = -7.03231; break; }
  case 13:  { p1 = -2.13167; p2 = 0; p3 = -4.29182; break; }
  case 14:  { p1 = -1.9102; p2 = 0; p3 = -3.21295; break; }
  case 15:  { p1 = -1.74552; p2 = 0; p3 = -0.531827; break; }
  case 16:  { p1 = -1.53642; p2 = 0; p3 = -1.74057; break; }
  case 17:  { p1 = -1.39446; p2 = 0; p3 = -1.56819; break; }
  case 18:  { p1 = -1.26176; p2 = 0; p3 = -0.598631; break; }
  case 19:  { p1 = -1.14133; p2 = 0; p3 = -0.0941055; break; }
  default:  { p1 = -1.02086; p2 = 0; p3 = -0.100491; break; }
  }
}

reco::Track * L1MuonPixelTrackFitter::run	(	const edm::EventSetup &	es,
		const std::vector< const TrackingRecHit * > &	hits,
		const TrackingRegion &	region
	)		const `[virtual]`

Implements PixelFitter.

Definition at line 34 of file L1MuonPixelTrackFitter.cc.

References DeDxDiscriminatorTools::charge(), ExpressReco_HICollisions_FallBack::chi2, PixelRecoUtilities::curvature(), errCotTheta(), errInversePt(), errPhi(), errTip(), errZip(), eta(), edm::EventSetup::get(), edm::ParameterSet::getParameter(), phi, edm::ESHandle< T >::product(), ExpressReco_HICollisions_FallBack::pt, theConfig, theEtaL1, theHit1, theHit2, thePhiL1, valCotTheta(), valInversePt(), valPhi(), valTip(), and valZip().

Referenced by TSGFromL1Muon::produce().

{
  edm::ESHandle<MagneticField> fieldESH;
  es.get<IdealMagneticFieldRecord>().get(fieldESH);

  double phi_vtx_fromHits = (theHit2-theHit1).phi();

  double invPt    = valInversePt(phi_vtx_fromHits, thePhiL1, theEtaL1);
  double invPtErr = errInversePt(invPt, theEtaL1);

  int charge = (invPt > 0.) ? 1 : -1;
  double  curvature = PixelRecoUtilities::curvature(invPt, es);

  Circle circle(theHit1, theHit2, curvature);

  double valPhi = this->valPhi(circle, charge);
  double valTip = this->valTip(circle, curvature); 
  double valZip = this->valZip(curvature, theHit1,theHit2);
  double valCotTheta = this->valCotTheta(PixelRecoLineRZ(theHit1,theHit2)); 

  static double invPtErrorScale = theConfig.getParameter<double>("invPtErrorScale");
  static double phiErrorScale= theConfig.getParameter<double>("phiErrorScale");
  static double cotThetaErrorScale = theConfig.getParameter<double>("cotThetaErrorScale");
  static double tipErrorScale = theConfig.getParameter<double>("tipErrorScale");
  static double zipErrorScale = theConfig.getParameter<double>("zipErrorScale");

//  if ( (fabs(invPt)-0.1)/invPtErr > 3.) return 0;

  PixelTrackBuilder builder;
  double valPt =  (fabs(invPt) > 1.e-4) ? 1./fabs(invPt) : 1.e4;
  double errPt = invPtErrorScale*invPtErr * valPt*valPt;
  double eta = asinh(valCotTheta);
  double errPhi = this->errPhi(invPt, eta)           * phiErrorScale;
  double errCotTheta = this->errCotTheta(invPt, eta) * cotThetaErrorScale;
  double errTip = this->errTip(invPt, eta)           * tipErrorScale; 
  double errZip = this->errZip(invPt, eta)           * zipErrorScale;
    
  Measurement1D pt(valPt, errPt);
  Measurement1D phi(valPhi, errPhi);
  Measurement1D cotTheta(valCotTheta, errCotTheta);
  Measurement1D tip(valTip, errTip);
  Measurement1D zip(valZip, errZip);

  float chi2 = 0.;

/*
  std::ostringstream str;
    str <<"\t ipt: " << invPt <<"+/-"<<invPtErr
        <<"\t pt:  " << pt.value() <<"+/-"<<pt.error()
        <<"\t phi: " << phi.value() <<"+/-"<<phi.error()
        <<"\t cot: " << cotTheta.value() <<"+/-"<<cotTheta.error()
        <<"\t tip: " << tip.value() <<"+/-"<<tip.error()
        <<"\t zip: " << zip.value() <<"+/-"<<zip.error()
        <<"\t charge: " << charge;
  std::cout <<str.str()<< std::endl;
*/

 
  return  builder.build(pt, phi, cotTheta, tip, zip, chi2, charge, hits, fieldESH.product());
}

void L1MuonPixelTrackFitter::setL1Constraint ( const L1MuGMTCand & muon )

Definition at line 21 of file L1MuonPixelTrackFitter.cc.

References L1MuGMTCand::charge(), L1MuGMTCand::etaValue(), L1MuGMTCand::phiValue(), theChargeL1, theEtaL1, and thePhiL1.

Referenced by TSGFromL1Muon::produce().

{
  thePhiL1 = muon.phiValue()+0.021817;
  theEtaL1 = muon.etaValue();
  theChargeL1 = muon.charge();
}

void L1MuonPixelTrackFitter::setPxConstraint ( const SeedingHitSet & hits )

Definition at line 28 of file L1MuonPixelTrackFitter.cc.

References theHit1.

Referenced by TSGFromL1Muon::produce().

{
  theHit1 = hits[0]->globalPosition();
  theHit1 = hits[1]->globalPosition();
}

double L1MuonPixelTrackFitter::valCotTheta ( const PixelRecoLineRZ & line ) const [private]

Definition at line 140 of file L1MuonPixelTrackFitter.cc.

References PixelRecoLineRZ::cotLine().

Referenced by run().

{
  return line.cotLine();
}

double L1MuonPixelTrackFitter::valInversePt	(	double	phi0,
		double	phiL1,
		double	eta
	)		const `[private]`

Definition at line 271 of file L1MuonPixelTrackFitter.cc.

References funct::D, deltaPhi(), L1TEmulatorMonitor_cff::p, p1, p2, p3, param(), funct::pow(), lumiQueryAPI::q, query::result, mathSSE::sqrt(), and v.

Referenced by run().

{
   double result = 0.;   
   
  // solve equtaion p3*result^3 + p1*result + dphi = 0;
  // where:  result = 1/pt 
  //         dphi = phiL1 - phi0
  // Cardan way is used
  
  double p1,p2,p3;        //parameters p1,p3 are negative by parameter fix in fit!
  param(eta, p1, p2, p3);

  double dphi = deltaPhi(phiL1,phi0);    // phi0-phiL1
  if ( fabs(dphi) < 0.01) {
    result = -dphi/p1; 
  } else {
    double q = dphi/2./p3;
    double p = p1/3./p3;                 // positive
    double D = q*q + p*p*p;              // positive 
    double u = pow(-q+sqrt(D), 1./3.);
    double v = -pow(q+sqrt(D), 1./3.);
    result = u+v;
  }
  return result;
}

double L1MuonPixelTrackFitter::valPhi	(	const Circle &	c,
		int	charge
	)		const `[private]`

Definition at line 97 of file L1MuonPixelTrackFitter.cc.

References L1MuonPixelTrackFitter::Circle::center(), Vector3DBase< T, FrameTag >::cross(), dir, PV3DBase< T, PVType, FrameType >::perp(), PV3DBase< T, PVType, FrameType >::phi(), CosmicsPD_Skims::radius, and zero.

Referenced by run().

{
  Circle::Point zero(0.,0.,0.);
  Circle::Vector center = circle.center()-zero;
  long double radius = center.perp();
  center /= radius;
  Circle::Vector dir = center.cross(-charge*Circle::Vector(0.,0.,1.));
  return dir.phi();
}

double L1MuonPixelTrackFitter::valTip	(	const Circle &	c,
		double	curvature
	)		const `[private]`

Definition at line 179 of file L1MuonPixelTrackFitter.cc.

References L1MuonPixelTrackFitter::Circle::center(), PV3DBase< T, PVType, FrameType >::perp(), CosmicsPD_Skims::radius, and zero.

Referenced by run().

{
  Circle::Point zero(0.,0.,0.);
  Circle::Vector center = circle.center()-zero;
  long double radius = center.perp();
  return radius-1./fabs(curvature);
}

double L1MuonPixelTrackFitter::valZip	(	double	curvature,
		const GlobalPoint &	p0,
		const GlobalPoint &	p1
	)		const `[private]`

Definition at line 220 of file L1MuonPixelTrackFitter.cc.

References PV3DBase< T, PVType, FrameType >::perp(), PV3DBase< T, PVType, FrameType >::perp2(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by run().

{
  //
  // phi = asin(r*rho/2) with asin(x) ~= x+x**3/(2*3)
  //
  double rho3 = curv*curv*curv;
  double r1 = pinner.perp();
  double phi1 = r1*curv/2 + pinner.perp2()*r1*rho3/48.;
  double r2 = pouter.perp();
  double phi2 = r2*curv/2 + pouter.perp2()*r2*rho3/48.;
  double z1 = pinner.z();
  double z2 = pouter.z();

  return z1 - phi1/(phi1-phi2)*(z1-z2);
}