PixelRecoUtilities Namespace Reference

Functions
template<typename T >
T	bendingRadius (T pt, const MagneticField &field)
template<typename T >
T	curvature (T InversePt, const MagneticField &field)
template<typename T >
T	inversePt (T curvature, const MagneticField &field)
double	longitudinalBendingCorrection (double radius, double pt, const MagneticField &field)

Detailed Description

Small utility funcions used during seed generation

Function Documentation

template<typename T >

T PixelRecoUtilities::bendingRadius	(	T	pt,
		const MagneticField &	field
	)

gives bending radius in magnetic field, pT in GeV, magnetic field taken at (0,0,0)

Definition at line 15 of file PixelRecoUtilities.h.

References MagneticField::inverseBzAtOriginInGeV().

Referenced by HitPairGeneratorFromLayerPairForPhotonConversion::getPhiRange(), InnerDeltaPhi::InnerDeltaPhi(), and longitudinalBendingCorrection().

                                                    {
    return pt * field.inverseBzAtOriginInGeV();
  }

template<typename T >

T PixelRecoUtilities::curvature	(	T	InversePt,
		const MagneticField &	field
	)

gives transverse curvature (=1/radius of curvature) in magnetic field, pT in GeV, magnetic field taken at (0,0,0)

Definition at line 23 of file PixelRecoUtilities.h.

References MagneticField::inverseBzAtOriginInGeV().

Referenced by VectorHitBuilderAlgorithm::curvatureANDphi(), CAHitTripletGenerator::QuantityDependsPt::evaluator(), CAHitQuadrupletGenerator::QuantityDependsPt::evaluator(), ClusterShapeTrackFilter::getGlobalDirs(), CAHitTripletGenerator::hitNtuplets(), CAHitQuadrupletGenerator::hitNtuplets(), MultiHitGeneratorFromChi2::hitSets(), PixelTripletNoTipGenerator::hitTriplets(), PixelTripletHLTGenerator::hitTriplets(), PixelTripletLargeTipGenerator::hitTriplets(), ThirdHitPrediction::isCompatibleWithMultipleScattering(), OutInConversionSeedFinder::makeTrackState(), PathToPlane2Order::operator()(), RectangularEtaPhiTrackingRegion::phiWindow(), pTFrom2Stubs::rInvFrom2(), PixelFitterByHelixProjections::run(), TrackFitter::run(), L1MuonPixelTrackFitter::run(), and GflashTrajectory::setCurvature().

                                                       {
    return InversePt / field.inverseBzAtOriginInGeV();
  }

template<typename T >

T PixelRecoUtilities::inversePt	(	T	curvature,
		const MagneticField &	field
	)

inverse pt from curvature

Definition at line 29 of file PixelRecoUtilities.h.

References MagneticField::inverseBzAtOriginInGeV().

Referenced by CAHitTripletGenerator::hitNtuplets(), CAHitQuadrupletGenerator::hitNtuplets(), PixelTripletNoTipGenerator::hitTriplets(), PixelFitterByHelixProjections::run(), PixelFitterByConformalMappingAndLine::run(), TrackFitter::run(), and KFBasedPixelFitter::run().

                                                       {
    return curvature * field.inverseBzAtOriginInGeV();
  }

double PixelRecoUtilities::longitudinalBendingCorrection ( double  radius, double  pt, const MagneticField &  field  )

inline

distance between stright line propagation and helix r_stright_line = radius+longitudinalBendingCorrection(radius,pt)

Definition at line 36 of file PixelRecoUtilities.h.

References bendingRadius().

Referenced by RectangularEtaPhiTrackingRegion::estimator().

                                                                                                    {
    double invCurv = bendingRadius(pt, field);
    if (invCurv == 0.)
      return 0.;
    return radius / 6. * radius * radius / (2. * invCurv * 2. * invCurv);
  }