StripCPEfromTrackAngle Class Reference

#include <StripCPEfromTrackAngle.h>

Inheritance diagram for StripCPEfromTrackAngle:

List of all members.

Public Member Functions
StripClusterParameterEstimator::LocalValues	localParameters (const SiStripCluster &, const LocalTrajectoryParameters &) const
StripClusterParameterEstimator::LocalValues	localParameters (const SiStripCluster &, const GeomDetUnit &, const LocalTrajectoryParameters &) const
	StripCPEfromTrackAngle (edm::ParameterSet &conf, const MagneticField &mag, const TrackerGeometry &geom, const SiStripLorentzAngle &lorentz, const SiStripConfObject &confObj, const SiStripLatency &latency)
Private Member Functions
float	stripErrorSquared (const unsigned, const float) const

---

Detailed Description

Definition at line 6 of file StripCPEfromTrackAngle.h.

---

Constructor & Destructor Documentation

StripCPEfromTrackAngle::StripCPEfromTrackAngle	(	edm::ParameterSet &	conf,
		const MagneticField &	mag,
		const TrackerGeometry &	geom,
		const SiStripLorentzAngle &	lorentz,
		const SiStripConfObject &	confObj,
		const SiStripLatency &	latency
	)		[inline]

Definition at line 17 of file StripCPEfromTrackAngle.h.

  : StripCPE(conf, mag, geom, lorentz, confObj, latency ) {}

---

Member Function Documentation

StripClusterParameterEstimator::LocalValues StripCPEfromTrackAngle::localParameters	(	const SiStripCluster &	cluster,
		const LocalTrajectoryParameters &	ltp
	)		const

Definition at line 27 of file StripCPEfromTrackAngle.cc.

References Exception.

                                                                                            {

  throw cms::Exception("deprecatedMethod")<<"this method should never be called anymore";
  return std::make_pair(LocalPoint(),LocalError());
}

StripClusterParameterEstimator::LocalValues StripCPEfromTrackAngle::localParameters	(	const SiStripCluster &	cluster,
		const GeomDetUnit &	det,
		const LocalTrajectoryParameters &	ltp
	)		const [virtual]

Reimplemented from ClusterParameterEstimator< SiStripCluster >.

Definition at line 6 of file StripCPEfromTrackAngle.cc.

References abs, SiStripCluster::amplitudes(), SiStripCluster::barycenter(), StripCPE::Param::coveredStrips(), StripCPE::Param::drift, f, GeomDet::geographicalId(), StripTopology::localError(), StripTopology::localPosition(), StripCPE::Param::maxLength, StripCPE::Param::moduleGeom, LocalTrajectoryParameters::momentum(), MultiGaussianStateTransform::N, AlCaHLTBitMon_ParallelJobs::p, StripCPE::param(), LocalTrajectoryParameters::position(), StripCPE::shift, strip(), stripErrorSquared(), StripCPE::Param::thickness, StripCPE::Param::topology, and LocalTrajectoryParameters::vector().

                                                                                                                    {
  
  StripCPE::Param const & p = param(det.geographicalId());
  
  LocalVector track = ltp.momentum();
  track *= 
    (track.z()<0) ?  std::abs(p.thickness/track.z()) : 
    (track.z()>0) ? -std::abs(p.thickness/track.z()) :  
                         p.maxLength/track.mag() ;

  const unsigned N = cluster.amplitudes().size();
  const float fullProjection = p.coveredStrips( track+p.drift, ltp.position());
  const float uerr2 = stripErrorSquared( N, std::abs(fullProjection) );
  const float strip = cluster.barycenter() -  0.5f*(1.f-shift[p.moduleGeom]) * fullProjection
    + 0.5f*p.coveredStrips(track, ltp.position());
  
  return std::make_pair( p.topology->localPosition(strip, ltp.vector()),
                         p.topology->localError(strip, uerr2, ltp.vector()) );
}

float StripCPEfromTrackAngle::stripErrorSquared	(	const unsigned	N,
		const float	uProj
	)		const [inline, private]

Definition at line 35 of file StripCPEfromTrackAngle.cc.

References funct::exp(), and f.

Referenced by localParameters().

{
  if( (float(N)-uProj) > 3.5f )  
    return float(N*N)/12.f;
  else {
    const float P1=-0.339f;
    const float P2=0.90f;
    const float P3=0.279f;
    const float uerr = P1*uProj*std::exp(-uProj*P2)+P3;
    return uerr*uerr;
  }
}