#include <StripCPEgeometric.h>

Inheritance diagram for StripCPEgeometric:

Classes
class	WrappedCluster

Public Member Functions
StripClusterParameterEstimator::LocalValues	localParameters (const SiStripCluster &, const GeomDetUnit &, const LocalTrajectoryParameters &) const

	StripCPEgeometric (edm::ParameterSet &conf, const MagneticField &mag, const TrackerGeometry &geom, const SiStripLorentzAngle &LorentzAngle, const SiStripBackPlaneCorrection &BackPlaneCorrection, const SiStripConfObject &confObj, const SiStripLatency &latency)

Public Member Functions inherited from StripCPE
LocalVector	driftDirection (const StripGeomDetUnit *det) const

StripClusterParameterEstimator::LocalValues	localParameters (const SiStripCluster &cl, const GeomDetUnit &) const

	StripCPE (edm::ParameterSet &conf, const MagneticField &, const TrackerGeometry &, const SiStripLorentzAngle &, const SiStripBackPlaneCorrection &, const SiStripConfObject &, const SiStripLatency &)

Public Member Functions inherited from StripClusterParameterEstimator
virtual LocalValues	localParameters (const SiStripCluster &cluster, const GeomDetUnit &gd, const TrajectoryStateOnSurface &tsos) const

virtual VLocalValues	localParametersV (const SiStripCluster &cluster, const GeomDetUnit &gd) const

virtual VLocalValues	localParametersV (const SiStripCluster &cluster, const GeomDetUnit &gd, const TrajectoryStateOnSurface &tsos) const

virtual	~StripClusterParameterEstimator ()

Private Member Functions
bool	ambiguousSize (const WrappedCluster &, const stats_t< float > &) const

stats_t< float >	geometric_position (const WrappedCluster &, const stats_t< float > &) const

stats_t< float >	offset_from_firstStrip (const std::vector< stats_t< float > > &, const stats_t< float > &) const

bool	useNMinusOne (const WrappedCluster &, const stats_t< float > &) const

bool	useNPlusOne (const WrappedCluster &, const stats_t< float > &) const

Private Attributes
const float	maybe_noise_threshold

const float	minimum_uncertainty_squared

const float	noise_threshold

const float	scaling_squared

const float	tan_diffusion_angle

const float	thickness_rel_err2

Additional Inherited Members
Public Types inherited from StripClusterParameterEstimator
typedef std::pair< LocalPoint, LocalError >	LocalValues

typedef std::vector< LocalValues >	VLocalValues

Protected Member Functions inherited from StripCPE
Param const &	param (const GeomDetUnit &det) const

Protected Attributes inherited from StripCPE
const SiStripBackPlaneCorrection &	BackPlaneCorrectionMap_

const TrackerGeometry &	geom_

const SiStripLorentzAngle &	LorentzAngleMap_

const MagneticField &	magfield_

const bool	peakMode_

std::vector< float >	xtalk1

std::vector< float >	xtalk2

Detailed Description

Definition at line 7 of file StripCPEgeometric.h.

Constructor & Destructor Documentation

StripCPEgeometric::StripCPEgeometric	(	edm::ParameterSet &	conf,
		const MagneticField &	mag,
		const TrackerGeometry &	geom,
		const SiStripLorentzAngle &	LorentzAngle,
		const SiStripBackPlaneCorrection &	BackPlaneCorrection,
		const SiStripConfObject &	confObj,
		const SiStripLatency &	latency
	)

inline

Definition at line 15 of file StripCPEgeometric.h.

     : StripCPE(conf, mag, geom, LorentzAngle, BackPlaneCorrection, confObj, latency ),
     tan_diffusion_angle(conf.getParameter<double>("TanDiffusionAngle")),    
     thickness_rel_err2(pow(conf.getParameter<double>("ThicknessRelativeUncertainty"), 2)),
     noise_threshold(conf.getParameter<double>("NoiseThreshold")),
     maybe_noise_threshold(conf.getParameter<double>("MaybeNoiseThreshold")),
     scaling_squared(pow(conf.getParameter<double>("UncertaintyScaling"), 2)),
     minimum_uncertainty_squared(pow(conf.getParameter<double>("MinimumUncertainty"),2))
       {}

Member Function Documentation

bool StripCPEgeometric::ambiguousSize	(	const WrappedCluster &	wc,
		const stats_t< float > &	proj
	)		const

inlineprivate

Definition at line 87 of file StripCPEgeometric.cc.

References maybe_noise_threshold, StripCPEgeometric::WrappedCluster::N, and StripCPEgeometric::WrappedCluster::smallerEdgeStrip().

Referenced by offset_from_firstStrip().

 {  return 
      proj() < wc.N-1 && 
      wc.smallerEdgeStrip()()>0 && 
      wc.smallerEdgeStrip().sigmaFrom(0) < maybe_noise_threshold; }

stats_t< float > StripCPEgeometric::geometric_position	(	const WrappedCluster &	wc,
		const stats_t< float > &	proj
	)		const

private

Definition at line 57 of file StripCPEgeometric.cc.

References stats_t< T >::error2(), StripCPEgeometric::WrappedCluster::eta(), StripCPEgeometric::WrappedCluster::middle(), StripCPEgeometric::WrappedCluster::N, funct::pow(), scaling_squared, and x.

Referenced by offset_from_firstStrip().

                                                                                                 {
   const stats_t<float> x = wc.middle()  +  0.5 * proj * wc.eta();
   return wc.N==1 
     ?  stats_t<float>( x(), pow( 1-0.82*proj(), 2 ) / 12 ) 
     :  stats_t<float>( x(), scaling_squared * x.error2() ) ;
 }

StripClusterParameterEstimator::LocalValues StripCPEgeometric::localParameters	(	const SiStripCluster &	cluster,
		const GeomDetUnit &	det,
		const LocalTrajectoryParameters &	ltp
	)		const

virtual

Reimplemented from StripClusterParameterEstimator.

Definition at line 7 of file StripCPEgeometric.cc.

References StripCPE::Param::backplanecorrection, StripCPE::Param::coveredStrips(), StripCPE::Param::drift, stats_t< T >::error2(), SiStripCluster::firstStrip(), stats_t< T >::from_relative_uncertainty2(), StripTopology::localError(), StripTopology::localPitch(), StripTopology::localPosition(), PV3DBase< T, PVType, FrameType >::mag(), bookConverter::max, StripCPE::Param::maxLength, minimum_uncertainty_squared, StripCPE::Param::moduleGeom, LocalTrajectoryParameters::momentum(), offset_from_firstStrip(), AlCaHLTBitMon_ParallelJobs::p, StripCPE::param(), StripCPE::Param::pitch_rel_err2, LocalTrajectoryParameters::position(), tan_diffusion_angle, StripCPE::Param::thickness, thickness_rel_err2, StripCPE::Param::topology, reco::InverseCrosstalkMatrix::unfold(), LocalTrajectoryParameters::vector(), StripCPE::xtalk1, and PV3DBase< T, PVType, FrameType >::z().

                                                                                                                     {
   StripCPE::Param const& p = param(det);
 
   const LocalPoint& pos = ltp.position();
   LocalVector track = ltp.momentum();
   track *=  (track.z()<0) ?  fabs(p.thickness/track.z()) : 
             (track.z()>0) ? -fabs(p.thickness/track.z()) :  
                              p.maxLength/track.mag() ;
 
   const float fullProjection = p.coveredStrips( track+p.drift, pos );
   stats_t<float> projection;
   {
     const float absProj = fabs( fullProjection );
     const float minProj = 2*p.thickness*tan_diffusion_angle/p.topology->localPitch(pos);
     const float projection_rel_err2 = thickness_rel_err2 + p.pitch_rel_err2;
     projection = stats_t<float>::from_relative_uncertainty2( std::max(absProj, minProj), projection_rel_err2);
   }
 
   const std::vector<stats_t<float> > Q = reco::InverseCrosstalkMatrix::unfold( cluster, xtalk1[p.moduleGeom] );
   const stats_t<float> strip = cluster.firstStrip() + offset_from_firstStrip( Q, projection );
 
   const float corrected = strip() -  0.5*(1-p.backplanecorrection) * fullProjection
     + 0.5*p.coveredStrips(track, ltp.position());
   const float error2 = std::max( strip.error2(), minimum_uncertainty_squared );  
 
   return std::make_pair( p.topology->localPosition( corrected, ltp.vector()),
              p.topology->localError( corrected, error2, ltp.vector()));
 }

stats_t< float > StripCPEgeometric::offset_from_firstStrip	(	const std::vector< stats_t< float > > &	Q,
		const stats_t< float > &	proj
	)		const

private

Definition at line 38 of file StripCPEgeometric.cc.

References StripCPEgeometric::WrappedCluster::addSuppressedEdgeStrip(), ambiguousSize(), StripCPEgeometric::WrappedCluster::centroid(), StripCPEgeometric::WrappedCluster::deformed(), StripCPEgeometric::WrappedCluster::dropSmallerEdgeStrip(), stats_t< T >::error2(), geometric_position(), bookConverter::max, StripCPEgeometric::WrappedCluster::maxProjection(), StripCPEgeometric::WrappedCluster::middle(), StripCPEgeometric::WrappedCluster::N, funct::pow(), useNMinusOne(), and useNPlusOne().

Referenced by localParameters().

                                                                                                {
   WrappedCluster wc(Q);
   if(    useNPlusOne( wc, proj))  wc.addSuppressedEdgeStrip();  else 
   while( useNMinusOne( wc, proj)) wc.dropSmallerEdgeStrip();
 
   if( proj() < wc.N-2 )           return stats_t<float>( wc.middle(),  pow(wc.N-proj(),2) / 12.);
   if( wc.deformed()   )           return stats_t<float>( wc.centroid()(),               1 / 12.);
   if( proj > wc.maxProjection() ) return stats_t<float>( wc.centroid()(),               1 / 12.);
 
   if( ambiguousSize( wc, proj) ) {
     const stats_t<float> probably = geometric_position( wc, proj);
     wc.dropSmallerEdgeStrip();
     const stats_t<float> maybe = geometric_position( wc, proj);
     return stats_t<float>( probably(), std::max( probably.error2(), float(maybe.error2() + pow( probably()-maybe() ,2)/12 )) );
   }
   return geometric_position( wc, proj);
 }

bool StripCPEgeometric::useNMinusOne	(	const WrappedCluster &	wc,
		const stats_t< float > &	proj
	)		const

inlineprivate

Definition at line 71 of file StripCPEgeometric.cc.

References StripCPEgeometric::WrappedCluster::dropSmallerEdgeStrip(), StripCPEgeometric::WrappedCluster::eta(), StripCPEgeometric::WrappedCluster::maxProjection(), StripCPEgeometric::WrappedCluster::N, noise_threshold, StripCPEgeometric::WrappedCluster::sign(), and StripCPEgeometric::WrappedCluster::smallerEdgeStrip().

Referenced by offset_from_firstStrip().

                                                                          {
   if( proj() > wc.N-1) return false;
   if( wc.smallerEdgeStrip() < 0 ) return true;
   if( proj() < wc.N-3) return false;
   if( proj() < wc.N-2) return true;
   if( wc.eta().sigmaFrom(0) < 3) return false;
 
   WrappedCluster wcTest(wc); wcTest.dropSmallerEdgeStrip();
   if( proj >= wcTest.maxProjection() ) return false;
   if( wc.sign()*wc.eta()() > 1./(wc.N-1) ) return true;
 
   return wc.smallerEdgeStrip().sigmaFrom(0) < noise_threshold;
 }