Chi2Strip1DEstimator Class Reference

#include <Chi2Strip1DEstimator.h>

Inheritance diagram for Chi2Strip1DEstimator:

Public Member Functions
	Chi2Strip1DEstimator (double maxChi2, double nSigma=3.)
virtual Chi2Strip1DEstimator *	clone () const
virtual std::pair< bool, double >	estimate (const TrajectoryStateOnSurface &, const TrackingRecHit &) const
Public Member Functions inherited from Chi2MeasurementEstimatorBase
	Chi2MeasurementEstimatorBase (double maxChi2, double nSigma=3., float maxDisp=std::numeric_limits< float >::max())
template<typename... Args>
	Chi2MeasurementEstimatorBase (double maxChi2, double nSigma, float maxDisp, Args &&...args)
double	chiSquaredCut () const
virtual bool	estimate (const TrajectoryStateOnSurface &ts, const Plane &plane) const final
virtual Local2DVector	maximalLocalDisplacement (const TrajectoryStateOnSurface &ts, const Plane &plane) const final
double	nSigmaCut () const
Public Member Functions inherited from MeasurementEstimator
float	maxSagitta () const
	MeasurementEstimator ()
	MeasurementEstimator (float maxSag, float minToll, float mpt)
float	minPt2ForHitRecoveryInGluedDet () const
float	minTolerance2 () const
virtual bool	preFilter (const TrajectoryStateOnSurface &, OpaquePayload const &) const
virtual	~MeasurementEstimator ()

Additional Inherited Members
Public Types inherited from MeasurementEstimator
using	HitReturnType = std::pair< bool, double >
using	Local2DVector = Vector2DBase< float, LocalTag >
using	SurfaceReturnType = bool
Protected Member Functions inherited from Chi2MeasurementEstimatorBase
std::pair< bool, double >	returnIt (double est) const

Detailed Description

A Chi2 MeasurementEstimator that only uses the X coordinate in the measurement frame (the one perpendicular to the strip). Ported from ORCA.

Author

todorov, cerati

Definition at line 14 of file Chi2Strip1DEstimator.h.

Constructor & Destructor Documentation

Chi2Strip1DEstimator::Chi2Strip1DEstimator ( double  maxChi2, double  nSigma = 3.  )

inlineexplicit

Definition at line 18 of file Chi2Strip1DEstimator.h.

References estimate().

Referenced by clone().

                                                                    : 
    Chi2MeasurementEstimatorBase( maxChi2, nSigma) {}

Member Function Documentation

virtual Chi2Strip1DEstimator* Chi2Strip1DEstimator::clone ( void  ) const

inlinevirtual

Implements MeasurementEstimator.

Definition at line 24 of file Chi2Strip1DEstimator.h.

References Chi2Strip1DEstimator().

                                              {
    return new Chi2Strip1DEstimator(*this);
  }

pair< bool, double > Chi2Strip1DEstimator::estimate ( const TrajectoryStateOnSurface &  ts, const TrackingRecHit &  hit  ) const

virtual

Returns pair( true, value) if the TrajectoryStateOnSurface is compatible with the RecHit, and pair( false, value) if it is not compatible. The TrajectoryStateOnSurface must be on the same Surface as the RecHit. For an estimator where there is no value computed, e.g. fixed window estimator, only the first(bool) part is of interest.

Implements Chi2MeasurementEstimatorBase.

Definition at line 9 of file Chi2Strip1DEstimator.cc.

References patCaloMETCorrections_cff::C, TrackingRecHit::detUnit(), GeomDetType::isTrackerPixel(), TrajectoryStateOnSurface::localError(), TrajectoryStateOnSurface::localPosition(), TrackingRecHit::localPosition(), TrackingRecHit::localPositionError(), funct::m, Topology::measurementError(), Topology::measurementPosition(), LocalTrajectoryError::positionError(), dttmaxenums::R, alignCSCRings::r, GeomDet::topology(), ecaldqm::topology(), GeomDet::type(), and x().

Referenced by Chi2Strip1DEstimator().

                                                    {

  if(//hit.isMatched() || 
     hit.detUnit()->type().isTrackerPixel() 
     ) return HitReturnType(false,0.);
  
 
  const StripTopology* topology = 
    dynamic_cast<const StripTopology*>(&(hit.detUnit()->topology())); 
  
  double m = topology->measurementPosition(hit.localPosition()).x();
  
  double x = topology->measurementPosition(state.localPosition()).x();
  
  double V =
    topology->measurementError(hit.localPosition(),
                   hit.localPositionError()).uu();
  double C = 
    topology->measurementError(state.localPosition(),
                   state.localError().positionError()).uu();
  double r = m - x;
  double R = V + C;

  double est = r*r/R;

  return returnIt(est);
}