#include <Chi2Strip1DEstimator.h>

Inheritance diagram for Chi2Strip1DEstimator:

Public Member Functions
	Chi2Strip1DEstimator (double maxChi2, double nSigma=3.)

Chi2Strip1DEstimator *	clone () const override

std::pair< bool, double >	estimate (const TrajectoryStateOnSurface &, const TrackingRecHit &) const override

Public Member Functions inherited from Chi2MeasurementEstimatorBase
template<typename... Args>
	Chi2MeasurementEstimatorBase (double maxChi2, double nSigma, float maxDisp, Args &&... args)

	Chi2MeasurementEstimatorBase (double maxChi2, double nSigma=3., float maxDisp=std::numeric_limits< float >::max())

double	chiSquaredCut () const

bool	estimate (const TrajectoryStateOnSurface &ts, const Plane &plane) const final

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

inlineexplicit

Definition at line 16 of file Chi2Strip1DEstimator.h.

16 : Chi2MeasurementEstimatorBase(maxChi2, nSigma) {}

Referenced by clone().

Member Function Documentation

◆ clone()

Chi2Strip1DEstimator* Chi2Strip1DEstimator::clone ( void ) const

inlineoverridevirtual

Implements MeasurementEstimator.

Definition at line 20 of file Chi2Strip1DEstimator.h.

20 { return new Chi2Strip1DEstimator(*this); }

References Chi2Strip1DEstimator().

◆ estimate()

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

overridevirtual

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 8 of file Chi2Strip1DEstimator.cc.

                                                                                    {
   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);
 }

References gen::C, TrajectoryStateOnSurface::localError(), TrajectoryStateOnSurface::localPosition(), visualization-live-secondInstance_cfg::m, LocalTrajectoryError::positionError(), dttmaxenums::R, alignCSCRings::r, ecaldqm::topology(), and cms::cuda::V.