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KalmanSmoothedVertexChi2Estimator< N > Class Template Reference

Class to calculate the smoothed chi**2 of the vertex using the Kalman filter algorithms after the vertex has been fit and the tracks refit. More...

#include <RecoVertex/KalmanVertexFit/interface/KalmanSmoothedVertexChi2Estimator.h>

Inheritance diagram for KalmanSmoothedVertexChi2Estimator< N >:

List of all members.

Public Member Functions
KalmanSmoothedVertexChi2Estimator *	clone () const
float	estimate (const CachingVertex< N > &vertex) const
	Methode which calculates the smoothed vertex chi**2.
virtual	~KalmanSmoothedVertexChi2Estimator ()
Private Attributes
KVFHelper< N >	helper

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Detailed Description

template<unsigned int N>
class KalmanSmoothedVertexChi2Estimator< N >

Class to calculate the smoothed chi**2 of the vertex using the Kalman filter algorithms after the vertex has been fit and the tracks refit.

Definition at line 14 of file KalmanSmoothedVertexChi2Estimator.h.

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Constructor & Destructor Documentation

template<unsigned int N>

virtual KalmanSmoothedVertexChi2Estimator< N >::~KalmanSmoothedVertexChi2Estimator

(

)

[inline, virtual]

Definition at line 18 of file KalmanSmoothedVertexChi2Estimator.h.

{}

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Member Function Documentation

template<unsigned int N>

KalmanSmoothedVertexChi2Estimator* KalmanSmoothedVertexChi2Estimator< N >::clone

(

void

)

const [inline, virtual]

Implements VertexSmoothedChiSquaredEstimator< N >.

Definition at line 27 of file KalmanSmoothedVertexChi2Estimator.h.

  {
   return new KalmanSmoothedVertexChi2Estimator(* this);
  }

template<unsigned int N>

float KalmanSmoothedVertexChi2Estimator< N >::estimate

(

const CachingVertex< N > &

vertex

)

const [inline, virtual]

Methode which calculates the smoothed vertex chi**2.

Parameters:

vertex

is the final estimate of the vertex, with the refited tracks

Returns:

the smoothed vertex chi**2

Implements VertexSmoothedChiSquaredEstimator< N >.

Definition at line 6 of file KalmanSmoothedVertexChi2Estimator.cc.

References CachingVertex< N >::hasPrior(), KalmanSmoothedVertexChi2Estimator< N >::helper, i, CachingVertex< N >::priorVertexState(), sum(), CachingVertex< N >::tracks(), tracks, and CachingVertex< N >::vertexState().

{
//initial vertex part
  float v_part = 0.;
  float returnChi = 0.;
  
  if (vertex.hasPrior()) {
    v_part = helper.vertexChi2(vertex.priorVertexState(), vertex.vertexState());
  }
 
//vector of tracks part
  typedef typename CachingVertex<N>::RefCountedVertexTrack RefCountedVertexTrack;
  vector< RefCountedVertexTrack > tracks = vertex.tracks();
  float sum = 0.;
  for(typename vector<RefCountedVertexTrack>::iterator i = tracks.begin(); i != tracks.end(); i++)
  {
   sum += (*i)->weight() * helper.trackParameterChi2((*i)->linearizedTrack(), (*i)->refittedState());
  }
 returnChi = v_part + sum;
 return returnChi;   
}

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Member Data Documentation

template<unsigned int N>

KVFHelper<N> KalmanSmoothedVertexChi2Estimator< N >::helper [private]

Definition at line 34 of file KalmanSmoothedVertexChi2Estimator.h.

Referenced by KalmanSmoothedVertexChi2Estimator< N >::estimate().

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The documentation for this class was generated from the following files:

• RecoVertex/KalmanVertexFit/interface/KalmanSmoothedVertexChi2Estimator.h
• RecoVertex/KalmanVertexFit/src/KalmanSmoothedVertexChi2Estimator.cc

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