ConversionTrackEcalImpactPoint Class Reference

#include <ConversionTrackEcalImpactPoint.h>

List of all members.

Public Member Functions
	ConversionTrackEcalImpactPoint (const MagneticField *field)
std::vector< math::XYZPointF >	find (const std::vector< reco::TransientTrack > &tracks, const edm::Handle< edm::View< reco::CaloCluster > > &bcHandle)
std::vector< reco::CaloClusterPtr >	matchingBC () const
void	setMagneticField (const MagneticField *mf)
	~ConversionTrackEcalImpactPoint ()
Static Private Member Functions
static const BoundCylinder &	barrel ()
static float	barrelHalfLength ()
static float	barrelRadius ()
static void	check ()
static float	endcapRadius ()
static float	endcapZ ()
static void	initialize ()
static const BoundDisk &	negativeEtaEndcap ()
static const BoundDisk &	positiveEtaEndcap ()
Private Attributes
PropagationDirection	dir_
PropagatorWithMaterial *	forwardPropagator_
std::vector< reco::CaloClusterPtr >	matchingBC_
TrajectoryStateOnSurface	stateAtECAL_
const MagneticField *	theMF_
Static Private Attributes
static ReferenceCountingPointer < BoundCylinder >	theBarrel_ = 0
static bool	theInit_ = false
static ReferenceCountingPointer < BoundDisk >	theNegativeEtaEndcap_ = 0
static ReferenceCountingPointer < BoundDisk >	thePositiveEtaEndcap_ = 0

---

Detailed Description

Author:

N. Marinelli - Univ. of Notre Dame

Version:

Definition at line 39 of file ConversionTrackEcalImpactPoint.h.

---

Constructor & Destructor Documentation

ConversionTrackEcalImpactPoint::ConversionTrackEcalImpactPoint

(

const MagneticField *

field

)

Definition at line 27 of file ConversionTrackEcalImpactPoint.cc.

References alongMomentum, dir_, forwardPropagator_, and theMF_.

                                                                                         : 

theMF_(field)
{ 

    forwardPropagator_ = new PropagatorWithMaterial ( dir_ = alongMomentum, 0.000511, theMF_ );

}

ConversionTrackEcalImpactPoint::~ConversionTrackEcalImpactPoint

(

)

Definition at line 36 of file ConversionTrackEcalImpactPoint.cc.

References forwardPropagator_.

                                                                {

    delete    forwardPropagator_ ; 
    
}

---

Member Function Documentation

static const BoundCylinder& ConversionTrackEcalImpactPoint::barrel

(

)

[inline, static, private]

Definition at line 86 of file ConversionTrackEcalImpactPoint.h.

References check(), and theBarrel_.

Referenced by find().

{ check(); return *theBarrel_;}

static float ConversionTrackEcalImpactPoint::barrelHalfLength

(

)

[inline, static, private]

Definition at line 72 of file ConversionTrackEcalImpactPoint.h.

Referenced by initialize().

{return 270.9f;} //p81, p50, ECAL TDR

static float ConversionTrackEcalImpactPoint::barrelRadius

(

)

[inline, static, private]

Hard-wired numbers defining the surfaces on which the crystal front faces lie.

Definition at line 71 of file ConversionTrackEcalImpactPoint.h.

Referenced by initialize().

{return 129.f;} //p81, p50, ECAL TDR

static void ConversionTrackEcalImpactPoint::check

(

void

)

[inline, static, private]

Definition at line 77 of file ConversionTrackEcalImpactPoint.h.

References initialize(), and theInit_.

Referenced by barrel(), negativeEtaEndcap(), and positiveEtaEndcap().

{if (!theInit_) initialize();}

static float ConversionTrackEcalImpactPoint::endcapRadius

(

)

[inline, static, private]

Definition at line 73 of file ConversionTrackEcalImpactPoint.h.

Referenced by initialize().

{return 171.1f;} // fig 3.26, p81, ECAL TDR

static float ConversionTrackEcalImpactPoint::endcapZ

(

)

[inline, static, private]

Definition at line 74 of file ConversionTrackEcalImpactPoint.h.

Referenced by initialize().

{return 320.5f;} // fig 3.26, p81, ECAL TDR

std::vector< math::XYZPointF > ConversionTrackEcalImpactPoint::find	(	const std::vector< reco::TransientTrack > &	tracks,
		const edm::Handle< edm::View< reco::CaloCluster > > &	bcHandle
	)

Definition at line 42 of file ConversionTrackEcalImpactPoint.cc.

References barrel(), dPhi(), PV3DBase< T, PVType, FrameType >::eta(), forwardPropagator_, TrajectoryStateOnSurface::globalPosition(), i, TrajectoryStateOnSurface::isValid(), matchingBC(), matchingBC_, negativeEtaEndcap(), positiveEtaEndcap(), PropagatorWithMaterial::propagate(), query::result, mathSSE::sqrt(), and stateAtECAL_.

Referenced by ConvertedPhotonProducer::buildCollections().

                                                                                                                                                                      {

  
  std::vector<math::XYZPointF> result;
  // 
  matchingBC_.clear();   

  std::vector<reco::CaloClusterPtr> matchingBC(2);


  // 



  int iTrk=0;
  for (    std::vector<reco::TransientTrack>::const_iterator iTk=tracks.begin(); iTk!=tracks.end(); ++iTk) {

    math::XYZPointF ecalImpactPosition(0.,0.,0.);
    const TrajectoryStateOnSurface myTSOS=(*iTk).innermostMeasurementState();
    if ( !( myTSOS.isValid() ) ) continue; 

    stateAtECAL_= forwardPropagator_->propagate( myTSOS, barrel() );
    

    if (!stateAtECAL_.isValid() || ( stateAtECAL_.isValid() && fabs(stateAtECAL_.globalPosition().eta() ) >1.479 )  ) {
    
         
      if ( (*iTk).innermostMeasurementState().globalPosition().eta() > 0.) {
        stateAtECAL_= forwardPropagator_->propagate( myTSOS, positiveEtaEndcap());

      } else {

        stateAtECAL_= forwardPropagator_->propagate( myTSOS, negativeEtaEndcap());

      }
    }


    if ( stateAtECAL_.isValid() ) ecalImpactPosition = stateAtECAL_.globalPosition();


    result.push_back(ecalImpactPosition  );


    if ( stateAtECAL_.isValid() ) { 
      int goodBC=0;
      float bcDistanceToTrack=9999;
      reco::CaloClusterPtr matchedBCItr;
      int ibc=0;
      goodBC=0;

      for (unsigned i = 0; i < bcHandle->size(); ++i ) {
        float dEta= bcHandle->ptrAt(i)->position().eta() - ecalImpactPosition.eta()  ;
        float dPhi= bcHandle->ptrAt(i)->position().phi() - ecalImpactPosition.phi()  ;
        if ( sqrt(dEta*dEta + dPhi*dPhi)  <  bcDistanceToTrack ) {
          goodBC=ibc;
          bcDistanceToTrack=sqrt(dEta*dEta + dPhi*dPhi);
        } 
        ibc++;  

      }

      matchingBC[iTrk]=bcHandle->ptrAt(goodBC);
    }
       
     
    iTrk++;
  }

  matchingBC_=matchingBC;

  return result;

}

void ConversionTrackEcalImpactPoint::initialize

(

)

[static, private]

Definition at line 120 of file ConversionTrackEcalImpactPoint.cc.

References barrelHalfLength(), barrelRadius(), endcapRadius(), endcapZ(), epsilon, theBarrel_, theInit_, theNegativeEtaEndcap_, and thePositiveEtaEndcap_.

Referenced by check().

                                                {

  const float epsilon = 0.001;
  Surface::RotationType rot; // unit rotation matrix


  theBarrel_ = new BoundCylinder( Surface::PositionType(0,0,0), rot, 
                                 SimpleCylinderBounds( barrelRadius()-epsilon, 
                                                       barrelRadius()+epsilon, 
                                                       -barrelHalfLength(), 
                                                       barrelHalfLength()));
  theNegativeEtaEndcap_ = 
    new BoundDisk( Surface::PositionType( 0, 0, -endcapZ()), rot, 
                   SimpleDiskBounds( 0, endcapRadius(), -epsilon, epsilon));
  
  thePositiveEtaEndcap_ = 
    new BoundDisk( Surface::PositionType( 0, 0, endcapZ()), rot, 
                   SimpleDiskBounds( 0, endcapRadius(), -epsilon, epsilon));
  
  theInit_ = true;


}

std::vector<reco::CaloClusterPtr> ConversionTrackEcalImpactPoint::matchingBC

(

)

const [inline]

Definition at line 51 of file ConversionTrackEcalImpactPoint.h.

References matchingBC_.

Referenced by ConvertedPhotonProducer::buildCollections(), and find().

{return matchingBC_;}

static const BoundDisk& ConversionTrackEcalImpactPoint::negativeEtaEndcap

(

)

[inline, static, private]

Definition at line 87 of file ConversionTrackEcalImpactPoint.h.

References check(), and theNegativeEtaEndcap_.

Referenced by find().

{ check(); return *theNegativeEtaEndcap_;}

static const BoundDisk& ConversionTrackEcalImpactPoint::positiveEtaEndcap

(

)

[inline, static, private]

Definition at line 88 of file ConversionTrackEcalImpactPoint.h.

References check(), and thePositiveEtaEndcap_.

Referenced by find().

{ check(); return *thePositiveEtaEndcap_;}

void ConversionTrackEcalImpactPoint::setMagneticField

(

const MagneticField *

mf

)

[inline]

Definition at line 52 of file ConversionTrackEcalImpactPoint.h.

References theMF_.

{ theMF_=mf;}

---

Member Data Documentation

PropagationDirection ConversionTrackEcalImpactPoint::dir_ [private]

Definition at line 65 of file ConversionTrackEcalImpactPoint.h.

Referenced by ConversionTrackEcalImpactPoint().

PropagatorWithMaterial* ConversionTrackEcalImpactPoint::forwardPropagator_ [mutable, private]

Definition at line 64 of file ConversionTrackEcalImpactPoint.h.

Referenced by ConversionTrackEcalImpactPoint(), find(), and ~ConversionTrackEcalImpactPoint().

std::vector<reco::CaloClusterPtr> ConversionTrackEcalImpactPoint::matchingBC_ [private]

Definition at line 66 of file ConversionTrackEcalImpactPoint.h.

Referenced by find(), and matchingBC().

TrajectoryStateOnSurface ConversionTrackEcalImpactPoint::stateAtECAL_ [private]

Definition at line 62 of file ConversionTrackEcalImpactPoint.h.

Referenced by find().

ReferenceCountingPointer< BoundCylinder > ConversionTrackEcalImpactPoint::theBarrel_ = 0 [static, private]

Definition at line 82 of file ConversionTrackEcalImpactPoint.h.

Referenced by barrel(), and initialize().

bool ConversionTrackEcalImpactPoint::theInit_ = false [static, private]

Definition at line 89 of file ConversionTrackEcalImpactPoint.h.

Referenced by check(), and initialize().

const MagneticField* ConversionTrackEcalImpactPoint::theMF_ [private]

Definition at line 60 of file ConversionTrackEcalImpactPoint.h.

Referenced by ConversionTrackEcalImpactPoint(), and setMagneticField().

ReferenceCountingPointer< BoundDisk > ConversionTrackEcalImpactPoint::theNegativeEtaEndcap_ = 0 [static, private]

Definition at line 83 of file ConversionTrackEcalImpactPoint.h.

Referenced by initialize(), and negativeEtaEndcap().

ReferenceCountingPointer< BoundDisk > ConversionTrackEcalImpactPoint::thePositiveEtaEndcap_ = 0 [static, private]

Definition at line 84 of file ConversionTrackEcalImpactPoint.h.

Referenced by initialize(), and positiveEtaEndcap().