#include <ThirdHitCorrection.h>

Public Types
typedef PixelRecoRange< float >	Range
Public Member Functions
void	correctRPhiRange (Range &range) const
void	correctRZRange (Range &range) const
void	init (const edm::EventSetup &es, float pt, const DetLayer *layer, const PixelRecoLineRZ &line, const PixelRecoPointRZ &constraint, bool useMultipleScattering, bool useBendingCorrection=false)
	ThirdHitCorrection (const edm::EventSetup &es, float pt, const DetLayer *layer, const PixelRecoLineRZ &line, const PixelRecoPointRZ &constraint, bool useMultipleScattering, bool useBendingCorrection=false)
	ThirdHitCorrection ()
	~ThirdHitCorrection ()
Private Attributes
bool	theBarrel
pixelrecoutilities::LongitudinalBendingCorrection	theBendingCorrection
PixelRecoLineRZ	theLine
float	theMScoeff
float	theMultScattCorrRPhi
bool	theUseBendingCorrection
bool	theUseMultipleScattering

Detailed Description

Definition at line 13 of file ThirdHitCorrection.h.

Member Typedef Documentation

typedef PixelRecoRange<float> ThirdHitCorrection::Range

Definition at line 16 of file ThirdHitCorrection.h.

Constructor & Destructor Documentation

ThirdHitCorrection::ThirdHitCorrection ( ) [inline]

Definition at line 18 of file ThirdHitCorrection.h.

{}

ThirdHitCorrection::ThirdHitCorrection	(	const edm::EventSetup &	es,
		float	pt,
		const DetLayer *	layer,
		const PixelRecoLineRZ &	line,
		const PixelRecoPointRZ &	constraint,
		bool	useMultipleScattering,
		bool	useBendingCorrection = `false`
	)		`[inline]`

Definition at line 20 of file ThirdHitCorrection.h.

References init().

  { 
    init(es, pt, layer, line, constraint, useMultipleScattering, useBendingCorrection);
  }

ThirdHitCorrection::~ThirdHitCorrection ( ) [inline]

Definition at line 42 of file ThirdHitCorrection.h.

{}

Member Function Documentation

void ThirdHitCorrection::correctRPhiRange ( Range & range ) const

Definition at line 56 of file ThirdHitCorrection.cc.

{
  if (theUseMultipleScattering) {
    range.first -= theMultScattCorrRPhi;
    range.second += theMultScattCorrRPhi;
  }
}

void ThirdHitCorrection::correctRZRange ( Range & range ) const

Definition at line 63 of file ThirdHitCorrection.cc.

References abs, corr, PixelRecoRange< T >::max(), PixelRecoRange< T >::min(), and CosmicsPD_Skims::radius.

{ 
  if (theUseMultipleScattering) {
    range.first -= theMScoeff;
    range.second += theMScoeff;
  } 

  if (theUseBendingCorrection) {
    if (theBarrel) {
      float cotTheta = theLine.cotLine();
      if (cotTheta > 0) {
        float radius = theLine.rAtZ(range.max());
        float corr = theBendingCorrection(radius) * cotTheta;
        range.second +=  corr;
      } else {
        float radius = theLine.rAtZ(range.min());
        float corr = theBendingCorrection(radius) * std::abs(cotTheta);
        range.first -=  corr;
      }
    } 
    else {
      float radius = range.max();
      float corr = theBendingCorrection(radius);
      range.first -= corr;
    }
  }
}

void ThirdHitCorrection::init	(	const edm::EventSetup &	es,
		float	pt,
		const DetLayer *	layer,
		const PixelRecoLineRZ &	line,
		const PixelRecoPointRZ &	constraint,
		bool	useMultipleScattering,
		bool	useBendingCorrection = `false`
	)

Definition at line 19 of file ThirdHitCorrection.cc.

References abs, Reference_intrackfit_cff::barrel, PixelRecoLineRZ::cotLine(), alignCSCRings::e, f, geometryCSVtoXML::line, DetLayer::location(), funct::sqr(), and mathSSE::sqrt().

Referenced by ThirdHitCorrection().

                                                    {

  theUseMultipleScattering = useMultipleScattering;
  theUseBendingCorrection = useBendingCorrection;
  theLine = line;
  theMultScattCorrRPhi =0;
  theMScoeff=0;

  if (!theUseMultipleScattering && !theUseBendingCorrection) return;

  theBarrel = (layer->location() == GeomDetEnumerators::barrel);

  if (theUseMultipleScattering) {
    MultipleScatteringParametrisation sigmaRPhi(layer, es);
    theMultScattCorrRPhi = 3.f*sigmaRPhi(pt, line.cotLine(), constraint);
    float overSinTheta = std::sqrt(1.f+sqr(line.cotLine()));
    if (theBarrel) {
      theMScoeff =  theMultScattCorrRPhi*overSinTheta; 
    } else {
      float overCosTheta = std::abs(line.cotLine()) < 1.e-4f ? 
          1.e4f : overSinTheta/std::abs(line.cotLine());
      theMScoeff =  theMultScattCorrRPhi*overCosTheta;
      
    }
  }

  if (useBendingCorrection)  theBendingCorrection.init(pt,es);

}