#include <PhysicsTools/IsolationUtils/src/FixedAreaIsolationCone.cc>

Public Member Functions
	FixedAreaIsolationCone ()
double	operator() (double coneAxisTheta, double coneAxisPhi, double openingAngleSignalCone, double areaIsolationCone, int &error)
void	setAcceptanceLimit (double etaMaxTrackingAcceptance)
	~FixedAreaIsolationCone ()
Private Attributes
ConeAreaFunction	areaFunctionSignalCone_
ROOT::Math::RootFinder	areaRootFinderIsolationCone_
ConeAreaRootFunction	areaRootFunctionIsolationCone_
Static Private Attributes
static const unsigned int	debugLevel_ = 0

Detailed Description

Description: highest level class to compute size of isolation cone such that area weighted by particle density (proportional to dEta/dTheta = 1/sin(theta)) is constant

Implementation: imported into CMSSW on 05/18/2007

Definition at line 38 of file FixedAreaIsolationCone.h.

Constructor & Destructor Documentation

FixedAreaIsolationCone::FixedAreaIsolationCone ( )

Definition at line 34 of file FixedAreaIsolationCone.cc.

  : areaFunctionSignalCone_(), areaRootFunctionIsolationCone_()
{
//--- nothing to be done yet
//
//    WARNING: do NOT call ROOT::Math::RootFinder<ROOT::Math::Roots::Brent>::SetFunction here;
//             this will cause the function to be evaluated before all function parameters are set,
//             leading to an error message first and erroneous behaviour of the root-finding later on !!!
//
}

FixedAreaIsolationCone::~FixedAreaIsolationCone ( )

Definition at line 45 of file FixedAreaIsolationCone.cc.

{
//--- nothing to be done yet
}

Member Function Documentation

double FixedAreaIsolationCone::operator()	(	double	coneAxisTheta,
		double	coneAxisPhi,
		double	openingAngleSignalCone,
		double	areaIsolationCone,
		int &	error
	)

Definition at line 56 of file FixedAreaIsolationCone.cc.

References areaFunctionSignalCone_, areaRootFinderIsolationCone_, areaRootFunctionIsolationCone_, category(), debugLevel_, Pi, ConeAreaRootFunction::SetParameterConeArea(), ConeAreaFunction::SetParameterPhi0(), and ConeAreaFunction::SetParameterTheta0().

{
  areaFunctionSignalCone_.SetParameterTheta0(coneAxisTheta);
  areaFunctionSignalCone_.SetParameterPhi0(coneAxisPhi);
  double areaSignalCone = areaFunctionSignalCone_(openingAngleSignalCone);

  areaRootFunctionIsolationCone_.SetParameterTheta0(coneAxisTheta);
  areaRootFunctionIsolationCone_.SetParameterPhi0(coneAxisPhi);
  areaRootFunctionIsolationCone_.SetParameterConeArea(areaIsolationCone + areaSignalCone);
  areaRootFinderIsolationCone_.SetFunction(areaRootFunctionIsolationCone_, 0. , TMath::Pi());
  int statusIsolationCone = areaRootFinderIsolationCone_.Solve();
  double openingAngleIsolationCone = areaRootFinderIsolationCone_.Root();

  if ( debugLevel_ > 0 ) {
    const std::string category = "FixedAreaIsolationCone::operator()";
    edm::LogVerbatim(category) << "openingAngleSignalCone = " << openingAngleSignalCone << std::endl;
    edm::LogVerbatim(category) << "areaSignalCone = " << areaSignalCone << std::endl;
    edm::LogVerbatim(category) << "areaIsolationCone = " << areaIsolationCone << std::endl;
    edm::LogVerbatim(category) << "openingAngleIsolationCone = " << openingAngleIsolationCone << std::endl;
    edm::LogVerbatim(category) << "statusIsolationCone = " << statusIsolationCone << std::endl;
  }

  if ( statusIsolationCone == 0 ) { 
    error = 0;
    return openingAngleIsolationCone;
  } else {
    error = 1;
    return 0.;
  }
}

void FixedAreaIsolationCone::setAcceptanceLimit ( double etaMaxTrackingAcceptance )

Definition at line 50 of file FixedAreaIsolationCone.cc.

References areaFunctionSignalCone_, areaRootFunctionIsolationCone_, and ConeAreaFunction::SetAcceptanceLimit().

Referenced by PFTauElementsOperators::computeInsideOutContents(), CaloTauElementsOperators::EcalRecHitsInAnnulus(), and CaloTauElementsOperators::EcalRecHitsInCone().

{
  areaFunctionSignalCone_.SetAcceptanceLimit(etaMaxTrackingAcceptance);
  areaRootFunctionIsolationCone_.SetAcceptanceLimit(etaMaxTrackingAcceptance);
}